from odoo import models, fields, api


class PurchaseOrder(models.Model):
    _inherit = 'purchase.order'

    finance_state = fields.Selection([
        ('pending', 'Pending Approval'),
        ('approved', 'Finance Approved'),
        ('rejected', 'Rejected'),
    ], string='Status Finance', default='pending', tracking=True)

    def action_finance_approve(self):
        """Finance mengklik ini setelah review PO."""
        return self.write({'finance_state': 'approved'})

    def action_finance_reject(self):
        """Finance menolak PO — ada catatan di notes."""
        return self.write({'finance_state': 'rejected'})

    @api.model
    def _get_state_color(self):
        # optional: styling di kanban view
        return {'pending': 'warning', 'approved': 'success', 'rejected': 'danger'}