# -*- coding: utf-8 -*-
from odoo import api, fields, models, _
from odoo.exceptions import UserError

class SignItem(models.Model):
    _inherit = "sign.item"

    sequence_id = fields.Many2one('ir.sequence', string="Sequence")
    item_type = fields.Selection(related='type_id.item_type')
    
    # Proxy fields to allow editing sequence from the sign item
    sequence_prefix = fields.Char(related='sequence_id.prefix', readonly=False)
    sequence_padding = fields.Integer(related='sequence_id.padding', readonly=False)
    sequence_number_next = fields.Integer(related='sequence_id.number_next_actual', readonly=False, string="Next Number")

    @api.onchange('type_id')
    def _onchange_type_id_sequence(self):
        if self.type_id.item_type == 'sequence' and not self.sequence_id:
            # Optional: auto-create or encourage selection? 
            # For now, just leave empty for user to select.
            pass

    def action_create_sequence(self):
        """ Helper to create a new sequence for this item if needed """
        self.ensure_one()
        if not self.sequence_id:
            seq = self.env['ir.sequence'].create({
                'name': f"Sign Sequence - {self.template_id.name}",
                'code': f"sign.item.{self.id}",
                'prefix': 'SEQ-',
                'padding': 4,
            })
            self.sequence_id = seq