import type { APIRoute } from 'astro';
import { readFile, writeFile } from 'fs/promises';
import { join } from 'path';

const TASKS_PATH = join(process.cwd(), '..', 'palaces', 'manglasabang', 'palaceappsdata', 'palacetasks', 'tasks.json');

interface Task {
  id: string;
  text: string;
  done: boolean;
  created: string;
}

async function load(): Promise<Task[]> {
  try {
    return JSON.parse(await readFile(TASKS_PATH, 'utf-8'));
  } catch {
    return [];
  }
}

async function save(tasks: Task[]) {
  await writeFile(TASKS_PATH, JSON.stringify(tasks, null, 2) + '\n');
}

export const GET: APIRoute = async () => {
  return new Response(JSON.stringify(await load()), {
    headers: { 'Content-Type': 'application/json' },
  });
};

export const POST: APIRoute = async ({ request }) => {
  const body = await request.json();
  const tasks = await load();

  if (body.action === 'add') {
    tasks.push({
      id: String(Date.now()),
      text: body.text,
      done: false,
      created: new Date().toISOString(),
    });
  } else if (body.action === 'toggle') {
    const t = tasks.find(t => t.id === body.id);
    if (t) t.done = !t.done;
  } else if (body.action === 'delete') {
    const idx = tasks.findIndex(t => t.id === body.id);
    if (idx !== -1) tasks.splice(idx, 1);
  }

  await save(tasks);
  return new Response(JSON.stringify(tasks), {
    headers: { 'Content-Type': 'application/json' },
  });
};