# Copyright (c) 2022, Frappe Technologies Pvt. Ltd. and Contributors
# License: MIT. See LICENSE

import base64
import datetime
import json
import math
import operator
import re
import time
import typing
from code import compile_command
from enum import Enum
from typing import Any, Literal, Optional, TypeVar, Union
from urllib.parse import parse_qsl, quote, urlencode, urljoin, urlparse, urlunparse

from click import secho
from dateutil import parser
from dateutil.parser import ParserError
from dateutil.relativedelta import relativedelta

import frappe
from frappe.desk.utils import slug

DateTimeLikeObject = Union[str, datetime.date, datetime.datetime]
NumericType = Union[int, float]


if typing.TYPE_CHECKING:
	T = TypeVar("T")


DATE_FORMAT = "%Y-%m-%d"
TIME_FORMAT = "%H:%M:%S.%f"
DATETIME_FORMAT = f"{DATE_FORMAT} {TIME_FORMAT}"
TIMEDELTA_DAY_PATTERN = re.compile(
	r"(?P<days>[-\d]+) day[s]*, (?P<hours>\d+):(?P<minutes>\d+):(?P<seconds>\d[\.\d+]*)"
)
TIMEDELTA_BASE_PATTERN = re.compile(r"(?P<hours>\d+):(?P<minutes>\d+):(?P<seconds>\d[\.\d+]*)")
URLS_HTTP_TAG_PATTERN = re.compile(
	r'(href|src){1}([\s]*=[\s]*[\'"]?)((?:http)[^\'">]+)([\'"]?)'
)  # href='https://...
URLS_NOT_HTTP_TAG_PATTERN = re.compile(
	r'(href|src){1}([\s]*=[\s]*[\'"]?)((?!http)[^\'" >]+)([\'"]?)'
)  # href=/assets/...
URL_NOTATION_PATTERN = re.compile(
	r'(:[\s]?url)(\([\'"]?)((?!http)[^\'" >]+)([\'"]?\))'
)  # background-image: url('/assets/...')
DURATION_PATTERN = re.compile(r"^(?:(\d+d)?((^|\s)\d+h)?((^|\s)\d+m)?((^|\s)\d+s)?)$")
HTML_TAG_PATTERN = re.compile("<[^>]+>")
MARIADB_SPECIFIC_COMMENT = re.compile(r"#.*")


class Weekday(Enum):
	Sunday = 0
	Monday = 1
	Tuesday = 2
	Wednesday = 3
	Thursday = 4
	Friday = 5
	Saturday = 6


def get_first_day_of_the_week() -> str:
	return frappe.get_system_settings("first_day_of_the_week") or "Sunday"


def get_start_of_week_index() -> int:
	return Weekday[get_first_day_of_the_week()].value


def is_invalid_date_string(date_string: str) -> bool:
	# dateutil parser does not agree with dates like "0001-01-01" or "0000-00-00"
	return not isinstance(date_string, str) or (
		(not date_string) or (date_string or "").startswith(("0001-01-01", "0000-00-00"))
	)


def getdate(
	string_date: Optional["DateTimeLikeObject"] = None, parse_day_first: bool = False
) -> datetime.date | None:
	"""
	Converts string date (yyyy-mm-dd) to datetime.date object.
	If no input is provided, current date is returned.
	"""
	if not string_date:
		return get_datetime().date()
	if isinstance(string_date, datetime.datetime):
		return string_date.date()

	elif isinstance(string_date, datetime.date):
		return string_date

	if is_invalid_date_string(string_date):
		return None
	try:
		return parser.parse(string_date, dayfirst=parse_day_first).date()
	except ParserError:
		frappe.throw(
			frappe._("{} is not a valid date string.").format(frappe.bold(string_date)),
			title=frappe._("Invalid Date"),
		)


def get_datetime(
	datetime_str: Optional["DateTimeLikeObject"] = None,
) -> datetime.datetime | None:

	if datetime_str is None:
		return now_datetime()

	if isinstance(datetime_str, (datetime.datetime, datetime.timedelta)):
		return datetime_str

	elif isinstance(datetime_str, (list, tuple)):
		return datetime.datetime(datetime_str)

	elif isinstance(datetime_str, datetime.date):
		return datetime.datetime.combine(datetime_str, datetime.time())

	if is_invalid_date_string(datetime_str):
		return None

	try:
		return datetime.datetime.strptime(datetime_str, DATETIME_FORMAT)
	except ValueError:
		return parser.parse(datetime_str)


def get_timedelta(time: str | None = None) -> datetime.timedelta | None:
	"""Return `datetime.timedelta` object from string value of a
	valid time format. Returns None if `time` is not a valid format

	Args:
	        time (str): A valid time representation. This string is parsed
	        using `dateutil.parser.parse`. Examples of valid inputs are:
	        '0:0:0', '17:21:00', '2012-01-19 17:21:00'. Checkout
	        https://dateutil.readthedocs.io/en/stable/parser.html#dateutil.parser.parse

	Returns:
	        datetime.timedelta: Timedelta object equivalent of the passed `time` string
	"""
	time = time or "0:0:0"

	try:
		try:
			t = parser.parse(time)
		except ParserError as e:
			if "day" in e.args[1] or "hour must be in" in e.args[0]:
				return parse_timedelta(time)
			raise e
		return datetime.timedelta(
			hours=t.hour, minutes=t.minute, seconds=t.second, microseconds=t.microsecond
		)
	except Exception:
		return None


def to_timedelta(time_str: str | datetime.time) -> datetime.timedelta:
	if isinstance(time_str, datetime.time):
		time_str = str(time_str)

	if isinstance(time_str, str):
		t = parser.parse(time_str)
		return datetime.timedelta(
			hours=t.hour, minutes=t.minute, seconds=t.second, microseconds=t.microsecond
		)

	else:
		return time_str


@typing.overload
def add_to_date(
	date,
	years=0,
	months=0,
	weeks=0,
	days=0,
	hours=0,
	minutes=0,
	seconds=0,
	as_string: Literal[False] = False,
	as_datetime: Literal[False] = False,
) -> datetime.date:
	...


@typing.overload
def add_to_date(
	date,
	years=0,
	months=0,
	weeks=0,
	days=0,
	hours=0,
	minutes=0,
	seconds=0,
	as_string: Literal[False] = False,
	as_datetime: Literal[True] = True,
) -> datetime.datetime:
	...


@typing.overload
def add_to_date(
	date,
	years=0,
	months=0,
	weeks=0,
	days=0,
	hours=0,
	minutes=0,
	seconds=0,
	as_string: Literal[True] = True,
	as_datetime: bool = False,
) -> str:
	...


def add_to_date(
	date: DateTimeLikeObject,
	years=0,
	months=0,
	weeks=0,
	days=0,
	hours=0,
	minutes=0,
	seconds=0,
	as_string=False,
	as_datetime=False,
) -> DateTimeLikeObject:
	"""Adds `days` to the given date"""

	if date is None:
		date = now_datetime()

	if hours:
		as_datetime = True

	if isinstance(date, str):
		as_string = True
		if " " in date:
			as_datetime = True
		try:
			date = parser.parse(date)
		except ParserError:
			frappe.throw(frappe._("Please select a valid date filter"), title=frappe._("Invalid Date"))

	date = date + relativedelta(
		years=years, months=months, weeks=weeks, days=days, hours=hours, minutes=minutes, seconds=seconds
	)

	if as_string:
		if as_datetime:
			return date.strftime(DATETIME_FORMAT)
		else:
			return date.strftime(DATE_FORMAT)
	else:
		return date


def add_days(date, days):
	return add_to_date(date, days=days)


def add_months(date, months):
	return add_to_date(date, months=months)


def add_years(date, years):
	return add_to_date(date, years=years)


