using AutoMapper;
using CityInfo.API.Entities;
using CityInfo.API.Models;
using CityInfo.API.Services;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.JsonPatch;
using Microsoft.AspNetCore.Mvc;

namespace CityInfo.API.Controllers
{
    [Route("api/cities/{cityId}/pointsofinterest/", Name = "GetPointsOfInterest")]
    [Authorize(Policy = "MustBeFromCharleroi")]
    [ApiController]
    public class PointsOfInterestController : ControllerBase
    {
        private readonly ILogger<PointsOfInterestController> _logger;
        private readonly IMailService _mailService;
        private readonly ICityInfoRepository _cityInfoRepository;
        private readonly IMapper _mapper;

        public PointsOfInterestController(
            ILogger<PointsOfInterestController> logger,
            IMailService mailService,
            ICityInfoRepository cityInfoRepository,
            IMapper mapper)
        {
            _logger = logger ?? throw new ArgumentNullException(nameof(logger));
            _mailService = mailService ?? throw new ArgumentNullException(nameof(mailService));
            _cityInfoRepository = cityInfoRepository ?? throw new ArgumentNullException(nameof(cityInfoRepository));
            _mapper = mapper ?? throw new ArgumentNullException(nameof(mapper));
        }

        [HttpGet]
        public async Task<ActionResult<IEnumerable<PointOfInterestDto>>> GetPointsOfInterest(int cityId)
        {
            //throw new Exception("pipi");
            try
            {
                //throw new Exception("caca prout");
                var cityName = User.Claims.FirstOrDefault(claim => claim.Type == "city")?.Value;
                if (!await _cityInfoRepository.CityNameMatchesCityId(cityName, cityId))
                {
                    return Forbid();
                }

                if(!await _cityInfoRepository.CityExistAsync(cityId))
                {
                    _logger.LogInformation($"City with Id {cityId} wasn't found when accessing points of interest.");
                    return NotFound();
                }
                var pointsOfInterest = await _cityInfoRepository.GetPointsOfinterestForCityAsync(cityId);
                return Ok(_mapper.Map<IEnumerable<PointOfInterestDto>>(pointsOfInterest));
            }
            catch (Exception ex)
            {
                _logger.LogCritical($"Exception while getting points of interest for city with id {cityId}", ex);
                return StatusCode(500, "A problem happened while handling your request.");
            }
            
        }
        [HttpGet("{pointOfInterestId}", Name = "GetPointOfInterest")]
        public async Task<ActionResult<PointOfInterestDto>> GetPointOfInterest(int cityId, int pointOfInterestId)
        {
            if (!await _cityInfoRepository.CityExistAsync(cityId))
            {
                _logger.LogInformation($"City with Id {cityId} wasn't found when accessing point of interest.");
                return NotFound();
            }

            var pointOfInterest = await _cityInfoRepository.GetPointOfInterestForCityAsync(cityId, pointOfInterestId);
            
            if (pointOfInterest == null)
            {
                return NotFound();
            }
            return Ok(_mapper.Map<PointOfInterestDto>(pointOfInterest));
        }

        [HttpPost(Name = "CreatePointOfInterest")]
        public async Task<ActionResult<PointOfInterestDto>> CreatePointOfInterest(
            int cityId,
            PointOfInterestForCreationDto pointOfInterest)
        {
            if (!await _cityInfoRepository.CityExistAsync(cityId))
            {
                return NotFound();
            }

            var finalPointOfInterest = _mapper.Map<PointOfInterest>(pointOfInterest);
            await _cityInfoRepository.CreatePointOfInterestForCityAsync(cityId, finalPointOfInterest);

            await _cityInfoRepository.SaveChangesAsync();
            var createdPointOfInterestToReturn = _mapper.Map<PointOfInterestDto>(finalPointOfInterest);

            return CreatedAtRoute("GetPointOfInterest",
                new
                {
                    cityId = cityId,
                    pointOfInterestId = createdPointOfInterestToReturn.Id
                },
                createdPointOfInterestToReturn);
        }
        [HttpPut("{pointOfInterestId}", Name = "UpdatePointOfInterest")]
        public async Task<ActionResult> UpdatePointOfInterest(
            int cityId,
            int pointOfInterestId,
            PointOfInterestForUpdateDto pointOfInterest)
        {
            if (!await _cityInfoRepository.CityExistAsync(cityId))
            {
                return NotFound();
            }
            var pointofInterestEntity = await _cityInfoRepository.GetPointOfInterestForCityAsync(cityId, pointOfInterestId);

            if (pointofInterestEntity == null)
            {
                return NotFound();
            }
            _mapper.Map(pointOfInterest, pointofInterestEntity);
            await _cityInfoRepository.SaveChangesAsync();
            return NoContent();
        }

        [HttpPatch("{pointOfInterestId}", Name = "PartiallyUpdatePointOfInterest")]
        public async Task<ActionResult> PartiallyUpdatePointOfInterest(
            int cityId,
            int pointOfInterestId,
            JsonPatchDocument<PointOfInterestForUpdateDto> patchDocument)
        {
            if (!await _cityInfoRepository.CityExistAsync(cityId))
            {
                return NotFound();
            }

            var pointofInterestEntity = await _cityInfoRepository.GetPointOfInterestForCityAsync(cityId, pointOfInterestId);

            if (pointofInterestEntity == null)
            {
                return NotFound();
            }

            var pointOfInterestToPatch = _mapper.Map<PointOfInterestForUpdateDto>(pointofInterestEntity);

            patchDocument.ApplyTo(pointOfInterestToPatch, ModelState);
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }
            if (!TryValidateModel(pointOfInterestToPatch))
            {
                return BadRequest(ModelState);
            }
            _mapper.Map(pointOfInterestToPatch, pointofInterestEntity);
            await _cityInfoRepository.SaveChangesAsync();

            return NoContent();
        }
        [HttpDelete("{pointOfInterestId}")]
        public async Task<ActionResult> DeletePointOfInterest(
            int cityId,
            int pointOfInterestId)
        {
            if (!await _cityInfoRepository.CityExistAsync(cityId))
            {
                return NotFound();
            }

            var pointofInterestEntity = await _cityInfoRepository.GetPointOfInterestForCityAsync(cityId, pointOfInterestId);

            if (pointofInterestEntity == null)
            {
                return NotFound();
            }

            _cityInfoRepository.DeletePointOfInterest(pointofInterestEntity);
            await _cityInfoRepository.SaveChangesAsync();
            _mailService.Send("Point of interest deleted",
                $"Point of Interest {pointofInterestEntity.Name} with Id {pointofInterestEntity.Id} was deleted.");

            return NoContent();
        }
    }
}