using Model;
using Model.Dto.Config;
using Model.Entity.Config;
using Model.Mapper;
using ORM;
using Service.Interface;
using Service.Interface.Config;
using SqlSugar;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.Json;
using System.Threading.Tasks;

namespace Service.Implement.Config
{
    /// <summary>
    /// IOT设备管理 服务实现
    /// </summary>
    public class DeviceService : IDeviceService
    {
        private readonly IAuditRecorder _audit;

        public DeviceService(IAuditRecorder audit)
        {
            _audit = audit;
        }

        /// <summary>
        /// 分页查询设备列表（支持关键字搜索编号/名称/类型，可按所属产品筛选）
        /// </summary>
        public async Task<Result<List<IotDeviceDto>>> GetPagedAsync(int pageIndex, int pageSize, RefAsync<int> total, string? keyword, long? productId = null, long? gatewayId = null)
        {
            try
            {
                var list = await SqlSugarContext.DbContext.Queryable<IotDeviceEntity>()
                    .Where(x => x.IsDel == 0)
                    .WhereIF(!string.IsNullOrWhiteSpace(keyword),
                        x => x.Code.Contains(keyword!) || x.Name.Contains(keyword!) || x.DeviceType.Contains(keyword!))
                    .WhereIF(productId.HasValue && productId.Value > 0, x => x.ProductId == productId!.Value)
                    .WhereIF(gatewayId.HasValue && gatewayId.Value > 0, x => x.GatewayId == gatewayId!.Value)
                    .OrderBy(x => x.CreateTime, OrderByType.Desc)
                    .ToPageListAsync(pageIndex, pageSize, total);

                var dtos = list.ToDtoList();
                await FillProductNames(dtos);
                await FillGatewayNames(dtos);
                return Result<List<IotDeviceDto>>.Success(dtos);
            }
            catch (Exception ex)
            {
                return Result<List<IotDeviceDto>>.Error("查询设备列表失败", ex);
            }
        }

        /// <summary>
        /// 根据 Id 获取设备详情
        /// </summary>
        public async Task<Result<IotDeviceDto>> GetByIdAsync(long id)
        {
            try
            {
                var entity = await SqlSugarContext.DbContext.Queryable<IotDeviceEntity>()
                    .Where(x => x.Id == id && x.IsDel == 0)
                    .FirstAsync();
                if (entity == null)
                    return Result<IotDeviceDto>.Error("设备不存在或已被删除");

                var dto = entity.ToDto();
                await FillProductNames(new List<IotDeviceDto> { dto });
                await FillGatewayNames(new List<IotDeviceDto> { dto });
                return Result<IotDeviceDto>.Success(dto);
            }
            catch (Exception ex)
            {
                return Result<IotDeviceDto>.Error("查询设备详情失败", ex);
            }
        }

        /// <summary>
        /// 新增设备（校验编号唯一性）
        /// </summary>
        public async Task<Result> AddAsync(IotDeviceDto dto)
        {
            if (dto == null || string.IsNullOrWhiteSpace(dto.Code))
                return Result.Error("设备编号不能为空");
            if (string.IsNullOrWhiteSpace(dto.Name))
                return Result.Error("设备名称不能为空");

            try
            {
                bool exists = await SqlSugarContext.DbContext.Queryable<IotDeviceEntity>()
                    .AnyAsync(x => x.Code == dto.Code && x.IsDel == 0);
                if (exists)
                    return Result.Error($"设备编号【{dto.Code}】已存在");

                var entity = dto.ToEntity();
                entity.CreateTime = DateTime.Now;
                // 初始离线
                entity.OnlineStatus = IotDeviceOnlineStatusEnum.Offline;
                await SqlSugarContext.DbContext.Insertable(entity).ExecuteCommandAsync();

                await _audit.RecordAsync("Create", "IotDevice", entity.Id, entity.Id,
                    null, JsonSerializer.Serialize(new { entity.Code, entity.Name, entity.DeviceType, entity.GatewayId, entity.SlaveId }),
                    description: $"新增设备 {entity.Code}（{entity.Name}）");
                return Result.Success();
            }
            catch (Exception ex)
            {
                return Result.Error("新增设备失败", ex);
            }
        }

        /// <summary>
        /// 修改设备（在线状态等运行字段不允许被前端覆盖）
        /// </summary>
        public async Task<Result> UpdateAsync(IotDeviceDto dto)
        {
            var entity = dto?.ToEntity();
            if (entity == null || entity.Id <= 0)
                return Result.Error("设备Id无效");

            try
            {
                // 编号变更时校验唯一性
                bool exists = await SqlSugarContext.DbContext.Queryable<IotDeviceEntity>()
                    .AnyAsync(x => x.Code == entity.Code && x.IsDel == 0 && x.Id != entity.Id);
                if (exists)
                    return Result.Error($"设备编号【{entity.Code}】已存在");