def date_diff(string_ed_date, string_st_date):
	return (getdate(string_ed_date) - getdate(string_st_date)).days


def month_diff(string_ed_date, string_st_date):
	ed_date = getdate(string_ed_date)
	st_date = getdate(string_st_date)
	return (ed_date.year - st_date.year) * 12 + ed_date.month - st_date.month + 1


def time_diff(string_ed_date, string_st_date):
	return get_datetime(string_ed_date) - get_datetime(string_st_date)


def time_diff_in_seconds(string_ed_date, string_st_date):
	return time_diff(string_ed_date, string_st_date).total_seconds()


def time_diff_in_hours(string_ed_date, string_st_date):
	return round(float(time_diff(string_ed_date, string_st_date).total_seconds()) / 3600, 6)


def now_datetime():
	dt = convert_utc_to_system_timezone(datetime.datetime.utcnow())
	return dt.replace(tzinfo=None)


def get_timestamp(date):
	return time.mktime(getdate(date).timetuple())


def get_eta(from_time, percent_complete):
	diff = time_diff(now_datetime(), from_time).total_seconds()
	return str(datetime.timedelta(seconds=(100 - percent_complete) / percent_complete * diff))


def _get_system_timezone():
	return frappe.db.get_system_setting("time_zone") or "Asia/Kolkata"  # Default to India ?!


def get_system_timezone():
	if frappe.local.flags.in_test:
		return _get_system_timezone()

	return frappe.cache.get_value("time_zone", _get_system_timezone)


def convert_utc_to_timezone(utc_timestamp, time_zone):
	from pytz import UnknownTimeZoneError, timezone

	utcnow = timezone("UTC").localize(utc_timestamp)
	try:
		return utcnow.astimezone(timezone(time_zone))
	except UnknownTimeZoneError:
		return utcnow


def get_datetime_in_timezone(time_zone):
	utc_timestamp = datetime.datetime.utcnow()
	return convert_utc_to_timezone(utc_timestamp, time_zone)


def convert_utc_to_system_timezone(utc_timestamp):
	time_zone = get_system_timezone()
	return convert_utc_to_timezone(utc_timestamp, time_zone)


def now() -> str:
	"""return current datetime as yyyy-mm-dd hh:mm:ss"""
	if frappe.flags.current_date:
		return (
			getdate(frappe.flags.current_date).strftime(DATE_FORMAT)
			+ " "
			+ now_datetime().strftime(TIME_FORMAT)
		)
	else:
		return now_datetime().strftime(DATETIME_FORMAT)


def nowdate() -> str:
	"""return current date as yyyy-mm-dd"""
	return now_datetime().strftime(DATE_FORMAT)


def today() -> str:
	return nowdate()


def get_abbr(string: str, max_len: int = 2) -> str:
	abbr = ""
	for part in string.split(" "):
		if len(abbr) < max_len and part:
			abbr += part[0]

	return abbr or "?"


def nowtime() -> str:
	"""return current time in hh:mm"""
	return now_datetime().strftime(TIME_FORMAT)


@typing.overload
def get_first_day(dt, d_years=0, d_months=0, as_str: Literal[False] = False) -> datetime.date:
	...


@typing.overload
def get_first_day(dt, d_years=0, d_months=0, as_str: Literal[True] = False) -> str:
	...


# TODO: first arg
def get_first_day(
	dt, d_years: int = 0, d_months: int = 0, as_str: bool = False
) -> str | datetime.date:
	"""
	Returns the first day of the month for the date specified by date object
	Also adds `d_years` and `d_months` if specified
	"""
	dt = getdate(dt)

	# d_years, d_months are "deltas" to apply to dt
	overflow_years, month = divmod(dt.month + d_months - 1, 12)
	year = dt.year + d_years + overflow_years

	return (
		datetime.date(year, month + 1, 1).strftime(DATE_FORMAT)
		if as_str
		else datetime.date(year, month + 1, 1)
	)


@typing.overload
def get_quarter_start(dt, as_str: Literal[False] = False) -> datetime.date:
	...


@typing.overload
def get_quarter_start(dt, as_str: Literal[True] = False) -> str:
	...


def get_quarter_start(dt, as_str: bool = False) -> str | datetime.date:
	date = getdate(dt)
	quarter = (date.month - 1) // 3 + 1
	first_date_of_quarter = datetime.date(date.year, ((quarter - 1) * 3) + 1, 1)
	return first_date_of_quarter.strftime(DATE_FORMAT) if as_str else first_date_of_quarter


def get_first_day_of_week(dt, as_str=False):
	dt = getdate(dt)
	date = dt - datetime.timedelta(days=get_week_start_offset_days(dt))
	return date.strftime(DATE_FORMAT) if as_str else date


def get_week_start_offset_days(dt):
	current_day_index = get_normalized_weekday_index(dt)
	start_of_week_index = get_start_of_week_index()

	if current_day_index >= start_of_week_index:
		return current_day_index - start_of_week_index
	else:
		return 7 - (start_of_week_index - current_day_index)


def get_normalized_weekday_index(dt):
	# starts Sunday with 0
	return (dt.weekday() + 1) % 7


def get_year_start(dt, as_str=False):
	dt = getdate(dt)
	date = datetime.date(dt.year, 1, 1)
	return date.strftime(DATE_FORMAT) if as_str else date


def get_last_day_of_week(dt):
	dt = get_first_day_of_week(dt)
	return dt + datetime.timedelta(days=6)


def get_last_day(dt):
	"""
	Returns last day of the month using:
	`get_first_day(dt, 0, 1) + datetime.timedelta(-1)`
	"""
	return get_first_day(dt, 0, 1) + datetime.timedelta(-1)


def is_last_day_of_the_month(dt):
	last_day_of_the_month = get_last_day(dt)

	return getdate(dt) == getdate(last_day_of_the_month)


def get_quarter_ending(date):
	date = getdate(date)

	# find the earliest quarter ending date that is after
	# the given date
	for month in (3, 6, 9, 12):
		quarter_end_month = getdate(f"{date.year}-{month}-01")
		quarter_end_date = getdate(get_last_day(quarter_end_month))
		if date <= quarter_end_date:
			date = quarter_end_date
			break

	return date


def get_year_ending(date) -> datetime.date:
	"""returns year ending of the given date"""
	date = getdate(date)
	next_year_start = datetime.date(date.year + 1, 1, 1)
	return add_to_date(next_year_start, days=-1)


def get_time(time_str: str) -> datetime.time:
	if isinstance(time_str, datetime.datetime):
		return time_str.time()
	elif isinstance(time_str, datetime.time):
		return time_str
	elif isinstance(time_str, datetime.timedelta):
		return (datetime.datetime.min + time_str).time()
	try:
		return parser.parse(time_str).time()
	except ParserError as e:
		if "day" in e.args[1] or "hour must be in" in e.args[0]:
			return (datetime.datetime.min + parse_timedelta(time_str)).time()
		raise e


def get_datetime_str(datetime_obj) -> str:
	if isinstance(datetime_obj, str):
		datetime_obj = get_datetime(datetime_obj)
	return datetime_obj.strftime(DATETIME_FORMAT)


def get_date_str(date_obj) -> str:
	if isinstance(date_obj, str):
		date_obj = get_datetime(date_obj)
	return date_obj.strftime(DATE_FORMAT)


def get_time_str(timedelta_obj) -> str:
	if isinstance(timedelta_obj, str):
		timedelta_obj = to_timedelta(timedelta_obj)

	hours, remainder = divmod(timedelta_obj.seconds, 3600)
	minutes, seconds = divmod(remainder, 60)
	return f"{hours}:{minutes}:{seconds}"


def get_user_date_format() -> str:
	"""Get the current user date format. The result will be cached."""
	if getattr(frappe.local, "user_date_format", None) is None:
		frappe.local.user_date_format = frappe.db.get_default("date_format")

	return frappe.local.user_date_format or "yyyy-mm-dd"


get_user_format = get_user_date_format  # for backwards compatibility


def get_user_time_format() -> str:
	"""Get the current user time format. The result will be cached."""
	if getattr(frappe.local, "user_time_format", None) is None:
		frappe.local.user_time_format = frappe.db.get_default("time_format")

	return frappe.local.user_time_format or "HH:mm:ss"


def format_date(
	string_date=None, format_string: str | None = None, parse_day_first: bool = False
) -> str:
	"""Converts the given string date to :data:`user_date_format`
	User format specified in defaults

