using System;
using System.Collections.Generic;
using System.Diagnostics;
using RobotAndDonkey.Game.Board;
using RobotAndDonkey.Game.Cards;
using RobotAndDonkey.Game.Execution.Results;
using RobotAndDonkey.Game.GameState;
using RobotAndDonkey.Game.Pois;

namespace RobotAndDonkey.Game.Intents;

public class DetoxiumPrime(Cell cell, Card card, EDirection direction) : Intent
{
    public override void Run(Guid requestId, CoreLoop coreLoop, List<Intent> newIntents, List<Result> results)
    {
        var neighbour = cell.Hex.GetNeighbour(Direction);
        var neighbourIndex = coreLoop.Board.FindCellIndex(neighbour);
        if (neighbourIndex < 0)
        {
            results.Add(new InvalidInstructionResult(requestId, EInvalidReason.OutOfBounds, card, cell));
        }
        else
        {
            var neighbourCell = coreLoop.Board.Cells[neighbourIndex];
            var newType = (neighbourCell.Type, Heal) switch
            {
                (ECellType.Blocked, true)  => ECellType.Mud,
                (ECellType.Rocky, true)    => ECellType.Grass,
                (ECellType.Mud, true)      => ECellType.Grass,
                (ECellType.Dry, true)      => ECellType.Grass,
                (ECellType.Grass, true)    => ECellType.Fertile,
                (ECellType.Grass, false)   => coreLoop.Random.Next(3) switch
                                              {
                                                  0 => ECellType.Dry,
                                                  1 => ECellType.Mud,
                                                  2 => ECellType.Rocky,
                                                  _ => throw new UnreachableException()
                                              },
                (ECellType.Fertile, false) => ECellType.Grass,
                (ECellType.Mud, false)     => ECellType.Blocked,
                _                          => (ECellType)(-1)
            };
            if (newType < 0)
            {
                results.Add(new InvalidInstructionResult(requestId, EInvalidReason.NoTarget, card, neighbourCell));
            }
            else
            {
                neighbourCell.Type = newType;
                results.Add(new CellTypeResult(requestId, new(coreLoop.Board), neighbourCell.Hex));
            }
        }

        base.Run(requestId, coreLoop, newIntents, results);
    }

    public EDirection Direction { get; set; } = direction;

    public bool Heal { get; set; } = true;

    public override bool IsValid(CoreLoop coreLoop) => base.IsValid(coreLoop) && cell.Poi is Avatar;

    public override string ToString() => $"Detox {Direction}, Heal={Heal}, " + base.ToString();
}