# -*- coding: utf-8 -*-
from odoo import fields, models, api
from odoo.osv import expression
from datetime import datetime
import pytz


class PosOrder(models.Model):
    _inherit = 'pos.order'

    @api.model
    def search_paid_order_ids(self, config_id, domain, limit, offset):
        """Limit paid orders list loaded on POS frontend to the current day."""
        user_tz_name = self.env.context.get('tz') or self.env.user.tz or 'UTC'
        try:
            user_tz = pytz.timezone(user_tz_name)
        except pytz.UnknownTimeZoneError:
            user_tz = pytz.UTC

        today_local = fields.Date.to_date(fields.Date.context_today(self))
        today_start_local = datetime.combine(today_local, datetime.min.time())
        today_start_tz = user_tz.localize(today_start_local)
        today_start_utc = today_start_tz.astimezone(pytz.UTC).replace(tzinfo=None)

        # Restrict domain so only orders from the current day (local timezone start) are returned
        domain = expression.AND([domain, [('date_order', '>=', today_start_utc)]])

        return super(PosOrder, self).search_paid_order_ids(config_id, domain, limit, offset)

    @api.model
    def check_table_has_real_orders(self, table_id, local_order_ids=None):
        """
        Check whether a restaurant table has real (non-empty, non-cancelled) orders
        on the server, excluding the empty local order IDs known to the calling device.

        This is a safety guard for the multi-device "Release table" scenario:
        - Device X creates an order on table T and syncs it to the server.
        - Device Y opens table T and sees an empty local order (sync lag).
        - Before allowing Device Y to release (cancel) the empty order, we verify
          with the server that no real orderlines exist for this table.

        Args:
            table_id (int): The restaurant.table ID to check.
            local_order_ids (list[int]): Server IDs of orders already known to the
                                         calling device (typically the empty local order).

        Returns:
            dict:
                - has_real_orders (bool): True if real draft orders with non-zero lines exist.
                - order_count (int): Number of matching server orders found.
        """
        if local_order_ids is None:
            local_order_ids = []

        # Find draft (non-finalized) orders for this table that have lines
        domain = [
            ('table_id', '=', table_id),
            ('state', '=', 'draft'),
            ('lines', '!=', False),
        ]
        if local_order_ids:
            # Exclude the empty order(s) already known to the calling device so we
            # don't false-positive on an order that this device itself created.
            domain = expression.AND([domain, [('id', 'not in', local_order_ids)]])

        orders = self.env['pos.order'].search(domain)

        # Double-check: at least one line with non-zero qty must exist
        real_orders = orders.filtered(lambda o: any(line.qty != 0 for line in o.lines))

        return {
            'has_real_orders': bool(real_orders),
            'order_count': len(real_orders),
        }