using ManagerService.Data;
using ManagerService.Data.SubSection;
using ManagerService.DTOs;
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;
using static ManagerService.Data.SubSection.SectionEvent;

namespace ManagerService.Controllers
{
    [Authorize] // TODO Add ROLES (Roles = "Admin")
    [ApiController, Route("api/[controller]")]
    [OpenApiTag("Section event", Description = "Section event management")]
    public class SectionEventController : ControllerBase
    {
        private readonly MyInfoMateDbContext _myInfoMateDbContext;

        private readonly ILogger<SectionEventController> _logger;
        private readonly IConfiguration _configuration;
        IHexIdGeneratorService idService = new HexIdGeneratorService();

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

        /// <summary>
        /// Get all programme block from section
        /// </summary>
        /// <param name="sectionEventId">Section id</param>
        [AllowAnonymous]
        [ProducesResponseType(typeof(List<ProgrammeBlock>), 200)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpGet("{sectionId}/programmes")]
        public ObjectResult GetAllProgrammeBlockFromSection(string sectionEventId)
        {
            try
            {
                SectionEvent sectionEvent = _myInfoMateDbContext.Sections.OfType<SectionEvent>().Include(se => se.Programme).ThenInclude(se => se.MapAnnotations).ThenInclude(se => se.IconResource).FirstOrDefault(se => se.Id == sectionEventId);

                if (sectionEvent == null)
                    throw new KeyNotFoundException("Section event does not exist");

                /*List<ProgrammeBlock> programmeBlocks = new List<ProgrammeBlock>();
                foreach (var program in sectionEvent.Programme)
                {
                    foreach (var mapAnnotation in program.MapAnnotations) {
                        var resource = _myInfoMateDbContext.Resources.FirstOrDefault(r => r.Id == mapAnnotation.IconResourceId);
                        if (resource != null)
                        {
                            mapAnnotation.IconResource = resource; // TO check.. use DTO instead ? 
                        }
                    }
                }*/

                return new OkObjectResult(sectionEvent.Programme);
            }
            catch (KeyNotFoundException ex)
            {
                return new NotFoundObjectResult(ex.Message) { };
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }

        /// <summary>
        /// Create new programme block
        /// </summary>
        /// <param name="sectionEventId">Section event Id</param>  
        /// <param name="programmeBlockDTO">Programme block</param>  
        [ProducesResponseType(typeof(ProgrammeBlockDTO), 200)]
        [ProducesResponseType(typeof(string), 400)]
        [ProducesResponseType(typeof(string), 409)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpPost("{sectionEventId}/programmes")]
        public ObjectResult CreateProgrammeBlock(string sectionEventId, [FromBody] ProgrammeBlockDTO programmeBlockDTO)
        {
            try
            {
                if (sectionEventId == null)
                    throw new ArgumentNullException("Section param is null");

                if (programmeBlockDTO == null)
                    throw new ArgumentNullException("ProgrammeBlock param is null");

                var existingSection = _myInfoMateDbContext.Sections.OfType<SectionEvent>().Include(se => se.Programme).FirstOrDefault(se => se.Id == sectionEventId);
                if (existingSection == null)
                    throw new KeyNotFoundException("Section event does not exist");

                ProgrammeBlock programmeBlock = new ProgrammeBlock().FromDTO(programmeBlockDTO);
                programmeBlock.Id = idService.GenerateHexId();
                existingSection.Programme.Add(programmeBlock);

                _myInfoMateDbContext.SaveChanges();

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

        /// <summary>
        /// Update a program block
        /// </summary>
        /// <param name="programmeBlock">ProgramBlock to update</param>  
        [ProducesResponseType(typeof(ProgrammeBlockDTO), 200)]
        [ProducesResponseType(typeof(string), 400)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpPut("programmes")]
        public ObjectResult UpdateProgrammeBlock([FromBody] ProgrammeBlockDTO programmeBlockDTO)
        {
            try
            {
                if (programmeBlockDTO == null)
                    throw new ArgumentNullException("ProgrammeBlock param is null");

                var existingProgramBlock = _myInfoMateDbContext.ProgrammeBlocks.FirstOrDefault(pb => pb.Id == programmeBlockDTO.Id);
                if (existingProgramBlock == null)
                    throw new KeyNotFoundException("ProgrammeBlock does not exist");

                existingProgramBlock.Title = programmeBlockDTO.Title;
                existingProgramBlock.Description = programmeBlockDTO.Description;
                existingProgramBlock.StartTime = programmeBlockDTO.StartTime;
                existingProgramBlock.EndTime = programmeBlockDTO.EndTime;

                _myInfoMateDbContext.SaveChanges();

                return new OkObjectResult(existingProgramBlock);
            }
            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 programBlock
        /// </summary>
        /// <param name="programBlockId">Id of program block to delete</param>  
        [ProducesResponseType(typeof(string), 202)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpDelete("programmes/{programBlockId}")]
        public ObjectResult DeleteProgrammeBlock(string programBlockId)
        {
            try
            {
                var programBlock = _myInfoMateDbContext.ProgrammeBlocks.Include(pb => pb.MapAnnotations).FirstOrDefault(pb => pb.Id == programBlockId);
                if (programBlock == null)
                    throw new KeyNotFoundException("ProgramBlock does not exist");

                foreach (var mapAnnotation in programBlock.MapAnnotations) // Is it really needed? 
                {
                    _myInfoMateDbContext.Remove(mapAnnotation);
                }

