--[[
    本地数据存储,分为两类：
    1、设备级别的数据，保存和设备有关的数据，比如性能档位等，这些数据会在所有用户之间共享
    2、用户级别的数据，和账号ID绑定，不同用户角色之间的数据相互不影响

    解析本地数据
    local Infrast = require("Infrast/Infrast")
    local path = "Storage/PlayerData"
    if LuaExt.FileExists(path) then
        local content = Infrast.DecodeFromBytes(LuaExt.FileReadBytes(path))
        LuaExt.FileWriteText(path .. ".txt", require("cjson").encode(content))
    end
]]
local PersistentData = {}
local Storage = require("Tools/Storage")

--获取存储数据值，如果没有返回defaultValue
local function Get(self, key, defaultValue)
    return Storage.GetValue(self.storageHandle, key, defaultValue)
end

--设置存储数据值
local function Set(self, key, value, isImmediatelySave)
    return Storage.SetValue(self.storageHandle, key, value, isImmediatelySave)
end

--删除存储数据值
local function Remove(self, key, isImmediatelySave)
    return Storage.RemoveValue(self.storageHandle, key, isImmediatelySave)
end

--删除存储数据值，不要调用
local function RemoveAll(self)
    return Storage.RemoveAllValue(self.storageHandle)
end

--保存数据到文件
local function Save(self)
    Storage.Save(self.storageHandle)
end

--初始化数据
local function InitStorageData(storageKey)
    return {
        storageHandle = Storage.OpenOrCreate(storageKey),
        Get = Get,
        Set = Set,
        Remove = Remove,
        RemoveAll = RemoveAll,
        Save = Save,
    }
end

--初始化设备本地数据，存储设备有关的数据，比如lod，推送通知等
PersistentData.DeviceData = InitStorageData("DeviceData")
--初始化玩家本地数据，登录后才可以使用
PersistentData.PlayerData = nil

--更新玩家的accid的接口
function PersistentData.SetPlayerAccid(currAccid)
    if currAccid then
        local playerDataIndex = PersistentData.DeviceData:Get("LocalPlayerDataIndex", {})
        local dataIndex = playerDataIndex[currAccid]
        if dataIndex then
            --加载存储过的玩家数据
            PersistentData.PlayerData = InitStorageData("PlayerData"..dataIndex)
            PersistentData.DeviceData:Set("lastLoginAccid", currAccid, true)
        else
            --新建玩家数据存储
            local dataIndex = 0
            for k, v in pairs(playerDataIndex) do
                dataIndex = math.max(dataIndex, v)
            end
            dataIndex = dataIndex + 1
            PersistentData.PlayerData = InitStorageData("PlayerData"..dataIndex)
            PersistentData.PlayerData:Set("accid", currAccid, true)
            
            playerDataIndex[currAccid] = dataIndex
            PersistentData.DeviceData:Set("lastLoginAccid", currAccid)
            PersistentData.DeviceData:Set("LocalPlayerDataIndex", playerDataIndex, true)
        end

    end
    
end

--尝试进行数据迁移，待版本上线一段时间后可以移除
if LuaExt.FileExists("Storage/PlayerData") then
    local playerData = InitStorageData("PlayerData")
    local savedAccid = playerData:Get("accid")

    if savedAccid then
        local playerDataIndex = PersistentData.DeviceData:Get("LocalPlayerDataIndex", {})
        if playerDataIndex[savedAccid] then
            --跳过已经存储的重名数据
        else
            --新建玩家数据存储
            local dataIndex = 0
            for k, v in pairs(playerDataIndex) do
                dataIndex = math.max(dataIndex, v)
            end
            dataIndex = dataIndex + 1

            --注册并迁移到新的命名
            playerDataIndex[savedAccid] = dataIndex
            PersistentData.DeviceData:Set("LocalPlayerDataIndex", playerDataIndex, true)
            local bytes = LuaExt.FileReadBytes("Storage/PlayerData")
            LuaExt.FileWriteBytes("Storage/PlayerData"..dataIndex, false, bytes)
        end
    end
    --淘汰旧的文件
    LuaExt.FileDelete("Storage/PlayerData")
end

return PersistentData