package kr.re.etri.autoflow.controllers;

import kr.re.etri.autoflow.entity.MinioAttachmentEntity;
import kr.re.etri.autoflow.payload.request.ProjectBaseSearchRequest;
import kr.re.etri.autoflow.service.DynamicMinioAttachmentService;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.data.domain.Page;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Slf4j
@RestController
@RequestMapping("/api/minio")
@RequiredArgsConstructor
public class DynamicMinioAttachmentController {

    private final DynamicMinioAttachmentService minioService;

    /**
     * 파일 업로드
     */
    @PostMapping("/upload")
    public ResponseEntity<Map<String, Object>> uploadFile(
            @RequestParam MultipartFile file,
            @RequestParam(required = false) String path,
            @RequestParam Long refId,
            @RequestParam(defaultValue = "DATASET") String refType,
            @RequestParam(required = false) String title,
            @RequestParam(required = false) String description,
            @RequestParam(defaultValue = "1") Integer version,
            @RequestParam String regUserId,
            @RequestParam Long projectId,
            @RequestParam(defaultValue = "type1") String type
    ) {
        try {
            MinioAttachmentEntity attachment = minioService.uploadFile(
                    file, path, refId, refType, title, description, version, regUserId, projectId, type
            );

            Map<String, Object> response = new HashMap<>();
            response.put("attachment", attachment);

            return ResponseEntity.ok(response);
        } catch (Exception e) {
            log.error("파일 업로드 실패", e);
            return ResponseEntity.internalServerError()
                    .body(Map.of("error", e.getMessage()));
        }
    }

    /**
     * 파일 다운로드
     */
    @GetMapping("/download")
    public ResponseEntity<byte[]> downloadFile(
            @RequestParam(defaultValue = "4/9d08fa7973cf4c39a0979bb4d70c640b/artifacts/sklearn-model/model.pkl") String objectName,
            @RequestParam(defaultValue = "type1") String type
    ) {
        try {
            byte[] bytes = minioService.downloadFile(objectName, type);

            String encodedFileName = URLEncoder.encode(objectName, StandardCharsets.UTF_8)
                    .replaceAll("\\+", "%20");

            return ResponseEntity.ok()
                    .header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename*=UTF-8''" + encodedFileName)
                    .contentType(MediaType.APPLICATION_OCTET_STREAM)
                    .body(bytes);
        } catch (Exception e) {
            log.error("파일 다운로드 실패", e);
            return ResponseEntity.internalServerError().build();
        }
    }

    /**
     * YAML 텍스트 읽기
     */
    @GetMapping(value = "/readYamlText", produces = MediaType.TEXT_PLAIN_VALUE)
    public ResponseEntity<String> readYamlText(
            @RequestParam String objectName,
            @RequestParam(defaultValue = "type1") String type
    ) {
        try {
            String content = minioService.readYamlText(objectName, type);
            return ResponseEntity.ok(content);
        } catch (Exception e) {
            log.error("MinIO YAML 읽기 실패: {}", objectName, e);
            return ResponseEntity.internalServerError()
                    .body("Error reading file: " + e.getMessage());
        }
    }

    /**
     * 파일 삭제
     */
    @DeleteMapping("/delete")
    public ResponseEntity<Map<String, Object>> deleteFile(
            @RequestParam Long id,
            @RequestParam(defaultValue = "type1") String type
    ) {
        boolean result = minioService.deleteFile(id, type);
        return ResponseEntity.ok(Map.of("deleted", result));
    }

    /**
     * 전체 조회
     */
    @GetMapping("/list")
    public ResponseEntity<List<MinioAttachmentEntity>> listAll() {
        List<MinioAttachmentEntity> list = minioService.findAll();
        return ResponseEntity.ok(list);
    }

    /**
     * 검색 + 페이지네이션
     */
    @PostMapping("/search")
    public ResponseEntity<Page<MinioAttachmentEntity>> search(
            @RequestBody ProjectBaseSearchRequest request,
            @RequestParam String refType,
            @RequestParam Integer refId
    ) {
        Page<MinioAttachmentEntity> page = minioService.search(request, refType, refId);
        return ResponseEntity.ok(page);
    }
}