                _myInfoMateDbContext.Remove(programBlock);
                _myInfoMateDbContext.SaveChanges();

                return new ObjectResult("The programBlock 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 };
            }
        }

        /// <summary>
        /// Get all map annotation from program block
        /// </summary>
        /// <param name="programBlockId">Program block id</param>
        [AllowAnonymous]
        [ProducesResponseType(typeof(List<MapAnnotationDTO>), 200)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpGet("{programBlockId}/map-annotations")]
        public ObjectResult GetAllMapAnnotationsFromProgrammeBlock(string programBlockId)
        {
            try
            {
                ProgrammeBlock programmeBlock = _myInfoMateDbContext.ProgrammeBlocks.Include(pb => pb.MapAnnotations).ThenInclude(pb => pb.IconResource).FirstOrDefault(pb => pb.Id == programBlockId);

                if (programmeBlock == null)
                    throw new KeyNotFoundException("ProgrammeBlock does not exist");

                /*List<ProgrammeBlock> programmeBlocks = new List<ProgrammeBlock>();
                foreach (var program in sectionEvent.Programme)
                {
                    foreach (var mapAnnotation in program.MapAnnotations) {
                        var resource = _myInfoMateDbContext.Resources.FirstOrDefault(r => r.Id == mapAnnotation.IconResourceId);
                        if (resource != null)
                        {
                            mapAnnotation.IconResource = resource; // TO check.. use DTO instead ? 
                        }
                    }
                }*/

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

        /// <summary>
        /// Create new map annotation
        /// </summary>
        /// <param name="programmeBlockId">Programme block id</param>  
        /// <param name="mapAnnotation">Map annotation</param>  
        [ProducesResponseType(typeof(MapAnnotationDTO), 200)]
        [ProducesResponseType(typeof(string), 400)]
        [ProducesResponseType(typeof(string), 409)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpPost("{programmeBlockId}/map-annotations")]
        public ObjectResult CreateMapAnnotation(string programmeBlockId, [FromBody] MapAnnotationDTO mapAnnotationDTO)
        {
            try
            {
                if (programmeBlockId == null)
                    throw new ArgumentNullException("ProgrammeBlockId param is null");

                if (mapAnnotationDTO == null)
                    throw new ArgumentNullException("MapAnnotation param is null");

                var existingProgrammeBloc = _myInfoMateDbContext.ProgrammeBlocks.Include(pb => pb.MapAnnotations).FirstOrDefault(pb => pb.Id == programmeBlockId);
                if (existingProgrammeBloc == null)
                    throw new KeyNotFoundException("ProgrammeBlock does not exist");

                // TODO verification ? 
                MapAnnotation mapAnnotation = new MapAnnotation().FromDTO(mapAnnotationDTO);
                mapAnnotation.Id = idService.GenerateHexId();
                existingProgrammeBloc.MapAnnotations.Add(mapAnnotation);

                _myInfoMateDbContext.SaveChanges();

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

        /// <summary>
        /// Update a map annotation
        /// </summary>
        /// <param name="mapAnnotation">mapAnnotation to update</param>  
        [ProducesResponseType(typeof(MapAnnotationDTO), 200)]
        [ProducesResponseType(typeof(string), 400)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpPut("map-annotations")]
        public ObjectResult UpdateMapAnnotation([FromBody] MapAnnotationDTO mapAnnotationDTO)
        {
            try
            {
                if (mapAnnotationDTO == null)
                    throw new ArgumentNullException("MapAnnotation param is null");

                var existingMapAnnotation = _myInfoMateDbContext.MapAnnotations.Include(ma => ma.IconResource).FirstOrDefault(ma => ma.Id == mapAnnotationDTO.Id);
                if (existingMapAnnotation == null)
                    throw new KeyNotFoundException("MapAnnotation does not exist");

                existingMapAnnotation.Type = mapAnnotationDTO.Type;
                existingMapAnnotation.Label = mapAnnotationDTO.Label;
                existingMapAnnotation.GeometryType = mapAnnotationDTO.GeometryType;
                existingMapAnnotation.Geometry = mapAnnotationDTO.Geometry;
                existingMapAnnotation.PolyColor = mapAnnotationDTO.PolyColor;
                existingMapAnnotation.Icon = mapAnnotationDTO.Icon;
                existingMapAnnotation.IconResourceId = mapAnnotationDTO.IconResourceId;

                _myInfoMateDbContext.SaveChanges();

                return new OkObjectResult(existingMapAnnotation);
            }
            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 mapAnnotation
        /// </summary>
        /// <param name="mapAnnotationId">Id of map annotation to delete</param>  
        [ProducesResponseType(typeof(string), 202)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpDelete("map-annotations/{mapAnnotationId}")]
        public ObjectResult DeleteMapAnnotation(string mapAnnotationId)
        {
            try
            {
                var mapAnnotation = _myInfoMateDbContext.MapAnnotations.FirstOrDefault(ma => ma.Id == mapAnnotationId);
                if (mapAnnotation == null)
                    throw new KeyNotFoundException("MapAnnotation does not exist");

                _myInfoMateDbContext.Remove(mapAnnotation);
                _myInfoMateDbContext.SaveChanges();

                return new ObjectResult("The mapAnnotation 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 };
            }
        }
    }
}