using GozareshgirProgramManager.Application._Common.Interfaces;
using GozareshgirProgramManager.Application._Common.Models;
using GozareshgirProgramManager.Application.Modules.TaskChat.DTOs;
using GozareshgirProgramManager.Application.Services.FileManagement;
using GozareshgirProgramManager.Domain._Common;
using GozareshgirProgramManager.Domain._Common.Exceptions;
using GozareshgirProgramManager.Domain.FileManagementAgg.Entities;
using GozareshgirProgramManager.Domain.FileManagementAgg.Enums;
using GozareshgirProgramManager.Domain.FileManagementAgg.Repositories;
using GozareshgirProgramManager.Domain.ProjectAgg.Entities;
using GozareshgirProgramManager.Domain.ProjectAgg.Enums;
using GozareshgirProgramManager.Domain.ProjectAgg.Repositories;
using Microsoft.AspNetCore.Http;

namespace GozareshgirProgramManager.Application.Modules.Projects.Commands.CreateBugSection;

public class CreateBugSectionCommandHandler : IBaseCommandHandler<CreateBugSectionCommand>
{
    readonly IUnitOfWork _unitOfWork;
    readonly IBugSectionRepository _bugSectionRepository;
    readonly IFileUploadService _fileUploadService;
    private readonly IAuthHelper _authHelper;

    public CreateBugSectionCommandHandler(IUnitOfWork unitOfWork, IBugSectionRepository bugSectionRepository,
      IAuthHelper authHelper, IFileUploadService fileUploadService)
    {
        _unitOfWork = unitOfWork;
        _bugSectionRepository = bugSectionRepository;

        _authHelper = authHelper;
        _fileUploadService = fileUploadService;
    }

    public async Task<OperationResult> Handle(CreateBugSectionCommand request, CancellationToken cancellationToken)
    {
        var currentUserId = _authHelper.GetCurrentUserId()
                            ?? throw new UnAuthorizedException("کاربر احراز هویت نشده است");

        #region Validation
        if (_bugSectionRepository.Exists(x => x.TaskId == request.TaskId))
            return OperationResult.Failure("برای این بخش قبلا تسک باگ ایجاد شده است");

        if (string.IsNullOrWhiteSpace(request.InitialDescription))
            return OperationResult.Failure("توضیحات باگ خالی است");

        if (request.OriginalAssignedUserId == 0)
            return OperationResult.Failure("کاربر انتخاب نشده است"); 
        #endregion

        var bug = new BugSection(request.TaskId, request.InitialDescription, request.OriginalAssignedUserId,
            request.Priority);
        await _bugSectionRepository.CreateAsync(bug);
     
        if (request.Files.Any())
        {
            foreach (var file in request.Files)
            {
                var uploadedFile = await _fileUploadService.UploadFileAsync
                (
                    file,
                    FileCategory.BugSection,
                    currentUserId
                );
                if (!uploadedFile.IsSuccess)
                {
                    return OperationResult.Failure(uploadedFile.ErrorMessage ?? "خطا در آپلود فایل");
                }
                bug.AddDocument(new BugDocument(uploadedFile.FileId!.Value));

            }
        }

        await _unitOfWork.SaveChangesAsync(cancellationToken);
        return OperationResult.Success(); 
    }


}

public record CreateBugSectionCommand(Guid TaskId, string InitialDescription, long OriginalAssignedUserId, ProjectTaskPriority Priority, List<IFormFile> Files) : IBaseCommand;