using Continentis.MainGame;
using Continentis.MainGame.Character;
using SLSUtilities.General;

namespace Continentis.Mods.Basic.Buffs
{
    /// <summary>
    /// 地缚（Earth 元素）：行动开始时固定减少 1 点体力（不随层数变化），然后层数 -1。
    /// 层数决定持续时间（多少回合会减少体力），不决定每次削减量。
    /// </summary>
    public sealed class Earthbind : CharacterCombatBuffBase
    {
        public Earthbind(int stack)
        {
            Initialize(BuffType.Negative, BuffDispelLevel.Basic);

            this.contentSubmodule = new ContentSubmodule(this)
                .AddParameterGetter("Stack", () => unitedStackSubmodule.stackAmount.ToString());

            this.iconSubmodule = new IconSubmodule(this);

            this.unitedStackSubmodule = new UnitedStackSubmodule(this, stack);

            this.eventSubmodule = new EventSubmodule(this);
            this.eventSubmodule.onActionStart.Add("Earthbind", new PrioritizedAction(OnActionStart));
        }

        private void OnActionStart()
        {
            // 固定减少 1 体力，Clamp 至 0
            attachedCharacter.ModifyAndClampAttribute(CharacterAttributes.Stamina, -1);

            unitedStackSubmodule.ReduceStack(1);
            iconSubmodule.Update();
        }

        public override bool OnBuffApply(out CharacterCombatBuffBase existingBuff)
        {
            MainGameManager.Instance.basePrefabs.GenerateInfoText(
                contentSubmodule.displayName, attachedCharacter.characterView);

            if (FindExistingSameBuff(out existingBuff))
            {
                existingBuff.unitedStackSubmodule.AddStack(this.unitedStackSubmodule.stackAmount);
                return false;
            }

            return true;
        }
    }
}