# 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 import _
from frappe.utils import get_fullname
from frappe.model.document import Document
from erpnext.hr.utils import set_employee_name

class InvalidExpenseApproverError(frappe.ValidationError): pass

class ExpenseClaim(Document):
	def validate(self):
		self.validate_fiscal_year()
		self.validate_exp_details()
		self.validate_expense_approver()
		set_employee_name(self)

	def on_submit(self):
		if self.approval_status=="Draft":
			frappe.throw(_("""Approval Status must be 'Approved' or 'Rejected'"""))

	def validate_fiscal_year(self):
		from erpnext.accounts.utils import validate_fiscal_year
		validate_fiscal_year(self.posting_date, self.fiscal_year, "Posting Date")

	def validate_exp_details(self):
		if not self.get('expense_voucher_details'):
			frappe.throw(_("Please add expense voucher details"))

	def validate_expense_approver(self):
		if self.exp_approver and "Expense Approver" not in frappe.get_roles(self.exp_approver):
			frappe.throw(_("{0} ({1}) must have role 'Expense Approver'")\
				.format(get_fullname(self.exp_approver), self.exp_approver), InvalidExpenseApproverError)