# Copyright (c) 2015, Frappe Technologies Pvt. Ltd. and Contributors
# MIT License. See license.txt

# called from wnf.py
# lib/wnf.py --install [rootpassword] [dbname] [source]

from __future__ import unicode_literals, print_function

from six.moves import input

import os, json, subprocess, shutil
import click
import frappe
import frappe.database
import importlib
from frappe import _
from frappe.model.sync import sync_for
from frappe.utils.fixtures import sync_fixtures
from frappe.website import render
from frappe.modules.utils import sync_customizations
from frappe.database import setup_database
from frappe.core.doctype.scheduled_job_type.scheduled_job_type import sync_jobs

def install_db(root_login="root", root_password=None, db_name=None, source_sql=None,
			   admin_password=None, verbose=True, force=0, site_config=None, reinstall=False,
			   db_password=None, db_type=None, db_host=None, db_port=None, no_mariadb_socket=False):

	if not db_type:
		db_type = frappe.conf.db_type or 'mariadb'

	make_conf(db_name, site_config=site_config, db_password=db_password, db_type=db_type, db_host=db_host, db_port=db_port)
	frappe.flags.in_install_db = True

	frappe.flags.root_login = root_login
	frappe.flags.root_password = root_password
	setup_database(force, source_sql, verbose, no_mariadb_socket)

	frappe.conf.admin_password = frappe.conf.admin_password or admin_password

	remove_missing_apps()

	frappe.db.create_auth_table()
	frappe.db.create_global_search_table()
	frappe.db.create_user_settings_table()

	frappe.flags.in_install_db = False

def install_app(name, verbose=False, set_as_patched=True):
	frappe.flags.in_install = name
	frappe.flags.ignore_in_install = False

	frappe.clear_cache()
	app_hooks = frappe.get_hooks(app_name=name)
	installed_apps = frappe.get_installed_apps()

	# install pre-requisites
	if app_hooks.required_apps:
		for app in app_hooks.required_apps:
			install_app(app, verbose=verbose)

	frappe.flags.in_install = name
	frappe.clear_cache()

	if name not in frappe.get_all_apps():
		raise Exception("App not in apps.txt")

	if name in installed_apps:
		frappe.msgprint(_("App {0} already installed").format(name))
		return

	print("\nInstalling {0}...".format(name))

	if name != "frappe":
		frappe.only_for("System Manager")

	for before_install in app_hooks.before_install or []:
		out = frappe.get_attr(before_install)()
		if out==False:
			return

	if name != "frappe":
		add_module_defs(name)

	sync_for(name, force=True, sync_everything=True, verbose=verbose, reset_permissions=True)

	add_to_installed_apps(name)

	frappe.get_doc('Portal Settings', 'Portal Settings').sync_menu()

	if set_as_patched:
		set_all_patches_as_completed(name)

	for after_install in app_hooks.after_install or []:
		frappe.get_attr(after_install)()

	sync_jobs()
	sync_fixtures(name)
	sync_customizations(name)

	for after_sync in app_hooks.after_sync or []:
		frappe.get_attr(after_sync)() #

	frappe.flags.in_install = False

def add_to_installed_apps(app_name, rebuild_website=True):
	installed_apps = frappe.get_installed_apps()
	if not app_name in installed_apps:
		installed_apps.append(app_name)
		frappe.db.set_global("installed_apps", json.dumps(installed_apps))
		frappe.db.commit()
		post_install(rebuild_website)

def remove_from_installed_apps(app_name):
	installed_apps = frappe.get_installed_apps()
	if app_name in installed_apps:
		installed_apps.remove(app_name)
		frappe.db.set_value("DefaultValue", {"defkey": "installed_apps"}, "defvalue", json.dumps(installed_apps))
		frappe.db.commit()
		if frappe.flags.in_install:
			post_install()

def remove_app(app_name, dry_run=False, yes=False, no_backup=False, force=False):
	"""Remove app and all linked to the app's module with the app from a site."""

