"use server";

import { NextResponse } from "next/server";
import { createDefaultTableSnapshot } from "@/lib/online-table";
import { createSupabaseRouteClient } from "@/lib/supabase/server";
import type { DocumentTableSnapshot, TableSchema } from "@/types/online-table";

const fallbackSchema: TableSchema = {
  columns: [],
  frozenRowCount: 0,
  frozenColCount: 0,
};

export async function POST(request: Request) {
  const url = new URL(request.url);
  const gridKey = url.searchParams.get("gridKey");

  if (!gridKey) {
    return NextResponse.json({ code: 400, msg: "gridKey 参数缺失" }, { status: 400 });
  }

  const supabase = await createSupabaseRouteClient();
  const { data, error } = await supabase
    .from("document_tables")
    .select("schema,snapshot")
    .eq("grid_key", gridKey)
    .single();

  if (error || !data) {
    return NextResponse.json({ code: 404, msg: "未查询到相关数据" }, { status: 404 });
  }

  const snapshot = (data.snapshot as DocumentTableSnapshot | null) ?? null;
  const schema = (data.schema as TableSchema | null) ?? fallbackSchema;

  let payload: unknown[] = [];
  if (snapshot?.luckysheet && Array.isArray(snapshot.luckysheet)) {
    payload = snapshot.luckysheet;
  } else {
    const defaultSnapshot = createDefaultTableSnapshot(schema);
    payload = defaultSnapshot.luckysheet ?? [];
  }

  const body = JSON.stringify(payload);
  return new NextResponse(body, {
    headers: { "Content-Type": "text/plain; charset=utf-8" },
  });
}