import type { APIRoute } from "astro";
import { mkdir, readdir, writeFile } from "node:fs/promises";
import { join } from "node:path";

const DATA_ROOT = join(process.env.REPO_ROOT ?? "/Users/ace/palacering", "palaces", "manglasabang", "palaceappsdata", "palacetravel");

export const POST: APIRoute = async ({ request }) => {
  const url = new URL(request.url);
  const tripId = url.searchParams.get("tripId");
  if (!tripId || tripId.includes("..")) {
    return new Response("Bad request", { status: 400 });
  }

  try {
    const { dayIndex, entry } = await request.json();
    if (typeof dayIndex !== "number" || !entry) {
      return new Response("Bad request: expected { dayIndex, entry }", { status: 400 });
    }

    const dayDir = join(DATA_ROOT, tripId, "actuals", `day-${dayIndex + 1}`);
    await mkdir(dayDir, { recursive: true });

    const existing = (await readdir(dayDir).catch(() => []))
      .filter(f => f.startsWith("entry-") && f.endsWith(".json"));
    const num = String(existing.length + 1).padStart(3, "0");

    await writeFile(join(dayDir, `entry-${num}.json`), JSON.stringify(entry, null, 2));
    return new Response(JSON.stringify({ ok: true }), {
      headers: { "Content-Type": "application/json" },
    });
  } catch (e) {
    return new Response(JSON.stringify({ error: String(e) }), { status: 500 });
  }
};