using Entity.Ammeter;
using Entity.Dto.Req;
using HybirdFrameworkCore.Autofac.Attribute;
using HybirdFrameworkCore.Entity;
using Repository.Ammeter;
using SqlSugar;

namespace Service.Ammeter
{
    /// <summary>
    /// 
    /// </summary>
    [Scope("SingleInstance")]
    public class EmeterDayEnergyService : BaseServices<EmeterDayEnergy>
    {
        public EmeterDayEnergyService(EmeterDayEnergyRepository service)
        {
            this.BaseDal = service;
        }
        public async Task<PageResult<EmeterDayEnergy>> Page(PageAmmeterReq queryPageModel)
        {
            QueryPageModel queryPageModel1 = new QueryPageModel
            {
                PageNum = queryPageModel.PageNum,
                PageSize = queryPageModel.PageSize,
            };
            if (!string.IsNullOrEmpty(queryPageModel.Code))
                return PageResult<EmeterDayEnergy>.ConvertPage(this.BaseDal.QueryIPageByCause(queryPageModel1, u => u.Code == queryPageModel.Code));
            else
                return PageResult<EmeterDayEnergy>.ConvertPage(this.BaseDal.QueryIPageByCause(queryPageModel1, null));
        }
        
        
        /// <summary>
        /// 获取七天用电量
        /// </summary>
        /// <returns></returns>
        public async Task<List<EmeterDayEnergy>> SevenDaysElectrical(int type)
        {
            // 根据code分组,取最近7天数据,每天最大值-最小值=当日用电量,如果当天目前只有一条数据,取当天最大值-前一天最大值=当天耗电量
            string sql = $@"
    WITH daily_max_min AS (
    SELECT 
        `code`,
        DATE(`time`) AS `UploadTime`,
        MAX(`real_time_value`) AS `MaxValue`,
        MIN(`real_time_value`) AS `MinValue`,
        COUNT(*) AS `Count`
    FROM 
        `emeter_day_energy`
    WHERE 
        `time` >= NOW() - INTERVAL 8 DAY
        AND `type` = {type}
    GROUP BY 
        `code`, DATE(`time`)
), previous_day_max AS (
    SELECT
        `code`,
        `UploadTime`,
        `MaxValue`,
        `MinValue`,
        `Count`,
        LAG(`MaxValue`) OVER (PARTITION BY `code` ORDER BY `UploadTime`) AS `PreviousMaxValue`
    FROM
        daily_max_min
), daily_consumption AS (
    SELECT 
        d.`code`,
        d.`UploadTime`,
        CASE 
            WHEN d.`Count` > 1 THEN d.`MaxValue` - d.`MinValue`
            WHEN d.`Count` = 1 AND d.`PreviousMaxValue` IS NOT NULL THEN d.`MaxValue` - d.`PreviousMaxValue`
            ELSE 0
        END AS `DailyValue`
    FROM 
        previous_day_max d
    WHERE 
        d.`UploadTime` >= NOW() - INTERVAL 7 DAY
)
SELECT 
    `UploadTime`,
    SUM(`DailyValue`) AS `Value`
FROM 
    daily_consumption
GROUP BY 
    `UploadTime`
ORDER BY 
    `UploadTime`;
";

            List<EmeterDayEnergy> emeterEnergies = await this.BaseDal.SqlQueryable(sql);
            return emeterEnergies;
        }
        
        
        /// <summary>
        /// 获取全部用电量
        /// </summary>
        /// <returns></returns>
        public async Task<List<EmeterDayEnergy>> GetAllElectricalData(int type)
        {
            string sql = $@"
        SELECT 
            code,
            MAX(real_time_value) - MIN(real_time_value) AS Value
        FROM 
            emeter_day_energy
        WHERE 
            time >= DATE_FORMAT(NOW(), '%Y-%m-01')
            AND type = {type}
        GROUP BY 
            code
        ORDER BY 
            code;
    ";

            List<EmeterDayEnergy> emeterEnergies = await this.BaseDal.SqlQueryable(sql);
            return emeterEnergies;
        }
    }
}