# 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
from frappe.utils.make_random import get_random
from erpnext.assets.doctype.asset.asset import make_purchase_invoice, make_sales_invoice
from erpnext.assets.doctype.asset.depreciation import post_depreciation_entries, scrap_asset

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

	asset_list = make_asset_purchase_entry()

	if not asset_list:
		# fixed_asset.work() already run
		return
		
	# Enable booking asset depreciation entry automatically
	frappe.db.set_value("Accounts Settings", None, "book_asset_depreciation_entry_automatically", 1)
		
	# post depreciation entries as on today
	post_depreciation_entries()
	
	# scrap a random asset
	frappe.db.set_value("Company", "Wind Power LLC", "disposal_account", "Gain/Loss on Asset Disposal - WPL")
	
	asset = get_random_asset()
	scrap_asset(asset.name)
	
	# Sell a random asset
	sell_an_asset()	

def make_asset_purchase_entry():
	asset_list = frappe.get_all("Asset", filters={"purchase_invoice": ["in", ("", None)]}, 
		fields=["name", "item_code", "gross_purchase_amount", "company", "purchase_date"])
				
	# make purchase invoice
	for asset in asset_list:
		pi = make_purchase_invoice(asset.name, asset.item_code, asset.gross_purchase_amount, 
			asset.company, asset.purchase_date)
		pi.supplier = get_random("Supplier")
		pi.save()
		pi.submit()
		
	return asset_list

def sell_an_asset():
	asset = get_random_asset()
	si = make_sales_invoice(asset.name, asset.item_code, "Wind Power LLC")
	si.customer = get_random("Customer")
	si.get("items")[0].rate = asset.value_after_depreciation * 0.8 \
		if asset.value_after_depreciation else asset.gross_purchase_amount * 0.9
	si.save()
	si.submit()
	
def get_random_asset():
	return frappe.db.sql(""" select name, item_code, value_after_depreciation, gross_purchase_amount
		from `tabAsset` 
		where docstatus=1 and status not in ("Scrapped", "Sold") order by rand() limit 1""", as_dict=1)[0]