# 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
from frappe.widgets.reportview import get_match_cond
from frappe.model.db_query import DatabaseQuery
from frappe.utils import nowdate

def get_filters_cond(doctype, filters, conditions):
	if filters:
		if isinstance(filters, dict):
			filters = filters.items()
			flt = []
			for f in filters:
				if isinstance(f[1], basestring) and f[1][0] == '!':
					flt.append([doctype, f[0], '!=', f[1][1:]])
				else:
					flt.append([doctype, f[0], '=', f[1]])

		query = DatabaseQuery(doctype)
		query.filters = flt
		query.conditions = conditions
		query.build_filter_conditions(flt, conditions)

		cond = ' and ' + ' and '.join(query.conditions)
	else:
		cond = ''
	return cond

 # searches for active employees
def employee_query(doctype, txt, searchfield, start, page_len, filters):
	return frappe.db.sql("""select name, employee_name from `tabEmployee`
		where status = 'Active'
			and docstatus < 2
			and ({key} like %(txt)s
				or employee_name like %(txt)s)
			{mcond}
		order by
			if(locate(%(_txt)s, name), locate(%(_txt)s, name), 99999),
			if(locate(%(_txt)s, employee_name), locate(%(_txt)s, employee_name), 99999),
			name, employee_name
		limit %(start)s, %(page_len)s""".format(**{
			'key': searchfield,
			'mcond': get_match_cond(doctype)
		}), {
			'txt': "%%%s%%" % txt,
			'_txt': txt.replace("%", ""),
			'start': start,
			'page_len': page_len
		})

 # searches for leads which are not converted
def lead_query(doctype, txt, searchfield, start, page_len, filters):
	return frappe.db.sql("""select name, lead_name, company_name from `tabLead`
		where docstatus < 2
			and ifnull(status, '') != 'Converted'
			and ({key} like %(txt)s
				or lead_name like %(txt)s
				or company_name like %(txt)s)
			{mcond}
		order by
			if(locate(%(_txt)s, name), locate(%(_txt)s, name), 99999),
			if(locate(%(_txt)s, lead_name), locate(%(_txt)s, lead_name), 99999),
			if(locate(%(_txt)s, company_name), locate(%(_txt)s, company_name), 99999),
			name, lead_name
		limit %(start)s, %(page_len)s""".format(**{
			'key': searchfield,
			'mcond':get_match_cond(doctype)
		}), {
			'txt': "%%%s%%" % txt,
			'_txt': txt.replace("%", ""),
			'start': start,
			'page_len': page_len
		})

 # searches for customer
def customer_query(doctype, txt, searchfield, start, page_len, filters):
	cust_master_name = frappe.defaults.get_user_default("cust_master_name")

	if cust_master_name == "Customer Name":
		fields = ["name", "customer_group", "territory"]
	else:
		fields = ["name", "customer_name", "customer_group", "territory"]

	fields = ", ".join(fields)

	return frappe.db.sql("""select {fields} from `tabCustomer`
		where docstatus < 2
			and ({key} like %(txt)s
				or customer_name like %(txt)s)
			{mcond}
		order by
			if(locate(%(_txt)s, name), locate(%(_txt)s, name), 99999),
			if(locate(%(_txt)s, customer_name), locate(%(_txt)s, customer_name), 99999),
			name, customer_name
		limit %(start)s, %(page_len)s""".format(**{
			"fields": fields,
			"key": searchfield,
			"mcond": get_match_cond(doctype)
		}), {
			'txt': "%%%s%%" % txt,
			'_txt': txt.replace("%", ""),
			'start': start,
			'page_len': page_len
		})

