using RobotAndDonkey.Game.Cards;
using RobotAndDonkey.Game.Data;
using RobotAndDonkey.Game.Execution;
using RobotAndDonkey.Game.Execution.Results;
using RobotAndDonkey.Game.GameState;

namespace RobotAndDonkey.Game.Intents;

public class MoveCards(Guid[] orderedCardIds, Guid[] tapeCardIds) : Intent
{
    public override void Run(Guid requestId, CoreLoop coreLoop, List<Intent> newIntents, List<Result> results)
    {
        var pool = coreLoop.ProgramRow.ToDictionary(card => card.CardId);
        var orderedCards = new List<Card>(orderedCardIds.Length);
        foreach (var cardId in orderedCardIds)
        {
            if (pool.TryGetValue(cardId, out var card))
                orderedCards.Add(card);
        }

        var tapeSet = tapeCardIds.ToHashSet();
        var tapeCards = orderedCards.Where(card => tapeSet.Contains(card.CardId)).ToList();
        var handCards = orderedCards.Where(card => !tapeSet.Contains(card.CardId)).ToList();

        var occupiedHandSpace = handCards.Select(c => c.OccupiedSpace).Sum();
        if (occupiedHandSpace > coreLoop.Currency.HandSize)
        {
            results.Add(new InvalidInstructionResult(requestId, EInvalidReason.NoSpace, null, null));
            return;
        }

        var occupiedTapeSpace = tapeCards.Select(c => c.OccupiedSpace).Sum();
        if (occupiedTapeSpace > coreLoop.Currency.TapeLength)
        {
            results.Add(new InvalidInstructionResult(requestId, EInvalidReason.NoSpace, null, null));
            return;
        }

        coreLoop.SetProgramRow(orderedCards, tapeSet);

        results.Add(new ProgramRowResult(requestId, coreLoop.ProgramRow.ToArray(), coreLoop.TapeCardIds));
        results.Add(new HandResult(requestId, handCards.ToArray()));
        results.Add(new TapeResult(requestId, tapeCards.ToArray()));

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

    public override bool IsValid(CoreLoop coreLoop)
    {
        if (!base.IsValid(coreLoop))
            return false;

        var inputSet = orderedCardIds.ToHashSet();
        if (inputSet.Count != orderedCardIds.Length)
            return false;

        var coreLoopSet = coreLoop.ProgramRow.Select(card => card.CardId).ToHashSet();
        if (!coreLoopSet.SetEquals(inputSet))
            return false;

        foreach (var cardId in tapeCardIds)
        {
            if (!inputSet.Contains(cardId))
                return false;
        }

        return coreLoop.RunPhase == ERunPhase.ExecuteProgram;
    }

    public override bool Immune => true;

    public override string ToString() => $"Rearrange, Ordered={string.Join(", ", orderedCardIds.Select(c => c.ToString()))}, Tape={string.Join(", ", tapeCardIds.Select(c => c.ToString()))}, " + base.ToString();
}