using Manager.DTOs;
using ManagerService.Data;
using ManagerService.Data.SubSection;
using ManagerService.DTOs;
using ManagerService.Helpers;
using ManagerService.Services;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Logging;
using NSwag.Annotations;
using System;
using System.Collections.Generic;
using System.Linq;

namespace ManagerService.Controllers
{
    [Authorize(Policy = ManagerService.Service.Security.Policies.ContentEditor)]
    [ApiController, Route("api/[controller]")]
    [OpenApiTag("Section parcours", Description = "Section parcours management")]
    public class SectionParcoursController : ControllerBase
    {
        private readonly MyInfoMateDbContext _myInfoMateDbContext;
        private readonly ILogger<SectionParcoursController> _logger;
        private readonly IConfiguration _configuration;
        IHexIdGeneratorService idService = new HexIdGeneratorService();

        public SectionParcoursController(IConfiguration configuration, ILogger<SectionParcoursController> logger, MyInfoMateDbContext myInfoMateDbContext)
        {
            _logger = logger;
            _configuration = configuration;
            _myInfoMateDbContext = myInfoMateDbContext;
        }

        /// <summary>
        /// Get all guided paths from a parcours section
        /// </summary>
        [AllowAnonymous]
        [ProducesResponseType(typeof(List<GuidedPathDTO>), 200)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpGet("{sectionParcoursId}/guided-path")]
        public ObjectResult GetAllGuidedPathFromSection(string sectionParcoursId)
        {
            try
            {
                List<GuidedPath> guidedPaths = _myInfoMateDbContext.GuidedPaths
                    .Include(gp => gp.ImageResource)
                    .Include(gp => gp.Steps).ThenInclude(s => s.QuizQuestions).ThenInclude(q => q.PuzzleImage)
                    .Where(gp => gp.SectionParcoursId == sectionParcoursId)
                    .OrderBy(gp => gp.Order)
                    .ToList();

                return new OkObjectResult(guidedPaths.Select(gp => gp.ToDTO()));
            }
            catch (KeyNotFoundException ex)
            {
                return new NotFoundObjectResult(ex.Message);
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }

        /// <summary>
        /// Create a new guided path in a parcours section
        /// </summary>
        [ProducesResponseType(typeof(GuidedPathDTO), 200)]
        [ProducesResponseType(typeof(string), 400)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpPost("{sectionParcoursId}/guided-path")]
        public ObjectResult CreateGuidedPath(string sectionParcoursId, [FromBody] GuidedPathDTO guidedPathDTO)
        {
            try
            {
                if (sectionParcoursId == null)
                    throw new ArgumentNullException("SectionParcoursId param is null");

                if (guidedPathDTO == null)
                    throw new ArgumentNullException("GuidedPath param is null");

                var sectionParcours = _myInfoMateDbContext.Sections.OfType<SectionParcours>().FirstOrDefault(sp => sp.Id == sectionParcoursId);
                if (sectionParcours == null)
                    throw new KeyNotFoundException("SectionParcours does not exist");

                GuidedPath guidedPath = new GuidedPath().FromDTO(guidedPathDTO);
                guidedPath.Id = idService.GenerateHexId();
                guidedPath.SectionParcoursId = sectionParcoursId;
                guidedPath.Order = _myInfoMateDbContext.GuidedPaths.Count(gp => gp.SectionParcoursId == sectionParcoursId);
                guidedPath.Steps = new List<GuidedStep>();

                foreach (var stepDTO in guidedPathDTO.steps ?? new List<GuidedStepDTO>())
                {
                    GuidedStep step = new GuidedStep().FromDTO(stepDTO);
                    step.Id = idService.GenerateHexId();
                    step.GuidedPathId = guidedPath.Id;
                    guidedPath.Steps.Add(step);
                }