# searches for supplier
def supplier_query(doctype, txt, searchfield, start, page_len, filters):
	supp_master_name = frappe.defaults.get_user_default("supp_master_name")
	if supp_master_name == "Supplier Name":
		fields = ["name", "supplier_type"]
	else:
		fields = ["name", "supplier_name", "supplier_type"]
	fields = ", ".join(fields)

	return frappe.db.sql("""select {field} from `tabSupplier`
		where docstatus < 2
			and ({key} like %(txt)s
				or supplier_name like %(txt)s)
			{mcond}
		order by
			if(locate(%(_txt)s, name), locate(%(_txt)s, name), 99999),
			if(locate(%(_txt)s, supplier_name), locate(%(_txt)s, supplier_name), 99999),
			name, supplier_name
		limit %(start)s, %(page_len)s """.format(**{
			'field': fields,
			'key': searchfield,
			'mcond':get_match_cond(doctype)
		}), {
			'txt': "%%%s%%" % txt,
			'_txt': txt.replace("%", ""),
			'start': start,
			'page_len': page_len
		})

def tax_account_query(doctype, txt, searchfield, start, page_len, filters):
	tax_accounts = frappe.db.sql("""select name, parent_account	from tabAccount
		where tabAccount.docstatus!=2
			and account_type in (%s)
			and group_or_ledger = 'Ledger'
			and company = %s
			and `%s` LIKE %s
		limit %s, %s""" %
		(", ".join(['%s']*len(filters.get("account_type"))), "%s", searchfield, "%s", "%s", "%s"),
		tuple(filters.get("account_type") + [filters.get("company"), "%%%s%%" % txt,
			start, page_len]))
	if not tax_accounts:
		tax_accounts = frappe.db.sql("""select name, parent_account	from tabAccount
			where tabAccount.docstatus!=2 and group_or_ledger = 'Ledger'
				and company = %s and `%s` LIKE %s limit %s, %s"""
			% ("%s", searchfield, "%s", "%s", "%s"),
			(filters.get("company"), "%%%s%%" % txt, start, page_len))

	return tax_accounts

def item_query(doctype, txt, searchfield, start, page_len, filters):
	conditions = []

	return frappe.db.sql("""select tabItem.name,
		if(length(tabItem.item_name) > 40,
			concat(substr(tabItem.item_name, 1, 40), "..."), item_name) as item_name,
		if(length(tabItem.description) > 40, \
			concat(substr(tabItem.description, 1, 40), "..."), description) as decription
		from tabItem
		where tabItem.docstatus < 2
			and (tabItem.end_of_life > %(today)s or ifnull(tabItem.end_of_life, '0000-00-00')='0000-00-00')
			and (tabItem.`{key}` LIKE %(txt)s
				or tabItem.item_name LIKE %(txt)s
				or tabItem.description LIKE %(txt)s)
			{fcond} {mcond}
		order by
			if(locate(%(_txt)s, name), locate(%(_txt)s, name), 99999),
			if(locate(%(_txt)s, item_name), locate(%(_txt)s, item_name), 99999),
			name, item_name
		limit %(start)s, %(page_len)s """.format(key=searchfield,
			fcond=get_filters_cond(doctype, filters, conditions),
			mcond=get_match_cond(doctype)),
			{
				"today": nowdate(),
				"txt": "%%%s%%" % txt,
				"_txt": txt.replace("%", ""),
				"start": start,
				"page_len": page_len
			})

def bom(doctype, txt, searchfield, start, page_len, filters):
	conditions = []

	return frappe.db.sql("""select tabBOM.name, tabBOM.item
		from tabBOM
		where tabBOM.docstatus=1
			and tabBOM.is_active=1
			and tabBOM.%(key)s like "%(txt)s"
			%(fcond)s  %(mcond)s
		limit %(start)s, %(page_len)s """ %  {'key': searchfield, 'txt': "%%%s%%" % txt,
		'fcond': get_filters_cond(doctype, filters, conditions),
		'mcond':get_match_cond(doctype), 'start': start, 'page_len': page_len})

def get_project_name(doctype, txt, searchfield, start, page_len, filters):
	cond = ''
	if filters.get('customer'):
		cond = '(`tabProject`.customer = "' + filters['customer'] + '" or ifnull(`tabProject`.customer,"")="") and'

