from odoo import models, fields, api

class AppNotification(models.Model):
    _name = 'mapan.app.notification'
    _description = 'Mobile App Promotional Notification'
    _order = 'create_date desc'

    title = fields.Char(string='Notification Title', required=True)
    body = fields.Text(string='Notification Body', required=True)

    # Optional promotional image — Odoo auto-generates image_128 thumbnail
    image = fields.Image(
        string='Notification Image',
        max_width=1920,
        max_height=1920,
        help='Optional image shown in the notification detail screen.'
    )
    image_128 = fields.Image(
        string='Thumbnail',
        related='image',
        max_width=128,
        max_height=128,
        store=True,
        readonly=True,
    )

    # If no partner_ids are selected, it is broadcast to everyone logically
    partner_ids = fields.Many2many(
        'res.partner',
        string='Selected Customers',
        help='Leave empty to broadcast to all app users.'
    )

    is_global = fields.Boolean(
        string='Broadcast to All?', 
        compute='_compute_is_global', 
        store=True
    )

    @api.depends('partner_ids')
    def _compute_is_global(self):
        for rec in self:
            rec.is_global = not bool(rec.partner_ids)