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.Service.Controllers
{
    [Authorize] // TODO Add ROLES (Roles = "Admin")
    [Route("api/room")]
    [ApiController]
    public class RoomController : ControllerBase
    {
        private UserDatabaseService _UserDatabaseService;
        private RoomDatabaseService _RoomDatabaseService;
        private DeviceDatabaseService _DeviceDatabaseService;
        private readonly IMqttClientService _mqttClientService;
        //private readonly IMqttOnlineClientService _mqttOnlineClientService;

        public RoomController(UserDatabaseService userDatabaseService, RoomDatabaseService roomDatabaseService, DeviceDatabaseService deviceDatabaseService, MqttClientServiceProvider provider)//, MqttClientOnlineServiceProvider onlineProvider)
        {
            this._UserDatabaseService = userDatabaseService;
            this._RoomDatabaseService = roomDatabaseService;
            this._DeviceDatabaseService = deviceDatabaseService;
            this._mqttClientService = provider.MqttClientService;
            //this._mqttOnlineClientService = onlineProvider.MqttOnlineClientService;
        }

        /// <summary>
        /// Get all rooms for the specified user
        /// </summary>
        /// <param name="userId">Id of user</param> 
        [ProducesResponseType(typeof(List<RoomSummaryDTO>), 200)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpGet("{userId}")]
        public ObjectResult GetAll(string userId)
        {
            try
            {
                List<Room> Rooms = _RoomDatabaseService.GetAll(userId);

                List<RoomSummaryDTO> roomsSummaryDTO = Rooms.Select(d => d.ToSummaryDTO()).ToList();

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

        /// <summary>
        /// Get detail info of a specified room
        /// </summary>
        /// <param name="userId">user id</param>  
        /// <param name="roomId">room id</param>  
        [ProducesResponseType(typeof(RoomDetailDTO), 200)]
        [ProducesResponseType(typeof(string), 400)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpGet("detail/{roomId}")]
        public ObjectResult GetDetail(string userId, string roomId)
        {
            try
            {
                if (userId == null || roomId == null)
                    throw new ArgumentNullException("Incorrect parameters");

                Room room = _RoomDatabaseService.GetById(roomId);
                if (room == null)
                    throw new KeyNotFoundException("Room does not exist");
                List<Device> devices = _DeviceDatabaseService.GetByLocation(room.UserId, roomId);

                return new OkObjectResult(room.ToDTO(devices.Select(d => d.ToDTO()).ToList()));

            }
            catch (ArgumentNullException ex)
            {
                return new BadRequestObjectResult(ex.Message) { };
            }
            catch (KeyNotFoundException ex)
            {
                return new NotFoundObjectResult(ex.Message) { };
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }

        /// <summary>
        /// Create a room
        /// </summary>
        /// <param name="roomCreateOrUpdateDetail">Room to create</param>  
        [ProducesResponseType(typeof(RoomDetailDTO), 200)]
        [ProducesResponseType(typeof(string), 400)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpPost]
        public ObjectResult Create([FromBody] RoomCreateOrUpdateDetailDTO roomCreateOrUpdateDetail)
        {
            try
            {
                if (roomCreateOrUpdateDetail == null)
                    throw new ArgumentNullException("Incorrect parameters");

                RoomDetailDTO roomCreated = RoomService.CreateOrUpdate(this._RoomDatabaseService, this._DeviceDatabaseService, roomCreateOrUpdateDetail.UserId, roomCreateOrUpdateDetail, true);

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

        /// <summary>
        /// Update a room
        /// </summary>
        /// <param name="roomCreateOrUpdateDetail">room to update</param>  
        [ProducesResponseType(typeof(RoomCreateOrUpdateDetailDTO), 200)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpPut]
        public ObjectResult Update([FromBody] RoomCreateOrUpdateDetailDTO roomCreateOrUpdateDetail)
        {
            try
            {
                if (!_RoomDatabaseService.IsExist(roomCreateOrUpdateDetail.Id))
                    throw new KeyNotFoundException("Room does not exist");