	Examples:

	* dd-mm-yyyy
	* mm-dd-yyyy
	* dd/mm/yyyy
	"""
	import babel.dates
	from babel.core import UnknownLocaleError

	if not string_date:
		return ""

	date = getdate(string_date, parse_day_first)
	if not format_string:
		format_string = get_user_date_format()
	format_string = format_string.replace("mm", "MM").replace("Y", "y")
	try:
		formatted_date = babel.dates.format_date(
			date, format_string, locale=(frappe.local.lang or "").replace("-", "_")
		)
	except UnknownLocaleError:
		format_string = format_string.replace("MM", "%m").replace("dd", "%d").replace("yyyy", "%Y")
		formatted_date = date.strftime(format_string)
	return formatted_date


formatdate = format_date  # For backwards compatibility


def format_time(time_string=None, format_string: str | None = None) -> str:
	"""Converts the given string time to :data:`user_time_format`
	User format specified in defaults

	Examples:

	* HH:mm:ss
	* HH:mm
	"""
	import babel.dates
	from babel.core import UnknownLocaleError

	if not time_string:
		return ""

	time_ = get_time(time_string)
	if not format_string:
		format_string = get_user_time_format()
	try:
		formatted_time = babel.dates.format_time(
			time_, format_string, locale=(frappe.local.lang or "").replace("-", "_")
		)
	except UnknownLocaleError:
		formatted_time = time_.strftime("%H:%M:%S")
	return formatted_time


def format_datetime(datetime_string: DateTimeLikeObject, format_string: str | None = None) -> str:
	"""Converts the given string time to :data:`user_datetime_format`
	User format specified in defaults

	Examples:

	* dd-mm-yyyy HH:mm:ss
	* mm-dd-yyyy HH:mm
	"""
	import babel.dates
	from babel.core import UnknownLocaleError

	if not datetime_string:
		return

	datetime = get_datetime(datetime_string)
	if not format_string:
		format_string = get_user_date_format().replace("mm", "MM") + " " + get_user_time_format()

	try:
		formatted_datetime = babel.dates.format_datetime(
			datetime, format_string, locale=(frappe.local.lang or "").replace("-", "_")
		)
	except UnknownLocaleError:
		formatted_datetime = datetime.strftime("%Y-%m-%d %H:%M:%S")
	return formatted_datetime


def format_duration(seconds, hide_days=False):
	"""Converts the given duration value in float(seconds) to duration format

	example: converts 12885 to '3h 34m 45s' where 12885 = seconds in float
	"""

	seconds = cint(seconds)

	total_duration = {
		"days": math.floor(seconds / (3600 * 24)),
		"hours": math.floor(seconds % (3600 * 24) / 3600),
		"minutes": math.floor(seconds % 3600 / 60),
		"seconds": math.floor(seconds % 60),
	}

	if hide_days:
		total_duration["hours"] = math.floor(seconds / 3600)
		total_duration["days"] = 0

	duration = ""
	if total_duration:
		if total_duration.get("days"):
			duration += str(total_duration.get("days")) + "d"
		if total_duration.get("hours"):
			duration += " " if len(duration) else ""
			duration += str(total_duration.get("hours")) + "h"
		if total_duration.get("minutes"):
			duration += " " if len(duration) else ""
			duration += str(total_duration.get("minutes")) + "m"
		if total_duration.get("seconds"):
			duration += " " if len(duration) else ""
			duration += str(total_duration.get("seconds")) + "s"

	return duration


def duration_to_seconds(duration):
	"""Converts the given duration formatted value to duration value in seconds

	example: converts '3h 34m 45s' to 12885 (value in seconds)
	"""
	validate_duration_format(duration)
	value = 0
	if "d" in duration:
		val = duration.split("d")
		days = val[0]
		value += cint(days) * 24 * 60 * 60
		duration = val[1]
	if "h" in duration:
		val = duration.split("h")
		hours = val[0]
		value += cint(hours) * 60 * 60
		duration = val[1]
	if "m" in duration:
		val = duration.split("m")
		mins = val[0]
		value += cint(mins) * 60
		duration = val[1]
	if "s" in duration:
		val = duration.split("s")
		secs = val[0]
		value += cint(secs)

	return value


def validate_duration_format(duration):
	if not DURATION_PATTERN.match(duration):
		frappe.throw(
			frappe._("Value {0} must be in the valid duration format: d h m s").format(
				frappe.bold(duration)
			)
		)


def get_weekdays():
	return ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"]


def get_weekday(datetime: datetime.datetime | None = None) -> str:
	if not datetime:
		datetime = now_datetime()
	weekdays = get_weekdays()
	return weekdays[datetime.weekday()]


def get_timespan_date_range(timespan: str) -> tuple[datetime.datetime, datetime.datetime] | None:
	today = getdate()

	match timespan:
		case "last week":
			return (
				get_first_day_of_week(add_to_date(today, days=-7)),
				get_last_day_of_week(add_to_date(today, days=-7)),
			)
		case "last month":
			return (
				get_first_day(add_to_date(today, months=-1)),
				get_last_day(add_to_date(today, months=-1)),
			)
		case "last quarter":
			return (
				get_quarter_start(add_to_date(today, months=-3)),
				get_quarter_ending(add_to_date(today, months=-3)),
			)
		case "last 6 months":
			return (
				get_quarter_start(add_to_date(today, months=-6)),
				get_quarter_ending(add_to_date(today, months=-3)),
			)
		case "last year":
			return (
				get_year_start(add_to_date(today, years=-1)),
				get_year_ending(add_to_date(today, years=-1)),
			)

		case "yesterday":
			return (add_to_date(today, days=-1),) * 2
		case "today":
			return (today, today)
		case "tomorrow":
			return (add_to_date(today, days=1),) * 2
		case "this week":
			return (get_first_day_of_week(today), get_last_day_of_week(today))
		case "this month":
			return (get_first_day(today), get_last_day(today))
		case "this quarter":
			return (get_quarter_start(today), get_quarter_ending(today))
		case "this year":
			return (get_year_start(today), get_year_ending(today))
		case "next week":
			return (
				get_first_day_of_week(add_to_date(today, days=7)),
				get_last_day_of_week(add_to_date(today, days=7)),
			)
		case "next month":
			return (
				get_first_day(add_to_date(today, months=1)),
				get_last_day(add_to_date(today, months=1)),
			)
		case "next quarter":
			return (
				get_quarter_start(add_to_date(today, months=3)),
				get_quarter_ending(add_to_date(today, months=3)),
			)
		case "next 6 months":
			return (
				get_quarter_start(add_to_date(today, months=3)),
				get_quarter_ending(add_to_date(today, months=6)),
			)
		case "next year":
			return (
				get_year_start(add_to_date(today, years=1)),
				get_year_ending(add_to_date(today, years=1)),
			)
		case _:
			return


def global_date_format(date, format="long"):
	"""returns localized date in the form of January 1, 2012"""
	import babel.dates

	date = getdate(date)
	return babel.dates.format_date(
		date, locale=(frappe.local.lang or "en").replace("-", "_"), format=format
	)


def has_common(l1: typing.Hashable, l2: typing.Hashable) -> bool:
	"""Returns truthy value if there are common elements in lists l1 and l2"""
	return set(l1) & set(l2)


