import { NextRequest, NextResponse } from "next/server";
import { auth } from "@/app/(auth)/auth";
import {
  executeResizeJob,
  ResizeServiceError,
} from "@/lib/ai/resize/service";

export async function POST(request: NextRequest) {
  try {
    const session = await auth();
    if (!session?.user?.id) {
      return NextResponse.json({ error: "未授权，请先登录" }, { status: 401 });
    }

    const contentType = request.headers.get("content-type") || "";
    if (!contentType.includes("application/json")) {
      return NextResponse.json(
        { error: "不支持的Content-Type，请使用application/json" },
        { status: 400 },
      );
    }

    const body = await request.json();
    const imageBase64 = String(body.image_base64 || "").trim();
    const canvasWidth = Number(body.canvasWidth);
    const canvasHeight = Number(body.canvasHeight);

    if (!imageBase64) {
      return NextResponse.json({ error: "缺少image_base64参数" }, { status: 400 });
    }

    const result = await executeResizeJob({
      userId: session.user.id,
      imageBuffer: Buffer.from(imageBase64, "base64"),
      prompt: body.prompt || "尺寸调整处理",
      chatId: body.chatId || null,
      messageId: body.messageId || null,
      canvasWidth,
      canvasHeight,
      mimeType: body.mimeType || "image/png",
      transparentBackground: body.transparentBackground === true,
      backgroundColor: body.backgroundColor || undefined,
    });

    return NextResponse.json({
      success: true,
      ...result,
    });
  } catch (error) {
    if (error instanceof ResizeServiceError) {
      return NextResponse.json(
        {
          error: error.message,
          detail: error.detail || error.message,
        },
        { status: error.status },
      );
    }

    console.error("[Resize API] 处理错误:", error);
    return NextResponse.json(
      { error: "服务器内部错误", detail: error instanceof Error ? error.message : "未知错误" },
      { status: 500 },
    );
  }
}