import { NextResponse } from "next/server";
import { createAdminSupabaseClient } from "@/lib/supabase/admin";
import { createServerSupabaseClient } from "@/lib/supabase/server";
import {
  RectificationCaseServiceError,
  mapRectificationRpcError,
  openRectificationCase,
} from "@/lib/rectification-agentic/v9/case-service";
import { parseOpenRectificationCaseRequest } from "@/lib/rectification-agentic/v9/open-request";

export const runtime = "nodejs";

function serviceErrorResponse(error: unknown) {
  if (error instanceof RectificationCaseServiceError) {
    const view = mapRectificationRpcError(
      new Error(`agentic_rectification_${error.code}`),
    );
    return NextResponse.json({ error: view.message, code: view.code }, { status: view.status });
  }
  return NextResponse.json(
    { error: "校正服务暂时不可用", code: "rectification_service_failed" },
    { status: 500 },
  );
}

/**
 * POST /api/rectification/cases/open
 *
 * Browser sends only { intent, requestId } (+ sessionId for intent=session).
 * The server derives the user from the session, normalizes the profile and
 * decides resume-or-create. Double-click / multi-tab are idempotent.
 */
export async function POST(request: Request) {
  let supabase;
  let accounting;
  try {
    supabase = await createServerSupabaseClient();
    accounting = createAdminSupabaseClient();
  } catch {
    return NextResponse.json({ error: "服务尚未配置" }, { status: 503 });
  }
  const {
    data: { user },
    error: authError,
  } = await supabase.auth.getUser();
  if (authError || !user) {
    return NextResponse.json({ error: "请先登录" }, { status: 401 });
  }

  const parsed = parseOpenRectificationCaseRequest(
    await request.json().catch(() => null),
  );
  if (!parsed) {
    return NextResponse.json(
      { error: "请求内容不正确", code: "invalid_open_request" },
      { status: 400 },
    );
  }

  try {
    const response = await openRectificationCase(accounting, user.id, parsed);
    return NextResponse.json(response);
  } catch (error) {
    return serviceErrorResponse(error);
  }
}