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/group")]
    [ApiController]
    public class GroupController : ControllerBase
    {
        private UserDatabaseService _UserDatabaseService;
        private GroupDatabaseService _GroupDatabaseService;
        private DeviceDatabaseService _DeviceDatabaseService;
        private ProviderDatabaseService _ProviderDatabaseService;
        private readonly IMqttClientService _mqttClientService;
        //private readonly IMqttOnlineClientService _mqttOnlineClientService;

        public GroupController(UserDatabaseService userDatabaseService, GroupDatabaseService groupDatabaseService, DeviceDatabaseService deviceDatabaseService, ProviderDatabaseService providerDatabaseService, MqttClientServiceProvider provider)//, MqttClientOnlineServiceProvider onlineProvider)
        {
            this._UserDatabaseService = userDatabaseService;
            this._GroupDatabaseService = groupDatabaseService;
            this._DeviceDatabaseService = deviceDatabaseService;
            this._ProviderDatabaseService = providerDatabaseService;
            this._mqttClientService = provider.MqttClientService;
            //this._mqttOnlineClientService = onlineProvider.MqttOnlineClientService;
        }

        /// <summary>
        /// Get all groups for the specified user
        /// </summary>
        /// <param name="userId">Id of user</param> 
        [ProducesResponseType(typeof(List<GroupSummaryDTO>), 200)]
        [HttpGet("{userId}")]
        public ObjectResult GetAll(string userId)
        {
            try
            {
                List<Group> Groups = _GroupDatabaseService.GetAll(userId);

                List<GroupSummaryDTO> groupsSummaryDTO = Groups.Select(d => d.ToSummaryDTO()).ToList();

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

        /// <summary>
        /// Get detail info of a specified group
        /// </summary>
        /// <param name="userId">user id</param>  
        /// <param name="groupId">groupid</param>  
        [ProducesResponseType(typeof(GroupDetailDTO), 200)]
        [HttpGet("detail/{groupId}")]
        public ObjectResult GetDetail(string userId, string groupId)
        {
            try
            {
                if (userId != null && groupId != null)
                {
                    Group group = _GroupDatabaseService.GetById(groupId);
                    List<Device> devices = _DeviceDatabaseService.GetByLocation(group.UserId, groupId);

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

        /// <summary>
        /// Get list of group from a type
        /// </summary>
        /// <param name="userId">user Id</param>  
        /// <param name="type">group type</param>  
        [ProducesResponseType(typeof(List<GroupSummaryDTO>), 200)]
        [HttpGet("{userId}/type/{type}")]
        public ObjectResult GetGroupsByType(string userId, string type) // Change string type to enum ? Lights etc ? 
        {
            try
            {
                if (userId != null)
                {
                    List<Group> groups = _GroupDatabaseService.GetByType(userId, type);

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

        /// <summary>
        /// Create a group
        /// </summary>
        /// <param name="groupCreateOrUpdateDetail">Group to create</param>  
        [ProducesResponseType(typeof(GroupDetailDTO), 200)]
        [HttpPost]
        public ObjectResult Create([FromBody] GroupCreateOrUpdateDetailDTO groupCreateOrUpdateDetail)
        {
            try
            {
                if (groupCreateOrUpdateDetail == null)
                    throw new KeyNotFoundException("Group is null");

                GroupDetailDTO groupCreated = GroupService.CreateOrUpdate(this._GroupDatabaseService, this._DeviceDatabaseService, groupCreateOrUpdateDetail.UserId, groupCreateOrUpdateDetail, true);

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

        /// <summary>
        /// Create groups from provider
        /// </summary>
        /// <param name="userId">User Id</param>  
        [ProducesResponseType(typeof(List<GroupDetailDTO>), 200)]
        [HttpPost("{userId}/fromZigbee")]
        public ObjectResult CreateDevicesFromZigbee2Mqtt(string userId)
        {
            try
            {
                if (userId == null)
                    throw new InvalidOperationException("User not found");

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

                Provider provider = _ProviderDatabaseService.GetByType("zigbee2mqtt");
                if (provider == null)
                    throw new KeyNotFoundException("Zigbee2mqtt provider not found");

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

                List<GroupDetailDTO> groupsDetail= GroupService.CreateFromZigbeeAsync(_GroupDatabaseService, _DeviceDatabaseService, userId, groups);

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

        /// <summary>
        /// Update a group
        /// </summary>
        /// <param name="groupCreateOrUpdateDetail">group to update</param>  
        [ProducesResponseType(typeof(GroupCreateOrUpdateDetailDTO), 200)]
        [HttpPut]
        public ObjectResult Update([FromBody] GroupCreateOrUpdateDetailDTO groupCreateOrUpdateDetail)
        {
            try
            {
                if (!_GroupDatabaseService.IsExist(groupCreateOrUpdateDetail.Id))
                    throw new KeyNotFoundException("Group does not exist");

                GroupDetailDTO groupUpdated = GroupService.CreateOrUpdate(this._GroupDatabaseService, this._DeviceDatabaseService, groupCreateOrUpdateDetail.UserId, groupCreateOrUpdateDetail, false);

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

        /// <summary>
        /// Delete device from a group
        /// </summary>
        /// <param name="deviceId">Id of device to delete from the group</param> 
        /// <param name="groupId">Id of group </param>  
        [HttpDelete("{groupId}/device/{deviceId}")]
        public ObjectResult Delete(string deviceId, string groupId)
        {
            try
            {
                if (groupId != null && deviceId != null)
                {
                    if (_GroupDatabaseService.IsExist(groupId))
                    {
                        // Update group
                        Group group = _GroupDatabaseService.GetById(groupId);
                        group.DevicesIds = group.DevicesIds.Where(d => d != deviceId).ToList();
                        group.UpdatedDate = DateTime.Now;
                        _GroupDatabaseService.Update(group);

                        // Update device
                        Device device = _DeviceDatabaseService.GetById(deviceId);
                        if (device != null)
                        {
                            device.GroupIds = device.GroupIds.Where(g => g != groupId).ToList();
                            device.UpdatedDate = DateTime.Now;
                            _DeviceDatabaseService.Update(device);
                        }
                    }
                }

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

        /// <summary>
        /// Delete a group
        /// </summary>
        /// <param name="groupId">Id of group to delete</param>  
        [HttpDelete("{groupId}")]
        public ObjectResult Delete(string groupId)
        {
            try
            {
                if (groupId != null)
                {
                    if (_GroupDatabaseService.IsExist(groupId))
                    {
                        Group group = _GroupDatabaseService.GetById(groupId);
                        // Delete group from all devices
                        List<Device> devices = _DeviceDatabaseService.GetByLocation(group.UserId, groupId);
                        foreach (var device in devices)
                        {
                            device.GroupIds = device.GroupIds.Where(g => g != groupId).ToList();
                            device.UpdatedDate = DateTime.Now;
                            _DeviceDatabaseService.Update(device);
                        }
                        // Delete group
                        _GroupDatabaseService.Remove(groupId);
                    }
                }

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

        /// <summary>
        /// Get all zigbee2Mqtt groups
        /// </summary>
        /// <param name="userId">User Id</param>  
        [ProducesResponseType(typeof(List<GroupDetailDTO>), 200)]
        [HttpGet("zigbee2Mqtt/{userId}")]
        public ObjectResult GetGroupsFromZigbee2Mqtt(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 GROUPS
                var groups = MqttClientService.groups; // Be carefull, we only got the exact result after each connection

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

        /// <summary>
        /// Delete all group 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))
                    {
                        _GroupDatabaseService.RemoveForUser(userId);
                    }
                }

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