# -*- coding: utf-8 -*-
# Copyright 2026 Nexa Systems Inc.
# License OPL-1 (Odoo Proprietary License v1.0)

from odoo import api, fields, models


class PlanningSlot(models.Model):
    _inherit = 'planning.slot'

    # Bulk-create helper: when set on a NEW slot, the system also creates
    # one identical copy of the shift for each of these resources.
    # Combined with the recurrence config, this lets a manager schedule
    # the same shift across many employees in a single Save.
    x_fc_additional_resource_ids = fields.Many2many(
        'resource.resource',
        'fc_planning_slot_extra_resource_rel',
        'slot_id',
        'resource_id',
        string='Apply Also To',
        help="Also create this same shift for each of these employees. "
             "Useful when scheduling the same shift across many people in one go.",
    )

    @api.model_create_multi
    def create(self, vals_list):
        # 1. Auto-publish: every new shift is born published so employees
        #    see it immediately. Manager keeps full control via the existing
        #    Publish/Unpublish buttons after the fact.
        # 2. Multi-resource expansion: if a manager fills the Apply Also To
        #    field, build one extra vals dict per additional resource.
        expanded_vals_list = []
        for vals in vals_list:
            vals.setdefault('state', 'published')

            extra_ids = self._fc_pop_additional_resource_ids(vals)
            primary_rid = vals.get('resource_id')

            expanded_vals_list.append(vals)

            for rid in extra_ids:
                if rid == primary_rid:
                    continue
                copy_vals = dict(vals)
                copy_vals['resource_id'] = rid
                copy_vals.pop('x_fc_additional_resource_ids', None)
                expanded_vals_list.append(copy_vals)

        return super().create(expanded_vals_list)

    @api.model
    def _fc_pop_additional_resource_ids(self, vals):
        """Pop and flatten the m2m vals into a plain list of resource ids."""
        cmds = vals.pop('x_fc_additional_resource_ids', None) or []
        ids = []
        for cmd in cmds:
            # Odoo m2m commands: (6, 0, ids) replace, (4, id) link, (1, id, vals) update
            if isinstance(cmd, (list, tuple)):
                if cmd[0] == 6 and len(cmd) >= 3:
                    ids.extend(cmd[2])
                elif cmd[0] == 4 and len(cmd) >= 2:
                    ids.append(cmd[1])
            elif isinstance(cmd, int):
                ids.append(cmd)
        return ids