# Copyright (c) 2015, Frappe Technologies Pvt. Ltd. and Contributors
# License: GNU General Public License v3. See license.txt

from __future__ import unicode_literals

import frappe, random
from frappe.utils.make_random import how_many, get_random
from frappe.desk import query_report
from erpnext.setup.utils import get_exchange_rate
from erpnext.accounts.party import get_party_account_currency
from erpnext.exceptions import InvalidCurrency
from erpnext.stock.doctype.material_request.material_request import make_request_for_quotation
from erpnext.buying.doctype.request_for_quotation.request_for_quotation import \
			 make_supplier_quotation as make_quotation_from_rfq

def work():
	frappe.set_user(frappe.db.get_global('demo_purchase_user'))

	if random.random() < 0.3:
		report = "Items To Be Requested"
		for row in query_report.run(report)["result"][:random.randint(1, 5)]:
			item_code, qty = row[0], abs(row[-1])

			mr = make_material_request(item_code, qty)

	if random.random() < 0.3:
		for mr in frappe.get_all('Material Request',
			filters={'material_request_type': 'Purchase', 'status': 'Open'},
			limit=random.randint(1,6)):
			print mr.name
			if not frappe.get_all('Request for Quotation',
				filters={'material_request': mr.name}, limit=1):
				rfq = make_request_for_quotation(mr.name)
				rfq.transaction_date = frappe.flags.current_date
				add_suppliers(rfq)
				rfq.save()
				rfq.submit()

	# Make suppier quotation from RFQ against each supplier.
	if random.random() < 0.3:
		for rfq in frappe.get_all('Request for Quotation',
			filters={'status': 'Open'}, limit=random.randint(1, 6)):
			if not frappe.get_all('Supplier Quotation',
				filters={'request_for_quotation': rfq.name}, limit=1):
				rfq = frappe.get_doc('Request for Quotation', rfq.name)

				for supplier in rfq.suppliers:
					supplier_quotation = make_quotation_from_rfq(rfq.name, supplier.supplier)
					supplier_quotation.save()
					supplier_quotation.submit()

	# get supplier details
	supplier = get_random("Supplier")

	company_currency = frappe.db.get_value("Company", "Wind Power LLC", "default_currency")
	party_account_currency = get_party_account_currency("Supplier", supplier, "Wind Power LLC")
	if company_currency == party_account_currency:
		exchange_rate = 1
	else:
		exchange_rate = get_exchange_rate(party_account_currency, company_currency)

	# make supplier quotations
	if random.random() < 0.2:
		from erpnext.stock.doctype.material_request.material_request import make_supplier_quotation

		report = "Material Requests for which Supplier Quotations are not created"
		for row in query_report.run(report)["result"][:random.randint(1, 3)]:
			if row[0] != "'Total'":
				sq = frappe.get_doc(make_supplier_quotation(row[0]))
				sq.transaction_date = frappe.flags.current_date
				sq.supplier = supplier
				sq.currency = party_account_currency or company_currency
				sq.conversion_rate = exchange_rate
				sq.insert()
				sq.submit()
				frappe.db.commit()

	# make purchase orders
	if random.random() < 0.3:
		from erpnext.stock.doctype.material_request.material_request import make_purchase_order
		report = "Requested Items To Be Ordered"
		for row in query_report.run(report)["result"][:how_many("Purchase Order")]:
			if row[0] != "'Total'":
				po = frappe.get_doc(make_purchase_order(row[0]))
				po.supplier = supplier
				po.currency = party_account_currency or company_currency
				po.conversion_rate = exchange_rate
				po.transaction_date = frappe.flags.current_date
				po.insert()
				po.submit()
				frappe.db.commit()

	if random.random() < 0.2:
		make_subcontract()

def make_material_request(item_code, qty):
	mr = frappe.new_doc("Material Request")

	variant_of = frappe.db.get_value('Item', item_code, 'variant_of') or item_code

	if frappe.db.get_value('BOM', {'item': variant_of, 'is_default': 1, 'is_active': 1}):
		mr.material_request_type = 'Manufacture'
	else:
		mr.material_request_type = "Purchase"

	mr.transaction_date = frappe.flags.current_date

	moq = frappe.db.get_value('Item', item_code, 'min_order_qty')

	mr.append("items", {
		"doctype": "Material Request Item",
		"schedule_date": frappe.utils.add_days(mr.transaction_date, 7),
		"item_code": item_code,
		"qty": qty if qty > moq else moq
	})
	mr.insert()
	mr.submit()
	return mr

def add_suppliers(rfq):
	for i in xrange(2):
		supplier = get_random("Supplier")
		if supplier not in [d.supplier for d in rfq.get('suppliers')]:
			rfq.append("suppliers", { "supplier": supplier })

def make_subcontract():
	from erpnext.buying.doctype.purchase_order.purchase_order import make_stock_entry

	# make sub-contract PO
	po = frappe.new_doc("Purchase Order")
	po.is_subcontracted = "Yes"
	po.supplier = get_random("Supplier")

	item_code = get_random("Item", {"is_sub_contracted_item": 1})
	moq = frappe.db.get_value('Item', item_code, 'min_order_qty')

	po.append("items", {
		"item_code": item_code,
		"schedule_date": frappe.utils.add_days(frappe.flags.current_date, 7),
		"qty": moq
	})
	po.set_missing_values()
	try:
		po.insert()
	except InvalidCurrency:
		return

	po.submit()

	# make material request for
	make_material_request(po.items[0].item_code, po.items[0].qty)

	# transfer material for sub-contract
	stock_entry = frappe.get_doc(make_stock_entry(po.name, po.items[0].item_code))
	stock_entry.from_warehouse = "Stores - WPL"
	stock_entry.to_warehouse = "Supplier - WPL"
	stock_entry.insert()