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

namespace Service.Ammeter
{
    /// <summary>
    /// 
    /// </summary>
    [Scope("SingleInstance")]
    public class EmeterMinutesEnergyService : BaseServices<EmeterMinutesEnergy>
    {
        EmeterMinutesEnergyRepository _emeterMinutesEnergyRepository1;
        public EmeterMinutesEnergyService(EmeterMinutesEnergyRepository emeterMinutesEnergyRepository)
        {
            this.BaseDal = emeterMinutesEnergyRepository;
            _emeterMinutesEnergyRepository1 = emeterMinutesEnergyRepository;
        }

        public async Task<PageResult<EmeterMinutesEnergy>> Page(PageAmmeterReq queryPageModel)
        {
            QueryPageModel queryPageModel1 = new QueryPageModel
            {
                PageNum = queryPageModel.PageNum,
                PageSize = queryPageModel.PageSize,
            };
            if (!string.IsNullOrEmpty(queryPageModel.Code))
                return PageResult<EmeterMinutesEnergy>.ConvertPage(_emeterMinutesEnergyRepository1.QueryIPageByCause(queryPageModel1, u => u.Code == queryPageModel.Code));
            else
                return PageResult<EmeterMinutesEnergy>.ConvertPage(_emeterMinutesEnergyRepository1.QueryIPageByCause(queryPageModel1, null));
        }
        
        
        /// <summary>
        /// 根据分钟统计电量
        /// </summary>
        /// <returns></returns>
        public async Task<List<EmeterMinutesEnergy>> GetTodayMinutelyElectricalData(int type)
        {
            string sql = $@"
                WITH minute_max_min AS (
                    SELECT 
                        `code`,
                        DATE_FORMAT(`time`, '%Y-%m-%d %H:%i:00') AS `Minute`,
                        MAX(`real_time_value`) AS `MaxValue`,
                        MIN(`real_time_value`) AS `MinValue`,
                        COUNT(*) AS `record_count`
                    FROM 
                        `emeter_minutes_energy`
                    WHERE 
                        `time` >= NOW() - INTERVAL 1 HOUR
                        AND `type` = {type}
                    GROUP BY 
                        `code`, DATE_FORMAT(`time`, '%Y-%m-%d %H:%i:00')
                ), previous_minute_max AS (
                    SELECT
                        `code`,
                        `Minute`,
                        LAG(`MaxValue`) OVER (PARTITION BY `code` ORDER BY `Minute`) AS `PreviousMaxValue`
                    FROM
                        minute_max_min
                )
                SELECT 
                    m.`code`,
                    m.`Minute`,
                    CASE 
                        WHEN m.`record_count` > 1 THEN m.`MaxValue` - m.`MinValue`
                        WHEN p.`PreviousMaxValue` IS NULL THEN 0
                        ELSE m.`MaxValue` - p.`PreviousMaxValue`
                    END AS `Value`
                FROM 
                    minute_max_min m
                LEFT JOIN 
                    previous_minute_max p ON m.`code` = p.`code` AND m.`Minute` = p.`Minute`
                ORDER BY 
                    m.`code`, m.`Minute`;
";

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