local skynet = require "skynet"
local skynet_core = require "skynet.core"

local levels = {"DEBUG", "INFO", "WARN", "ERROR", "FATAL"}

local root = {
    level = 0,
    logger = nil, -- c service logger handle
    date = nil, -- 2015-02-03
    file = "", --日志文件前缀
    filename = "", --当前打开日志文件名
    logger_mode = nil,
    logger_dir = nil
}

function root.get_logger(file)
    local o = {}
    setmetatable(o, root)
    root.__index = root
    o.file = file
    local logger = {}
    local function get_logger(name)
        return function(...)
            local f = o[name]
            f(o, ...)
        end
    end
    logger.debug = get_logger("debug")
    logger.info = get_logger("info")
    logger.warn = get_logger("warn")
    logger.error = get_logger("error")
    logger.fatal = get_logger("fatal")
    logger.raw_log = get_logger("raw_log")

    logger.set_level = function(level)
        o:set_level(level)
    end
    return logger
end

function root:new(file)
    local o = {}
    setmetatable(o, self)
    self.__index = self
    o.file = file
    return o
end

-- 获取日志级别 level is number
function root:get_logger_level()
    local level = self.logger_mode
    for k, v in ipairs(levels) do
        if v == level then
            return k
        end
    end
    return 1
end

function root:open()
    local date = os.date("%Y-%m-%d", skynet_time())
    if not self.logger_mode then
        self.logger_mode = skynet.getenv("logmode") or "DEBUG"
        self.level = self:get_logger_level() -- 设置日志级别
    end

    self.logger_dir = skynet.getenv("logpath")
    local filename = self.logger_dir .. self.file .. "-" .. date .. ".log"
    local logger = skynet.call(".jmlogger", "lua", "open", filename)

    self.filename = filename
    self.logger = logger
end

function root:set_level(level)
    self.level = level
end

function root:log(level, fmt, ...)
    local now = skynet_time()
    local date = os.date("%Y-%m-%d", now)
    if not self.logger then --日志文件还没有打开
        self.date = date
        self:open()
        if self.level > level then
            return
        end
    end
    if os.date("%Y-%m-%d", now) ~= self.date then
        skynet.send(".jmlogger", "lua", "close", self.filename)
        self.date = date
        self:open()
    end
    --加入行号和文件名
    local info = debug.getinfo(4, "nSl")
    local s =
        string.format(
        "[%s] [%s] [::%s] [line:%-4d] " .. fmt,
        os.date("%H:%M:%S", now),
        levels[level],
        info.source,
        info.currentline,
        ...
    )
    if IS_DEBUG then
        print(s)
    end
    skynet_core.send(self.logger, 0, 0, s)

    if level >= 3 then
        s = string.format("[%s] [%s] [" .. self.filename .. "] " .. fmt, os.date("%H:%M:%S", now), levels[level], ...)
        skynet.error(s)
    end
end

-- 原始日志，不设级别，不打印时间,不换自动换行
function root:raw_log(fmt, ...)
    local now = skynet_time()
    local date = os.date("%Y-%m-%d", now)
    if not self.logger then --日志文件还没有打开
        self.date = date
        self:open()
    end
    if os.date("%Y-%m-%d", now) ~= self.date then
        skynet.send(".jmlogger", "lua", "close", self.filename)
        self.date = date
        self:open()
    end
    local s = string.format(fmt, ...)
    skynet_core.send(self.logger, 1, 0, s)
end

function root:debug(...)
    if self.level > 1 then
        return
    end
    self:log(1, ...)
end

function root:info(...)
    if self.level > 2 then
        return
    end
    self:log(2, ...)
end

function root:warn(...)
    if self.level > 3 then
        return
    end
    self:log(3, ...)
end

function root:error(...)
    if self.level > 4 then
        return
    end
    self:log(4, ...)
end

function root:fatal(...)
    self:log(5, ...)
end

return root