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

import frappe, os
import frappe.model
from frappe.modules import scrub, get_module_path, scrub_dt_dn

def export_doc(doc):
	write_document_file(doc)

def export_to_files(record_list=None, record_module=None, verbose=0, create_init=None):
	"""
		Export record_list to files. record_list is a list of lists ([doctype, docname, folder name],)  ,
	"""
	if frappe.flags.in_import:
		return

	if record_list:
		for record in record_list:
			folder_name = record[2] if len(record) == 3 else None
			write_document_file(frappe.get_doc(record[0], record[1]), record_module, create_init=create_init, folder_name=folder_name)

def write_document_file(doc, record_module=None, create_init=True, folder_name=None):
	doc_export = doc.as_dict(no_nulls=True)
	doc.run_method("before_export", doc_export)

	doc_export = strip_default_fields(doc, doc_export)
	module = record_module or get_module_name(doc)

	# create folder
	if folder_name:
		folder = create_folder(module, folder_name, doc.name, create_init)
	else:
		folder = create_folder(module, doc.doctype, doc.name, create_init)

	fname = scrub(doc.name)
	write_code_files(folder, fname, doc, doc_export)

	# write the data file
	with open(os.path.join(folder, fname + ".json"), 'w+') as txtfile:
		txtfile.write(frappe.as_json(doc_export))

def strip_default_fields(doc, doc_export):
	# strip out default fields from children
	if doc.doctype == "DocType" and doc.migration_hash:
		del doc_export["migration_hash"]

	for df in doc.meta.get_table_fields():
		for d in doc_export.get(df.fieldname):
			for fieldname in frappe.model.default_fields:
				if fieldname in d:
					del d[fieldname]

	return doc_export

def write_code_files(folder, fname, doc, doc_export):
	'''Export code files and strip from values'''
	if hasattr(doc, 'get_code_fields'):
		for key, extn in doc.get_code_fields().items():
			if doc.get(key):
				with open(os.path.join(folder, fname + "." + extn), 'w+') as txtfile:
					txtfile.write(doc.get(key))

				# remove from exporting
				del doc_export[key]

def get_module_name(doc):
	if doc.doctype  == 'Module Def':
		module = doc.name
	elif doc.doctype=="Workflow":
		module = frappe.db.get_value("DocType", doc.document_type, "module")
	elif hasattr(doc, 'module'):
		module = doc.module
	else:
		module = frappe.db.get_value("DocType", doc.doctype, "module")

	return module

def create_folder(module, dt, dn, create_init):
	if frappe.db.get_value('Module Def', module, 'custom'):
		module_path = get_custom_module_path(module)
	else:
		module_path = get_module_path(module)

	dt, dn = scrub_dt_dn(dt, dn)

	# create folder
	folder = os.path.join(module_path, dt, dn)

	frappe.create_folder(folder)

	# create init_py_files
	if create_init:
		create_init_py(module_path, dt, dn)

	return folder

def get_custom_module_path(module):
	package = frappe.db.get_value('Module Def', module, 'package')
	if not package:
		frappe.throw('Package must be set for custom Module <b>{module}</b>'.format(module=module))

	path = os.path.join(get_package_path(package), scrub(module))
	if not os.path.exists(path):
		os.makedirs(path)

	return path

def get_package_path(package):
	path = os.path.join(frappe.get_site_path('packages'), frappe.db.get_value('Package', package, 'package_name'))
	if not os.path.exists(path):
		os.makedirs(path)
	return path

def create_init_py(module_path, dt, dn):
	def create_if_not_exists(path):
		initpy = os.path.join(path, '__init__.py')
		if not os.path.exists(initpy):
			open(initpy, 'w').close()

	create_if_not_exists(os.path.join(module_path))
	create_if_not_exists(os.path.join(module_path, dt))
	create_if_not_exists(os.path.join(module_path, dt, dn))