#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import sys
import copy
import time
import _thread
import argparse
import compileall
from Utils import Constant
from Utils.Exception import checkException


def mainArgParse(rawArgs: list) -> argparse.Namespace:
    mainParser = argparse.ArgumentParser(description = 'Start running API server')
    mainParser.add_argument('--log', type = str, default = Constant.LogLevel, help = 'output log level')
    mainParser.add_argument('--dns', type = str, default = Constant.DnsServer, nargs = '+', help = 'specify dns server')
    mainParser.add_argument('--port', type = int, default = Constant.ApiPort, help = 'port for running')
    mainParser.add_argument('--path', type = str, default = Constant.ApiPath, help = 'root path for api server')
    mainParser.add_argument('--token', type = str, default = Constant.ApiToken, help = 'token for api server')
    mainParser.add_argument('--thread', type = int, default = Constant.CheckThread, help = 'number of check thread')
    mainParser.add_argument('-v', '--version', help = 'show version', action = 'store_true')
    return mainParser.parse_args(rawArgs)


def testArgParse(rawArgs: list) -> argparse.Namespace:
    testParser = argparse.ArgumentParser(description = 'Test that each function is working properly')
    testParser.add_argument('PROTOCOL', type = str, help = 'test protocol name')
    testParser.add_argument('-a', '--all', help = 'test extra shadowsocks items', action = 'store_true')
    testParser.add_argument('-6', '--ipv6', help = 'test on ipv6 network', action = 'store_true')
    testParser.add_argument('--debug', help = 'enable debug log level', action = 'store_true')
    testParser.add_argument('--url', type = str, default = 'http://baidu.com', help = 'http request url')
    testParser.add_argument('--cert', type = str, default = '', help = 'specify the certificate id')
    testParser.add_argument('--thread', type = int, default = 16, help = 'thread number in check process')
    testParser.add_argument('--select', type = str, nargs = '+', help = 'select id list for test')
    return testParser.parse_args(rawArgs)


testArgs = None
testMode = False
inputArgs = copy.copy(sys.argv)
if len(inputArgs) >= 0:  # remove first arg (normally file name)
    inputArgs.pop(0)
if len(inputArgs) != 0 and inputArgs[0].lower() == 'test':  # test mode
    inputArgs.pop(0)  # remove `test`
    if len(inputArgs) == 0 or inputArgs[0].startswith('-'):  # no protocol is specified
        inputArgs = ['all'] + inputArgs
    testArgs = testArgParse(inputArgs)
    Constant.LogLevel = 'debug' if testArgs.debug else 'warning'
    testMode = True
else:
    mainArgs = mainArgParse(inputArgs)
    if mainArgs.version:  # output version and exit
        print('ProxyC version %s' % Constant.Version)
        sys.exit(0)
    Constant.LogLevel = mainArgs.log  # overwrite global options
    Constant.DnsServer = mainArgs.dns
    Constant.ApiPort = mainArgs.port
    Constant.ApiPath = mainArgs.path
    Constant.ApiToken = mainArgs.token
    Constant.CheckThread = mainArgs.thread


from Tester import testEntry
from Utils.Check import Check
# from Utils import Api, DnsProxy
from Utils import DnsProxy
from Utils.Logger import logger
from Utils.Manager import Manager
from Utils.Tester import Test, loadBind, loadCert
from concurrent.futures import ThreadPoolExecutor


def pythonCompile(dirRange: str = '/') -> None:  # python optimize compile
    for optimize in [-1, 1, 2]:
        compileall.compile_dir(dirRange, quiet = 1, optimize = optimize)
        logger.warning('Python optimize compile -> %s (level = %i)' % (dirRange, optimize))


def runCheck(taskId: str, taskInfo: dict) -> None:
    success = True
    checkResult = {}
    try:
        checkResult = Check(taskId, taskInfo)  # check by task info
        logger.warning('[%s] Task finish' % taskId)
    except checkException as exp:
        success = False
        logger.error('[%s] Task error -> %s' % (taskId, exp))
    except:
        success = False
        logger.error('[%s] Task error -> Unknown error' % taskId)
    finally:
        if not success:  # got some error in check process
            taskInfo.pop('check')
            checkResult = {
                **taskInfo,
                'success': False,
            }
        Manager.finishTask(taskId, checkResult)  # commit check result


def loop(threadNum: int) -> None:
    logger.warning('Loop check start -> %i threads' % threadNum)
    threadPool = ThreadPoolExecutor(max_workers = threadNum)  # init thread pool
    while True:
        try:
            taskId, taskInfo = Manager.popTask()  # pop a task
            logger.warning('[%s] Load new task' % taskId)
        except:  # no more task
            time.sleep(2)
            continue
        threadPool.submit(runCheck, taskId, taskInfo)  # submit into thread pool


if testMode:  # test mode
    loadBind(serverV6 = testArgs.ipv6, clientV6 = testArgs.ipv6)  # ipv4 / ipv6 (127.0.0.1 / ::1)
    loadCert(certId = testArgs.cert)  # cert config
    logger.critical('TEST ITEM: %s' % testArgs.PROTOCOL)
    logger.critical('SELECT: ' + str(testArgs.select))
    logger.critical('URL: %s' % testArgs.url)
    logger.critical('THREAD NUMBER: %i' % testArgs.thread)
    logger.critical('-' * 32 + ' TEST START ' + '-' * 32)
    if testArgs.PROTOCOL == 'all':  # run all test items
        for item in testEntry:
            if item == ('ss' if testArgs.all else 'ss-all'):  # skip ss / ss-all
                continue
            logger.critical('TEST ITEM -> ' + item)
            Test(testEntry[item], testArgs.thread, testArgs.url, testArgs.select)
    else:  # run single item
        if testArgs.PROTOCOL == 'ss' and testArgs.all:  # test shadowsocks extra items
            testItem = 'ss-all'
        Test(testEntry[testArgs.PROTOCOL], testArgs.thread, testArgs.url, testArgs.select)
    logger.critical('-' * 32 + ' TEST COMPLETE ' + '-' * 32)
    sys.exit(0)  # test complete


logger.warning('ProxyC starts running (%s)' % Constant.Version)
_thread.start_new_thread(pythonCompile, ('/usr',))  # python compile (generate .pyc file)
_thread.start_new_thread(DnsProxy.start, (Constant.DnsServer, 53))  # start dns server
_thread.start_new_thread(loop, (Constant.CheckThread, ))  # start check loop
# Api.startServer()  # start api server