using System;
using System.Linq;
using System.Net.Http;
using Application.Domain.Entities;
using Infrastructure.Data;
using Infrastructure.Extensions;
using Infrastructure.Models;
using IoTShared;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.SignalR;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Logging;
using Microsoft.OpenApi.Readers;

namespace IoTNode.Controllers
{
    public class NotifyController : Controller
    {
        private readonly static object thisLock = new object();
        private readonly ILogger<NotifyController> _logger;
        private readonly IConfiguration _configuration;
        private readonly IHttpContextAccessor _httpContextAccessor;
        private readonly IHttpClientFactory _httpClientFactory;
        private readonly IHubContext<PageHub> _pageHubContext;
        private readonly IRepository<Node> _nodeRepo;
        private readonly IRepository<Device> _deviceRepo;
        private readonly IRepository<Sence> _senceRepo;

        public NotifyController(ILogger<NotifyController> logger,
            IConfiguration configuration,
            IHttpContextAccessor httpContextAccessor,
            IHttpClientFactory httpClientFactory,
            IHubContext<PageHub> pageHubContext,
            IRepository<Node> nodeRepo,
            IRepository<Device> deviceRepo,
            IRepository<Sence> senceRepo)
        {
            this._logger = logger;
            this._configuration = configuration;
            this._httpContextAccessor = httpContextAccessor;
            this._httpClientFactory = httpClientFactory;
            this._pageHubContext = pageHubContext;
            this._nodeRepo = nodeRepo;
            this._deviceRepo = deviceRepo;
            this._senceRepo = senceRepo;
        }

        public IActionResult Index(NotifyModel model)
        {
            if (ModelState.IsValid)
            {
                var device = this._deviceRepo.Table()
                    .Include(o => o.Data)
                    .Include(o => o.Apis).ThenInclude(o => o.Parameters)
                    .FirstOrDefault(o => o.Number == model.Number);
                var node = this._nodeRepo.ReadOnlyTable().FirstOrDefault();
                try
                {
                    if (node == null)
                    {
                        node = new Node
                        {
                            Name = this._configuration["name"],
                            Number = Helper.Instance.GetMacAddress()
                        };
                        this._nodeRepo.Add(node);
                        this._nodeRepo.SaveChanges();
                    }
                    if (device == null)
                    {
                        device = new Device
                        {
                            NodeId = node.Id,
                            DisplayName = model.Name
                        };
                        this._deviceRepo.Add(device);
                    }
                    UpdateDeviceFromModel(device, model);
                    this._deviceRepo.SaveChanges();
                    device.Node = node;
                    UpdatePage(device);
                    this.SendDeviceDataToServer(device);
                    return new JsonResult("Succeed");
                }
                catch (Exception ex)
                {
                    ex.PrintStack();
                    return new JsonResult(ex.Message);
                }
            }
            return new JsonResult(new { message = "invalid", model });
        }

        private void UpdateDeviceFromModel(Device device, NotifyModel model)
        {
            if (model.Data.Count > 0)
            {
                //foreach (var key in device.Data.Select(o => o.Key).ToList())
                //{
                //    if (!model.Data.Any(o => o.Key == key))
                //    {
                //        var data = device.Data.FirstOrDefault(o => o.Key == key);
                //        device.Data.Remove(data);
                //    }
                //}
                foreach (var newData in model.Data)
                {
                    var data = device.Data.FirstOrDefault(o => o.Key == newData.Key);
                    if (data == null)
                    {
                        data = new Data();
                        device.Data.Add(data);
                    }
                    data.FromPlain(newData);
                    data.Timestamp = model.Timestamp;
                }
            }
            if (string.IsNullOrEmpty(device.ApiJson))
            {
                var url = model.BaseUrl + model.ApiPath;
                Console.WriteLine($"notify>api url:{url}");
                var task = this._httpClientFactory.CreateClient().GetAsync(url);
                task.Wait();
                using (var result = task.Result)
                {
                    using (var content = result.Content)
                    {
                        device.ApiJson = content.ReadAsStringAsync().Result;
                        this.UpdateApi(device);
                    }
                }
            }
            device.FromPlain(model);
        }

        private void UpdateApi(Device device)
        {
            var reader = new OpenApiStringReader(new OpenApiReaderSettings { }).Read(device.ApiJson, out OpenApiDiagnostic diagnostic);
            foreach (var path in reader.Paths)
            {
                foreach (var operation in path.Value.Operations)
                {
                    if (!device.Apis.Any(o => o.Name == operation.Value.Summary))
                    {
                        var postion = path.Key.LastIndexOf('/') + 1;
                        var api = new Api
                        {
                            Path = path.Key.Substring(0, postion),
                            Command = path.Key.Substring(postion),
                            Name = operation.Value.Summary,
                            Method = operation.Key.ToString()
                        };
                        device.Apis.Add(api);
                        foreach (var name in api.Parameters.Select(o => o.Name).ToList())
                        {
                            if (operation.Value.Parameters.Any(o => o.Name == name))
                            {
                                var parameter = api.Parameters.FirstOrDefault(o => o.Name == name);
                                api.Parameters.Remove(parameter);
                            }
                        }
                        foreach (var parameter in operation.Value.Parameters.Where(o => o.Name != "id"))
                        {
                            if (!api.Parameters.Any(o => o.Name == parameter.Name))
                            {
                                api.Parameters.Add(new Parameter
                                {
                                    Name = parameter.Name,
                                    Description = parameter.Description,
                                    Required = parameter.Required,
                                    Type = parameter.Schema.Type,
                                    Minimum = parameter.Schema.Minimum?.ToString(),
                                    Maxinum = parameter.Schema.Maximum?.ToString()
                                });
                            }
                        }
                    }
                }
            }
        }

        private void UpdatePage(Device device)
        {
            var data = device.ToJson();
            this._pageHubContext.Clients.Group("page").SendAsync("UpdateDevice", data);
        }

        private void SendDeviceDataToServer(Device device)
        {
            if (!this._configuration.GetValue<bool>("notify:enabled"))
            {
                return;
            }
            var schoolUrl = $"http://{this._configuration["notify:host"]}/Notify";
            var data = device.ToJson();
            try
            {
                var task = this._httpClientFactory.CreateClient().PostAsync(schoolUrl, new StringContent(data));
                task.Wait();
                using (var response = task.Result)
                {
                    using (var content = response.Content)
                    {
                        var result = content.ReadAsStringAsync().Result;
                        Console.WriteLine($"server response:{schoolUrl}:{result}");
                    }
                }
            }
            catch (Exception ex)
            {
                ex.PrintStack();
            }
        }
    }
}