using Cal;
using System;
using System.Collections.Generic;

namespace ET
{
    public static class SelectSingleTargetSystem
    {

        public static TargetableUnitBase GetTarget(this SelectSingleTarget self, ISkillSender skillSender)
        {
            if (skillSender?.caster == null)
            {
                Log.Error($"skillSender is null :{skillSender == null} caster is null :{skillSender?.caster == null}");
                return null;
            }
            TargetableUnitComponent component = skillSender.caster.GetComponent<TargetableUnitComponent>();
            if (component == null)
            {
                Log.Error($"战斗已经结束");
                return null;
            }
            Unit target = null;
            switch (self.targetType)
            {
                case SingleTargetType.施法者:
                    target = skillSender.caster;
                    break;
                case SingleTargetType.目标:
                    target = component.currTarget;
                    break;
                case SingleTargetType.攻击者:
                    target = skillSender.caster;
                    break;
                case SingleTargetType.modifier附着者:
                    if (skillSender is not ModifierSkillSender modifierSkillSender)
                        Log.Error($"{skillSender} is not modifier,skillLogicId = {skillSender.skillLogic.skillId}");
                    else
                        target = modifierSkillSender.target;
                    break;
                default:
                    break;
            }

            TargetableSingleUnit targetableSingleUnit = EntityFactory.Create<TargetableSingleUnit, Unit>(Game.Scene, target);
            return targetableSingleUnit;
        }
    }
}