	# dont allow uninstall app if not installed unless forced
	if not force:
		if app_name not in frappe.get_installed_apps():
			click.secho("App {0} not installed on Site {1}".format(app_name, frappe.local.site), fg="yellow")
			return

	print("Uninstalling App {0} from Site {1}...".format(app_name, frappe.local.site))

	if not dry_run and not yes:
		confirm = click.confirm("All doctypes (including custom), modules related to this app will be deleted. Are you sure you want to continue?")
		if not confirm:
			return

	if not no_backup:
		from frappe.utils.backups import scheduled_backup
		print("Backing up...")
		scheduled_backup(ignore_files=True)

	frappe.flags.in_uninstall = True
	drop_doctypes = []

	# remove modules, doctypes, roles
	for module_name in frappe.get_module_list(app_name):
		for doctype in frappe.get_list("DocType", filters={"module": module_name},
			fields=["name", "issingle"]):
			print("removing DocType {0}...".format(doctype.name))

			if not dry_run:
				frappe.delete_doc("DocType", doctype.name)

				if not doctype.issingle:
					drop_doctypes.append(doctype.name)


		linked_doctypes = frappe.get_all("DocField", filters={"fieldtype": "Link", "options": "Module Def"}, fields=['parent'])
		ordered_doctypes = ["Desk Page", "Report", "Page", "Web Form"]
		doctypes_with_linked_modules = ordered_doctypes + [doctype.parent for doctype in linked_doctypes if doctype.parent not in ordered_doctypes]

		for doctype in doctypes_with_linked_modules:
			for record in frappe.get_list(doctype, filters={"module": module_name}):
				print("removing {0} {1}...".format(doctype, record.name))
				if not dry_run:
					frappe.delete_doc(doctype, record.name)

		print("removing Module {0}...".format(module_name))
		if not dry_run:
			frappe.delete_doc("Module Def", module_name)

	remove_from_installed_apps(app_name)

	if not dry_run:
		# drop tables after a commit
		frappe.db.commit()

		for doctype in set(drop_doctypes):
			frappe.db.sql("drop table `tab{0}`".format(doctype))

		click.secho("Uninstalled App {0} from Site {1}".format(app_name, frappe.local.site), fg="green")

	frappe.flags.in_uninstall = False

def post_install(rebuild_website=False):
	if rebuild_website:
		render.clear_cache()

	init_singles()
	frappe.db.commit()
	frappe.clear_cache()

def set_all_patches_as_completed(app):
	patch_path = os.path.join(frappe.get_pymodule_path(app), "patches.txt")
	if os.path.exists(patch_path):
		for patch in frappe.get_file_items(patch_path):
			frappe.get_doc({
				"doctype": "Patch Log",
				"patch": patch
			}).insert(ignore_permissions=True)
		frappe.db.commit()

def init_singles():
	singles = [single['name'] for single in frappe.get_all("DocType", filters={'issingle': True})]
	for single in singles:
		if not frappe.db.get_singles_dict(single):
			doc = frappe.new_doc(single)
			doc.flags.ignore_mandatory=True
			doc.flags.ignore_validate=True
			doc.save()

def make_conf(db_name=None, db_password=None, site_config=None, db_type=None, db_host=None, db_port=None):
	site = frappe.local.site
	make_site_config(db_name, db_password, site_config, db_type=db_type, db_host=db_host, db_port=db_port)
	sites_path = frappe.local.sites_path
	frappe.destroy()
	frappe.init(site, sites_path=sites_path)

def make_site_config(db_name=None, db_password=None, site_config=None, db_type=None, db_host=None, db_port=None):
	frappe.create_folder(os.path.join(frappe.local.site_path))
	site_file = get_site_config_path()

	if not os.path.exists(site_file):
		if not (site_config and isinstance(site_config, dict)):
			site_config = get_conf_params(db_name, db_password)

			if db_type:
				site_config['db_type'] = db_type

			if db_host:
				site_config['db_host'] = db_host

			if db_port:
				site_config['db_port'] = db_port

		with open(site_file, "w") as f:
			f.write(json.dumps(site_config, indent=1, sort_keys=True))

def update_site_config(key, value, validate=True, site_config_path=None):
	"""Update a value in site_config"""
	if not site_config_path:
		site_config_path = get_site_config_path()

	with open(site_config_path, "r") as f:
		site_config = json.loads(f.read())