	return frappe.db.sql("""select `tabProject`.name from `tabProject`
		where `tabProject`.status not in ("Completed", "Cancelled")
			and %(cond)s `tabProject`.name like "%(txt)s" %(mcond)s
		order by `tabProject`.name asc
		limit %(start)s, %(page_len)s """ % {'cond': cond,'txt': "%%%s%%" % txt,
		'mcond':get_match_cond(doctype),'start': start, 'page_len': page_len})

def get_delivery_notes_to_be_billed(doctype, txt, searchfield, start, page_len, filters):
	return frappe.db.sql("""select `tabDelivery Note`.name, `tabDelivery Note`.customer_name
		from `tabDelivery Note`
		where `tabDelivery Note`.`%(key)s` like %(txt)s and
			`tabDelivery Note`.docstatus = 1 %(fcond)s and
			(ifnull((select sum(qty) from `tabDelivery Note Item` where
					`tabDelivery Note Item`.parent=`tabDelivery Note`.name), 0) >
				ifnull((select sum(qty) from `tabSales Invoice Item` where
					`tabSales Invoice Item`.docstatus = 1 and
					`tabSales Invoice Item`.delivery_note=`tabDelivery Note`.name), 0))
			%(mcond)s order by `tabDelivery Note`.`%(key)s` asc
			limit %(start)s, %(page_len)s""" % {
				"key": searchfield,
				"fcond": get_filters_cond(doctype, filters, []),
				"mcond": get_match_cond(doctype),
				"start": "%(start)s", "page_len": "%(page_len)s", "txt": "%(txt)s"
			}, { "start": start, "page_len": page_len, "txt": ("%%%s%%" % txt) })

def get_batch_no(doctype, txt, searchfield, start, page_len, filters):
	if not filters.get("posting_date"):
		filters["posting_date"] = nowdate()

	batch_nos = None
	args = {
		'item_code': filters.get("item_code"),
		'warehouse': filters.get("warehouse"),
		'posting_date': filters.get('posting_date'),
		'txt': "%%%s%%" % txt,
		'mcond':get_match_cond(doctype),
		"start": start,
		"page_len": page_len
	}

	if args.get("warehouse"):
		batch_nos = frappe.db.sql("""select sle.batch_no
			from `tabStock Ledger Entry` sle, `tabBatch`
			where sle.batch_no = `tabBatch`.name
				and sle.item_code = '%(item_code)s'
				and sle.warehouse = '%(warehouse)s'
				and sle.batch_no like '%(txt)s'
				and (ifnull(`tabBatch`.expiry_date, '2099-12-31') >= %(posting_date)s
						or `tabBatch`.expiry_date = '')
				and `tabBatch`.docstatus != 2
			%(mcond)s
			group by batch_no having sum(actual_qty) > 0
			order by batch_no desc
			limit %(start)s, %(page_len)s """
			% args)

	if batch_nos:
		return batch_nos
	else:
		return frappe.db.sql("""select name from `tabBatch`
			where item = '%(item_code)s'
			and docstatus < 2
			and (ifnull(expiry_date, '2099-12-31') >= %(posting_date)s
				or expiry_date = '' or expiry_date = "0000-00-00")
			%(mcond)s
			order by name desc
			limit %(start)s, %(page_len)s
		""" % args)

def get_account_list(doctype, txt, searchfield, start, page_len, filters):
	filter_list = []

	if isinstance(filters, dict):
		for key, val in filters.items():
			if isinstance(val, (list, tuple)):
				filter_list.append([doctype, key, val[0], val[1]])
			else:
				filter_list.append([doctype, key, "=", val])

	if "group_or_ledger" not in [d[1] for d in filter_list]:
		filter_list.append(["Account", "group_or_ledger", "=", "Ledger"])

	if searchfield and txt:
		filter_list.append([doctype, searchfield, "like", "%%%s%%" % txt])

	return frappe.widgets.reportview.execute("Account", filters = filter_list,
		fields = ["name", "parent_account"],
		limit_start=start, limit_page_length=page_len, as_list=True)