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.Service.Services;
using MyCore.Services;
using MyCore.Services.Devices;
using MyCore.Services.MyControlPanel;

namespace MyCore.Service.Controllers
{
    [Authorize] // TODO Add ROLES (Roles = "Admin")
    [Route("api/alarm")]
    [ApiController]
    public class AlarmController : ControllerBase
    {
        private UserDatabaseService _UserDatabaseService;
        private RoomDatabaseService _RoomDatabaseService;
        private DeviceDatabaseService _DeviceDatabaseService;
        private AlarmDatabaseService _AlarmDatabaseService;
        private HomeDatabaseService _HomeDatabaseService;
        private readonly IMqttClientService _mqttClientService;
        //private readonly IMqttOnlineClientService _mqttOnlineClientService;

        public AlarmController(UserDatabaseService userDatabaseService, RoomDatabaseService roomDatabaseService, DeviceDatabaseService deviceDatabaseService, AlarmDatabaseService alarmDatabaseService, HomeDatabaseService homeDatabaseService, MqttClientServiceProvider provider)//, MqttClientOnlineServiceProvider onlineProvider)
        {
            this._UserDatabaseService = userDatabaseService;
            this._RoomDatabaseService = roomDatabaseService;
            this._DeviceDatabaseService = deviceDatabaseService;
            this._AlarmDatabaseService = alarmDatabaseService;
            this._HomeDatabaseService = homeDatabaseService;
            this._mqttClientService = provider.MqttClientService;
            //this._mqttOnlineClientService = onlineProvider.MqttOnlineClientService;
        }

        /// <summary>
        /// Get all alarm modes for the specified home
        /// </summary>
        /// <param name="homeId">Home Id</param> 
        [ProducesResponseType(typeof(List<AlarmModeDTO>), 200)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpGet("{homeId}")]
        public ObjectResult GetAll(string homeId)
        {
            try
            {
                List<AlarmMode> alarmModes = _AlarmDatabaseService.GetAll(homeId);

                List<AlarmModeDTO> alarmModesDTO = alarmModes.Select(a => a.ToDTO()).ToList();

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

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

                AlarmMode alarmMode = _AlarmDatabaseService.GetById(alarmModeId);
                if (alarmMode == null)
                    throw new KeyNotFoundException("Alarm does not exist");

                List<Device> devices = new List<Device>();
                foreach (var deviceId in alarmMode.DevicesIds) {
                    Device device = _DeviceDatabaseService.GetById(deviceId);
                    if (device != null)
                    {
                        devices.Add(device);
                    }
                }

                return new OkObjectResult(alarmMode.ToDetailDTO(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 an alarm mode
        /// </summary>
        /// <param name="alarmModeCreateOrUpdateDetailDTO">Alarm mode to create</param>  
        [ProducesResponseType(typeof(AlarmModeDetailDTO), 200)]
        [ProducesResponseType(typeof(string), 400)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpPost]
        public ObjectResult Create([FromBody] AlarmModeCreateOrUpdateDetailDTO alarmModeCreateOrUpdateDetailDTO)
        {
            try
            {
                if (alarmModeCreateOrUpdateDetailDTO == null)
                    throw new ArgumentNullException("Incorrect parameters");

                AlarmModeDetailDTO alarmModeCreated = AlarmService.CreateOrUpdate(this._AlarmDatabaseService, this._DeviceDatabaseService, alarmModeCreateOrUpdateDetailDTO.HomeId, alarmModeCreateOrUpdateDetailDTO, true);

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

        /// <summary>
        /// Create default alarm modes
        /// </summary>
        /// <param name="homeId">Home Id</param>  
        [ProducesResponseType(typeof(bool), 202)]
        [ProducesResponseType(typeof(string), 400)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 409)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpPost("defaults/{homeId}")]
        public ObjectResult CreateDefaultAlarms (string homeId) 
        {
            try
            {
                if (homeId == null)
                    throw new ArgumentNullException("Incorrect parameters");

                Home home = _HomeDatabaseService.GetById(homeId);
                if (home == null)
                    throw new KeyNotFoundException("Home does not exist");

                List<AlarmMode> alarmModes = _AlarmDatabaseService.GetAll(homeId);
                if (alarmModes.Where(a => a.IsDefault).Count() == 5)
                    throw new SystemException("Default modes already existing");

                return new ObjectResult(AlarmService.CreateDefaultAlarmModes(_HomeDatabaseService, _AlarmDatabaseService, home)) { StatusCode = 202 };
            }
            catch (ArgumentNullException ex)
            {
                return new BadRequestObjectResult(ex.Message) { };
            }
            catch (KeyNotFoundException ex)
            {
                return new NotFoundObjectResult(ex.Message) { };
            }
            catch (SystemException ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 409 };
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }

