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

namespace MyCore.Controllers
{
    //[Authorize(Roles = "Admin")]
    [Authorize]
    [Route("api/provider")]
    [ApiController]
    public class ProviderController : ControllerBase
    {
        private DeviceDatabaseService _DeviceDatabaseService;
        private ProviderDatabaseService _ProviderDatabaseService;
        private LocationDatabaseService _LocationDatabaseService;
        private UserDatabaseService _UserDatabaseService;

        public ProviderController(DeviceDatabaseService DeviceDatabaseService, ProviderDatabaseService ProviderDatabaseService, LocationDatabaseService LocationDatabaseService, UserDatabaseService UserDatabaseService)
        {
            this._DeviceDatabaseService = DeviceDatabaseService;
            this._ProviderDatabaseService = ProviderDatabaseService;
            this._LocationDatabaseService = LocationDatabaseService;
            this._UserDatabaseService = UserDatabaseService;
        }

        /// <summary>
        /// Get all user providers 
        /// </summary>
        /// <param name="userId">Id of user</param>  
        [ProducesResponseType(typeof(List<ProviderDTO>), 200)]
        [ProducesResponseType(typeof(string), 400)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpGet("{userId}")]
        public ObjectResult GetAll(string userId)
        {
            try
            {
                if (userId == null)
                    throw new ArgumentNullException("Incorrect parameters");

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

                List<Provider> providers = ProviderService.GetAll(this._ProviderDatabaseService, userId);

                List<ProviderDTO> providersDTO = providers.Select(p => p.ToDTO()).ToList();

                return new OkObjectResult(providersDTO);
            }
            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 provider
        /// </summary>
        /// <param name="providerDTO">Provider to create</param>  
        [ProducesResponseType(typeof(ProviderDTO), 200)]
        [ProducesResponseType(typeof(string), 400)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 409)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpPost]
        public ObjectResult Create([FromBody] ProviderDTO providerDTO)
        {
            try
            {

                if (providerDTO == null)
                    throw new ArgumentNullException("Incorrect parameters");

                if (providerDTO.UserId == null)
                    throw new ArgumentNullException("User not found");

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

                if (_ProviderDatabaseService.AlreadyExistForUser(providerDTO.UserId, providerDTO.Name))
                    throw new InvalidOperationException("Provider already exists");

                ProviderDTO providerCreated = ProviderService.CreateOrUpdate(this._ProviderDatabaseService, providerDTO.UserId, providerDTO, true);

                return new OkObjectResult(providerCreated);

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

        /// <summary>
        /// Update a provider
        /// </summary>
        /// <param name="providerDTO">Provider to update</param>  
        [ProducesResponseType(typeof(DeviceDetailDTO), 200)]
        [ProducesResponseType(typeof(string), 400)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpPut]
        public ObjectResult Update([FromBody] ProviderDTO providerDTO)
        {
            try
            {
                if (providerDTO == null)
                    throw new ArgumentNullException("Incorrect parameters");

                if (providerDTO.UserId == null)
                    throw new ArgumentNullException("User not found");

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

                if (!ProviderService.IsExist(this._ProviderDatabaseService, providerDTO.UserId, providerDTO.Id))
                        throw new KeyNotFoundException("Provider does not exist");

                ProviderDTO providerUpdated = ProviderService.CreateOrUpdate(this._ProviderDatabaseService, providerDTO.UserId, providerDTO, false);

                return new OkObjectResult(providerUpdated);
            }
            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 provider
        /// </summary>
        /// <param name="providerId">Id of provider to delete</param>  
        [ProducesResponseType(typeof(string), 202)]
        [ProducesResponseType(typeof(string), 400)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpDelete("{providerId}")]
        public ObjectResult Delete(string providerId)
        {
            try
            {
            // TODO DELETE ALL DEVICES linked
                if (providerId == null)
                    throw new ArgumentNullException("Incorrect parameters");

                if (!_ProviderDatabaseService.IsExist(providerId))
                    throw new KeyNotFoundException("Provider is null");

                _ProviderDatabaseService.Remove(providerId);

                return new ObjectResult("The provider has been 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 };
            }
        }
    }
}