def cast_fieldtype(fieldtype, value, show_warning=True):
	if show_warning:
		message = (
			"Function `frappe.utils.data.cast_fieldtype` has been deprecated in favour"
			" of `frappe.utils.data.cast`. Use the newer util for safer type casting."
		)
		secho(message, fg="yellow")

	if fieldtype in ("Currency", "Float", "Percent"):
		value = flt(value)

	elif fieldtype in ("Int", "Check"):
		value = cint(value)

	elif fieldtype in (
		"Data",
		"Text",
		"Small Text",
		"Long Text",
		"Text Editor",
		"Select",
		"Link",
		"Dynamic Link",
	):
		value = cstr(value)

	elif fieldtype == "Date":
		value = getdate(value)

	elif fieldtype == "Datetime":
		value = get_datetime(value)

	elif fieldtype == "Time":
		value = to_timedelta(value)

	return value


def cast(fieldtype, value=None):
	"""Cast the value to the Python native object of the Frappe fieldtype provided.
	If value is None, the first/lowest value of the `fieldtype` will be returned.
	If value can't be cast as fieldtype due to an invalid input, None will be returned.

	Mapping of Python types => Frappe types:
	        * str => ("Data", "Text", "Small Text", "Long Text", "Text Editor", "Select", "Link", "Dynamic Link")
	        * float => ("Currency", "Float", "Percent")
	        * int => ("Int", "Check")
	        * datetime.datetime => ("Datetime",)
	        * datetime.date => ("Date",)
	        * datetime.time => ("Time",)
	"""
	if fieldtype in ("Currency", "Float", "Percent"):
		value = flt(value)

	elif fieldtype in ("Int", "Check"):
		value = cint(sbool(value))

	elif fieldtype in (
		"Data",
		"Text",
		"Small Text",
		"Long Text",
		"Text Editor",
		"Select",
		"Link",
		"Dynamic Link",
	):
		value = cstr(value)

	elif fieldtype == "Date":
		if value:
			value = getdate(value)
		else:
			value = datetime.datetime(1, 1, 1).date()

	elif fieldtype == "Datetime":
		if value:
			value = get_datetime(value)
		else:
			value = datetime.datetime(1, 1, 1)

	elif fieldtype == "Time":
		value = get_timedelta(value)

	return value


@typing.overload
def flt(s: NumericType | str, precision: Literal[0]) -> int:
	...


@typing.overload
def flt(s: NumericType | str, precision: int | None = None) -> float:
	...


def flt(
	s: NumericType | str, precision: int | None = None, rounding_method: str | None = None
) -> float:
	"""Convert to float (ignoring commas in string)

	:param s: Number in string or other numeric format.
	:param precision: optional argument to specify precision for rounding.
	:returns: Converted number in python float type.

	Returns 0 if input can not be converted to float.

	Examples:

	>>> flt("43.5", precision=0)
	44
	>>> flt("42.5", precision=0)
	42
	>>> flt("10,500.5666", precision=2)
	10500.57
	>>> flt("a")
	0.0
	"""
	if isinstance(s, str):
		s = s.replace(",", "")

	try:
		num = float(s)
		if precision is not None:
			num = rounded(num, precision, rounding_method)
	except Exception as e:
		if isinstance(e, frappe.InvalidRoundingMethod):
			raise
		num = 0.0

	return num


def cint(s: NumericType | str, default: int = 0) -> int:
	"""Convert to integer

	:param s: Number in string or other numeric format.
	:returns: Converted number in python integer type.

	Returns default if input can not be converted to integer.

	Examples:
	>>> cint("100")
	100
	>>> cint("a")
	0

	"""
	try:
		return int(float(s))
	except Exception:
		return default


def floor(s):
	"""
	A number representing the largest integer less than or equal to the specified number

	Parameters
	----------
	s : int or str or Decimal object
	        The mathematical value to be floored

	Returns
	-------
	int
	        number representing the largest integer less than or equal to the specified number

	"""
	try:
		num = cint(math.floor(flt(s)))
	except Exception:
		num = 0
	return num


def ceil(s):
	"""
	The smallest integer greater than or equal to the given number

	Parameters
	----------
	s : int or str or Decimal object
	        The mathematical value to be ceiled

	Returns
	-------
	int
	        smallest integer greater than or equal to the given number

	"""
	try:
		num = cint(math.ceil(flt(s)))
	except Exception:
		num = 0
	return num


def cstr(s, encoding="utf-8"):
	return frappe.as_unicode(s, encoding)


def sbool(x: str) -> bool | Any:
	"""Converts str object to Boolean if possible.
	Example:
	        "true" becomes True
	        "1" becomes True
	        "{}" remains "{}"

	Args:
	        x (str): String to be converted to Bool

	Returns:
	        object: Returns Boolean or x
	"""
	try:
		val = x.lower()
		if val in ("true", "1"):
			return True
		elif val in ("false", "0"):
			return False
		return x
	except Exception:
		return x


def rounded(num, precision=0, rounding_method=None):
	"""Round according to method set in system setting, defaults to banker's rounding"""
	precision = cint(precision)

	rounding_method = (
		rounding_method or frappe.get_system_settings("rounding_method") or "Banker's Rounding (legacy)"
	)

	if rounding_method == "Banker's Rounding (legacy)":
		return _bankers_rounding_legacy(num, precision)
	elif rounding_method == "Banker's Rounding":
		return _bankers_rounding(num, precision)
	elif rounding_method == "Commercial Rounding":
		return _round_away_from_zero(num, precision)
	else:
		frappe.throw(
			frappe._("Unknown Rounding Method: {}").format(rounding_method),
			exc=frappe.InvalidRoundingMethod,
		)


def _bankers_rounding_legacy(num, precision):
	# avoid rounding errors
	multiplier = 10**precision
	num = round(num * multiplier if precision else num, 8)

	floor_num = math.floor(num)
	decimal_part = num - floor_num

	if not precision and decimal_part == 0.5:
		num = floor_num if (floor_num % 2 == 0) else floor_num + 1
	else:
		if decimal_part == 0.5:
			num = floor_num + 1
		else:
			num = round(num)

	return (num / multiplier) if precision else num


def _round_away_from_zero(num, precision):
	if num == 0:
		return 0.0

	# Epsilon is small correctional value added to correctly round numbers which can't be
	# represented in IEEE 754 representation.

	# In simplified terms, the representation optimizes for absolute errors in representation
	# so if a number is not representable it might be represented by a value ever so slighly
	# smaller than the value itself. This becomes a problem when breaking ties for numbers
	# ending with 5 when it's represented by a smaller number. By adding a very small value
	# close to what's "least count" or smallest representable difference in the scale we force
	# the number to be bigger than actual value, this increases representation error but
	# removes rounding error.

