local SubSystem = {}
local Reactive = require("Core.Reactive")
local Library = import("BusyGamePlayLibrary")
local GameplayStatics = import("GameplayStatics")
local BusyGamePlayLibrary = import("BusyGamePlayLibrary")


local function CreateItemGenerator(level_config_data)
    local Generator = require("GamePlay.Level.BusyLevelItemGenerator")

    local item_data = {}
    local period = level_config_data.Period
    for k, v in pairs(level_config_data.LevelItemIds) do
        item_data[k] = v.CountOfPeriod
    end
    return Generator(period, item_data)
end

function SubSystem:Bp_ShouldCreateSubsystem(world)
    return false
end

function SubSystem:ReceiveSubSystemInitialize()
    local world = BusyGamePlayLibrary.K2_GetWorld(self)
    self.start_time = GameplayStatics.GetTimeSeconds(world)

    self.proxy = Reactive.ReactiveProperty({
        current_seconds = 0
    })

end

function SubSystem:ReceiveWorldBeginPlay()
    local BusyActorManagerSubSystem = import("BusyActorManagerSubSystem").Get(self)

    -- 读取关卡配置
    local is_suc, row_data = Library.GetLevelBaseConfig("Default", nil)
    assert(is_suc == true, "Can't find level base config")
    self.level_base_config = row_data

    -- 创建物品生成器
    self.generator = CreateItemGenerator(row_data)

    -- 创建初始篝火
    local bonfire = BusyActorManagerSubSystem:SpawnBonfire(row_data.FirstBonfirePosition)

    -- 创建角色
    local role = BusyActorManagerSubSystem:SpawnRole(bonfire)
    GameplayStatics.GetPlayerController(self, 0):Possess(role)
end

function SubSystem:ReceiveSubSystemTick(DeltaTime)
    -- local proxy = self.proxy
    -- local world = BusyGamePlayLibrary.K2_GetWorld(self)
    -- local current_time = GameplayStatics.GetTimeSeconds(world)
    -- local escapse_time = math.floor(current_time - self.start_time)
    -- if escapse_time > proxy.current_seconds then
    --     self:TrySpawnLevelItem()
    --     proxy.current_seconds = escapse_time
    --     print(proxy.current_seconds)
    -- end
end

function SubSystem:TrySpawnLevelItem()
    local BusyActorManagerSubSystem = import("BusyActorManagerSubSystem").Get(self)
    local items = self.generator:Generate()
    for i, item_id in pairs(items) do
        BusyActorManagerSubSystem:SpawnLevelItem(item_id)
        print(i, item_id)
    end
end

return Class(nil, nil, SubSystem)