--移动
local DriveSystem = {}

local private = {}
local FP=FP
local _aimAddTemp = FP.newV1(0)
local _v2Temp = FP.newV2(0,0)
local LuaConst=LuaConst

function DriveSystem.OnBorn(entity)
    --载具有自己的出生旋转朝向
    if entity:IsVehicle() then
        local moveComp = entity.components.move
        local driveComp = entity.components.drive
        local driveData = driveComp:GetDriveData()
        local bornAngle = driveData.BornAngle
        if FP.Math.Abs(bornAngle) > driveData.AngleMax then
            logging.error("LTAG.ERROR" , "[关卡策划注意] ：载具的出生角度大过了AngleMax ，这不允许！")
        end
        local dir = FP.V2.GetOffsetToAngle(bornAngle, moveComp.LogicRotateDir)
        moveComp.LastLogicRotateDir:Reset(moveComp.LogicRotateDir)
        moveComp:SetLogicRotateDir(dir)
    end
    
end

function DriveSystem.OnDead(entity)
    local driveComp = entity.components.drive
    if driveComp then
        if driveComp.DriveEntity then
            SystemManager.OffDrive(entity, true)
        end
        if driveComp.BeDrivedByEntity then
            local driver = driveComp.BeDrivedByEntity
            SystemManager.OffDrive(driver, true)
            BattleEventSystem.AfterDrivedVehicleDead(entity, driver)            
        end
    end
end

function DriveSystem.DriveEntity(entity ,carEntity)
    local driveComp = entity.components.drive
    driveComp:SetDrivedEntity(carEntity)
end

function DriveSystem.OffDriveEntity(entity)
    local driveComp = entity.components.drive
    driveComp:ResetDrivedEntity()
end


--被驾驶的车，打击目标点的移动
function DriveSystem.OnLogicUpdate(entity)    
    local driveComp = entity.components.drive
    if (not driveComp.BeDrived) or (not driveComp.IsFirstPerspective) then
        return
    end

    local moveComponent = entity.components.move
    if moveComponent.WantRotateDir == FP.Const.Vector2_Zero then
        return
    end

    local y =  moveComponent.WantRotateDir.z
    
    local halfControlRate = moveComponent.IsHalfDir and 0.6 or 1
    
    local disSpeed = driveComp.realDisSpeed or ( driveComp.DriveData.DisSpeed * FP.Math.Abs(y) )
    
    if y > FP.Const.Zero then --远离
        _aimAddTemp:Reset(disSpeed):Mul(LuaConst.TimeSpan):Mul(halfControlRate)
        driveComp.AimPosZ:Add( _aimAddTemp)
        if driveComp.AimPosZ > driveComp.DriveData.DisMax then
            driveComp.AimPosZ:Reset(driveComp.DriveData.DisMax)
        end
    else -- 拉近
        _aimAddTemp:Reset(disSpeed):Mul(LuaConst.TimeSpan):Mul(halfControlRate)
        driveComp.AimPosZ:Sub( _aimAddTemp)
        if driveComp.AimPosZ < driveComp.DriveData.DisMin then
            driveComp.AimPosZ:Reset(driveComp.DriveData.DisMin)
        end
    end       
    
        
end


return DriveSystem