local FuncNode_Distance = class("FuncNode_Distance")
local RetinueSystem = require"Battle/Logic/Entity/System/RetinueSystem"

--[[
	初始化
--]]
function FuncNode_Distance:initialize(entity)
    self.LimitChildCount = 2
    self.Type = LuaConst.ConditionFuncType.Distance
end

function FuncNode_Distance:GetPosByType(posType, entity)
    if posType == FP.Const.Zero then
        return entity:GetLogicPos()
    elseif posType == FP.Const.One then
        return entity.components.target.Target and entity.components.target.Target:GetLogicPos()
    elseif posType == FP.Const.Two then
        logging.error(LTAG.ERROR, "HYW : 暂不支持的类型 @FuncNode_Distance  请联系战斗程序添加  posType : ", posType)
    elseif posType == FP.Const.Three then
        logging.error(LTAG.ERROR, "HYW : 暂不支持的类型 @FuncNode_Distance  请联系战斗程序添加  posType : ", posType)
    elseif posType == FP.Const.Four then
        logging.error(LTAG.ERROR, "HYW : 暂不支持的类型 @FuncNode_Distance  请联系战斗程序添加  posType : ", posType)
    elseif posType == FP.Const.Five then
        logging.error(LTAG.ERROR, "HYW : 暂不支持的类型 @FuncNode_Distance  请联系战斗程序添加  posType : ", posType)
    elseif posType == FP.Const.Six then
        return entity.components.target.FollowTarget and entity.components.target.FollowTarget:GetLogicPos()
    elseif posType == FP.Const.Seven then
        return entity:GetMasterEntity() and entity:GetMasterEntity():GetLogicPos()
    elseif posType == FP.Const.Eight then
        return RetinueSystem.GetRetinueFollowPos(entity)
    end
end

--[[
	执行
--]]
function FuncNode_Distance:Run(conditionDataNode, entity, missile)
    local startType = conditionDataNode.FirstNode:Run(entity, missile)
    local endType = conditionDataNode.SecondNode:Run(entity, missile)

    --到目标的距离
    if startType == FP.Const.Zero and endType == FP.Const.One
        or startType == FP.Const.One and endType == FP.Const.Zero then
        return entity.components.target.ToTargetDisSqr
    end

    --到群组领袖的距离
    if startType == FP.Const.Zero and endType == FP.Const.Four
            or startType == FP.Const.Four and endType == FP.Const.Zero then
        return entity.components.group.ToLeaderDisSqr
    end

     --到跟随目标的距离
    if startType == FP.Const.Zero and endType == FP.Const.Six
        or startType == FP.Const.Six and endType == FP.Const.Zero then
        return entity.components.target.ToFollowTargetDisSqr
    end
    
    if startType == FP.Const.Zero and endType == FP.Const.Seven then
        if entity:GetMasterEntity() then
            return entity:GetLogicPos():DistanceSqr(entity:GetMasterEntity():GetLogicPos())
        end
    end


    local startPos = self:GetPosByType(startType, entity)
    if startPos then
        local endPos = self:GetPosByType(endType, entity)
        if endPos then
            return (endPos - startPos):SqrMagnitude()
        end
    end

    return FP.Const.Zero
end

return FuncNode_Distance