	# References:
	# - https://docs.oracle.com/cd/E19957-01/806-3568/ncg_goldberg.html
	# - https://docs.python.org/3/tutorial/floatingpoint.html#representation-error
	# - https://docs.python.org/3/library/functions.html#round
	# - easier to understand: https://www.youtube.com/watch?v=pQs_wx8eoQ8

	epsilon = 2.0 ** (math.log(abs(num), 2) - 52.0)

	return round(num + math.copysign(epsilon, num), precision)


def _bankers_rounding(num, precision):
	multiplier = 10**precision
	num = round(num * multiplier, 12)

	if num == 0:
		return 0.0

	floor_num = math.floor(num)
	decimal_part = num - floor_num

	epsilon = 2.0 ** (math.log(abs(num), 2) - 52.0)
	if abs(decimal_part - 0.5) < epsilon:
		num = floor_num if (floor_num % 2 == 0) else floor_num + 1
	else:
		num = round(num)

	return num / multiplier


def remainder(numerator: NumericType, denominator: NumericType, precision: int = 2) -> NumericType:
	precision = cint(precision)
	multiplier = 10**precision

	if precision:
		_remainder = ((numerator * multiplier) % (denominator * multiplier)) / multiplier
	else:
		_remainder = numerator % denominator

	return flt(_remainder, precision)


def safe_div(numerator: NumericType, denominator: NumericType, precision: int = 2) -> float:
	"""
	SafeMath division that returns zero when divided by zero.
	"""
	precision = cint(precision)

	if denominator == 0:
		_res = 0.0
	else:
		_res = float(numerator) / denominator

	return flt(_res, precision)


def round_based_on_smallest_currency_fraction(value, currency, precision=2):
	smallest_currency_fraction_value = flt(
		frappe.db.get_value("Currency", currency, "smallest_currency_fraction_value", cache=True)
	)

	if smallest_currency_fraction_value:
		remainder_val = remainder(value, smallest_currency_fraction_value, precision)
		if remainder_val > (smallest_currency_fraction_value / 2):
			value += smallest_currency_fraction_value - remainder_val
		else:
			value -= remainder_val
	else:
		value = rounded(value)

	return flt(value, precision)


def encode(obj, encoding="utf-8"):
	if isinstance(obj, list):
		out = []
		for o in obj:
			if isinstance(o, str):
				out.append(o.encode(encoding))
			else:
				out.append(o)
		return out
	elif isinstance(obj, str):
		return obj.encode(encoding)
	else:
		return obj


def parse_val(v):
	"""Converts to simple datatypes from SQL query results"""
	if isinstance(v, (datetime.date, datetime.datetime)):
		v = str(v)
	elif isinstance(v, datetime.timedelta):
		v = ":".join(str(v).split(":")[:2])
	elif isinstance(v, int):
		v = int(v)
	return v


def fmt_money(
	amount: str | float | int | None,
	precision: int | None = None,
	currency: str | None = None,
	format: str | None = None,
) -> str:
	"""
	Convert to string with commas for thousands, millions etc
	"""
	number_format = format or frappe.db.get_default("number_format") or "#,###.##"
	if precision is None:
		precision = cint(frappe.db.get_default("currency_precision")) or None

	decimal_str, comma_str, number_format_precision = get_number_format_info(number_format)

	if precision is None:
		precision = number_format_precision

	# 40,000 -> 40,000.00
	# 40,000.00000 -> 40,000.00
	# 40,000.23000 -> 40,000.23

	if isinstance(amount, str):
		amount = flt(amount, precision)

	if amount is None:
		amount = 0

	if decimal_str:
		decimals_after = str(round(amount % 1, precision))
		parts = decimals_after.split(".")
		parts = parts[1] if len(parts) > 1 else parts[0]
		decimals = parts
		if precision > 2:
			if len(decimals) < 3:
				if currency:
					fraction = frappe.db.get_value("Currency", currency, "fraction_units", cache=True) or 100
					precision = len(cstr(fraction)) - 1
				else:
					precision = number_format_precision
			elif len(decimals) < precision:
				precision = len(decimals)

	amount = "%.*f" % (precision, round(flt(amount), precision))

	if amount.find(".") == -1:
		decimals = ""
	else:
		decimals = amount.split(".")[1]

	parts = []
	minus = ""
	if flt(amount) < 0:
		minus = "-"

	amount = cstr(abs(flt(amount))).split(".", 1)[0]

	if len(amount) > 3:
		parts.append(amount[-3:])
		amount = amount[:-3]

		val = number_format == "#,##,###.##" and 2 or 3

		while len(amount) > val:
			parts.append(amount[-val:])
			amount = amount[:-val]

	parts.append(amount)

	parts.reverse()

	amount = comma_str.join(parts) + ((precision and decimal_str) and (decimal_str + decimals) or "")
	if amount != "0":
		amount = minus + amount

	if currency and frappe.defaults.get_global_default("hide_currency_symbol") != "Yes":
		symbol = frappe.db.get_value("Currency", currency, "symbol", cache=True) or currency
		symbol_on_right = frappe.db.get_value("Currency", currency, "symbol_on_right", cache=True)

		if symbol_on_right:
			amount = f"{amount} {frappe._(symbol)}"
		else:
			amount = f"{frappe._(symbol)} {amount}"

	return amount


number_format_info = {
	"#,###.##": (".", ",", 2),
	"#.###,##": (",", ".", 2),
	"# ###.##": (".", " ", 2),
	"# ###,##": (",", " ", 2),
	"#'###.##": (".", "'", 2),
	"#, ###.##": (".", ", ", 2),
	"#,##,###.##": (".", ",", 2),
	"#,###.###": (".", ",", 3),
	"#.###": ("", ".", 0),
	"#,###": ("", ",", 0),
	"#.########": (".", "", 8),
}


def get_number_format_info(format: str) -> tuple[str, str, int]:
	return number_format_info.get(format) or (".", ",", 2)


#
# convert currency to words
#
def money_in_words(
	number: str | float | int,
	main_currency: str | None = None,
	fraction_currency: str | None = None,
):
	"""
	Returns string in words with currency and fraction currency.
	"""
	from frappe.utils import get_defaults

	_ = frappe._

	try:
		# note: `flt` returns 0 for invalid input and we don't want that
		number = float(number)
	except ValueError:
		return ""

	number = flt(number)
	if number < 0:
		return ""

	d = get_defaults()
	if not main_currency:
		main_currency = d.get("currency", "INR")
	if not fraction_currency:
		fraction_currency = frappe.db.get_value("Currency", main_currency, "fraction", cache=True) or _(
			"Cent"
		)

	number_format = (
		frappe.db.get_value("Currency", main_currency, "number_format", cache=True)
		or frappe.db.get_default("number_format")
		or "#,###.##"
	)

	fraction_length = get_number_format_info(number_format)[2]

	n = f"%.{fraction_length}f" % number

	numbers = n.split(".")
	main, fraction = numbers if len(numbers) > 1 else [n, "00"]

	if len(fraction) < fraction_length:
		zeros = "0" * (fraction_length - len(fraction))
		fraction += zeros

	in_million = True
	if number_format == "#,##,###.##":
		in_million = False

	# 0.00
	if main == "0" and fraction in ["00", "000"]:
		out = _(main_currency, context="Currency") + " " + _("Zero")
	# 0.XX
	elif main == "0":
		out = _(in_words(fraction, in_million).title()) + " " + fraction_currency
	else:
		out = _(main_currency, context="Currency") + " " + _(in_words(main, in_million).title())
		if cint(fraction):
			out = (
				out
				+ " "
				+ _("and")
				+ " "
				+ _(in_words(fraction, in_million).title())
				+ " "
				+ fraction_currency
			)

	return out + " " + _("only.")


