const { db } = require('../db');

function saveCourseToDB(courseData) {
  return new Promise((resolve, reject) => {
    db.run(
      `INSERT OR REPLACE INTO courses (name, link, city, last_updated)
       VALUES (?, ?, ?, datetime('now'))`,
      [courseData.name, courseData.link, courseData.city],
      function(err) {
        if (err) reject(err);
        else resolve(this.lastID);
      }
    );
  });
}

function getAllCoursesFromDB() {
  return new Promise((resolve, reject) => {
    db.all(
      'SELECT * FROM courses ORDER BY name ASC',
      [],
      (err, rows) => {
        if (err) reject(err);
        else resolve(rows);
      }
    );
  });
}

function saveLayoutToDB(courseId, layoutData) {
  return new Promise((resolve, reject) => {
    db.run(
      `INSERT OR IGNORE INTO layouts (course_id, name, par)
       VALUES (?, ?, ?)`,
      [courseId, layoutData.name, layoutData.par],
      function(err) {
        if (err) reject(err);
        else resolve(this.lastID);
      }
    );
  });
}

function getLayoutsForCourse(courseId) {
  return new Promise((resolve, reject) => {
    db.all(
      'SELECT * FROM layouts WHERE course_id = ? ORDER BY last_played DESC, name ASC',
      [courseId],
      (err, rows) => {
        if (err) reject(err);
        else resolve(rows);
      }
    );
  });
}

function updateLayoutRating(courseId, layoutName, par, meanRating, ratingCount, lastPlayed = null) {
  return new Promise((resolve, reject) => {
    db.run(
      `UPDATE layouts
       SET mean_rating = ?, rating_count = ?, last_calculated = datetime('now'), last_played = ?
       WHERE course_id = ? AND name = ? AND par = ?`,
      [meanRating, ratingCount, lastPlayed, courseId, layoutName, par],
      function(err) {
        if (err) reject(err);
        else resolve(this.changes);
      }
    );
  });
}

module.exports = {
  saveCourseToDB,
  getAllCoursesFromDB,
  saveLayoutToDB,
  getLayoutsForCourse,
  updateLayoutRating
};