package kr.re.etri.autoflow.controllers;

import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.Parameter;
import io.swagger.v3.oas.annotations.tags.Tag;
import kr.re.etri.autoflow.entity.KubeflowRunEntity;
import kr.re.etri.autoflow.payload.request.KubeflowRunSearchRequest;
import kr.re.etri.autoflow.repository.KubeflowRunRepository;
import kr.re.etri.autoflow.service.KubeflowRunService;
import kr.re.etri.autoflow.service.PipelineUploadService;
import lombok.RequiredArgsConstructor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springdoc.core.annotations.ParameterObject;
import org.springframework.data.domain.Page;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@Tag(name = "Kubeflow Run", description = "Kubeflow Run 조회 API")
@RestController
@RequestMapping("/api/kubeflow/runs")
@RequiredArgsConstructor
public class KubeflowRunsController {

    private static final Logger log = LoggerFactory.getLogger(KubeflowRunsController.class);
    private final KubeflowRunRepository runRepository;

    private final KubeflowRunService kubeflowRunService;
    private final PipelineUploadService pipelineUploadService;

    @Operation(summary = "모든 Kubeflow Run 조회")
    @GetMapping
    public ResponseEntity<List<KubeflowRunEntity>> getAllRuns() {
        List<KubeflowRunEntity> runs = runRepository.findAll();
        return ResponseEntity.ok(runs);
    }

    @Operation(summary = "Kubeflow Run 단건 조회")
    @GetMapping("/{runId}")
    public ResponseEntity<KubeflowRunEntity> getRun(
            @Parameter(description = "Kubeflow Run ID", example = "ad980d7f-050a-4c59-a775-94394befad40")
            @PathVariable("runId") String runId) {

        return runRepository.findByRunId(runId)
                .map(ResponseEntity::ok)
                .orElse(ResponseEntity.notFound().build());
    }

    @Operation(summary = "Kubeflow Run 검색 및 페이지네이션 조회")
    @GetMapping("/search")
    public ResponseEntity<Page<KubeflowRunEntity>> searchRuns(
            @ParameterObject @ModelAttribute KubeflowRunSearchRequest request) {

        log.info("[KubeflowRuns] GET /api/kubeflow/runs/search 호출됨 (Run 목록 조회)");
        Page<KubeflowRunEntity> page = kubeflowRunService.search(request);
        int total = page.getNumberOfElements();
        String firstRunId = page.getContent().isEmpty() ? null : page.getContent().get(0).getRunId();
        log.info("[KubeflowRuns] search 응답: content 개수={}, totalElements={}, 첫 run runId={}",
                total, page.getTotalElements(), firstRunId != null ? firstRunId : "(없음)");
        return ResponseEntity.ok(page);
    }

    @Operation(summary = "Kubeflow Run 삭제 (KFP에서 삭제 성공 시에만 DB에서 제거)")
    @DeleteMapping("/{runId}")
    public ResponseEntity<?> deleteRun(
            @Parameter(description = "Kubeflow Run ID", example = "ad980d7f-050a-4c59-a775-94394befad40")
            @PathVariable("runId") String runId) {

        return runRepository.findByRunId(runId)
                .map((entity) -> {
                    try {
                        pipelineUploadService.deleteKfpRun(runId, entity.getExperimentId());
                    } catch (Exception e) {
                        log.warn("[KubeflowRuns] KFP Run 삭제 실패, DB는 유지: runId={}, error={}", runId, e.getMessage());
                        return ResponseEntity.status(HttpStatus.BAD_GATEWAY)
                                .body("KFP Run 삭제 실패. 목록에서 제거되지 않습니다: " + e.getMessage());
                    }
                    runRepository.delete(entity);
                    return ResponseEntity.<Void>noContent().build();
                })
                .orElse(ResponseEntity.notFound().build());
    }
}