using AutoMapper;
using Microsoft.AspNetCore.Mvc;
using Microsoft.SelfService.Portal.Core.API.Dto.Target.Add;
using Microsoft.SelfService.Portal.Core.API.Dto.Target.Edit;
using Microsoft.SelfService.Portal.Core.API.Dto.Target.Get;
using Microsoft.SelfService.Portal.Core.API.Interfaces;
using Microsoft.SelfService.Portal.Core.API.Models;

namespace Microsoft.SelfService.Portal.Core.API.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class TargetController : Controller
    {
        private readonly ITargetInterface _targetInterface;
        private readonly IDomainInterface _domainInterface;
        private readonly IMapper _mapper;

        public TargetController(ITargetInterface targetInterface, IDomainInterface domainInterface, IMapper mapper)
        {
            _targetInterface = targetInterface;
            _domainInterface = domainInterface;
            _mapper = mapper;
        }

        [HttpGet]
        [ProducesResponseType(200, Type = typeof(IEnumerable<TargetModel>))]
        public IActionResult GetTargets()
        {
            var targets = _mapper.Map<List<GetTargetDto>>(_targetInterface.GetTargets());

            if (!ModelState.IsValid)
                return BadRequest(ModelState);

            return Ok(targets);
        }

        [HttpGet("{Id}")]
        [ProducesResponseType(200, Type = typeof(TargetModel))]
        [ProducesResponseType(400)]
        public IActionResult GetTargetById(Guid Id)
        {
            if (!_targetInterface.CheckTargetById(Id))
                return NotFound();

            var target = _mapper.Map<GetTargetDetailsDto>(_targetInterface.GetTargetById(Id));

            if (!ModelState.IsValid)
                return BadRequest(ModelState);

            return Ok(target);
        }

        [HttpPost]
        [ProducesResponseType(200)]
        [ProducesResponseType(400)]
        public IActionResult AddTargetById([FromBody] AddTargetDto target)
        {
            if (target == null)
                return BadRequest(ModelState);

            if (_targetInterface.CheckTargetByName(target.Name))
            {
                ModelState.AddModelError("", "Target already exists");
                return StatusCode(422, ModelState);
            }

            if (target.DomainID.HasValue && !_domainInterface.CheckDomainById(target.DomainID.Value))
            {
                ModelState.AddModelError("", "Domain does not exist");
                return BadRequest(ModelState);
            }

            if (!ModelState.IsValid)
                return BadRequest(ModelState);

            var targetMap = _mapper.Map<TargetModel>(target);

            if (!_targetInterface.AddTargetById(targetMap))
            {
                ModelState.AddModelError("", "Something went wrong while saving");
                return StatusCode(500, ModelState);
            }

            return Ok(targetMap.Id);
        }

        [HttpPut("{Id}")]
        [ProducesResponseType(204)]
        [ProducesResponseType(400)]
        [ProducesResponseType(404)]
        public IActionResult EditTargetById(Guid Id, [FromBody] EditTargetDto target)
        {
            if (target == null)
                return BadRequest(ModelState);

            if (!_targetInterface.CheckTargetById(Id))
                return NotFound();

            if (!ModelState.IsValid)
                return BadRequest(ModelState);

            var existingTarget = _targetInterface.GetTargetById(Id);
            if (existingTarget == null)
                return NotFound();

            existingTarget.Name = target.Name;
            existingTarget.TargetType = target.TargetType;
            existingTarget.ProviderType = target.ProviderType;
            existingTarget.ExternalId = target.ExternalId;
            existingTarget.MetadataJson = target.MetadataJson;

            if (!_targetInterface.EditTargetById(existingTarget))
            {
                ModelState.AddModelError("", "Something went wrong");
                return StatusCode(500, ModelState);
            }

            return NoContent();
        }

        [HttpPost("{Id}/Domain/{domainId}")]
        [ProducesResponseType(204)]
        [ProducesResponseType(400)]
        [ProducesResponseType(404)]
        [ProducesResponseType(409)]
        public IActionResult LinkTargetToDomain(Guid Id, Guid domainId)
        {
            if (!_targetInterface.CheckTargetById(Id))
                return NotFound();

            if (!_domainInterface.CheckDomainById(domainId))
                return NotFound();

            var existingTarget = _targetInterface.GetTargetById(Id);
            if (existingTarget == null)
                return NotFound();

            if (existingTarget.DomainID.HasValue)
                return Conflict("Target is already linked to a domain. Unlink it first.");

            existingTarget.DomainID = domainId;

            if (!_targetInterface.EditTargetById(existingTarget))
            {
                ModelState.AddModelError("", "Something went wrong");
                return StatusCode(500, ModelState);
            }

            return NoContent();
        }

        [HttpDelete("{Id}/Domain")]
        [ProducesResponseType(204)]
        [ProducesResponseType(404)]
        public IActionResult UnlinkTargetFromDomain(Guid Id)
        {
            if (!_targetInterface.CheckTargetById(Id))
                return NotFound();

            var existingTarget = _targetInterface.GetTargetById(Id);
            if (existingTarget == null)
                return NotFound();

            if (!existingTarget.DomainID.HasValue)
                return NoContent();

            existingTarget.DomainID = null;

            if (!_targetInterface.EditTargetById(existingTarget))
            {
                ModelState.AddModelError("", "Something went wrong");
                return StatusCode(500, ModelState);
            }

            return NoContent();
        }

        [HttpDelete("{Id}")]
        [ProducesResponseType(204)]
        [ProducesResponseType(400)]
        [ProducesResponseType(404)]
        public IActionResult DeleteTargetById(Guid Id)
        {
            if (!_targetInterface.CheckTargetById(Id))
                return NotFound();

            if (!ModelState.IsValid)
                return BadRequest(ModelState);

            var target = _targetInterface.GetTargetById(Id);

            if (!_targetInterface.DeleteTargetById(target))
            {
                ModelState.AddModelError("", "Something went wrong while deleting");
                return StatusCode(500, ModelState);
            }

            return NoContent();
        }
    }
}