namespace AdventOfCode.Solutions._2022.Day02
{
    internal class GameRules
    {
        private static int Win = 6, Draw = 3, Lost = 0, Rock = 1, Paper = 2, Scissors = 3;

        private static string OpponentRock = "A", OpponentPaper = "B", OpponentScissors = "C",
                                PlayRock = "X", PlayPaper = "Y", PlayScissors = "Z",
                                PlayWin = "Z", PlayDraw = "Y", PlayLose = "X";

        private static Dictionary<string, int> PossibleScores { get; set; }

        internal static void BuildScoreDic()
        {
            if (PossibleScores == null)
            {
                PossibleScores = new Dictionary<string, int>
                {
                    // Rock combos
                    { OpponentRock + " " + PlayPaper, Paper + Win }, // win
                    { OpponentRock + " " + PlayRock, Rock + Draw }, // draw
                    { OpponentRock + " " + PlayScissors, Scissors + Lost }, // lose

                    // Paper
                    { OpponentPaper + " " + PlayScissors, Scissors + Win }, // win
                    { OpponentPaper + " " + PlayPaper, Paper + Draw }, // draw
                    { OpponentPaper + " " + PlayRock, Rock + Lost }, // lose

                    // Scissors
                    { OpponentScissors + " " + PlayRock, Rock + Win }, // win
                    { OpponentScissors + " " + PlayScissors, Scissors + Draw }, // draw
                    { OpponentScissors + " " + PlayPaper, Paper + Lost } // lose
                };
            }
        }

        internal static void BuildWinDrawLoseTable()
        {
            if (PossibleScores == null)
            {
                PossibleScores = new Dictionary<string, int>
                {
                    // Rock combos
                    { OpponentRock + " " + PlayWin, Paper + Win }, // win
                    { OpponentRock + " " + PlayDraw, Rock + Draw }, // draw
                    { OpponentRock + " " + PlayLose, Scissors + Lost }, // lose

                    // Paper
                    { OpponentPaper + " " + PlayWin, Scissors + Win }, // win
                    { OpponentPaper + " " + PlayDraw, Paper + Draw }, // draw
                    { OpponentPaper + " " + PlayLose, Rock + Lost }, // lose

                    // Scissors
                    { OpponentScissors + " " + PlayWin, Rock + Win }, // win
                    { OpponentScissors + " " + PlayDraw, Scissors + Draw }, // draw
                    { OpponentScissors + " " + PlayLose, Paper + Lost } // lose
                };
            }
        }

        internal static int GetScore(string play) => PossibleScores[play];
    }
}