package kr.re.etri.autoflow.controllers;

import io.minio.MinioClient;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.Parameter;
import io.swagger.v3.oas.annotations.media.Content;
import io.swagger.v3.oas.annotations.responses.ApiResponse;
import io.swagger.v3.oas.annotations.responses.ApiResponses;
import kr.re.etri.autoflow.entity.StorageAttachmentEntity;
import kr.re.etri.autoflow.entity.WorkflowEntity;
import kr.re.etri.autoflow.payload.request.CreateRunRequest;
import kr.re.etri.autoflow.service.StorageAttachmentService;
import kr.re.etri.autoflow.service.PipelineUploadService;
import kr.re.etri.autoflow.service.WorkFlowService;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.http.HttpStatus;
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.URLDecoder;
import java.nio.charset.StandardCharsets;
import java.util.HashMap;
import java.util.Map;

@Slf4j
@RestController
@RequestMapping("/pipelines")
@RequiredArgsConstructor
@CrossOrigin(origins = "*")
@io.swagger.v3.oas.annotations.tags.Tag(name = "Kubeflow Pipeline", description = "Kubeflow 파이프라인 API")
public class PipelineUploadController {

    private final PipelineUploadService pipelineUploadService;
    private final WorkFlowService workFlowService;

    private final StorageAttachmentService minioAttachmentService;

    @PostMapping(value = "/upload", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
    public ResponseEntity<Map<String, Object>> uploadPipeline(
            @RequestParam("uploadfile") MultipartFile file,
            @RequestParam("name") String name,
            @RequestParam("display_name") String displayName,
            @RequestParam(value = "description", required = false) String description,
            @RequestParam(value = "namespace", required = false) String namespace,
            @RequestParam("regUserId") String regUserId,
            @RequestParam("projectId") Long projectId
    ) {
        try {
            // description 한글 디코딩
            String decodedDescription = description != null
                    ? URLDecoder.decode(description, StandardCharsets.UTF_8)
                    : null;

            // 1. Kubeflow 업로드
            Map<String, Object> result = pipelineUploadService.uploadPipeline(
                    file, name, displayName, decodedDescription, namespace);

            WorkflowEntity workflow = WorkflowEntity.builder()
                    .pipelineId((String) result.get("pipeline_id"))
                    .displayName((String) result.get("display_name"))
                    .name((String) result.get("name"))
                    .description(decodedDescription) // 여기 디코딩 적용
                    .namespace((String) result.get("namespace"))
                    .regUserId(regUserId)
                    .projectId(projectId)
                    .kubeflowStatus("Created")
                    .version(1)
                    .build();

            workFlowService.save(workflow);

            // 2. MinIO 업로드
            StorageAttachmentEntity attachment = minioAttachmentService.uploadFile(
                    file,
                    "workflows/" + projectId,
                    workflow.getId(),
                    "workflows",
                    displayName,
                    decodedDescription, // 디코딩 적용
                    1,
                    regUserId,
                    projectId
            );

            String minioUrl = minioAttachmentService.getFileUrl(attachment.getStoragePath());

            // 3. 최종 응답
            Map<String, Object> response = new HashMap<>();
            response.put("pipeline", result);
            response.put("workflow", workflow);
            response.put("attachment", attachment);
            response.put("minioUrl", minioUrl);

            return ResponseEntity.ok(response);

        } catch (Exception e) {
            log.error("Pipeline + MinIO upload failed", e);
            return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR)
                    .body(Map.of(
                            "status", 500,
                            "error", "Internal Server Error",
                            "message", e.getMessage()
                    ));
        }
    }



    @PostMapping("/runs")
    @Operation(
            summary = "Kubeflow Run 생성",
            description = "Kubeflow에 Run을 생성합니다."
    )
    @ApiResponses({
            @ApiResponse(responseCode = "200", description = "Run 생성 성공"),
            @ApiResponse(responseCode = "400", description = "display_name 필수"),
            @ApiResponse(responseCode = "500", description = "서버 오류")
    })
    public ResponseEntity<Map<String, Object>> createRun(
            @RequestBody CreateRunRequest runRequest
    ) {
        try {
            Map<String, Object> result = pipelineUploadService.createRun(runRequest);
            return ResponseEntity.ok(result);

        } catch (IllegalArgumentException e) {
            log.error("Invalid run request", e);
            return ResponseEntity.status(HttpStatus.BAD_REQUEST)
                    .body(Map.of(
                            "status", 400,
                            "error", "Bad Request",
                            "message", e.getMessage()
                    ));

        } catch (Exception e) {
            log.error("Run creation failed", e);
            return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR)
                    .body(Map.of(
                            "status", 500,
                            "error", "Internal Server Error",
                            "message", e.getMessage()
                    ));
        }
    }
}