Pick a Cute Story to Read! 📚✨

-- Cloudflare D1 Schema for Little Blossoms Stories
CREATE TABLE IF NOT EXISTS custom_stories (
  id TEXT PRIMARY KEY,
  title TEXT NOT NULL,
  title_ar TEXT,
  category TEXT DEFAULT 'Teacher',
  emoji TEXT DEFAULT '🌟',
  story_type TEXT DEFAULT 'illustrated',
  pages_json TEXT NOT NULL,
  quiz_json TEXT NOT NULL,
  created_at INTEGER DEFAULT (strftime('%s', 'now'))
);

-- Stores IDs of hardcoded stories deleted by the teacher
CREATE TABLE IF NOT EXISTS deleted_builtin_stories (
  story_id TEXT PRIMARY KEY,
  deleted_at INTEGER DEFAULT (strftime('%s', 'now'))
);

export async function onRequest(context) {
  const { request, env } = context;
  const url = new URL(request.url);
  const cors = {
    "Access-Control-Allow-Origin": "*",
    "Access-Control-Allow-Methods": "GET, POST, DELETE, OPTIONS",
    "Access-Control-Allow-Headers": "Content-Type",
    "Content-Type": "application/json"
  };
  if (request.method === "OPTIONS") return new Response(null, { headers: cors });

  // GET all custom stories + deleted hardcoded story IDs
  if (request.method === "GET") {
    const { results: customStories } = await env.DB.prepare(
      "SELECT * FROM custom_stories ORDER BY created_at DESC"
    ).all();
    const { results: deletedRows } = await env.DB.prepare(
      "SELECT story_id FROM deleted_builtin_stories"
    ).all();
    return new Response(JSON.stringify({
      customStories: customStories.map(r => ({
        id: r.id, title: r.title, titleAr: r.title_ar,
        category: r.category, emoji: r.emoji, storyType: r.story_type,
        pages: JSON.parse(r.pages_json), quiz: JSON.parse(r.quiz_json),
        isBuiltin: false
      })),
      deletedBuiltinIds: deletedRows.map(r => r.story_id)
    }), { headers: cors });
  }

  // POST new story or restore built-in stories
  if (request.method === "POST") {
    const body = await request.json();
    if (body.action === "restore_builtins") {
      await env.DB.prepare("DELETE FROM deleted_builtin_stories").run();
      return new Response(JSON.stringify({ ok: true }), { headers: cors });
    }
    const s = body.story;
    await env.DB.prepare(
      `INSERT OR REPLACE INTO custom_stories
       (id, title, title_ar, category, emoji, story_type, pages_json, quiz_json)
       VALUES (?, ?, ?, ?, ?, ?, ?, ?)`
    ).bind(
      s.id, s.title, s.titleAr || "", s.category || "Teacher",
      s.emoji || "🌟", s.storyType || "illustrated",
      JSON.stringify(s.pages), JSON.stringify(s.quiz)
    ).run();
    return new Response(JSON.stringify({ ok: true, id: s.id }), { headers: cors });
  }

  // DELETE a hardcoded story (tombstone) or teacher story
  if (request.method === "DELETE") {
    const id = url.searchParams.get("id");
    const isBuiltin = url.searchParams.get("builtin") === "1";
    if (isBuiltin) {
      await env.DB.prepare(
        "INSERT OR IGNORE INTO deleted_builtin_stories (story_id) VALUES (?)"
      ).bind(id).run();
    } else {
      await env.DB.prepare("DELETE FROM custom_stories WHERE id = ?").bind(id).run();
    }
    return new Response(JSON.stringify({ ok: true, deletedId: id }), { headers: cors });
  }

  return new Response(JSON.stringify({ error: "Method not allowed" }), { status: 405, headers: cors });
}