# Copyright (c) 2017, Frappe and Contributors
# License: GNU General Public License v3. See license.txt

from __future__ import unicode_literals
import frappe

parentfield = {
	'item_code': 'items',
	'item_group': 'item_groups',
	'brand': 'brands'
}

def execute():

	if not frappe.get_all('Pricing Rule', limit=1):
		return

	frappe.reload_doc('accounts', 'doctype', 'pricing_rule_detail')
	doctypes = {'Supplier Quotation': 'buying', 'Purchase Order': 'buying', 'Purchase Invoice': 'accounts',
		'Purchase Receipt': 'stock', 'Quotation': 'selling', 'Sales Order': 'selling',
		'Sales Invoice': 'accounts', 'Delivery Note': 'stock'}

	for doctype, module in doctypes.items():
		frappe.reload_doc(module, 'doctype', frappe.scrub(doctype))

		child_doc = frappe.scrub(doctype) + '_item'
		frappe.reload_doc(module, 'doctype', child_doc, force=True)

		child_doctype = doctype + ' Item'

		frappe.db.sql(""" UPDATE `tab{child_doctype}` SET pricing_rules = pricing_rule
			WHERE docstatus < 2 and pricing_rule is not null and pricing_rule != ''
		""".format(child_doctype= child_doctype))

		data = frappe.db.sql(""" SELECT pricing_rule, name, parent,
				parenttype, creation, modified, docstatus, modified_by, owner, name
			FROM `tab{child_doc}` where docstatus < 2 and pricing_rule is not null
			and pricing_rule != ''""".format(child_doc=child_doctype), as_dict=1)

		values = []
		for d in data:
			values.append((d.pricing_rule, d.name, d.parent, 'pricing_rules', d.parenttype,
				d.creation, d.modified, d.docstatus, d.modified_by, d.owner, frappe.generate_hash("", 10)))

		if values:
			frappe.db.sql(""" INSERT INTO
				`tabPricing Rule Detail` (`pricing_rule`, `child_docname`, `parent`, `parentfield`, `parenttype`,
				`creation`, `modified`, `docstatus`, `modified_by`, `owner`, `name`)
			VALUES {values} """.format(values=', '.join(['%s'] * len(values))), tuple(values))

	frappe.reload_doc('accounts', 'doctype', 'pricing_rule')

	for doctype, apply_on in {'Pricing Rule Item Code': 'Item Code',
		'Pricing Rule Item Group': 'Item Group', 'Pricing Rule Brand': 'Brand'}.items():
		frappe.reload_doc('accounts', 'doctype', frappe.scrub(doctype))

		field = frappe.scrub(apply_on)
		data = frappe.get_all('Pricing Rule', fields=[field, "name", "creation", "modified",
			"owner", "modified_by"], filters= {'apply_on': apply_on})

		values = []
		for d in data:
			values.append((d.get(field), d.name, parentfield.get(field), 'Pricing Rule',
				d.creation, d.modified, d.owner, d.modified_by, frappe.generate_hash("", 10)))

		if values:
			frappe.db.sql(""" INSERT INTO
				`tab{doctype}` ({field}, parent, parentfield, parenttype, creation, modified,
					owner, modified_by, name)
			VALUES {values} """.format(doctype=doctype,
				field=field, values=', '.join(['%s'] * len(values))), tuple(values))
