package kr.re.etri.autoflow.controllers;

import io.swagger.v3.oas.annotations.tags.Tag;
import kr.re.etri.autoflow.service.PipelineUploadService;
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.client.HttpClientErrorException;
import org.springframework.web.multipart.MultipartFile;

import java.util.HashMap;
import java.util.Map;

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

    private final PipelineUploadService pipelineUploadService;

    @io.swagger.v3.oas.annotations.Operation(
            summary = "파이프라인 업로드",
            description = "Kubeflow에 파이프라인 파일(Multipart)을 업로드하고, 업로드 결과를 반환합니다."
    )
    @io.swagger.v3.oas.annotations.responses.ApiResponses({
            @io.swagger.v3.oas.annotations.responses.ApiResponse(
                    responseCode = "200",
                    description = "파이프라인 업로드 성공"
            ),
            @io.swagger.v3.oas.annotations.responses.ApiResponse(
                    responseCode = "400",
                    description = "잘못된 요청"
            ),
            @io.swagger.v3.oas.annotations.responses.ApiResponse(
                    responseCode = "500",
                    description = "서버 내부 오류"
            )
    })
    @PostMapping(value = "/upload", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
    public ResponseEntity<Map<String, Object>> uploadPipeline(
            @io.swagger.v3.oas.annotations.Parameter(description = "업로드할 파이프라인 파일", required = true)
            @RequestParam("uploadfile") MultipartFile file,

            @io.swagger.v3.oas.annotations.Parameter(description = "파이프라인 이름", required = true)
            @RequestParam(value = "name", required = false) String name,

            @io.swagger.v3.oas.annotations.Parameter(description = "표시 이름", required = true)
            @RequestParam(value = "display_name", required = false) String displayName,

            @io.swagger.v3.oas.annotations.Parameter(description = "파이프라인 설명", required = false)
            @RequestParam(value = "description", required = false) String description,

            @io.swagger.v3.oas.annotations.Parameter(description = "Kubeflow 네임스페이스", required = false)
            @RequestParam(value = "namespace", required = false) String namespace
    ) {
        try {
            Map<String, Object> result = pipelineUploadService.uploadPipeline(file, name, displayName, description, namespace);
            return ResponseEntity.ok(result);

        } catch (HttpClientErrorException e) {
            log.error("Kubeflow API Error: status={}, response={}", e.getStatusCode(), e.getResponseBodyAsString(), e);

            Map<String, Object> error = new HashMap<>();
            error.put("status", e.getStatusCode().value());
            error.put("error", e.getStatusText());
            error.put("message", e.getResponseBodyAsString());
            return ResponseEntity.status(e.getStatusCode()).body(error);

        } catch (Exception e) {
            log.error("Pipeline upload failed", e);

            Map<String, Object> error = new HashMap<>();
            error.put("status", 500);
            error.put("error", "Internal Server Error");
            error.put("message", e.getMessage());
            return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(error);
        }
    }
}