#
# convert number to words
#
def in_words(integer: int, in_million=True) -> str:
	"""
	Returns string in words for the given integer.
	"""
	from num2words import num2words

	locale = "en_IN" if not in_million else frappe.local.lang
	integer = int(integer)
	try:
		ret = num2words(integer, lang=locale)
	except NotImplementedError:
		ret = num2words(integer, lang="en")
	except OverflowError:
		ret = num2words(integer, lang="en")
	return ret.replace("-", " ")


def is_html(text: str) -> bool:
	if not isinstance(text, str):
		return False
	return HTML_TAG_PATTERN.search(text)


def is_image(filepath: str) -> bool:
	from mimetypes import guess_type

	# filepath can be https://example.com/bed.jpg?v=129
	filepath = (filepath or "").split("?", 1)[0]
	return (guess_type(filepath)[0] or "").startswith("image/")


def get_thumbnail_base64_for_image(src):
	from os.path import exists as file_exists

	from PIL import Image

	from frappe import cache, safe_decode
	from frappe.core.doctype.file.utils import get_local_image

	if not src:
		frappe.throw(f"Invalid source for image: {src}")

	if not src.startswith("/files") or ".." in src:
		return

	if src.endswith(".svg"):
		return

	def _get_base64():
		file_path = frappe.get_site_path("public", src.lstrip("/"))
		if not file_exists(file_path):
			return

		try:
			image, unused_filename, extn = get_local_image(src)
		except OSError:
			return

		original_size = image.size
		size = 50, 50
		image.thumbnail(size, Image.Resampling.LANCZOS)

		base64_string = image_to_base64(image, extn)
		return {
			"base64": f"data:image/{extn};base64,{safe_decode(base64_string)}",
			"width": original_size[0],
			"height": original_size[1],
		}

	return cache().hget("thumbnail_base64", src, generator=_get_base64)


def image_to_base64(image, extn: str) -> bytes:
	from io import BytesIO

	buffered = BytesIO()
	if extn.lower() in ("jpg", "jpe"):
		extn = "JPEG"
	image.save(buffered, extn)
	return base64.b64encode(buffered.getvalue())


def pdf_to_base64(filename: str) -> bytes | None:
	from frappe.utils.file_manager import get_file_path

	if "../" in filename or filename.rsplit(".")[-1] not in ["pdf", "PDF"]:
		return

	file_path = get_file_path(filename)
	if not file_path:
		return

	with open(file_path, "rb") as pdf_file:
		base64_string = base64.b64encode(pdf_file.read())

	return base64_string


# from Jinja2 code
_striptags_re = re.compile(r"(<!--.*?-->|<[^>]*>)")


def strip_html(text: str) -> str:
	"""removes anything enclosed in and including <>"""
	return _striptags_re.sub("", text)


def escape_html(text: str) -> str:
	if not isinstance(text, str):
		return text

	html_escape_table = {
		"&": "&amp;",
		'"': "&quot;",
		"'": "&apos;",
		">": "&gt;",
		"<": "&lt;",
	}

	return "".join(html_escape_table.get(c, c) for c in text)


def pretty_date(iso_datetime: datetime.datetime | str) -> str:
	"""
	Return a localized string representation of the delta to the current system time.

	For example, "1 hour ago", "2 days ago", "in 5 seconds", etc.
	"""
	if not iso_datetime:
		return ""

	from babel.dates import format_timedelta

	if isinstance(iso_datetime, str):
		iso_datetime = datetime.datetime.strptime(iso_datetime, DATETIME_FORMAT)
	now_dt = datetime.datetime.strptime(now(), DATETIME_FORMAT)
	locale = frappe.local.lang.replace("-", "_") if frappe.local.lang else None
	return format_timedelta(iso_datetime - now_dt, add_direction=True, locale=locale)


def comma_or(some_list, add_quotes=True):
	return comma_sep(some_list, frappe._("{0} or {1}"), add_quotes)


def comma_and(some_list, add_quotes=True):
	return comma_sep(some_list, frappe._("{0} and {1}"), add_quotes)


def comma_sep(some_list, pattern, add_quotes=True):
	if isinstance(some_list, (list, tuple)):
		# list(some_list) is done to preserve the existing list
		some_list = [str(s) for s in list(some_list)]
		if not some_list:
			return ""
		elif len(some_list) == 1:
			return some_list[0]
		else:
			some_list = ["'%s'" % s for s in some_list] if add_quotes else ["%s" % s for s in some_list]
			return pattern.format(", ".join(frappe._(s) for s in some_list[:-1]), some_list[-1])
	else:
		return some_list


def new_line_sep(some_list):
	if isinstance(some_list, (list, tuple)):
		# list(some_list) is done to preserve the existing list
		some_list = [str(s) for s in list(some_list)]
		if not some_list:
			return ""
		elif len(some_list) == 1:
			return some_list[0]
		else:
			some_list = ["%s" % s for s in some_list]
			return format("\n ".join(some_list))
	else:
		return some_list


def filter_strip_join(some_list: list[str], sep: str) -> list[str]:
	"""given a list, filter None values, strip spaces and join"""
	return (cstr(sep)).join(cstr(a).strip() for a in filter(None, some_list))


def get_url(uri: str | None = None, full_address: bool = False) -> str:
	"""get app url from request"""
	host_name = frappe.local.conf.host_name or frappe.local.conf.hostname

	if uri and (uri.startswith("http://") or uri.startswith("https://")):
		return uri

	if not host_name:
		request_host_name = get_host_name_from_request()

		if request_host_name:
			host_name = request_host_name

		elif frappe.local.site:
			protocol = "http://"

			if frappe.local.conf.ssl_certificate:
				protocol = "https://"

			elif frappe.local.conf.wildcard:
				domain = frappe.local.conf.wildcard.get("domain")
				if (
					domain
					and frappe.local.site.endswith(domain)
					and frappe.local.conf.wildcard.get("ssl_certificate")
				):
					protocol = "https://"

			host_name = protocol + frappe.local.site

		else:
			host_name = frappe.db.get_single_value("Website Settings", "subdomain")

			if not host_name:
				host_name = "http://localhost"

	if host_name and not (host_name.startswith("http://") or host_name.startswith("https://")):
		host_name = "http://" + host_name

	if not uri and full_address:
		uri = frappe.get_request_header("REQUEST_URI", "")

	port = frappe.conf.http_port or frappe.conf.webserver_port

	if (
		not (frappe.conf.restart_supervisor_on_update or frappe.conf.restart_systemd_on_update)
		and host_name
		and not url_contains_port(host_name)
		and port
	):
		host_name = host_name + ":" + str(port)

	return urljoin(host_name, uri) if uri else host_name


def get_host_name_from_request() -> str:
	if hasattr(frappe.local, "request") and frappe.local.request and frappe.local.request.host:
		protocol = (
			"https://" if "https" == frappe.get_request_header("X-Forwarded-Proto", "") else "http://"
		)
		return protocol + frappe.local.request.host


def url_contains_port(url: str) -> bool:
	parts = url.split(":")
	return len(parts) > 2


def get_host_name() -> str:
	return get_url().rsplit("//", 1)[-1]


def get_link_to_form(doctype: str, name: str, label: str | None = None) -> str:
	if not label:
		label = name

	return f"""<a href="{get_url_to_form(doctype, name)}">{label}</a>"""


def get_link_to_report(
	name: str,
	label: str | None = None,
	report_type: str | None = None,
	doctype: str | None = None,
	filters: dict | None = None,
) -> str:
	if not label:
		label = name

	if filters:
		conditions = []
		for k, v in filters.items():
			if isinstance(v, list):
				conditions.extend(
					str(k) + "=" + '["' + str(value[0] + '"' + "," + '"' + str(value[1]) + '"]') for value in v
				)
			else:
				conditions.append(str(k) + "=" + str(v))

		filters = "&".join(conditions)

		return """<a href='{}'>{}</a>""".format(
			get_url_to_report_with_filters(name, filters, report_type, doctype), label
		)
	else:
		return f"""<a href='{get_url_to_report(name, report_type, doctype)}'>{label}</a>"""


def get_absolute_url(doctype: str, name: str) -> str:
	return f"/app/{quoted(slug(doctype))}/{quoted(name)}"


def get_url_to_form(doctype: str, name: str) -> str:
	return get_url(uri=f"/app/{quoted(slug(doctype))}/{quoted(name)}")


def get_url_to_list(doctype: str) -> str:
	return get_url(uri=f"/app/{quoted(slug(doctype))}")


def get_url_to_report(name, report_type: str | None = None, doctype: str | None = None) -> str:
	if report_type == "Report Builder":
		return get_url(uri=f"/app/{quoted(slug(doctype))}/view/report/{quoted(name)}")
	else:
		return get_url(uri=f"/app/query-report/{quoted(name)}")


