using cfg.SkillCfg;
using Gameplay.Skill;
using Gameplay.Unit;
using Gameplay.Unit.Data;
namespace Gameplay.Area
{
    public class AreaChecker
    {
        public GameUnit owner;

        public int troopId;
        public int influenceId;
        public EReleaseCheckType checkType;

        public void InitFromCharacterSkill(SkillHandle skillHandle)
        {
            var unit = skillHandle.owner;
            owner = unit;
            influenceId = skillHandle.runtimeData.configData.InfluenceAreaId;
            checkType = skillHandle.runtimeData.configData.ReleaseCheckType;
            troopId = unit.commonData.troopId;
        }

        public void InitFromPlayerSkill(DataPlayerSkill skillConfig, int troopId)
        {
            owner = null;
            influenceId = skillConfig.InfluenceAreaId;
            checkType = skillConfig.ReleaseCheckType;
            this.troopId = troopId;
        }
        
        public bool CheckAvailable(int cellIndex)
        {
            switch (checkType)
            {
                // 常规
                case EReleaseCheckType.None:
                    return true;
                case EReleaseCheckType.CenterIsEnemy:
                    return _CheckCenterIsEnemy(cellIndex);
                case EReleaseCheckType.CenterIsSelfSide:
                    return _CheckCenterIsSelfSide(cellIndex);
                case EReleaseCheckType.CenterIsEmpty:
                    return _CheckCenterIsEmpty(cellIndex);
                case EReleaseCheckType.AreaContainsEnemy:
                    return _CheckAreaContainsEnemy(cellIndex);
                case EReleaseCheckType.AreaContainsSelfSide:
                    return _CheckAreaContainsSelfSide(cellIndex);
                case EReleaseCheckType.CenterIsSelfVehicle:
                    return _CheckCenterIsSelfVehicle(cellIndex);
                case EReleaseCheckType.DeadUnitInSelfPrepare:
                    return _CheckHasSelfDeadCharacters();
                default:
                    DebugUtil.LogError("暂未处理的检查类型:{0}", checkType);
                    return false;
            }
            return true;
        }

        private bool _CheckHasSelfDeadCharacters()
        {
            for (int i = 0; i < GameUnitManager.instance.deadUnits.count; i++)
            {
                var unit = GameUnitManager.instance.deadUnits.GetByIndex(i);
                if (unit.commonData.troopId != troopId)
                {
                    continue;
                }
                if (unit.gameunitType != EGameUnitType.Character)
                {
                    continue;
                }
                return true;
            }
            return false;
        }

        private bool _CheckCenterIsSelfVehicle(int centerCellIndex)
        {
            var units = AreaManager.instance.GetUnitsByCellIndex(centerCellIndex);
            var senderTroopId = troopId;
            var isSelf = false;
            for (var i = 0; i < units.Count; ++i)
            {
                var u = units[i];
                if (u.gameunitType != EGameUnitType.Vehicle) continue;
                if (u.commonData.troopId == senderTroopId)
                {
                    isSelf = true;
                    break;
                }
            }
            return isSelf;
        }
        
        private bool _CheckAreaContainsSelfSide(int centerCellIndex)
        {
            var influenceAreaId = influenceId;
            var areaIndexs = AreaManager.instance.GetCellIndexs(centerCellIndex, influenceAreaId);
            // 查找所有友军
            for (var i = 0; i < areaIndexs.Count; ++i)
            {
                var searchCellIndex = areaIndexs[i];
                var isSelf = _CheckCenterIsSelfSide(searchCellIndex);
                if (isSelf) return true;
            }
            return false;
        }

        private bool _CheckAreaContainsEnemy(int centerCellIndex)
        {
            var influenceAreaId = influenceId;
            var areaIndexs = AreaManager.instance.GetCellIndexs(centerCellIndex, influenceAreaId);
            // 查找所有敌人
            for (var i = 0; i < areaIndexs.Count; ++i)
            {
                var searchCellIndex = areaIndexs[i];
                var isEnemy = _CheckCenterIsEnemy(searchCellIndex);
                if (isEnemy) return true;
            }
            return false;
        }
        
        private bool _CheckCenterIsEmpty(int centerCellIndex)
        {
            var units = AreaManager.instance.GetUnitsByCellIndex(centerCellIndex);
            var isEmpty = units.Count == 0;
            return isEmpty;
        }            

        private bool _CheckCenterIsSelfSide(int centerCellIndex)
        {
            var units = AreaManager.instance.GetUnitsByCellIndex(centerCellIndex);
            var senderTroopId = troopId;
            var isSelf = false;
            for (var i = 0; i < units.Count; ++i)
            {
                var u = units[i];
                if (u.gameunitType != EGameUnitType.Character) continue;
                if (u.commonData.troopId == senderTroopId)
                {
                    isSelf = true;
                    break;
                }
            }
            return isSelf;
        }

        private bool _CheckCenterIsEnemy(int centerCellIndex)
        {
            var units = AreaManager.instance.GetUnitsByCellIndex(centerCellIndex);
            var senderTroopId = troopId;
            var isEnemy = false;
            for (var i = 0; i < units.Count; ++i)
            {
                var u = units[i];
                if (u.gameunitType != EGameUnitType.Character) continue;
                if (u.commonData.troopId != senderTroopId)
                {
                    isEnemy = true;
                    break;
                }
            }
            return isEnemy;
        }
    }
}