local skynet = require "skynet"
local lfsUtil = require "utils.lfsUtil"
local hotfix = require "hotfix.hotfix"

-- 全局对象不允许更新(math/string/table可以更新,因为luaext用到了)
local global_objects = {
    arg,
    assert,
    bit32,
    collectgarbage,
    coroutine,
    debug,
    dofile,
    error,
    getmetatable,
    io,
    ipairs,
    lfs,
    load,
    loadfile,
    loadstring,
    -- math,
    module,
    next,
    os,
    package,
    pairs,
    pcall,
    print,
    rawequal,
    rawget,
    rawlen,
    rawset,
    require,
    select,
    setmetatable,
    -- string,
    -- table,
    tonumber,
    tostring,
    type,
    unpack,
    utf8,
    xpcall,
    skynet
}

local protoPath = skynet.getenv("proto_path")
local pathConfig = skynet.getenv("config_path")

-- 排除文件
local function excludeFile(dir)
    -- 服务文件目录
    if dir:match("service") then
        return true
    end
    -- skynet目录
    if dir:match("skynet") then
        return true
    end
    -- 协议目录
    -- if dir:match("proto") then return true end
    -- 配置文件目录
    if dir:match(pathConfig) then
        return true
    end
    -- core 目录
    -- if dir:match("core") then return true end
    -- hotfix 目录
    if dir:match("hotfix") then
        return true
    end
    -- main 文件
    if dir:match("main") then
        return true
    end

    return false
end

-- 获取逻辑文件路径
local function getLogicDirs()
    local res = {}

    local luaDirs = string.split(package.path, ";")
    for _, value in ipairs(luaDirs) do
        if not excludeFile(value) then
            table.insert(res, string.rtrim(value, "?.lua"))
        end
    end

    return res
end

local function getAllFileMod()
    local res = {}

    local logicDirs = getLogicDirs()

    local fileList = {}
    for _, logicDir in ipairs(logicDirs) do
        local files = lfsUtil:get_path_lua_files(logicDir)
        for _, file in ipairs(files) do
            local dir = string.format("%s%s", logicDir, file)
            if not excludeFile(dir) then
                fileList[dir] = file:gsub("/", ".")
            end
        end
    end

    for dir, file in pairs(fileList) do
        res[file] = lfsUtil:get_file_modification(dir .. ".lua") -- 文件修改时间
    end

    return res
end

local root = {}
local fileTimes = {}

-- 热更新文件
function root.update(changeList)
    local errFiles = {}
    for _, file in ipairs(changeList) do
        skynet.error(string.format("Hot fix %s", file))
        hotfix.hotfix_module(file)
    end
end

-- 获取变更文件
function root.getChanggeFiles()
    local changeList = {}
    local newFileTimes = getAllFileMod()
    for file, time in pairs(newFileTimes) do
        if time ~= fileTimes[file] then
            table.insert(changeList, file)
        end
    end

    fileTimes = newFileTimes
    return changeList
end

-- 初始化
function root.init(needInit)
    -- hotfix.log_debug = function(s) skynet.error(s) end
    if needInit then
        fileTimes = getAllFileMod()

        local t = {}
        for key, value in pairs(fileTimes) do
            table.insert(t, {file = key, time = value})
        end
        table.sort(
            t,
            function(a, b)
                return a.file < b.file
            end
        )
        for index, value in ipairs(t) do
            -- log.print(string.format("%s",value.file ))
        end
    end
    hotfix.add_protect(global_objects)
end

return root