def get_url_to_report_with_filters(name, filters, report_type=None, doctype=None):
	if report_type == "Report Builder":
		return get_url(uri=f"/app/{quoted(slug(doctype))}/view/report?{filters}")

	return get_url(uri=f"/app/query-report/{quoted(name)}?{filters}")


operator_map = {
	# startswith
	"^": lambda a, b: (a or "").startswith(b),
	# in or not in a list
	"in": lambda a, b: operator.contains(b, a),
	"not in": lambda a, b: not operator.contains(b, a),
	# comparison operators
	"=": operator.eq,
	"!=": operator.ne,
	">": operator.gt,
	"<": operator.lt,
	">=": operator.ge,
	"<=": operator.le,
	"not None": lambda a, b: a is not None,
	"None": lambda a, b: a is None,
	"like": lambda a, b: operator.contains(a.strip("%"), b.strip("%")),
	"not like": lambda a, b: not operator.contains(a.strip("%"), b.strip("%")),
}


def evaluate_filters(doc, filters: dict | list | tuple):
	"""Returns true if doc matches filters"""
	if isinstance(filters, dict):
		for key, value in filters.items():
			f = get_filter(None, {key: value})
			if not compare(doc.get(f.fieldname), f.operator, f.value, f.fieldtype):
				return False

	elif isinstance(filters, (list, tuple)):
		for d in filters:
			f = get_filter(None, d)
			if not compare(doc.get(f.fieldname), f.operator, f.value, f.fieldtype):
				return False

	return True


def compare(val1: Any, condition: str, val2: Any, fieldtype: str | None = None):
	if fieldtype:
		val1 = cast(fieldtype, val1)
		val2 = cast(fieldtype, val2)
	if condition in operator_map:
		return operator_map[condition](val1, val2)

	return False


def get_filter(doctype: str, f: dict | list | tuple, filters_config=None) -> "frappe._dict":
	"""Returns a _dict like

	{
	        "doctype":
	        "fieldname":
	        "operator":
	        "value":
	        "fieldtype":
	}
	"""
	from frappe.database.utils import NestedSetHierarchy
	from frappe.model import child_table_fields, default_fields, optional_fields

	if isinstance(f, dict):
		key, value = next(iter(f.items()))
		f = make_filter_tuple(doctype, key, value)

	if not isinstance(f, (list, tuple)):
		frappe.throw(frappe._("Filter must be a tuple or list (in a list)"))

	if len(f) == 3:
		f = (doctype, f[0], f[1], f[2])
	elif len(f) > 4:
		f = f[0:4]
	elif len(f) != 4:
		frappe.throw(
			frappe._("Filter must have 4 values (doctype, fieldname, operator, value): {0}").format(str(f))
		)

	f = frappe._dict(doctype=f[0], fieldname=f[1], operator=f[2], value=f[3])

	sanitize_column(f.fieldname)

	if not f.operator:
		# if operator is missing
		f.operator = "="

	valid_operators = (
		"=",
		"!=",
		">",
		"<",
		">=",
		"<=",
		"like",
		"not like",
		"in",
		"not in",
		"is",
		"between",
		"timespan",
		"previous",
		"next",
	) + NestedSetHierarchy

	if filters_config:
		additional_operators = [key.lower() for key in filters_config]
		valid_operators = tuple(set(valid_operators + tuple(additional_operators)))

	if f.operator.lower() not in valid_operators:
		frappe.throw(frappe._("Operator must be one of {0}").format(", ".join(valid_operators)))

	if f.doctype and (f.fieldname not in default_fields + optional_fields + child_table_fields):
		# verify fieldname belongs to the doctype
		meta = frappe.get_meta(f.doctype)
		if not meta.has_field(f.fieldname):

			# try and match the doctype name from child tables
			for df in meta.get_table_fields():
				if frappe.get_meta(df.options).has_field(f.fieldname):
					f.doctype = df.options
					break

	try:
		df = frappe.get_meta(f.doctype).get_field(f.fieldname)
	except frappe.exceptions.DoesNotExistError:
		df = None

	f.fieldtype = df.fieldtype if df else None

	return f


def make_filter_tuple(doctype, key, value):
	"""return a filter tuple like [doctype, key, operator, value]"""
	if isinstance(value, (list, tuple)):
		return [doctype, key, value[0], value[1]]
	else:
		return [doctype, key, "=", value]


def make_filter_dict(filters):
	"""convert this [[doctype, key, operator, value], ..]
	to this { key: (operator, value), .. }
	"""
	_filter = frappe._dict()
	for f in filters:
		_filter[f[1]] = (f[2], f[3])

	return _filter


def sanitize_column(column_name: str) -> None:
	import sqlparse

	from frappe import _

	column_name = sqlparse.format(column_name, strip_comments=True, keyword_case="lower")
	if frappe.db and frappe.db.db_type == "mariadb":
		# strip mariadb specific comments which are like python single line comments
		column_name = MARIADB_SPECIFIC_COMMENT.sub("", column_name)

	blacklisted_keywords = [
		"select",
		"create",
		"insert",
		"delete",
		"drop",
		"update",
		"case",
		"and",
		"or",
	]

	def _raise_exception():
		frappe.throw(_("Invalid field name {0}").format(column_name), frappe.DataError)

	regex = re.compile("^.*[,'();].*")
	if "ifnull" in column_name:
		if regex.match(column_name):
			# to avoid and, or
			if any(f" {keyword} " in column_name.split() for keyword in blacklisted_keywords):
				_raise_exception()

			# to avoid select, delete, drop, update and case
			elif any(keyword in column_name.split() for keyword in blacklisted_keywords):
				_raise_exception()

	elif regex.match(column_name):
		_raise_exception()


def scrub_urls(html: str) -> str:
	return expand_relative_urls(html)


def expand_relative_urls(html: str) -> str:
	# expand relative urls
	url = get_url()
	if url.endswith("/"):
		url = url[:-1]

	def _expand_relative_urls(match):
		to_expand = list(match.groups())

		if not to_expand[2].startswith(("mailto", "data:", "tel:")):
			if not to_expand[2].startswith("/"):
				to_expand[2] = "/" + to_expand[2]
			to_expand.insert(2, url)

		if "url" in to_expand[0] and to_expand[1].startswith("(") and to_expand[-1].endswith(")"):
			# background-image: url('/assets/...') - workaround for wkhtmltopdf print-media-type
			to_expand.append(" !important")

		return "".join(to_expand)

	html = URLS_NOT_HTTP_TAG_PATTERN.sub(_expand_relative_urls, html)
	html = URL_NOTATION_PATTERN.sub(_expand_relative_urls, html)
	return html


def quoted(url: str) -> str:
	return cstr(quote(encode(cstr(url)), safe=b"~@#$&()*!+=:;,.?/'"))


def quote_urls(html: str) -> str:
	def _quote_url(match):
		groups = list(match.groups())
		groups[2] = quoted(groups[2])
		return "".join(groups)

	return URLS_HTTP_TAG_PATTERN.sub(_quote_url, html)


def unique(seq: typing.Sequence["T"]) -> list["T"]:
	"""use this instead of list(set()) to preserve order of the original list.
	Thanks to Stackoverflow: http://stackoverflow.com/questions/480214/how-do-you-remove-duplicates-from-a-list-in-python-whilst-preserving-order"""

	seen = set()
	seen_add = seen.add
	return [x for x in seq if not (x in seen or seen_add(x))]


def strip(val: str, chars: str | None = None) -> str:
	# \ufeff is no-width-break, \u200b is no-width-space
	return (val or "").replace("\ufeff", "").replace("\u200b", "").strip(chars)


def get_string_between(start: str, string: str, end: str) -> str:
	if not string:
		return ""

	out = re.search(f"{start}(.*){end}", string)

