text: # Copyright (c) 2013, MostafaFekry and contributors
  # For license information, please see license.txt
  
  from __future__ import unicode_literals
  import frappe, erpnext
  from erpnext import get_company_currency, get_default_company
  from erpnext.accounts.report.utils import get_currency, convert_to_presentation_currency
  from frappe.utils import getdate, cstr, flt, fmt_money
  from frappe import _, _dict
  from erpnext.accounts.utils import get_account_currency
  from erpnext.accounts.report.financial_statements import get_cost_centers_with_children
  from six import iteritems
  from collections import OrderedDict
  
  def execute(filters=None):
  	if not filters:
  		return [], []
  
  	if filters.get('party'):
  		parties = cstr(filters.get("party")).strip()
  		filters.party = [d.strip() for d in parties.split(',') if d]
  
  	validate_filters(filters)
  
  	validate_party(filters)
  
  	filters = set_account_currency(filters)
  
  	columns = get_columns(filters)
  
  	res = get_result(filters)
  
  	return columns, res
  
  
  def validate_filters(filters):
  	if not filters.get('company'):
  		frappe.throw(_('{0} is mandatory').format(_('Company')))
  
  	if not filters.get('party'):
  		frappe.throw(_('{0} is mandatory').format(_('party')))
  
  	if filters.from_date > filters.to_date:
  		frappe.throw(_("From Date must be before To Date"))
  
  
  def validate_party(filters):
  	party = filters.get("party")
  
  	if party:
  		for d in party:
  			if not frappe.db.exists("Customer", d):
  				frappe.throw(_("Invalid Customer: {0}").format(d))
  
  def set_account_currency(filters):
  	if (filters.get('party') and len(filters.party) == 1):
  		filters["company_currency"] = frappe.get_cached_value('Company',  filters.company,  "default_currency")
  		account_currency = None
  
  		if filters.get("party"):
  			gle_currency = frappe.db.get_value(
  				"GL Entry", {
  					"party_type": "Customer", "party": filters.party[0], "company": filters.company
  				},
  				"account_currency"
  			)
  
  			if gle_currency:
  				account_currency = gle_currency
  			else:
  				account_currency = frappe.db.get_value("Customer", filters.party[0], "default_currency")
  
  		filters["account_currency"] = account_currency or filters.company_currency
  		if filters.account_currency != filters.company_currency and not filters.presentation_currency:
  			filters.presentation_currency = filters.account_currency
  
  	return filters
  
  def get_result(filters):
  	gl_entries = get_gl_entries(filters)
  
  	data = get_data_with_opening_closing(filters, gl_entries)
  
  	result = get_result_as_list(data, filters)
  
  	return result
  
  def get_gl_entries(filters):
  	currency_map = get_currency(filters)
  	select_fields = """, debit, credit, debit_in_account_currency,
  		credit_in_account_currency """
  
  
  	order_by_statement = "order by posting_date, account"
  
  	if filters.get("group_by") == _("Group by Voucher"):
  		order_by_statement = "order by posting_date, voucher_type, voucher_no"
  
  
  	gl_entries = frappe.db.sql(
  		"""
  		select
  			posting_date, account, party_type, party,
  			voucher_type, voucher_no, cost_center, project,
  			against_voucher_type, against_voucher, account_currency,
  			remarks, against, is_opening {select_fields}
  		from `tabGL Entry`
  		where company=%(company)s {conditions}
  		{order_by_statement}
  		""".format(
  			select_fields=select_fields, conditions=get_conditions(filters),
  			order_by_statement=order_by_statement
  		),
  		filters, as_dict=1)
  
  	if filters.get('presentation_currency'):
  		return convert_to_presentation_currency(gl_entries, currency_map)
  	else:
  		return gl_entries
  
  
  def get_conditions(filters):
  	conditions = []
  	if filters.get("account"):
  		lft, rgt = frappe.db.get_value("Account", filters["account"], ["lft", "rgt"])
  		conditions.append("""account in (select name from tabAccount
  			where lft>=%s and rgt<=%s and docstatus<2)""" % (lft, rgt))
  
  
  	if filters.get("group_by") == "Group by Party" and not filters.get("party_type"):
  		conditions.append("party_type in ('Customer', 'Supplier')")
  
  	conditions.append("party_type='Customer'")
  
  	if filters.get("party"):
  		conditions.append("party in %(party)s")
  
