import { NextResponse } from "next/server";
import { auth } from "@/app/(auth)/auth";
import {
  getEditableAgentPsdTemplateLayers,
  type AgentPsdTemplateListResponse,
} from "@/lib/agents/psd-template-config";
import { readAgentPsdTemplates } from "@/lib/agents/psd-template-settings";

export const runtime = "nodejs";
export const dynamic = "force-dynamic";

function jsonError(status: number, error: string) {
  const payload: AgentPsdTemplateListResponse = {
    success: false,
    templates: [],
    error,
  };
  return NextResponse.json(payload, { status });
}

export async function GET() {
  const session = await auth().catch(() => null);
  if (!session?.user?.id) {
    return jsonError(401, "未登录");
  }

  try {
    const templates = (await readAgentPsdTemplates())
      .filter((template) => template.status === "active")
      .map((template) => ({
        ...template,
        layers: getEditableAgentPsdTemplateLayers(template),
      }))
      .filter((template) => template.layers.length > 0);

    return NextResponse.json({
      success: true,
      templates,
    } satisfies AgentPsdTemplateListResponse);
  } catch (error) {
    console.error("[PSD Templates] list failed:", error);
    return jsonError(503, "PSD 模板读取失败");
  }
}