package com.label.controller;

import com.label.annotation.RequireRole;
import com.label.common.auth.TokenPrincipal;
import com.label.common.result.Result;
import com.label.entity.VideoProcessJob;
import com.label.service.VideoProcessService;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.tags.Tag;
import jakarta.servlet.http.HttpServletRequest;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.*;

import java.util.Map;

/**
 * 视频处理接口（4 个端点）。
 *
 * POST /api/video/process       — 触发视频处理（ADMIN）
 * GET  /api/video/jobs/{jobId}  — 查询任务状态（ADMIN）
 * POST /api/video/jobs/{jobId}/reset — 重置失败任务（ADMIN）
 * POST /api/video/callback      — AI 回调接口（无需认证，已在 AuthInterceptor 中排除）
 */
@Tag(name = "视频处理", description = "视频处理任务创建、查询、重置和回调")
@Slf4j
@RestController
@RequiredArgsConstructor
public class VideoController {

    private final VideoProcessService videoProcessService;

    @Value("${video.callback-secret:}")
    private String callbackSecret;

    /** POST /api/video/process — 触发视频处理任务 */
    @Operation(summary = "触发视频处理任务")
    @PostMapping("/api/video/process")
    @RequireRole("ADMIN")
    public Result<VideoProcessJob> createJob(@RequestBody Map<String, Object> body,
                                              HttpServletRequest request) {
        Object sourceIdVal = body.get("sourceId");
        Object jobTypeVal  = body.get("jobType");
        if (sourceIdVal == null || jobTypeVal == null) {
            return Result.failure("INVALID_PARAMS", "sourceId 和 jobType 不能为空");
        }
        Long sourceId = Long.parseLong(sourceIdVal.toString());
        String jobType = jobTypeVal.toString();
        String params  = body.containsKey("params") ? body.get("params").toString() : null;

        TokenPrincipal principal = principal(request);
        return Result.success(
                videoProcessService.createJob(sourceId, jobType, params, principal.getCompanyId()));
    }

    /** GET /api/video/jobs/{jobId} — 查询视频处理任务 */
    @Operation(summary = "查询视频处理任务状态")
    @GetMapping("/api/video/jobs/{jobId}")
    @RequireRole("ADMIN")
    public Result<VideoProcessJob> getJob(@PathVariable Long jobId,
                                           HttpServletRequest request) {
        return Result.success(videoProcessService.getJob(jobId, principal(request).getCompanyId()));
    }

    /** POST /api/video/jobs/{jobId}/reset — 管理员重置失败任务 */
    @Operation(summary = "重置失败的视频处理任务")
    @PostMapping("/api/video/jobs/{jobId}/reset")
    @RequireRole("ADMIN")
    public Result<VideoProcessJob> resetJob(@PathVariable Long jobId,
                                             HttpServletRequest request) {
        return Result.success(videoProcessService.reset(jobId, principal(request).getCompanyId()));
    }

    /**
     * POST /api/video/callback — AI 服务回调（无需 Bearer Token）。
     *
     * 此端点已在 AuthInterceptor 中排除认证，
     * 由 AI 服务直接调用，携带 jobId、status、outputPath 等参数。
     *
     * Body 示例：
     * { "jobId": 123, "status": "SUCCESS", "outputPath": "processed/123/frames.zip" }
     * { "jobId": 123, "status": "FAILED", "errorMessage": "ffmpeg error: ..." }
     */
    @Operation(summary = "接收 AI 服务视频处理回调")
    @PostMapping("/api/video/callback")
    public Result<Void> handleCallback(@RequestBody Map<String, Object> body,
                                         HttpServletRequest request) {
        // 共享密钥校验（配置了 VIDEO_CALLBACK_SECRET 时强制校验）
        if (callbackSecret != null && !callbackSecret.isBlank()) {
            String provided = request.getHeader("X-Callback-Secret");
            if (!callbackSecret.equals(provided)) {
                return Result.failure("UNAUTHORIZED", "回调密钥无效");
            }
        }

        Long jobId = Long.parseLong(body.get("jobId").toString());
        String status = (String) body.get("status");
        String outputPath  = body.containsKey("outputPath") ? (String) body.get("outputPath") : null;
        String errorMessage = body.containsKey("errorMessage") ? (String) body.get("errorMessage") : null;

        log.info("视频处理回调：jobId={}, status={}", jobId, status);
        videoProcessService.handleCallback(jobId, status, outputPath, errorMessage);
        return Result.success(null);
    }

    private TokenPrincipal principal(HttpServletRequest request) {
        return (TokenPrincipal) request.getAttribute("__token_principal__");
    }
}