                // 操作前值（审计）：先查旧记录
                var oldEntity = await SqlSugarContext.DbContext.Queryable<IotDeviceEntity>()
                    .Where(x => x.Id == entity.Id).FirstAsync();

                await SqlSugarContext.DbContext.Updateable(entity)
                    .IgnoreColumns(x => new { x.CreateTime, x.IsDel, x.OnlineStatus, x.LastCollectTime, x.LastError })
                    .ExecuteCommandAsync();

                await _audit.RecordAsync("Update", "IotDevice", entity.Id, entity.Id,
                    oldValue: oldEntity == null ? null : JsonSerializer.Serialize(new { oldEntity.Code, oldEntity.Name, oldEntity.DeviceType, oldEntity.GatewayId, oldEntity.SlaveId }),
                    newValue: JsonSerializer.Serialize(new { entity.Code, entity.Name, entity.DeviceType, entity.GatewayId, entity.SlaveId }),
                    description: $"修改设备 {entity.Code}（{entity.Name}）");
                return Result.Success();
            }
            catch (Exception ex)
            {
                return Result.Error("修改设备失败", ex);
            }
        }

        /// <summary>
        /// 删除设备（软删除：IsDel 置 1）
        /// </summary>
        public async Task<Result> DeleteAsync(long id)
        {
            if (id <= 0)
                return Result.Error("设备Id无效");

            try
            {
                var oldEntity = await SqlSugarContext.DbContext.Queryable<IotDeviceEntity>()
                    .Where(x => x.Id == id && x.IsDel == 0).FirstAsync();

                await SqlSugarContext.DbContext.Updateable<IotDeviceEntity>()
                    .SetColumns(x => x.IsDel == 1)
                    .Where(x => x.Id == id)
                    .ExecuteCommandAsync();

                await _audit.RecordAsync("Delete", "IotDevice", id, id,
                    oldValue: oldEntity == null ? null : JsonSerializer.Serialize(new { oldEntity.Code, oldEntity.Name }),
                    description: $"删除设备 {oldEntity?.Code}（{oldEntity?.Name}）");
                return Result.Success();
            }
            catch (Exception ex)
            {
                return Result.Error("删除设备失败", ex);
            }
        }

        /// <summary>
        /// 分页查询指定设备的日志（设备独享日志）
        /// </summary>
        public async Task<Result<List<DeviceLogDto>>> GetDeviceLogsAsync(long deviceId, int pageIndex, int pageSize, RefAsync<int> total)
        {
            try
            {
                var list = await SqlSugarContext.DbContext.Queryable<DeviceLogEntity>()
                    .Where(x => x.DeviceId == deviceId && x.IsDel == 0)
                    .OrderBy(x => x.LogTime, OrderByType.Desc)
                    .ToPageListAsync(pageIndex, pageSize, total);

                return Result<List<DeviceLogDto>>.Success(list.ToDtoList());
            }
            catch (Exception ex)
            {
                return Result<List<DeviceLogDto>>.Error("查询设备日志失败", ex);
            }
        }

        /// <summary>
        /// 给设备 DTO 填充所属网关名称（GatewayName 展示用）
        /// </summary>
        private async Task FillGatewayNames(List<IotDeviceDto> dtos)
        {
            if (dtos == null || dtos.Count == 0)
                return;

            var ids = dtos.Where(x => long.TryParse(x.GatewayId, out var gid) && gid > 0)
                          .Select(x => long.Parse(x.GatewayId!)).Distinct().ToList();
            if (ids.Count == 0)
                return;

            var gateways = await SqlSugarContext.DbContext.Queryable<GatewayEntity>()
                .Where(x => ids.Contains(x.Id) && x.IsDel == 0)
                .ToListAsync();
            var map = gateways.ToDictionary(g => g.Id, g => $"{g.Code}({g.Name})");

            foreach (var d in dtos)
            {
                if (long.TryParse(d.GatewayId, out var gid) && map.TryGetValue(gid, out var name))
                    d.GatewayName = name;
            }
        }

        /// <summary>
        /// 给设备 DTO 填充所属产品的型号/名称（ProductName 展示用）
        /// </summary>
        private async Task FillProductNames(List<IotDeviceDto> dtos)
        {
            if (dtos == null || dtos.Count == 0)
                return;

            var ids = dtos.Where(x => long.TryParse(x.ProductId, out var pid) && pid > 0)
                          .Select(x => long.Parse(x.ProductId!)).Distinct().ToList();
            if (ids.Count == 0)
                return;

            var products = await SqlSugarContext.DbContext.Queryable<ProductEntity>()
                .Where(x => ids.Contains(x.Id) && x.IsDel == 0)
                .ToListAsync();
            var map = products.ToDictionary(p => p.Id, p => p.Name ?? p.Model);

            foreach (var d in dtos)
            {
                if (long.TryParse(d.ProductId, out var pid) && map.TryGetValue(pid, out var name))
                    d.ProductName = name;
            }
        }
    }
}