/*
 *接口编写处...
*如果接口需要做Action的权限验证，请在Action上使用属性
*如: [ApiActionPermission("base_device",Enums.ActionPermissionOptions.Search)]
 */
using Microsoft.AspNetCore.Mvc;
using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.AspNetCore.Http;
using VolPro.Entity.DomainModels;
using Warehouse.IServices;

namespace Warehouse.Controllers
{
    public partial class base_deviceController
    {
        private readonly Ibase_deviceService _service;//访问业务代码
        private readonly IHttpContextAccessor _httpContextAccessor;

        [ActivatorUtilitiesConstructor]
        public base_deviceController(
            Ibase_deviceService service,
            IHttpContextAccessor httpContextAccessor
        )
        : base(service)
        {
            _service = service;
            _httpContextAccessor = httpContextAccessor;
        }
        [ActivatorUtilitiesConstructor]
        public base_deviceController(
            Ibase_deviceService service,
            IHttpContextAccessor httpContextAccessor
        )
        : base(service)
        {
            _service = service;
            _httpContextAccessor = httpContextAccessor;
        }

        private Iwarehouse_regionsService GetRegionService() =>
            _service.ServiceProvider.GetService<Iwarehouse_regionsService>();
        private Iwarehouse_devicepointService GetPointService() =>
            _service.ServiceProvider.GetService<Iwarehouse_devicepointService>();

        /// <summary>区域树 (区域→点位→设备数量)</summary>
        [HttpGet]
        [Route("/api/DeviceManager/GetRegionTree")]
        public async Task<IActionResult> GetRegionTree()
        {
            var regions = await GetRegionService().FindAsIQueryable(x => true)
                .Select(x => new { x.RegionsId, x.RegionsName, x.ParentId })
                .ToListAsync();
            var points = await GetPointService().FindAsIQueryable(x => true)
                .Select(x => new { x.DevicePointId, x.DevicePointName, x.RegionId })
                .ToListAsync();
            var deviceCounts = await _service.FindAsIQueryable(x => true)
                .GroupBy(x => x.PointId)
                .Select(g => new { PointId = g.Key, Count = g.Count() })
                .ToListAsync();

            return Ok(BuildRegionTree(regions, points, deviceCounts));
        }

        private List<RegionTreeNode> BuildRegionTree(
            List<dynamic> regions, List<dynamic> points, List<dynamic> deviceCounts)
        {
            var pointMap = points.GroupBy(p => (int?)p.RegionId)
                .ToDictionary(g => g.Key ?? 0, g => g.ToList());
            var countMap = deviceCounts.ToDictionary(c => c.PointId ?? 0, c => c.Count);

            return regions.Where(r => r.ParentId == null || r.ParentId == 0).Select(r =>
                BuildNode(r, regions, pointMap, countMap)).ToList();
        }

        private RegionTreeNode BuildNode(dynamic region, List<dynamic> allRegions,
            Dictionary<int, List<dynamic>> pointMap, Dictionary<int, int> countMap)
        {
            int rid = (int)region.RegionsId;
            pointMap.TryGetValue(rid, out var pts);
            var children = allRegions.Where(r => (int?)r.ParentId == rid).Select(r =>
                BuildNode(r, allRegions, pointMap, countMap)).ToList();

            var pointNodes = pts?.Select(p => new RegionTreeNode
            {
                Id = $"p_{(int)p.DevicePointId}",
                Label = (string)p.DevicePointName,
                Type = "point",
                DeviceCount = countMap.GetValueOrDefault((int)p.DevicePointId, 0)
            }).ToList() ?? new List<RegionTreeNode>();

            children.AddRange(pointNodes);

            return new RegionTreeNode
            {
                Id = $"r_{rid}",
                Label = (string)region.RegionsName,
                Type = "region",
                DeviceCount = children.Sum(c => c.DeviceCount),
                Children = children
            };
        }

        /// <summary>点位下设备列表(含子设备)</summary>
        [HttpGet]
        [Route("/api/DeviceManager/GetDevicesByPoint")]
        public async Task<IActionResult> GetDevicesByPoint([FromQuery] int pointId, [FromQuery] int page = 1, [FromQuery] int size = 20)
        {
            var query = _service.FindAsIQueryable(x => x.PointId == pointId);
            var total = await query.CountAsync();
            var items = await query.Skip((page - 1) * size).Take(size).ToListAsync();
            return Ok(new { items, total });
        }

        /// <summary>获取网关所管的顶层设备 (供 Register 调用)</summary>
        internal async Task<List<object>> GetDevicesForGateway(int nodeId)
        {
            var items = await _service.FindAsIQueryable(x => x.GatewayNodeId == nodeId && x.ParentDeviceId == null)
                .Select(x => new {
                    x.DeviceId, x.DeviceName, x.AdapterCode, x.SourceId,
                    x.DeviceCategory, x.DeviceGroup, x.IsParent, x.IsOnline,
                    x.ExtraData
                }).ToListAsync();
            return items.Select(x => (object)x).ToList();
        }
    }

    public class RegionTreeNode
    {
        public string Id { get; set; } = "";
        public string Label { get; set; } = "";
        public string Type { get; set; } = "";
        public int DeviceCount { get; set; }
        public List<RegionTreeNode> Children { get; set; } = new();
    }
}