	return out.group(1) if out else string


def to_markdown(html: str) -> str:
	from html.parser import HTMLParser

	from frappe.core.utils import html2text

	try:
		return html2text(html or "")
	except HTMLParser.HTMLParseError:
		pass


def md_to_html(markdown_text: str) -> Optional["UnicodeWithAttrs"]:
	from markdown2 import MarkdownError
	from markdown2 import markdown as _markdown

	extras = {
		"fenced-code-blocks": None,
		"tables": None,
		"header-ids": None,
		"toc": None,
		"highlightjs-lang": None,
		"html-classes": {"table": "table table-bordered", "img": "screenshot"},
	}

	try:
		return UnicodeWithAttrs(_markdown(markdown_text or "", extras=extras))
	except MarkdownError:
		pass


def markdown(markdown_text):
	return md_to_html(markdown_text)


def is_subset(list_a: list, list_b: list) -> bool:
	"""Returns whether list_a is a subset of list_b"""
	return len(list(set(list_a) & set(list_b))) == len(list_a)


def generate_hash(*args, **kwargs) -> str:
	return frappe.generate_hash(*args, **kwargs)


def dict_with_keys(dict, keys):
	"""Returns a new dict with a subset of keys"""
	out = {}
	for key in dict:
		if key in keys:
			out[key] = dict[key]
	return out


def guess_date_format(date_string: str) -> str:
	DATE_FORMATS = [
		r"%d/%b/%y",
		r"%d-%m-%Y",
		r"%m-%d-%Y",
		r"%Y-%m-%d",
		r"%d-%m-%y",
		r"%m-%d-%y",
		r"%y-%m-%d",
		r"%y-%b-%d",
		r"%d/%m/%Y",
		r"%m/%d/%Y",
		r"%Y/%m/%d",
		r"%d/%m/%y",
		r"%m/%d/%y",
		r"%y/%m/%d",
		r"%d.%m.%Y",
		r"%m.%d.%Y",
		r"%Y.%m.%d",
		r"%d.%m.%y",
		r"%m.%d.%y",
		r"%y.%m.%d",
		r"%d %b %Y",
		r"%d %B %Y",
	]

	TIME_FORMATS = [
		r"%H:%M:%S.%f",
		r"%H:%M:%S",
		r"%H:%M",
		r"%I:%M:%S.%f %p",
		r"%I:%M:%S %p",
		r"%I:%M %p",
	]

	def _get_date_format(date_str):
		for f in DATE_FORMATS:
			try:
				# if date is parsed without any exception
				# capture the date format
				datetime.datetime.strptime(date_str, f)
				return f
			except ValueError:
				pass

	def _get_time_format(time_str):
		for f in TIME_FORMATS:
			try:
				# if time is parsed without any exception
				# capture the time format
				datetime.datetime.strptime(time_str, f)
				return f
			except ValueError:
				pass

	date_format = None
	time_format = None
	date_string = date_string.strip()

	# check if date format can be guessed
	date_format = _get_date_format(date_string)
	if date_format:
		return date_format

	# check if time format can be guessed
	time_format = _get_time_format(date_string)
	if time_format:
		return time_format

	# date_string doesnt look like date, it can have a time part too
	# split the date string into date and time parts
	if " " in date_string:
		date_str, time_str = date_string.split(" ", 1)

		date_format = _get_date_format(date_str) or ""
		time_format = _get_time_format(time_str) or ""

		if date_format and time_format:
			return (date_format + " " + time_format).strip()


def validate_json_string(string: str) -> None:
	try:
		json.loads(string)
	except (TypeError, ValueError):
		raise frappe.ValidationError


class _UserInfo(typing.TypedDict):
	email: str
	image: str | None
	name: str


def get_user_info_for_avatar(user_id: str) -> _UserInfo:
	try:
		user = frappe.get_cached_doc("User", user_id)
		return {"email": user.email, "image": user.user_image, "name": user.full_name}

	except frappe.DoesNotExistError:
		frappe.clear_last_message()
		return {"email": user_id, "image": "", "name": user_id}


def validate_python_code(
	string: str, fieldname: str | None = None, is_expression: bool = True
) -> None:
	"""Validate python code fields by using compile_command to ensure that expression is valid python.

	args:
	        fieldname: name of field being validated.
	        is_expression: true for validating simple single line python expression, else validated as script.
	"""

	if not string:
		return

	try:
		compile_command(string, symbol="eval" if is_expression else "exec")
	except SyntaxError as se:
		line_no = se.lineno - 1 or 0
		offset = se.offset - 1 or 0
		error_line = string if is_expression else string.split("\n")[line_no]
		msg = frappe._("{} Invalid python code on line {}").format(
			fieldname + ":" if fieldname else "", line_no + 1
		)
		msg += f"<br><pre>{error_line}</pre>"
		msg += f"<pre>{' ' * offset}^</pre>"

		frappe.throw(msg, title=frappe._("Syntax Error"))
	except Exception as e:
		frappe.msgprint(
			frappe._("{} Possibly invalid python code. <br>{}").format(fieldname + ": " or "", str(e)),
			indicator="orange",
		)


class UnicodeWithAttrs(str):
	def __init__(self, text):
		self.toc_html = text.toc_html
		self.metadata = text.metadata


def format_timedelta(o: datetime.timedelta) -> str:
	# mariadb allows a wide diff range - https://mariadb.com/kb/en/time/
	# but frappe doesnt - i think via babel : only allows 0..23 range for hour
	total_seconds = o.total_seconds()
	hours, remainder = divmod(total_seconds, 3600)
	minutes, seconds = divmod(remainder, 60)
	rounded_seconds = round(seconds, 6)
	int_seconds = int(seconds)

	if rounded_seconds == int_seconds:
		seconds = int_seconds
	else:
		seconds = rounded_seconds

	return f"{int(hours):01}:{int(minutes):02}:{seconds:02}"


def parse_timedelta(s: str) -> datetime.timedelta:
	# ref: https://stackoverflow.com/a/21074460/10309266
	if "day" in s:
		m = TIMEDELTA_DAY_PATTERN.match(s)
	else:
		m = TIMEDELTA_BASE_PATTERN.match(s)

	return datetime.timedelta(**{key: float(val) for key, val in m.groupdict().items()})


def get_job_name(key: str, doctype: str = None, doc_name: str = None) -> str:
	job_name = key
	if doctype:
		job_name += f"_{doctype}"
	if doc_name:
		job_name += f"_{doc_name}"
	return job_name


def get_imaginary_pixel_response():
	return {
		"type": "binary",
		"filename": "imaginary_pixel.png",
		"filecontent": (
			b"\x89PNG\r\n\x1a\n\x00\x00\x00\rIHDR\x00\x00\x00\x01\x00\x00"
			b"\x00\x01\x08\x06\x00\x00\x00\x1f\x15\xc4\x89\x00\x00\x00\r"
			b"IDATx\x9cc\xf8\xff\xff?\x03\x00\x08\xfc\x02\xfe\xa7\x9a\xa0"
			b"\xa0\x00\x00\x00\x00IEND\xaeB`\x82"
		),
	}


def is_site_link(link: str) -> bool:
	if link.startswith("/"):
		return True
	return urlparse(link).netloc == urlparse(frappe.utils.get_url()).netloc


def add_trackers_to_url(url: str, source: str, campaign: str, medium: str = "email") -> str:
	url_parts = list(urlparse(url))
	if url_parts[0] == "mailto":
		return url

	trackers = {
		"source": source,
		"medium": medium,
	}

	if campaign:
		trackers["campaign"] = campaign

	query = dict(parse_qsl(url_parts[4])) | trackers

	url_parts[4] = urlencode(query)
	return urlunparse(url_parts)


# This is used in test to count memory overhead of default imports.
def _get_rss_memory_usage():
	import psutil

	rss = psutil.Process().memory_info().rss // (1024 * 1024)
	return rss