using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Security.Authentication;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using MongoDB.Bson;
using Mqtt.Client.AspNetCore.Services;
using MyCore.Interfaces.DTO;
using MyCore.Interfaces.Models;
using MyCore.Services;
using MyCore.Services.Devices;
using MyCore.Services.MyControlPanel;

namespace MyCore.Controllers
{
    [Authorize] // TODO Add ROLES (Roles = "Admin")
    [Route("api/device")]
    [ApiController]
    public class DeviceController : ControllerBase
    {
        private DeviceDatabaseService _DeviceDatabaseService;
        private ProviderDatabaseService _ProviderDatabaseService;
        private LocationDatabaseService _LocationDatabaseService;
        private UserDatabaseService _UserDatabaseService;
        private readonly IMqttClientService _mqttClientService;
        //private readonly IMqttOnlineClientService _mqttOnlineClientService;

        public DeviceController(DeviceDatabaseService DeviceDatabaseService, ProviderDatabaseService ProviderDatabaseService, LocationDatabaseService LocationDatabaseService, UserDatabaseService UserDatabaseService, MqttClientServiceProvider provider)//, MqttClientOnlineServiceProvider onlineProvider)
        {
            this._DeviceDatabaseService = DeviceDatabaseService;
            this._ProviderDatabaseService = ProviderDatabaseService;
            this._LocationDatabaseService = LocationDatabaseService;
            this._UserDatabaseService = UserDatabaseService;
            this._mqttClientService = provider.MqttClientService;
            //this._mqttOnlineClientService = onlineProvider.MqttOnlineClientService;
        }

        // GET: Devices
        /// <summary>
        /// Get all devices summary
        /// </summary>
        /// <param name="userId">Id of user</param> 
        [ProducesResponseType(typeof(List<DeviceSummaryDTO>), 200)]
        [HttpGet("{userId}")]
        public ObjectResult GetAll(string userId)
        {
            try
            {
                List<Device> Devices = _DeviceDatabaseService.GetAll(userId);

                List<DeviceSummaryDTO> devicesSummaryDTO = Devices.Select(d => d.ToSummaryDTO()).ToList();

                foreach (var device in devicesSummaryDTO)
                {
                    device.ProviderName = _ProviderDatabaseService.GetById(userId, device.ProviderId).Name;
                }

                return new OkObjectResult(devicesSummaryDTO);
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }

        /// <summary>
        /// Get a specific device info
        /// </summary>
        /// <param name="deviceId">id of device</param>  
        [ProducesResponseType(typeof(DeviceDetailDTO), 200)]
        [HttpGet("detail/{deviceId}")]
        public ObjectResult GetDetail(string deviceId)
        {
            try
            {
                Device device = _DeviceDatabaseService.GetById(deviceId);

                return new OkObjectResult(device.ToDTO());
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }

        /// <summary>
        /// Get list of devices from a type
        /// </summary>
        /// <param name="userId">user Id</param>  
        /// <param name="type">device type</param>  
        [ProducesResponseType(typeof(List<DeviceDetailDTO>), 200)]
        [HttpGet("{userId}/type/{type}")]
        public ObjectResult GetDevicesByType(string userId, DeviceType type)
        {
            try
            {
                if (userId != null)
                {
                    List<Device> devices = _DeviceDatabaseService.GetByType(userId, type);

                    return new OkObjectResult(devices.Select(d => d.ToDTO()));
                }
                else {
                    return new ObjectResult("Invalid parameters") { StatusCode = 400 };
                }
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }

        /// <summary>
        /// Create a device
        /// </summary>
        /// <param name="deviceDetailDTO">Device to create</param>  
        [ProducesResponseType(typeof(DeviceDetailDTO), 200)]
        [HttpPost]
        public ObjectResult Create([FromBody] DeviceDetailDTO deviceDetailDTO)
        {
            try
            {
                if (deviceDetailDTO == null)
                    throw new KeyNotFoundException("Device is null");

                DeviceDetailDTO deviceCreated = DeviceService.CreateOrUpdate(this._DeviceDatabaseService, this._ProviderDatabaseService, this._LocationDatabaseService, deviceDetailDTO.UserId, deviceDetailDTO, true);

                return new OkObjectResult(deviceCreated);
                
            }
            catch (DuplicateWaitObjectException ex)
            {
                return new BadRequestObjectResult(ex.Message) { StatusCode = 400 };
            }
            catch (KeyNotFoundException ex)
            {
                return new BadRequestObjectResult(ex.Message) { StatusCode = 404 };
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }

        /// <summary>
        /// Create devices from provider
        /// </summary>
        /// <param name="userId">User Id</param>  
        /// <param name="providerId">Id of Provider</param>  
        [ProducesResponseType(typeof(List<DeviceDetailDTO>), 200)]
        [HttpPost("{userId}/fromProvider/{providerId}")]
        public async Task<ObjectResult> CreateDevicesFromProvider(string userId, string providerId)
        {
            try
            {
                if (userId == null)
                    throw new InvalidOperationException("User not found");

                if (!UserService.IsExist(_UserDatabaseService, userId))
                    throw new KeyNotFoundException("User not found");

                Provider provider = ProviderService.GetProviderById(this._ProviderDatabaseService, userId, providerId);
                if (provider == null)
                    throw new KeyNotFoundException("Provider not found");

                Dictionary<string, List<DeviceDetailDTO>> devices = await DeviceService.CreateFromProvider(this._DeviceDatabaseService, this._ProviderDatabaseService, this._LocationDatabaseService, userId, provider);

                return new OkObjectResult(devices);
            }
            catch (InvalidOperationException ex)
            {
                return new BadRequestObjectResult(ex.Message) { StatusCode = 400 };
            }
            catch (KeyNotFoundException ex)
            {
                return new BadRequestObjectResult(ex.Message) { StatusCode = 404 };
            }
            catch (AuthenticationException ex)
            {
                return new BadRequestObjectResult(ex.Message) { StatusCode = 401 };
            }
            catch (HttpRequestException ex) // Not ok if not http request.. 
            {
                return new BadRequestObjectResult(ex.Message) { StatusCode = 421 };
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }

        /// <summary>
        /// Get all zigbee2Mqtt devices
        /// </summary>
        /// <param name="userId">User Id</param>  
        [ProducesResponseType(typeof(List<DeviceDetailDTO>), 200)]
        [HttpGet("zigbee2Mqtt/{userId}")]
        public ObjectResult GetDevicesFromZigbee2Mqtt(string userId)
        {
            try
            {
                if (userId == null)
                    throw new InvalidOperationException("User not found");

                if (!UserService.IsExist(_UserDatabaseService, userId))
                    throw new KeyNotFoundException("User not found");

                // GET ALL LOCAL DEVICES
                var devices = MqttClientService.devices; // Be carefull, we only got the exact result after each connection

                return new OkObjectResult(devices);
            }
            catch (InvalidOperationException ex)
            {
                return new BadRequestObjectResult(ex.Message) { StatusCode = 400 };
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }

        /// <summary>
        /// Update a device
        /// </summary>
        /// <param name="deviceDetailDTO">Device to update</param>  
        [ProducesResponseType(typeof(DeviceDetailDTO), 200)]
        [HttpPut("{deviceId}")]
        public ObjectResult Update([FromBody] DeviceDetailDTO deviceDetailDTO)
        {
            try
            {
                if (!_DeviceDatabaseService.IsExist(deviceDetailDTO.Id))
                    throw new KeyNotFoundException("Device does not exist");

                DeviceDetailDTO deviceUpdated = DeviceService.CreateOrUpdate(this._DeviceDatabaseService, this._ProviderDatabaseService, this._LocationDatabaseService, deviceDetailDTO.UserId, deviceDetailDTO, false);

                return new OkObjectResult(deviceUpdated);
            }
            catch (KeyNotFoundException ex)
            {
                return new BadRequestObjectResult(ex.Message) { StatusCode = 404 };
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }

        /// <summary>
        /// Delete a device
        /// </summary>
        /// <param name="deviceId">Id of device to delete</param>  
        [HttpDelete("{deviceId}")]
        public ObjectResult Delete(string deviceId)
        {
            try
            {
                if (deviceId != null)
                {
                    if (_DeviceDatabaseService.IsExist(deviceId))
                    {
                        _DeviceDatabaseService.Remove(deviceId);
                    }
                }

                return new OkObjectResult(201);
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }

        /// <summary>
        /// Delete all device for a specified
        /// </summary>
        /// <param name="userId">Id of user</param>  
        [HttpDelete("user/{userId}")]
        public ObjectResult DeleteAllForUser(string userId)
        {
            try
            {
                if (userId != null)
                {
                    if (_UserDatabaseService.IsExist(userId))
                    {
                        _DeviceDatabaseService.RemoveForUser(userId);
                    }
                }

                return new OkObjectResult(201);
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }
    }
}