  	if not (filters.get("party") or
  		filters.get("group_by") in ["Group by Account", "Group by Party"]):
  		conditions.append("posting_date >=%(from_date)s")
  
  	conditions.append("(posting_date <=%(to_date)s or is_opening = 'Yes')")
  
  
  	from frappe.desk.reportview import build_match_conditions
  	match_conditions = build_match_conditions("GL Entry")
  
  	if match_conditions:
  		conditions.append(match_conditions)
  
  	return "and {}".format(" and ".join(conditions)) if conditions else ""
  
  
  def get_data_with_opening_closing(filters, gl_entries):
  	data = []
  
  	gle_map = initialize_gle_map(gl_entries, filters)
  
  	totals, entries = get_accountwise_gle(filters, gl_entries, gle_map)
  
  	# Opening for filtered account
  	data.append(totals.opening)
  
  	if filters.get("group_by") != _('Group by Voucher (Consolidated)'):
  		for acc, acc_dict in iteritems(gle_map):
  			# acc
  			if acc_dict.entries:
  				# opening
  				data.append({})
  				if filters.get("group_by") != _("Group by Voucher"):
  					data.append(acc_dict.totals.opening)
  
  				data += acc_dict.entries
  
  				# totals
  				data.append(acc_dict.totals.total)
  
  				# closing
  				if filters.get("group_by") != _("Group by Voucher"):
  					data.append(acc_dict.totals.closing)
  		data.append({})
  	else:
  		data += entries
  
  	# totals
  	data.append(totals.total)
  
  	# closing
  	data.append(totals.closing)
  
  	return data
  
  def get_totals_dict():
  	def _get_debit_credit_dict(label):
  		return _dict(
  			voucher_no="'{0}'".format(label),
  			debit=0.0,
  			credit=0.0,
  			debit_in_account_currency=0.0,
  			credit_in_account_currency=0.0
  		)
  	return _dict(
  		opening = _get_debit_credit_dict(_('Opening')),
  		total = _get_debit_credit_dict(_('Total')),
  		closing = _get_debit_credit_dict(_('Closing (Opening + Total)'))
  	)
  
  def group_by_field(group_by):
  	if group_by == _('Group by Party'):
  		return 'party'
  	elif group_by in [_('Group by Voucher (Consolidated)'), _('Group by Account')]:
  		return 'account'
  	else:
  		return 'voucher_no'
  
  def initialize_gle_map(gl_entries, filters):
  	gle_map = OrderedDict()
  	group_by = group_by_field(filters.get('group_by'))
  
  	for gle in gl_entries:
  		gle_map.setdefault(gle.get(group_by), _dict(totals=get_totals_dict(), entries=[]))
  	return gle_map
  
  
  def get_accountwise_gle(filters, gl_entries, gle_map):
  	totals = get_totals_dict()
  	entries = []
  	consolidated_gle = OrderedDict()
  	group_by = group_by_field(filters.get('group_by'))
  
  	def update_value_in_dict(data, key, gle):
  		data[key].debit += flt(gle.debit)
  		data[key].credit += flt(gle.credit)
  
  		data[key].debit_in_account_currency += flt(gle.debit_in_account_currency)
  		data[key].credit_in_account_currency += flt(gle.credit_in_account_currency)
  
  	from_date, to_date = getdate(filters.from_date), getdate(filters.to_date)
  	for gle in gl_entries:
  		if (gle.posting_date < from_date or cstr(gle.is_opening) == "Yes"):
  			update_value_in_dict(gle_map[gle.get(group_by)].totals, 'opening', gle)
  			update_value_in_dict(totals, 'opening', gle)
  
  			update_value_in_dict(gle_map[gle.get(group_by)].totals, 'closing', gle)
  			update_value_in_dict(totals, 'closing', gle)
  
  		elif gle.posting_date <= to_date:
  			update_value_in_dict(gle_map[gle.get(group_by)].totals, 'total', gle)
  			update_value_in_dict(totals, 'total', gle)
  			if filters.get("group_by") != _('Group by Voucher (Consolidated)'):
  				gle_map[gle.get(group_by)].entries.append(gle)
  			else:
  				key = (gle.get("voucher_type"), gle.get("voucher_no"))
  				if key not in consolidated_gle:
  					consolidated_gle.setdefault(key, gle)
  
  				else:
  					update_value_in_dict(consolidated_gle, key, gle)
  
