const postgre = require('../database/postgre');

const analytics = async (req, res) => {
  try {
    const query = `
      SELECT
        '24h' AS period,
        COUNT(DISTINCT session_id) AS sessions,
        COUNT(*) FILTER (WHERE status = 1) AS chats,
        COUNT(DISTINCT user_id) AS users,
        COUNT(*) AS queries
      FROM useraskquestion
      WHERE created >= NOW() - INTERVAL '24 hours'

      UNION ALL

      SELECT
        '7d',
        COUNT(DISTINCT session_id),
        COUNT(*) FILTER (WHERE status = 1),
        COUNT(DISTINCT user_id),
        COUNT(*)
      FROM useraskquestion
      WHERE created >= NOW() - INTERVAL '7 days'

      UNION ALL

      SELECT
        '30d',
        COUNT(DISTINCT session_id),
        COUNT(*) FILTER (WHERE status = 1),
        COUNT(DISTINCT user_id),
        COUNT(*)
      FROM useraskquestion
      WHERE created >= NOW() - INTERVAL '30 days'

      UNION ALL

      SELECT
        'all',
        COUNT(DISTINCT session_id),
        COUNT(*) FILTER (WHERE status = 1),
        COUNT(DISTINCT user_id),
        COUNT(*)
      FROM useraskquestion;
    `;

    const result = await postgre.query(query);

    const response = {};

    result.rows.forEach(row => {
      response[row.period] = {
        sessions: Number(row.sessions),
        chats: Number(row.chats),
        users: Number(row.users),
        queries: Number(row.queries),
      };
    });

    return res.status(200).json({
      success: true,
      data: response,
    });

  } catch (error) {
    console.error("Analytics Error:", error);
    return res.status(500).json({
      success: false,
      message: error.message,
    });
  }
};
const analyticsLast7Days = async (req, res) => {
  try {

    const query = `
      SELECT
        DATE(created) AS date,
        COUNT(DISTINCT session_id) AS sessions,
        COUNT(*) FILTER (WHERE status = 1) AS chats,
        COUNT(DISTINCT user_id) AS users,
        COUNT(*) AS queries
      FROM useraskquestion
      WHERE created >= CURRENT_DATE - INTERVAL '6 days'
      GROUP BY DATE(created)
      ORDER BY DATE(created);
    `;

    const result = await postgre.query(query);

    return res.status(200).json({
      success: true,
      data: result.rows
    });

  } catch (error) {
    console.error("Analytics Error:", error);

    return res.status(500).json({
      success: false,
      message: error.message
    });
  }
};

module.exports = {
  analyticsLast7Days,analytics
};