from odoo import api, fields, models
from odoo.tools import SQL
from odoo.tools.sql import drop_view_if_exists


class PreparationTimeReport(models.Model):
    _name = "preparation.time.report"
    _auto = False
    _description = "POS Preparation Time Report"

    preparation_time = fields.Float("Preparation Time")
    avg_preparation_time = fields.Float("Average Preparation Time")
    order_hour = fields.Char("Hour")
    create_date = fields.Datetime("Order Date")
    pos_config_id = fields.Many2one('pos.config', string='POS Config', readonly=True)
    product_id = fields.Many2one('product.product', string='Product', readonly=True)
    order_id = fields.Many2one('pos.order', string='Order', readonly=True)
    qty = fields.Float('Quantity')

    @property
    def _table_query(self):
        return self._select()

    @api.model
    def _select(self):
        user_tz = self.env.context.get('tz') or self.env.user.tz or 'UTC'
        return SQL(
            """
            WITH base AS (
                SELECT
                    line.id,
                    line.preparation_time,
                    line.create_date AS create_date,
                    line.product_id AS product_id,
                    line.order_id AS order_id,
                    line.qty AS qty,
                    TO_CHAR(line.create_date AT TIME ZONE 'UTC' AT TIME ZONE %(user_tz)s, 'HH24:00') AS order_hour,
                    pc.id AS pos_config_id
                FROM pos_order_line line
                JOIN pos_order po ON line.order_id = po.id
                JOIN pos_config pc ON po.config_id = pc.id
                WHERE line.preparation_time >= 0
            )
            SELECT
                id,
                preparation_time,
                AVG(preparation_time) OVER (
                    PARTITION BY order_hour, pos_config_id
                ) /
                COUNT(*) OVER (
                    PARTITION BY order_hour, pos_config_id
                ) AS avg_preparation_time,
                create_date,
                order_hour,
                product_id,
                order_id,
                qty,
                pos_config_id
            FROM base
            """,
            user_tz=user_tz,
        )

    def init(self):
        drop_view_if_exists(self.env.cr, self._table)