                _myInfoMateDbContext.GuidedPaths.Add(guidedPath);
                _myInfoMateDbContext.SaveChanges();

                return new OkObjectResult(guidedPath.ToDTO());
            }
            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>
        /// Update a guided path
        /// </summary>
        [ProducesResponseType(typeof(GuidedPathDTO), 200)]
        [ProducesResponseType(typeof(string), 400)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpPut("guided-path")]
        public ObjectResult UpdateGuidedPath([FromBody] GuidedPathDTO guidedPathDTO)
        {
            try
            {
                if (guidedPathDTO == null)
                    throw new ArgumentNullException("GuidedPath param is null");

                var existingGuidedPath = _myInfoMateDbContext.GuidedPaths
                    .Include(gp => gp.Steps).ThenInclude(s => s.QuizQuestions)
                    .FirstOrDefault(gp => gp.Id == guidedPathDTO.id);
                if (existingGuidedPath == null)
                    throw new KeyNotFoundException("GuidedPath does not exist");

                existingGuidedPath.InstanceId = guidedPathDTO.instanceId;
                existingGuidedPath.Title = guidedPathDTO.title ?? new List<TranslationDTO>();
                existingGuidedPath.Description = guidedPathDTO.description ?? new List<TranslationDTO>();
                existingGuidedPath.IsLinear = guidedPathDTO.isLinear;
                existingGuidedPath.RequireSuccessToAdvance = guidedPathDTO.requireSuccessToAdvance;
                existingGuidedPath.HideNextStepsUntilComplete = guidedPathDTO.hideNextStepsUntilComplete;
                existingGuidedPath.EstimatedDurationMinutes = guidedPathDTO.estimatedDurationMinutes;
                existingGuidedPath.ImageResourceId = guidedPathDTO.imageResourceId;
                existingGuidedPath.Order = guidedPathDTO.order.GetValueOrDefault();
                existingGuidedPath.IsGameMode = guidedPathDTO.isGameMode;
                existingGuidedPath.GameMessageDebut = guidedPathDTO.gameMessageDebut ?? new List<TranslationAndResourceDTO>();
                existingGuidedPath.GameMessageFin = guidedPathDTO.gameMessageFin ?? new List<TranslationAndResourceDTO>();

                // Sync steps
                var dtoStepIds = (guidedPathDTO.steps ?? new List<GuidedStepDTO>())
                    .Where(s => s.id != null)
                    .Select(s => s.id)
                    .ToHashSet();

                var stepsToRemove = existingGuidedPath.Steps
                    .Where(s => !dtoStepIds.Contains(s.Id))
                    .ToList();
                foreach (var s in stepsToRemove)
                    existingGuidedPath.Steps.Remove(s);

                foreach (var stepDTO in guidedPathDTO.steps ?? new List<GuidedStepDTO>())
                {
                    var existing = existingGuidedPath.Steps.FirstOrDefault(s => s.Id == stepDTO.id);
                    if (existing != null)
                    {
                        existing.FromDTO(stepDTO);
                        existing.GuidedPathId = existingGuidedPath.Id;
                    }
                    else
                    {
                        var newStep = new GuidedStep().FromDTO(stepDTO);
                        newStep.Id = idService.GenerateHexId();
                        newStep.GuidedPathId = existingGuidedPath.Id;
                        existingGuidedPath.Steps.Add(newStep);
                    }
                }

                _myInfoMateDbContext.SaveChanges();

                return new OkObjectResult(existingGuidedPath.ToDTO());
            }
            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 guided path
        /// </summary>
        [ProducesResponseType(typeof(string), 202)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpDelete("guided-path/{guidedPathId}")]
        public ObjectResult DeleteGuidedPath(string guidedPathId)
        {
            try
            {
                var guidedPath = _myInfoMateDbContext.GuidedPaths.Include(gp => gp.Steps).FirstOrDefault(gp => gp.Id == guidedPathId);
                if (guidedPath == null)
                    throw new KeyNotFoundException("GuidedPath does not exist");

                _myInfoMateDbContext.RemoveRange(guidedPath.Steps);
                _myInfoMateDbContext.Remove(guidedPath);
                _myInfoMateDbContext.SaveChanges();

                return new ObjectResult("The guidedPath has been deleted") { StatusCode = 202 };
            }
            catch (KeyNotFoundException ex)
            {
                return new NotFoundObjectResult(ex.Message);
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }

