from __future__ import unicode_literals

import frappe
from frappe import _
from frappe.model.naming import make_autoname
from frappe.utils import flt, nowdate

from erpnext.accounts.doctype.account.test_account import create_account
from erpnext.loan_management.doctype.loan_repayment.loan_repayment import (
	get_accrued_interest_entries,
)
from erpnext.loan_management.doctype.process_loan_interest_accrual.process_loan_interest_accrual import (
	process_loan_interest_accrual_for_term_loans,
)


def execute():

	# Create a penalty account for loan types

	frappe.reload_doc('loan_management', 'doctype', 'loan_type')
	frappe.reload_doc('loan_management', 'doctype', 'loan')
	frappe.reload_doc('loan_management', 'doctype', 'repayment_schedule')
	frappe.reload_doc('loan_management', 'doctype', 'process_loan_interest_accrual')
	frappe.reload_doc('loan_management', 'doctype', 'loan_repayment')
	frappe.reload_doc('loan_management', 'doctype', 'loan_repayment_detail')
	frappe.reload_doc('loan_management', 'doctype', 'loan_interest_accrual')
	frappe.reload_doc('accounts', 'doctype', 'gl_entry')
	frappe.reload_doc('accounts', 'doctype', 'journal_entry_account')

	updated_loan_types = []
	loans_to_close = []

	# Update old loan status as closed
	if frappe.db.has_column('Repayment Schedule', 'paid'):
		loans_list = frappe.db.sql("""SELECT distinct parent from `tabRepayment Schedule`
			where paid = 0 and docstatus = 1""", as_dict=1)

		loans_to_close = [d.parent for d in loans_list]

	if loans_to_close:
		frappe.db.sql("UPDATE `tabLoan` set status = 'Closed' where name not in (%s)" % (', '.join(['%s'] * len(loans_to_close))), tuple(loans_to_close))

	loans = frappe.get_all('Loan', fields=['name', 'loan_type', 'company', 'status', 'mode_of_payment',
		'applicant_type', 'applicant', 'loan_account', 'payment_account', 'interest_income_account'],
		filters={'docstatus': 1, 'status': ('!=', 'Closed')})

	for loan in loans:
		# Update details in Loan Types and Loan
		loan_type_company = frappe.db.get_value('Loan Type', loan.loan_type, 'company')
		loan_type = loan.loan_type

		group_income_account = frappe.get_value('Account', {'company': loan.company,
			'is_group': 1, 'root_type': 'Income', 'account_name': _('Indirect Income')})

		if not group_income_account:
			group_income_account = frappe.get_value('Account', {'company': loan.company,
				'is_group': 1, 'root_type': 'Income'})

		penalty_account = create_account(company=loan.company, account_type='Income Account',
			account_name='Penalty Account', parent_account=group_income_account)

		# Same loan type used for multiple companies
		if loan_type_company and loan_type_company != loan.company:
			# get loan type for appropriate company
			loan_type_name = frappe.get_value('Loan Type', {'company': loan.company,
				'mode_of_payment': loan.mode_of_payment, 'loan_account': loan.loan_account,
				'payment_account': loan.payment_account, 'interest_income_account': loan.interest_income_account,
				'penalty_income_account': loan.penalty_income_account}, 'name')

			if not loan_type_name:
				loan_type_name = create_loan_type(loan, loan_type_name, penalty_account)

			# update loan type in loan
			frappe.db.sql("UPDATE `tabLoan` set loan_type = %s where name = %s", (loan_type_name,
				loan.name))

			loan_type = loan_type_name
			if loan_type_name not in updated_loan_types:
				updated_loan_types.append(loan_type_name)

		elif not loan_type_company:
			loan_type_doc = frappe.get_doc('Loan Type', loan.loan_type)
			loan_type_doc.is_term_loan = 1
			loan_type_doc.company = loan.company
			loan_type_doc.mode_of_payment = loan.mode_of_payment
			loan_type_doc.payment_account = loan.payment_account
			loan_type_doc.loan_account = loan.loan_account
			loan_type_doc.interest_income_account = loan.interest_income_account
			loan_type_doc.penalty_income_account = penalty_account
			loan_type_doc.submit()
			updated_loan_types.append(loan.loan_type)
			loan_type = loan.loan_type

		if loan_type in updated_loan_types:
			if loan.status == 'Fully Disbursed':
				status = 'Disbursed'
			elif loan.status == 'Repaid/Closed':
				status = 'Closed'
			else:
				status = loan.status

			frappe.db.set_value('Loan', loan.name, {
				'is_term_loan': 1,
				'penalty_income_account': penalty_account,
				'status': status
			})

			process_loan_interest_accrual_for_term_loans(posting_date=nowdate(), loan_type=loan_type,
				loan=loan.name)


			if frappe.db.has_column('Repayment Schedule', 'paid'):
				total_principal, total_interest = frappe.db.get_value('Repayment Schedule', {'paid': 1, 'parent': loan.name},
					['sum(principal_amount) as total_principal', 'sum(interest_amount) as total_interest'])

				accrued_entries = get_accrued_interest_entries(loan.name)
				for entry in accrued_entries:
					interest_paid = 0
					principal_paid = 0

					if flt(total_interest) > flt(entry.interest_amount):
						interest_paid = flt(entry.interest_amount)
					else:
						interest_paid = flt(total_interest)

					if flt(total_principal) > flt(entry.payable_principal_amount):
						principal_paid = flt(entry.payable_principal_amount)
					else:
						principal_paid = flt(total_principal)

					frappe.db.sql(""" UPDATE `tabLoan Interest Accrual`
						SET paid_principal_amount = `paid_principal_amount` + %s,
							paid_interest_amount = `paid_interest_amount` + %s
						WHERE name = %s""",
						(principal_paid, interest_paid, entry.name))

					total_principal = flt(total_principal) - principal_paid
					total_interest = flt(total_interest) - interest_paid

def create_loan_type(loan, loan_type_name, penalty_account):
	loan_type_doc = frappe.new_doc('Loan Type')
	loan_type_doc.loan_name = make_autoname("Loan Type-.####")
	loan_type_doc.is_term_loan = 1
	loan_type_doc.company = loan.company
	loan_type_doc.mode_of_payment = loan.mode_of_payment
	loan_type_doc.payment_account = loan.payment_account
	loan_type_doc.loan_account = loan.loan_account
	loan_type_doc.interest_income_account = loan.interest_income_account
	loan_type_doc.penalty_income_account = penalty_account
	loan_type_doc.submit()

	return loan_type_doc.name
