using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Swashbuckle.AspNetCore.Annotations;
using SPMS.Application.DTOs.File;
using SPMS.Application.Interfaces;
using SPMS.Domain.Common;
using SPMS.Domain.Exceptions;

namespace SPMS.API.Controllers;

[ApiController]
[Route("v1/in/file")]
[Authorize]
[ApiExplorerSettings(GroupName = "file")]
public class FileController : ControllerBase
{
    private readonly IFileService _fileService;

    public FileController(IFileService fileService)
    {
        _fileService = fileService;
    }

    [HttpPost("upload")]
    [SwaggerOperation(Summary = "파일 업로드", Description = "이미지 또는 CSV 파일을 업로드합니다.")]
    [RequestSizeLimit(52_428_800)] // 50MB
    public async Task<IActionResult> UploadAsync(IFormFile file, [FromForm] string file_type)
    {
        var serviceId = GetServiceId();
        var adminId = GetAdminId();

        using var stream = file.OpenReadStream();
        var result = await _fileService.UploadAsync(
            serviceId, adminId, stream, file.FileName, file.Length, file_type);

        return Ok(ApiResponse<FileUploadResponseDto>.Success(result));
    }

    [HttpPost("info")]
    [SwaggerOperation(Summary = "파일 조회", Description = "파일 메타데이터를 조회합니다.")]
    public async Task<IActionResult> GetInfoAsync([FromBody] FileInfoRequestDto request)
    {
        var serviceId = GetServiceId();
        var result = await _fileService.GetInfoAsync(serviceId, request.FileId);
        return Ok(ApiResponse<FileInfoResponseDto>.Success(result));
    }

    [HttpPost("list")]
    [SwaggerOperation(Summary = "파일 목록 조회", Description = "서비스의 파일 목록을 페이징 조회합니다.")]
    public async Task<IActionResult> GetListAsync([FromBody] FileListRequestDto request)
    {
        var serviceId = GetServiceId();
        var result = await _fileService.GetListAsync(serviceId, request);
        return Ok(ApiResponse<FileListResponseDto>.Success(result));
    }

    [HttpPost("delete")]
    [SwaggerOperation(Summary = "파일 삭제", Description = "파일을 삭제합니다. (Soft Delete)")]
    public async Task<IActionResult> DeleteAsync([FromBody] FileDeleteRequestDto request)
    {
        var serviceId = GetServiceId();
        await _fileService.DeleteAsync(serviceId, request.FileId);
        return Ok(ApiResponse.Success());
    }

    private long GetServiceId()
    {
        if (HttpContext.Items.TryGetValue("ServiceId", out var serviceIdObj) && serviceIdObj is long serviceId)
            return serviceId;

        throw new SpmsException(ErrorCodes.BadRequest, "서비스 식별 정보가 없습니다.", 400);
    }

    private long GetAdminId()
    {
        var adminIdClaim = User.FindFirst("adminId")?.Value;
        if (string.IsNullOrEmpty(adminIdClaim) || !long.TryParse(adminIdClaim, out var adminId))
            throw new SpmsException(ErrorCodes.Unauthorized, "인증 정보가 올바르지 않습니다.", 401);

        return adminId;
    }
}