using Model;
using Model.Entity;
using ORM;
using Service.Interface;
using SqlSugar;
using System;
using System.Collections.Generic;
using System.Threading.Tasks;

namespace Service.Implement
{
    /// <summary>
    /// 设备看板服务实现（温湿度）
    /// </summary>
    public class DeviceDashboardService : IDeviceDashboardService
    {
        /// <summary>
        /// 获取每台设备最新一条温湿度数据（看板卡片用）
        /// </summary>
        public async Task<Result<List<TemperatureBoxDataEntity>>> GetRealtimeAsync()
        {
            try
            {
                var db = SqlSugarContext.DbContext;

                // 雪花 Id 单调递增，每台设备取最大 Id 即最新一条
                var latestIds = await db.Queryable<TemperatureBoxDataEntity>()
                    .Where(x => x.IsDel == 0)
                    .GroupBy(x => x.DeviceCode)
                    .Select(x => SqlFunc.AggregateMax(x.Id))
                    .ToListAsync();

                var list = await db.Queryable<TemperatureBoxDataEntity>()
                    .Where(x => latestIds.Contains(x.Id))
                    .OrderBy(x => x.DeviceCode)
                    .ToListAsync();

                return Result<List<TemperatureBoxDataEntity>>.Success(list);
            }
            catch (Exception ex)
            {
                return Result<List<TemperatureBoxDataEntity>>.Error("查询设备实时数据失败", ex);
            }
        }

        /// <summary>
        /// 获取指定设备最近 N 分钟的温湿度曲线数据（按时间升序）
        /// </summary>
        public async Task<Result<List<TemperatureBoxDataEntity>>> GetCurveAsync(string deviceCode, int minutes)
        {
            if (string.IsNullOrWhiteSpace(deviceCode))
                return Result<List<TemperatureBoxDataEntity>>.Error("设备标识不能为空");

            try
            {
                var start = DateTime.Now.AddMinutes(-minutes);
                var list = await SqlSugarContext.DbContext.Queryable<TemperatureBoxDataEntity>()
                    .Where(x => x.DeviceCode == deviceCode && x.IsDel == 0 && x.CreateTime >= start)
                    .OrderBy(x => x.CreateTime)
                    .ToListAsync();

                return Result<List<TemperatureBoxDataEntity>>.Success(list);
            }
            catch (Exception ex)
            {
                return Result<List<TemperatureBoxDataEntity>>.Error("查询温湿度曲线失败", ex);
            }
        }
    }
}