from odoo import models, fields, api,_
from odoo.exceptions import UserError

class PaymentRequest(models.Model):
    _inherit = 'xf.doc.approval.document.package'
    _description = 'Payment Request'

    # Additional Fields for Payment Request
    amount = fields.Float(string="Amount")
    partner_id = fields.Many2one('res.partner', string="Vendor")
    bill_id = fields.Many2one('account.move', string="Vendor Bill", readonly=True)
    payment_order_id = fields.Many2one('account.payment', string="Payment Order", readonly=True)
    payment_amount = fields.Monetary(
        string="Payment Amount",
        currency_field='currency_id',  # Links to the currency field
    )
    currency_id = fields.Many2one(
        'res.currency',
        string="Currency",
        default=lambda self: self.env.company.currency_id,  # Default to company currency
        readonly=True,
    )
    type_request = fields.Selection([('1','សំណើអនុម័តឯកសារ'),('2','សំណើសុំអនុម័តថវិកា'),('3','សំណើសុំអនុម័តគោលការណ៍ និងថវិកា')],string="Request type")

    # Override action_finish_approval to include vendor bill creation
    def action_finish_approval(self):
        """
        Finish the approval process and generate a vendor bill if approved.
        """
        for record in self:
            if record.approval_state == 'approved':
                record.state = 'approved'
                # Generate the draft vendor bill
                record._generate_vendor_bill()
            else:
                raise UserError(_('Document Package must be fully approved!'))

    def _generate_vendor_bill(self):
        """
        Generate a draft vendor bill in Accounting.
        """
        for record in self:
            if not record.partner_id and record.type_request != '2':
                raise UserError(_("No vendor selected for this payment request."))

            # Dynamically fetch a product or create one if none exists
            product = self.env['product.product'].search([], limit=1)
            if not product:
                product = self.env['product.product'].create({
                    'name': 'Default Service',
                    'type': 'service',
                    'list_price': record.payment_amount,
                })

            # Create the draft vendor bill
            bill = self.env['account.move'].create({
                'move_type': 'in_invoice',
                'partner_id': record.partner_id.id,
                'invoice_date': fields.Date.today(),
                'invoice_line_ids': [(0, 0, {
                    'product_id': product.id,
                    'quantity': 1,
                    'price_unit': record.payment_amount,
                    'name': f"Payment Request - {record.name}",
                })],
            })
            record.write({'bill_id': bill.id})

    def action_request_bank_payment(self):
        """
        Request bank payment after vendor bill is created.
        """
        for record in self:
            if not record.bill_id:
                raise UserError(_("No vendor bill exists for this payment request."))

            # Create a payment order
            payment = self.env['account.payment'].create({
                'payment_type': 'outbound',
                'partner_id': record.partner_id.id,
                'amount': record.payment_amount,
                'date': fields.Date.today(),
                'journal_id': self.env['account.journal'].search([('type', '=', 'bank')], limit=1).id,
                'payment_method_id': self.env.ref('account.account_payment_method_manual_out').id,
            })
            record.write({'payment_order_id': payment.id})
            return {
                'type': 'ir.actions.client',
                'tag': 'display_notification',
                'params': {
                    'title': 'Request Bank Payment',
                    'message': f'you are request bank payment done.',
                    'sticky': False,
                }
            }

    def action_post_vendor_bill(self):
        """
        Post the vendor bill in Accounting.
        """
        for record in self:
            if not record.bill_id:
                raise UserError(_("No vendor bill exists for this payment request."))
            if record.bill_id.state != 'draft':
                raise UserError(_("The vendor bill is already posted or canceled."))

            # Post the vendor bill
            record.bill_id.action_post()
            if record.bill_id:
                return {
                    'type': 'ir.actions.client',
                    'tag': 'display_notification',
                    'params': {
                        'title': 'Post Vendor Bill',
                        'message': f'you are Post Vendor Bill done.',
                        'sticky': False,
                    }
                }


class ProposalPayment(models.Model):
    _name = 'p.payment'
    _description = 'សំណើសុំអនុម័តគោលការណ៍'

    name = fields.Char()
    amount = fields.Monetary(string="Payment Amount",
        currency_field='currency_id')
    currency_id = fields.Many2one(
        'res.currency',
        string="Currency",
        default=lambda self: self.env.company.currency_id,  # Default to company currency
        readonly=True,
    )