# Copyright (c) 2013, Web Notes Technologies Pvt. Ltd. and Contributors
# License: GNU General Public License v3. See license.txt

from __future__ import unicode_literals
import frappe

def execute(filters=None):
	columns = get_columns()
	sl_entries = get_stock_ledger_entries(filters)
	item_details = get_item_details(filters)

	data = []
	for sle in sl_entries:
		item_detail = item_details[sle.item_code]
		voucher_link_icon = """<a href="%s"><i class="icon icon-share"
			style="cursor: pointer;"></i></a>""" \
			% ("/".join(["#Form", sle.voucher_type, sle.voucher_no]),)

		data.append([sle.date, sle.item_code, item_detail.item_name, item_detail.item_group,
			item_detail.brand, item_detail.description, sle.warehouse,
			item_detail.stock_uom, sle.actual_qty, sle.qty_after_transaction,
			(sle.incoming_rate if sle.actual_qty > 0 else 0.0),
			sle.valuation_rate, sle.stock_value, sle.voucher_type, sle.voucher_no,
			voucher_link_icon, sle.batch_no, sle.serial_no, sle.company])

	return columns, data

def get_columns():
	return ["Date:Datetime:95", "Item:Link/Item:130", "Item Name::100", "Item Group:Link/Item Group:100",
		"Brand:Link/Brand:100", "Description::200", "Warehouse:Link/Warehouse:100",
		"Stock UOM:Link/UOM:100", "Qty:Float:50", "Balance Qty:Float:100",
		"Incoming Rate:Currency:110", "Valuation Rate:Currency:110", "Balance Value:Currency:110",
		"Voucher Type::110", "Voucher #::100", "Link::30", "Batch:Link/Batch:100",
		"Serial #:Link/Serial No:100", "Company:Link/Company:100"]

def get_stock_ledger_entries(filters):
	return frappe.db.sql("""select concat_ws(" ", posting_date, posting_time) as date,
			item_code, warehouse, actual_qty, qty_after_transaction, incoming_rate, valuation_rate,
			stock_value, voucher_type, voucher_no, batch_no, serial_no, company
		from `tabStock Ledger Entry`
		where company = %(company)s and
			posting_date between %(from_date)s and %(to_date)s
			{sle_conditions}
			order by posting_date desc, posting_time desc, name desc"""\
		.format(sle_conditions=get_sle_conditions(filters)), filters, as_dict=1)

def get_item_details(filters):
	item_details = {}
	for item in frappe.db.sql("""select name, item_name, description, item_group,
			brand, stock_uom from `tabItem` {item_conditions}"""\
			.format(item_conditions=get_item_conditions(filters)), filters, as_dict=1):
		item_details.setdefault(item.name, item)

	return item_details

def get_item_conditions(filters):
	conditions = []
	if filters.get("item_code"):
		conditions.append("name=%(item_code)s")
	if filters.get("brand"):
		conditions.append("brand=%(brand)s")

	return "where {}".format(" and ".join(conditions)) if conditions else ""

def get_sle_conditions(filters):
	conditions = []
	item_conditions=get_item_conditions(filters)
	if item_conditions:
		conditions.append("""item_code in (select name from tabItem
			{item_conditions})""".format(item_conditions=item_conditions))
	if filters.get("warehouse"):
		conditions.append("warehouse=%(warehouse)s")
	if filters.get("voucher_no"):
		conditions.append("voucher_no=%(voucher_no)s")

	return "and {}".format(" and ".join(conditions)) if conditions else ""