local skynet = require "skynet"
local debug_swith = skynet.getenv("log_debug")

local user_logger_swith = skynet.getenv("my_logger")
local is_daemon = skynet.getenv("daemon") ~= nil
is_daemon = true
local log = {}

local LOG_LEVEL = 
{
    DEBUG   = 1,
    INFO    = 2, 
    WARN    = 3, 
    ERROR   = 4, 
    FATAL   = 5
}

local OUT_PUT_LEVEL = LOG_LEVEL.DEBUG

local LOG_LEVEL_DESC = {
    [1] = "debug ",
    [2] = " info ",
    [3] = " warn ",
    [4] = " error",
    [5] = " fatal",
}

local send_log_fun = function(level, str)
    skynet.error(str)
end


if user_logger_swith then
    if is_daemon then
        send_log_fun = function(level, str)
            skynet.send(".logger", "lua", "logging", LOG_LEVEL_DESC[level], str)
        end
    else
        send_log_fun = function(level, str)
            print(string.format("[:%08x][%s][%s] %s", skynet.self(), os.date("%H:%M:%S"), LOG_LEVEL_DESC[level], str))
        end
    end
end

local function send_log(level, ...)
    local str = ""
    local argsNum = select("#", ...)
    if argsNum == 1 then
        str = tostring(...)
    elseif argsNum > 1 then
        local t = {...}
        for i=1, #t do
            str = str .. tostring(t[i])
            if i ~= #t then
                str = str .. " "
            end
        end
    end

    if level >= LOG_LEVEL.WARN then
        local info = debug.getinfo(3)
    	if info then
    		local filename = string.match(info.short_src, "[^/.]+.lua")
    		str = string.format("%s   <%s:%d>", str, filename, info.currentline)
        end
    end
    send_log_fun(level, str)
end

function log.separate(path, file, no_change_dir, mode)
    if is_daemon and user_logger_swith then
        skynet.call(".logger", "lua", "separate", path, file, no_change_dir, mode)
    end
end

function log.close()
    if is_daemon and user_logger_swith then
        skynet.call(".logger", "lua", "close")
    end
end

function log.forward(path, file, no_change_dir, mode)
    if is_daemon and user_logger_swith then
        skynet.call(".logger", "lua", "forward", path, file, no_change_dir, mode)
    end
end

function log.debug(...)
    if not debug_swith then
        return 
    end
    send_log(LOG_LEVEL.DEBUG, ...)
end

function log.info(...)
    send_log(LOG_LEVEL.INFO, ...)
end

function log.warning(...)
    send_log(LOG_LEVEL.WARN, ...)
end

function log.error(...)
    send_log(LOG_LEVEL.ERROR, ...)
end

function log.fatal(...)
    send_log(LOG_LEVEL.FATAL, ...)
end

return log