# -*- coding: utf-8 -*-

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

class LoyaltyProgram(models.Model):
    _name = 'loyalty.program'
    _inherit = ['loyalty.program', 'mail.thread', 'mail.activity.mixin']

    state = fields.Selection([
        ('draft', 'Draft'),
        ('pending', 'Pending Approval'),
        ('approved', 'Approved')
    ], default='draft', string='Status', tracking=True)

    def action_request_approval(self):
        for program in self:
            if program.state != 'draft':
                continue
            program.write({'state': 'pending'})
            program.message_post(body=_("Approval requested for this marketing program."))

    def action_approve(self):
        for program in self:
            if program.state != 'pending':
                continue
            
            # Check authorization
            target_company = program.company_id or self.env.company
            approver = target_company._get_marketing_program_approver()
            
            if approver:
                if self.env.user.id != approver.id:
                    raise UserError(_("Only the designated Marketing Program Approver (%s) can approve this program.") % approver.name)
            else:
                is_manager = self.env.user.has_group('pos_loyalty_marketing_access.group_marketing_manager')
                if not is_manager:
                    raise UserError(_("Only a Marketing Manager can approve this program as no designated approver is configured."))
            
            program.write({'state': 'approved'})
            program.message_post(body=_("Marketing program has been approved and is now active."))

    def action_reset_draft(self):
        for program in self:
            program.write({'state': 'draft'})
            program.message_post(body=_("Marketing program reset to Draft."))

    def write(self, vals):
        # Fields that do not require re-approval when modified (e.g., sequence reordering, archiving, or chatter/activity updates)
        non_trigger_fields = {
            'sequence', 'state', 'active', 'write_uid', 'write_date',
            'message_follower_ids', 'message_ids', 'message_main_attachment_id',
            'activity_ids', 'activity_state', 'activity_user_id', 'activity_type_id',
            'activity_date_deadline', 'activity_summary'
        }

        # If all modified fields are in the non-trigger list, skip reset logic
        if all(k in non_trigger_fields for k in vals):
            return super().write(vals)

        # Skip reset logic if Odoo is installing/upgrading modules or explicitly bypassed
        if (self.env.context.get('install_mode') 
            or self.env.context.get('no_marketing_reset')
            or self.env.context.get('module')):
            return super().write(vals)

        # For modifications, check if they are in pending/approved state
        programs_to_reset = self.filtered(lambda p: p.state in ['pending', 'approved'])
        if programs_to_reset:
            vals['state'] = 'draft'
            for program in programs_to_reset:
                program.message_post(body=_("The marketing program was modified and has been reset to Draft status for re-approval."))

        return super().write(vals)