  
  			update_value_in_dict(gle_map[gle.get(group_by)].totals, 'closing', gle)
  			update_value_in_dict(totals, 'closing', gle)
  
  	for key, value in consolidated_gle.items():
  		entries.append(value)
  		if value.get("voucher_type") == "Sales Invoice":
  			#entries.append(_dict(item_name="mostafa",amount=0.0))
  			sales_invoice_item = frappe.db.sql("""
  				select
  					item_code as item_name, qty, rate, amount
  				from `tabSales Invoice Item`
  				where parent=%s
  				order by idx
  				""",value.get("voucher_no"), as_dict=1)
  			if sales_invoice_item:
  				for sii in sales_invoice_item:
  					entries.append(frappe._dict(sii))
  
  
  	return totals, entries
  
  def get_result_as_list(data, filters):
  	balance, balance_in_account_currency = 0, 0
  	inv_details = get_supplier_invoice_details()
  
  	for d in data:
  		if not d.get('posting_date') and not d.get('item_name'):
  			balance, balance_in_account_currency = 0, 0
  
  		balance = get_balance(d, balance, 'debit', 'credit')
  		d['balance'] = balance
  
  		d['account_currency'] = filters.account_currency
  		d['bill_no'] = inv_details.get(d.get('against_voucher'), '')
  
  	return data
  
  def get_supplier_invoice_details():
  	inv_details = {}
  	for d in frappe.db.sql(""" select name, bill_no from `tabPurchase Invoice`
  		where docstatus = 1 and bill_no is not null and bill_no != '' """, as_dict=1):
  		inv_details[d.name] = d.bill_no
  
  	return inv_details
  
  def get_balance(row, balance, debit_field, credit_field):
  	balance += (row.get(debit_field, 0) -  row.get(credit_field, 0))
  
  	return balance
  
  def get_columns(filters):
  	if filters.get("presentation_currency"):
  		currency = filters["presentation_currency"]
  	else:
  		if filters.get("company"):
  			currency = get_company_currency(filters["company"])
  		else:
  			company = get_default_company()
  			currency = get_company_currency(company)
  
  	columns = [
  		{
  			"label": _("Posting Date"),
  			"fieldname": "posting_date",
  			"fieldtype": "Date",
  			"width": 90
  		},
  		{
  			"label": _("Voucher Type"),
  			"fieldname": "voucher_type",
  			"width": 120
  		},
  		{
  			"label": _("Voucher No"),
  			"fieldname": "voucher_no",
  			"fieldtype": "Dynamic Link",
  			"options": "voucher_type",
  			"width": 180
  		},
  		{
  			"label": _("Item Name"),
  			"fieldname": "item_name",
  			"fieldtype": "Link",
  			"options": "item",
  			"width": 180
  		},
  		{
  			"label": _("QTY"),
  			"fieldname": "qty",
  			"width": 80
  		},
  		{
  			"label": _("Rate"),
  			"fieldname": "rate",
  			"width": 80
  		},
  		{
  			"label": _("Amount"),
  			"fieldname": "amount",
  			"width": 100
  		},
  		{
  			"label": _("Debit ({0})".format(currency)),
  			"fieldname": "debit",
  			"fieldtype": "Float",
  			"width": 100
  		},
  		{
  			"label": _("Credit ({0})".format(currency)),
  			"fieldname": "credit",
  			"fieldtype": "Float",
  			"width": 100
  		},
  		{
  			"label": _("Balance ({0})".format(currency)),
  			"fieldname": "balance",
  			"fieldtype": "Float",
  			"width": 130
  		}
  	]
  
  	columns.extend([
  		{
  			"label": _("Against Account"),
  			"fieldname": "against",
  			"width": 120
  		},
  		{
  			"label": _("Customer"),
  			"fieldname": "party",
  			"fieldtype": "Link",
  			"options": "Customer",
  			"width": 100
  		},
  		{
  			"label": _("Against Voucher Type"),
  			"fieldname": "against_voucher_type",
  			"width": 100
  		},
  		{
  			"label": _("Against Voucher"),
  			"fieldname": "against_voucher",
  			"fieldtype": "Dynamic Link",
  			"options": "against_voucher_type",
  			"width": 100
  		},
  		{
  			"label": _("Remarks"),
  			"fieldname": "remarks",
  			"width": 400
  		}
  	])
  
  	return columns
  