using Bobo.System.Maze.Bot.Interface;
using HightechICT.Amazeing.Client.Rest;
using Microsoft.Extensions.Logging;

namespace Bobo.System.Maze.Bot
{
    public class SimplerBot : BaseBot
    {
        public SimplerBot(AmazeingClient mazeClient, ILogger logger) : base(mazeClient, logger)
        {  }

        public override async Task<int> Run(MazeInfo maze)
        {
            if (MazeClient == null)
                throw new ArgumentException(nameof(MazeClient));

            if (string.IsNullOrWhiteSpace(maze.Name))
                throw new ArgumentException(nameof(maze.Name));

            Random random = new Random();
            Logger.Log(LogLevel.Information, "Entering maze '{MazeName}'", maze.Name);
            PossibleActionsAndCurrentScore result = await MazeClient.EnterMaze(maze.Name);
            Stack<Direction> directions = new Stack<Direction>();
            int collected = 0;

            do
            {
                if (result.PossibleMoveActions.All(m => m.HasBeenVisited))
                {
                    Logger.Log(LogLevel.Debug, "All adjacent tiles have been visited! Going back.");
                    Direction direction = directions.Pop();

                    switch (direction)
                    {
                        case Direction.Left:
                            direction = Direction.Right;
                            break;
                        case Direction.Right:
                            direction = Direction.Left;
                            break;
                        case Direction.Up:
                            direction = Direction.Down;
                            break;
                        case Direction.Down:
                            direction = Direction.Up;
                            break;

                    }

                    Logger.Log(LogLevel.Debug, "Moving {Direction}, I have been here.", direction);

                    result = await MazeClient.Move(direction);
                }
                else
                {
                    MoveAction[] notVisited = result.PossibleMoveActions.Where(m => !m.HasBeenVisited).ToArray();
                    Logger.Log(LogLevel.Debug, $"{string.Join(", ", notVisited.Select(m => m.Direction.ToString()))} have not been visited, selecting next move.");
                    int selected = random.Next(notVisited.Length - 1);
                    MoveAction moveAction = notVisited[selected];

                    Logger.Log(LogLevel.Debug, $"Moving {moveAction.Direction}, I have {(!moveAction.HasBeenVisited ? "not" : string.Empty)} been here.");

                    result = await MazeClient.Move(moveAction.Direction);

                    directions.Push(moveAction.Direction);
                }

                if (result.CanCollectScoreHere && result.CurrentScoreInHand > 0)
                {
                    collected += result.CurrentScoreInHand;
                    await MazeClient.CollectScore();
                }

                Logger.Log(LogLevel.Debug, $"New tile has {(!result.CanExitMazeHere ? "no" : string.Empty)} exit.");

            } while (!result.CanExitMazeHere);

            await MazeClient.ExitMaze();

            Logger.Log(LogLevel.Information, "Collected {Collected}!", collected);
            Logger.Log(LogLevel.Information, "Exited maze {MazeName}!", maze.Name);

            return collected;
        }
    }
}