namespace Game.Data {
    internal class Leaderboard {
        public static void WriteScore(string playerName, int score) {
            var oldScores = ReadScores();
            for (int i = 0; i < oldScores.Count; ++i) {
                if (oldScores[i].Item1 == playerName) {
                    oldScores.RemoveAt(i);
                    break;
                }
            }
            oldScores.Add((playerName, score));
            oldScores.Sort((a, b) => a.Item2.CompareTo(b.Item2));
            File.WriteAllLines("leaders.txt", oldScores.Select(score => score.Item1 + "\t" + score.Item2.ToString()));
        }

        public static List<(string, int)> ReadScores() {
            using StreamReader rd = new StreamReader("leaders.txt");
            List<(string, int)> scores = new List<(string, int)>();
            string? line = null;
            while ((line = rd.ReadLine()) != null) {
                if (line.Length > 0) {
                    string[] fields = line.Split('\t');
                    if (fields.Length < 2) continue;
                    int score;
                    if (!int.TryParse(fields[1], out score)) continue;
                    scores.Add((fields[0], score));
                }
            }
            scores.Sort((a, b) => a.Item2.CompareTo(b.Item2));
            return scores;
        }
    }
}