CREATE TABLE app_data(id TEXT PRIMARY KEY DEFAULT 'main',data JSONB,updated_at TIMESTAMPTZ DEFAULT NOW());
ALTER TABLE app_data ENABLE ROW LEVEL SECURITY;
CREATE POLICY "allow_all" ON app_data FOR ALL USING(true) WITH CHECK(true);

export default {
  async fetch(req) {
    const cors = {
      'Access-Control-Allow-Origin': '*',
      'Access-Control-Allow-Methods': 'GET, POST, OPTIONS',
      'Access-Control-Allow-Headers': 'Content-Type'
    };
    // CORS preflight
    if (req.method === 'OPTIONS') {
      return new Response(null, { headers: cors });
    }
    // GET: 動作確認用（ブラウザ直アクセスでも正常応答）
    if (req.method === 'GET') {
      return new Response(
        JSON.stringify({ ok: true, running: true, message: 'LINE WORKS Proxy is running' }),
        { headers: { 'Content-Type': 'application/json', ...cors } }
      );
    }
    // POST: JSONボディを解析
    let body;
    try {
      body = await req.json();
    } catch (e) {
      return new Response(
        JSON.stringify({ ok: false, error: 'JSON parse error: ' + e.message }),
        { status: 400, headers: { 'Content-Type': 'application/json', ...cors } }
      );
    }
    const { webhookUrl, message } = body;
    // 接続テスト用（__test__ または空）
    if (!webhookUrl || webhookUrl === '__test__') {
      return new Response(
        JSON.stringify({ ok: true, status: 200, test: true }),
        { headers: { 'Content-Type': 'application/json', ...cors } }
      );
    }
    // LINE WORKS に転送 ★ 正しいフォーマット: { content: { type, text } }
    try {
      const res = await fetch(webhookUrl, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ body: { text: message } })  // ★ LINE WORKS 正しいフォーマット
      });
      return new Response(
        JSON.stringify({ ok: res.ok, status: res.status }),
        { headers: { 'Content-Type': 'application/json', ...cors } }
      );
    } catch (e) {
      return new Response(
        JSON.stringify({ ok: false, error: e.message }),
        { status: 500, headers: { 'Content-Type': 'application/json', ...cors } }
      );
    }
  }
};