using PkmnLib.Plugin.Gen7.Scripts.Battle;
using PkmnLib.Plugin.Gen7.Scripts.Side;

namespace PkmnLib.Plugin.Gen7.Scripts.Moves;

[Script(ScriptCategory.Move, "future_sight")]
public class FutureSight : Script, IScriptStopBeforeMove
{
    /// <inheritdoc />
    public void StopBeforeMove(IExecutingMove move, ref bool prevent)
    {
        var battleData = move.User.BattleData;
        if (battleData == null)
            return;
        var battle = battleData.Battle;
        var moveChoice = move.MoveChoice;

        prevent = true;

        if (IsTargetAlreadySetToBeHit(battle, moveChoice.TargetSide, moveChoice.TargetPosition))
        {
            moveChoice.Fail();
            return;
        }

        if (battle.Volatile.TryGet<FutureSightEffect>(out var effect))
            effect.AddStrike(moveChoice);
        else
            battle.Volatile.Add(new FutureSightEffect(moveChoice));
    }

    private static bool IsTargetAlreadySetToBeHit(IBattle battle, byte side, byte position)
    {
        if (battle.Volatile.TryGet<FutureSightEffect>(out var futureSight) && futureSight.HasStrikeAt(side, position))
            return true;
        var doomDesire = battle.Sides[side].VolatileScripts.Get<DoomDesireEffect>();
        return doomDesire != null && doomDesire.HasTarget(position);
    }
}