	# In case of non-int value
	if value in ('0', '1'):
		value = int(value)

	# boolean
	if value == 'false': value = False
	if value == 'true': value = True

	# remove key if value is None
	if value == "None":
		if key in site_config:
			del site_config[key]
	else:
		site_config[key] = value

	with open(site_config_path, "w") as f:
		f.write(json.dumps(site_config, indent=1, sort_keys=True))

	if hasattr(frappe.local, "conf"):
		frappe.local.conf[key] = value

def get_site_config_path():
	return os.path.join(frappe.local.site_path, "site_config.json")

def get_conf_params(db_name=None, db_password=None):
	if not db_name:
		db_name = input("Database Name: ")
		if not db_name:
			raise Exception("Database Name Required")

	if not db_password:
		from frappe.utils import random_string
		db_password = random_string(16)

	return {"db_name": db_name, "db_password": db_password}

def make_site_dirs():
	site_public_path = os.path.join(frappe.local.site_path, 'public')
	site_private_path = os.path.join(frappe.local.site_path, 'private')
	for dir_path in (
			os.path.join(site_private_path, 'backups'),
			os.path.join(site_public_path, 'files'),
			os.path.join(site_private_path, 'files'),
			os.path.join(frappe.local.site_path, 'logs'),
			os.path.join(frappe.local.site_path, 'task-logs')):
		if not os.path.exists(dir_path):
			os.makedirs(dir_path)
	locks_dir = frappe.get_site_path('locks')
	if not os.path.exists(locks_dir):
			os.makedirs(locks_dir)

def add_module_defs(app):
	modules = frappe.get_module_list(app)
	for module in modules:
		d = frappe.new_doc("Module Def")
		d.app_name = app
		d.module_name = module
		d.save(ignore_permissions=True)

def remove_missing_apps():
	apps = ('frappe_subscription', 'shopping_cart')
	installed_apps = json.loads(frappe.db.get_global("installed_apps") or "[]")
	for app in apps:
		if app in installed_apps:
			try:
				importlib.import_module(app)

			except ImportError:
				installed_apps.remove(app)
				frappe.db.set_global("installed_apps", json.dumps(installed_apps))

def extract_sql_gzip(sql_gz_path):
	try:
		# dvf - decompress, verbose, force
		original_file = sql_gz_path
		decompressed_file = original_file.rstrip(".gz")
		cmd = 'gzip -dvf < {0} > {1}'.format(original_file, decompressed_file)
		subprocess.check_call(cmd, shell=True)
	except:
		raise

	return decompressed_file

def extract_tar_files(site_name, file_path, folder_name):
	# Need to do frappe.init to maintain the site locals
	frappe.init(site=site_name)
	abs_site_path = os.path.abspath(frappe.get_site_path())

	# Copy the files to the parent directory and extract
	shutil.copy2(os.path.abspath(file_path), abs_site_path)

	# Get the file name splitting the file path on
	tar_name = os.path.split(file_path)[1]
	tar_path = os.path.join(abs_site_path, tar_name)

	try:
		subprocess.check_output(['tar', 'xvf', tar_path, '--strip', '2'], cwd=abs_site_path)
	except:
		raise
	finally:
		frappe.destroy()

	return tar_path

def is_downgrade(sql_file_path, verbose=False):
	"""checks if input db backup will get downgraded on current bench"""
	from semantic_version import Version
	head = "INSERT INTO `tabInstalled Application` VALUES"

	with open(sql_file_path) as f:
		for line in f:
			if head in line:
				# 'line' (str) format: ('2056588823','2020-05-11 18:21:31.488367','2020-06-12 11:49:31.079506','Administrator','Administrator',0,'Installed Applications','installed_applications','Installed Applications',1,'frappe','v10.1.71-74 (3c50d5e) (v10.x.x)','v10.x.x'),('855c640b8e','2020-05-11 18:21:31.488367','2020-06-12 11:49:31.079506','Administrator','Administrator',0,'Installed Applications','installed_applications','Installed Applications',2,'your_custom_app','0.0.1','master')
				line = line.strip().lstrip(head).rstrip(";").strip()
				# 'all_apps' (list) format: [('frappe', '12.x.x-develop ()', 'develop'), ('your_custom_app', '0.0.1', 'master')]
				all_apps = [ x[-3:] for x in frappe.safe_eval(line) ]

				for app in all_apps:
					app_name = app[0]
					app_version = app[1].split(" ")[0]

					if app_name == "frappe":
						try:
							current_version = Version(frappe.__version__)
							backup_version = Version(app_version[1:] if app_version[0] == "v" else app_version)
						except ValueError:
							return False

						downgrade = backup_version > current_version

						if verbose and downgrade:
							print("Your site will be downgraded from Frappe {0} to {1}".format(current_version, backup_version))

						return downgrade