        /// <summary>
        /// Get all steps from a guided path
        /// </summary>
        [AllowAnonymous]
        [ProducesResponseType(typeof(List<GuidedStepDTO>), 200)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpGet("guided-path/{guidedPathId}/guided-step")]
        public ObjectResult GetAllGuidedStepFromGuidedPath(string guidedPathId)
        {
            try
            {
                List<GuidedStep> guidedSteps = _myInfoMateDbContext.GuidedSteps
                    .Include(gs => gs.QuizQuestions)
                    .Where(gs => gs.GuidedPathId == guidedPathId)
                    .OrderBy(gs => gs.Order)
                    .ToList();

                return new OkObjectResult(guidedSteps.Select(gs => gs.ToDTO()));
            }
            catch (KeyNotFoundException ex)
            {
                return new NotFoundObjectResult(ex.Message);
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }

        /// <summary>
        /// Create a new step in a guided path
        /// </summary>
        [ProducesResponseType(typeof(GuidedStepDTO), 200)]
        [ProducesResponseType(typeof(string), 400)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpPost("guided-path/{guidedPathId}/guided-step")]
        public ObjectResult CreateGuidedStep(string guidedPathId, [FromBody] GuidedStepDTO guidedStepDTO)
        {
            try
            {
                if (guidedPathId == null)
                    throw new ArgumentNullException("GuidedPathId param is null");

                if (guidedStepDTO == null)
                    throw new ArgumentNullException("GuidedStep param is null");

                var guidedPath = _myInfoMateDbContext.GuidedPaths.FirstOrDefault(gp => gp.Id == guidedPathId);
                if (guidedPath == null)
                    throw new KeyNotFoundException("GuidedPath does not exist");

                GuidedStep guidedStep = new GuidedStep().FromDTO(guidedStepDTO);
                guidedStep.Id = idService.GenerateHexId();
                guidedStep.GuidedPathId = guidedPathId;
                guidedStep.Order = _myInfoMateDbContext.GuidedSteps.Count(gs => gs.GuidedPathId == guidedPathId);

                _myInfoMateDbContext.GuidedSteps.Add(guidedStep);
                _myInfoMateDbContext.SaveChanges();

                return new OkObjectResult(guidedStep.ToDTO());
            }
            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>
        /// Update a guided step
        /// </summary>
        [ProducesResponseType(typeof(GuidedStepDTO), 200)]
        [ProducesResponseType(typeof(string), 400)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpPut("guided-step")]
        public ObjectResult UpdateGuidedStep([FromBody] GuidedStepDTO guidedStepDTO)
        {
            try
            {
                if (guidedStepDTO == null)
                    throw new ArgumentNullException("GuidedStep param is null");

                var existingGuidedStep = _myInfoMateDbContext.GuidedSteps
                    .Include(gs => gs.QuizQuestions)
                    .FirstOrDefault(gs => gs.Id == guidedStepDTO.id);
                if (existingGuidedStep == null)
                    throw new KeyNotFoundException("GuidedStep does not exist");

                existingGuidedStep.FromDTO(guidedStepDTO);

                _myInfoMateDbContext.SaveChanges();

                return new OkObjectResult(existingGuidedStep.ToDTO());
            }
            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 guided step
        /// </summary>
        [ProducesResponseType(typeof(string), 202)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpDelete("guided-step/{guidedStepId}")]
        public ObjectResult DeleteGuidedStep(string guidedStepId)
        {
            try
            {
                var guidedStep = _myInfoMateDbContext.GuidedSteps.Include(gs => gs.QuizQuestions).FirstOrDefault(gs => gs.Id == guidedStepId);
                if (guidedStep == null)
                    throw new KeyNotFoundException("GuidedStep does not exist");

                guidedStep.QuizQuestions?.Clear();
                _myInfoMateDbContext.Remove(guidedStep);
                _myInfoMateDbContext.SaveChanges();

                return new ObjectResult("The guidedStep has been deleted") { StatusCode = 202 };
            }
            catch (KeyNotFoundException ex)
            {
                return new NotFoundObjectResult(ex.Message);
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }
    }
}