                RoomDetailDTO roomUpdated = RoomService.CreateOrUpdate(this._RoomDatabaseService, this._DeviceDatabaseService, roomCreateOrUpdateDetail.UserId, roomCreateOrUpdateDetail, false);

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

        /// <summary>
        /// Delete device from a room
        /// </summary>
        /// <param name="deviceId">Id of device to delete from the room</param> 
        /// <param name="roomId">Id of room </param>  
        [ProducesResponseType(typeof(string), 202)]
        [ProducesResponseType(typeof(string), 400)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpDelete("{roomId}/device/{deviceId}")]
        public ObjectResult Delete(string deviceId, string roomId)
        {
            try
            {
                if (roomId == null && deviceId == null)
                    throw new ArgumentNullException("Incorrect parameters");

                if (!_RoomDatabaseService.IsExist(roomId))
                    throw new KeyNotFoundException("Room does not exist");

                // Update room
                Room room = _RoomDatabaseService.GetById(roomId);
                room.DevicesIds = room.DevicesIds.Where(d => d != deviceId).ToList();
                room.UpdatedDate = DateTime.Now;
                _RoomDatabaseService.Update(room);

                // Update device
                Device device = _DeviceDatabaseService.GetById(deviceId);

                if (device == null) 
                    throw new KeyNotFoundException("Device does not exist");

                device.LocationId = null;
                device.UpdatedDate = DateTime.Now;
                _DeviceDatabaseService.Update(device);
                

                return new OkObjectResult("Device has been removed from specified room") { StatusCode = 202 };
            }
            catch (ArgumentNullException ex)
            {
                return new BadRequestObjectResult(ex.Message) { };
            }
            catch (KeyNotFoundException ex)
            {
                return new NotFoundObjectResult(ex.Message) { };
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }

        /// <summary>
        /// Delete a room
        /// </summary>
        /// <param name="roomId">Id of room to delete</param>  
        [ProducesResponseType(typeof(string), 202)]
        [ProducesResponseType(typeof(string), 400)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpDelete("{roomId}")]
        public ObjectResult Delete(string roomId)
        {
            try
            {
                if (roomId == null)
                    throw new ArgumentNullException("Incorrect parameters");

                if (!_RoomDatabaseService.IsExist(roomId))
                    throw new KeyNotFoundException("Room does not exist");
                
                Room room = _RoomDatabaseService.GetById(roomId);
                // Delete location from all devices
                List<Device> devices = _DeviceDatabaseService.GetByLocation(room.UserId, roomId);
                foreach (var device in devices)
                {
                    device.LocationId = null;
                    device.UpdatedDate = DateTime.Now;
                    _DeviceDatabaseService.Update(device);
                }
                // Delete room
                _RoomDatabaseService.Remove(roomId);
                
                return new OkObjectResult("Room has been successfully deleted") { StatusCode = 202 };
            }
            catch (ArgumentNullException ex)
            {
                return new BadRequestObjectResult(ex.Message) { };
            }
            catch (KeyNotFoundException ex)
            {
                return new NotFoundObjectResult(ex.Message) { };
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }

        /// <summary>
        /// Delete all room for a specified user
        /// </summary>
        /// <param name="userId">Id of user</param>  
        [ProducesResponseType(typeof(string), 202)]
        [ProducesResponseType(typeof(string), 400)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpDelete("user/{userId}")]
        public ObjectResult DeleteAllForUser(string userId)
        {
            try
            {
                if (userId == null)
                    throw new ArgumentNullException("Incorrect parameters");

                if (!_UserDatabaseService.IsExist(userId))
                    throw new KeyNotFoundException("User does not exist");

                _RoomDatabaseService.RemoveForUser(userId);
                    
                return new OkObjectResult("All room associated to specified user has been removed") { StatusCode = 202 };
            }
            catch (ArgumentNullException ex)
            {
                return new BadRequestObjectResult(ex.Message) { };
            }
            catch (KeyNotFoundException ex)
            {
                return new NotFoundObjectResult(ex.Message) { };
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }
    }
}