        /// <summary>
        /// Activate specified alarm mode
        /// </summary>
        /// <param name="alarmModeId">Alarm mode to activate</param>  
        [ProducesResponseType(typeof(string), 202)]
        [ProducesResponseType(typeof(string), 400)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 409)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpPost("activate/{alarmModeId}")]
        public ObjectResult Activate(string alarmModeId)
        {
            try
            {
                if (alarmModeId == null)
                    throw new ArgumentNullException("Incorrect parameters");

                AlarmMode alarmMode = _AlarmDatabaseService.GetById(alarmModeId);
                if (alarmMode == null)
                    throw new KeyNotFoundException("Alarm mode does not exist");

                if (alarmMode.Activated)
                    throw new AccessViolationException("This alarm mode is already activated");

                bool successfull = AlarmService.Activate(_AlarmDatabaseService, alarmMode, _HomeDatabaseService);

                return new OkObjectResult($"Alarm mode {alarmMode.Name} has been successfully activated") { StatusCode = 202 };
            }
            catch (ArgumentNullException ex)
            {
                return new BadRequestObjectResult(ex.Message) { };
            }
            catch (KeyNotFoundException ex)
            {
                return new NotFoundObjectResult(ex.Message) { };
            }
            catch (AccessViolationException ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 409 };
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }

        /// <summary>
        /// Update an alarm mode
        /// </summary>
        /// <param name="alarmModeCreateOrUpdateDetailDTO">alarm mode to update</param>  
        [ProducesResponseType(typeof(AlarmModeDetailDTO), 200)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpPut]
        public ObjectResult Update([FromBody] AlarmModeCreateOrUpdateDetailDTO alarmModeCreateOrUpdateDetailDTO)
        {
            try
            {
                if (!_AlarmDatabaseService.IsExist(alarmModeCreateOrUpdateDetailDTO.Id))
                    throw new KeyNotFoundException("This alarm mode does not exist");

                AlarmModeDetailDTO alarmModeUpdated = AlarmService.CreateOrUpdate(this._AlarmDatabaseService, this._DeviceDatabaseService, alarmModeCreateOrUpdateDetailDTO.HomeId, alarmModeCreateOrUpdateDetailDTO, false);

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

        /// <summary>
        /// Delete an alarm mode
        /// </summary>
        /// <param name="alarmModeId">Id of alarm mode to delete</param>  
        [ProducesResponseType(typeof(string), 202)]
        [ProducesResponseType(typeof(string), 400)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 405)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpDelete("{alarmModeId}")]
        public ObjectResult Delete(string alarmModeId)
        {
            try
            {
                if (alarmModeId == null)
                    throw new ArgumentNullException("Incorrect parameters");

                if (!_AlarmDatabaseService.IsExist(alarmModeId))
                    throw new KeyNotFoundException("This alarm mode does not exist");

                AlarmMode alarmMode = _AlarmDatabaseService.GetById(alarmModeId);

                if (alarmMode.IsDefault)
                    throw new NotSupportedException("This alarm mode cannot be deleted");

                // Delete alarm
                _AlarmDatabaseService.Remove(alarmModeId);

                return new OkObjectResult("Alarm mode has been successfully deleted") { StatusCode = 202 };
            }
            catch (ArgumentNullException ex)
            {
                return new BadRequestObjectResult(ex.Message) { };
            }
            catch (KeyNotFoundException ex)
            {
                return new NotFoundObjectResult(ex.Message) { };
            }
            catch (NotSupportedException ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 405 };
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }

        /// <summary>
        /// Delete all alarm mode for a specified home
        /// </summary>
        /// <param name="homeId">Home Id</param>  
        [ProducesResponseType(typeof(string), 202)]
        [ProducesResponseType(typeof(string), 400)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpDelete("home/{homeId}")]
        public ObjectResult DeleteAllForHome(string homeId)
        {
            try
            {
                if (homeId == null)
                    throw new ArgumentNullException("Incorrect parameters");

                if (!_HomeDatabaseService.IsExist(homeId))
                    throw new KeyNotFoundException("Home does not exist");

                _AlarmDatabaseService.RemoveForHome(homeId);

                return new OkObjectResult("All alarm mode associated to specified home 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 };
            }
        }
    }
}