--控制单位进行 直行 -> 升轨 -> 圆周的运动

local base = require("Battle/Logic/AI/Decision/Decision_Base")
local Decision_HarassMove = class("Decision_HarassMove", base)

local EPhase = {
    CLOSE_TO = 1,           --接近
    FAR_AWAY = 2,           --远离
    EXIT = 3,               --退出
}

function Decision_HarassMove:initialize(entity)
	--类型
    self.Type = LuaConst.DecisionType.HarassMove
    --是否是瞬时
    self.IsOnce = false
end

--[[
    进入该Decision
--]]
function Decision_HarassMove:DecisionIn(entity, decisionData)
    local decisionRecordDic = entity.components.aiBase:GetDecisionRecordDic(decisionData)
    self:CommonConditionalSkillStringParamParse(decisionData, decisionRecordDic, entity)
    decisionRecordDic.changePhaseDistSqr = FP.newV1(math.abs(decisionData.IntParam2) + math.abs(decisionData.IntParam3))
    decisionRecordDic.changePhaseDistSqr:Mul(math.abs(decisionData.IntParam2) + math.abs(decisionData.IntParam3))
    decisionRecordDic.sideOffset = decisionData.IntParam3
    self:ChangePhase(EPhase.CLOSE_TO, decisionRecordDic, entity)
end

function Decision_HarassMove:ChangePhase(newPhase, decisionRecordDic, entity, decisionData)
    if decisionRecordDic.phase ~= newPhase then
        decisionRecordDic.phase = newPhase
        decisionRecordDic.phaseFrameEla = 0

        if newPhase == EPhase.CLOSE_TO then

        elseif newPhase == EPhase.FAR_AWAY then

        end
    else
        logging.error(LTAG.ERROR, "HYW :警告！ 试图重复设置phase @Decision_HarassMove（程序调试代码，测试可以忽略）")
    end
end

--[[
    退出该Decision
--]]
function Decision_HarassMove:DecisionOut(entity, decisionData)
    base.DecisionOut(self, entity, decisionData)
    entity.components.aiBase:SetAiRecord("DetourRoundMoveTimeEla", nil)
end

--[[
    能否进入
--]]
function Decision_HarassMove:CanEnter(entity, decisionData, command)
    --有目标才能进入
    return entity.components.target.Target ~= nil
end

--[[
    能否退出
--]]
function Decision_HarassMove:CanExit(entity, decisionData, command)
    local decisionRecordDic = entity.components.aiBase:GetDecisionRecordDic(decisionData)
    --如果没有目标就退出
    return entity.components.target.Target == nil or decisionRecordDic.phase == EPhase.EXIT
end

local _tempV1 = FP.newV1(0)
local _tempV2 = FP.newV2(0, 0)
--[[
    修饰指令（修饰command）
--]]
function Decision_HarassMove:SetCommand(entity, decisionData, command)
	local decisionRecordDic = entity.components.aiBase:GetDecisionRecordDic(decisionData)
    local deltaFrame = 0    --两次SetCommand之间的间隔
    if decisionRecordDic.lastSetCommandFrame then
        deltaFrame = LogicUpdateManager._clientHandleFrame - decisionRecordDic.lastSetCommandFrame
    end
    decisionRecordDic.lastSetCommandFrame = LogicUpdateManager._clientHandleFrame

    decisionRecordDic.phaseFrameEla = decisionRecordDic.phaseFrameEla + deltaFrame
    if decisionRecordDic.phase == EPhase.CLOSE_TO then
        local target = entity.components.target.Target
        if target then
            _tempV2:Reset(target:GetLogicPos())
            _tempV2:Sub(entity:GetLogicPos()) --此时_tempV2是从entity指向target的向量
            local sideOffset = FP.V2.GetRightByForward(_tempV2)  --支持横向偏移
            sideOffset:Normalize()
            sideOffset:Mul(decisionRecordDic.sideOffset)
            _tempV2:Add(sideOffset) --此时_tempV2是从entity指向目标位置(带偏移的)的向量，也就是距离向量
            FP.V2.SqrMagnitude(_tempV2, _tempV1)  -- _tempV1是entity跟目标位置(带偏移的)的距离
            _tempV2:Normalize() --_tempV2此时是从entity指向目标位置的单位向量
            if _tempV1 <= decisionRecordDic.changePhaseDistSqr then
                decisionRecordDic.farAwayDir = _tempV2:cloneV2()
                self:ChangePhase(EPhase.FAR_AWAY, decisionRecordDic, entity, decisionData)
            else
                command.MoveDir:Reset(_tempV2)
                command.RotateDir:Reset(command.MoveDir)
            end

            self:CommonIntervalUseConditionalSkill(decisionRecordDic, entity, deltaFrame * LuaConst.TimeSpanMs, command)
        end
    elseif decisionRecordDic.phase == EPhase.FAR_AWAY then
        command.MoveDir:Reset(decisionRecordDic.farAwayDir)
        command.RotateDir:Reset(command.MoveDir)

        if decisionRecordDic.phaseFrameEla > decisionData.IntParam1 then
            self:ChangePhase(EPhase.EXIT, decisionRecordDic, entity, decisionData)
        end
    end
    return command
end

return Decision_HarassMove