local sleep = require 'ffi.sleep'
local ext   = require 'process.ext'

local function listen(self, input, output)
    if input then
        log.info('指定输入文件，路径为：', input)
        fs.create_directories(input:parent_path())
        io.input(io.open(input:string(), 'rb'))
    else
        ext.set_filemode(io.stdin, 'b')
    end
    if output then
        log.info('指定输出文件，路径为：', output)
        fs.create_directories(output:parent_path())
        io.output(io.open(output:string(), 'wb'))
    else
        ext.set_filemode(io.stdout, 'b')
        io.stdout:setvbuf 'no'
    end

    for line in io.input():lines 'L' do
        log.debug('标准输入:\n', line)
    end
end

local mt = {
    definition = require 'service.definition',
    listen     = listen,
}
mt.__index = mt

return function ()
    local session = setmetatable({}, mt)
    return session
end