#!/usr/bin/env python
# -*- encoding: utf-8 -*-
# vim: set et sw=4 ts=4 sts=4 ff=unix fenc=utf8:
# Author: Binux<i@binux.me>
#         http://binux.me
# Created on 2014-08-09 14:43:13

import time
import datetime
import pytz
import logging
import tornado.log
import tornado.ioloop
from tornado import gen
import json
import pytz

import config
from libs import utils
from libs.fetcher import Fetcher

from libs.funcs import pusher
from libs.funcs import cal
import traceback

logger = logging.getLogger('qiandao.worker')

class MainWorker(object):
    def __init__(self):
        self.running = False

        if config.db_type == 'sqlite3':
            import sqlite3_db as db
        else:
            import db

        class DB(object):
            user = db.UserDB()
            tpl = db.TPLDB()
            task = db.TaskDB()
            tasklog = db.TaskLogDB()
            site = db.SiteDB()
            pubtpl = db.PubTplDB()
        self.db = DB
        self.fetcher = Fetcher()

    def __call__(self):
        # self.running = tornado.ioloop.IOLoop.current().spawn_callback(self.run)
        # if self.running:
        #     success, failed = self.running
        #     if success or failed:
        #         logger.info('%d task done. %d success, %d failed' % (success+failed, success, failed))
        if self.running:
            return
        self.running = self.run()
        def done(future):
            self.running = None
            success, failed = future.result()
            if success or failed:
                logger.info('%d task done. %d success, %d failed' % (success+failed, success, failed))
            return
        self.running.add_done_callback(done)
        
    def ClearLog(self, taskid):
        logDay = int(self.db.site.get(1, fields=('logDay'))['logDay'])
        for log in self.db.tasklog.list(taskid = taskid, fields=('id', 'ctime')):
            if (time.time() - log['ctime']) > (logDay * 24 * 60 * 60):
                self.db.tasklog.delete(log['id'])
      
    @gen.coroutine
    def run(self):
        running = []
        success = 0
        failed = 0
        try:
            for task in self.scan():
                running.append(self.do(task))
                if len(running) > 50:
                    logging.debug('scaned %d task, waiting...', len(running))
                    result = yield running[:10]
                    for each in result:
                        if each:
                            success += 1
                        else:
                            failed += 1
                    running = running[10:]
            logging.debug('scaned %d task, waiting...', len(running))
            result = yield running
            for each in result:
                if each:
                    success += 1
                else:
                    failed += 1
        except Exception as e:
            logging.exception(e)
        return (success, failed)

    scan_fields = ('id', 'tplid', 'userid', 'init_env', 'env', 'session', 'retry_count', 'retry_interval', 'last_success', 'last_failed', 'success_count', 'failed_count', 'last_failed_count', 'next', 'disabled', )
    def scan(self):
        return self.db.task.scan(fields=self.scan_fields)

    @staticmethod
    def failed_count_to_time(last_failed_count, retry_count=8, retry_interval=None, interval=None):
        next = None
        if last_failed_count < retry_count or retry_count == -1:
            if retry_interval:
                next = retry_interval
            else:
                if last_failed_count == 0:
                    next = 10 * 60
                elif last_failed_count == 1:
                    next = 110 * 60
                elif last_failed_count == 2:
                    next = 4 * 60 * 60
                elif last_failed_count == 3:
                    next = 6 * 60 * 60
                elif last_failed_count < retry_count or retry_count == -1:
                    next = 11 * 60 * 60
                else:
                    next = None
        elif retry_count == 0:
            next = None

        if interval is None:
            interval = 24 * 60 * 60
        if next:
            next = min(next, interval / 2)
        return next

    @staticmethod
    def fix_next_time(next, gmt_offset=-8*60):
        date = datetime.datetime.utcfromtimestamp(next)
        local_date = date - datetime.timedelta(minutes=gmt_offset)
        if local_date.hour < 2:
            next += 2 * 60 * 60
        if local_date.hour > 21:
            next -= 3 * 60 * 60
        return next

    @staticmethod
    def is_tommorrow(next, gmt_offset=-8*60):
        date = datetime.datetime.utcfromtimestamp(next)
        now = datetime.datetime.utcnow()
        local_date = date - datetime.timedelta(minutes=gmt_offset)
        local_now = now - datetime.timedelta(minutes=gmt_offset)
        local_tomorrow = local_now + datetime.timedelta(hours=24)

        if local_date.day == local_tomorrow.day and not now.hour > 22:
            return True
        elif local_date.hour > 22:
            return True
        else:
            return False

    async def do(self, task):
        task['note'] = self.db.task.get(task['id'], fields=('note'))['note']
        user = self.db.user.get(task['userid'], fields=('id', 'email', 'email_verified', 'nickname', 'logtime'))
        tpl = self.db.tpl.get(task['tplid'], fields=('id', 'userid', 'sitename', 'siteurl', 'tpl', 'interval', 'last_success'))
        ontime = self.db.task.get(task['id'], fields=('ontime', 'ontimeflg', 'pushsw', 'newontime', 'next'))
        newontime = json.loads(ontime["newontime"])
        pushtool = pusher()
        caltool = cal()
        logtime = json.loads(user['logtime'])
        pushsw = json.loads(ontime['pushsw'])

        if 'ErrTolerateCnt' not in logtime:logtime['ErrTolerateCnt'] = 0 

        if task['disabled']:
            self.db.tasklog.add(task['id'], False, msg='task disabled.')
            self.db.task.mod(task['id'], next=None, disabled=1)
            return False

        if not user:
            self.db.tasklog.add(task['id'], False, msg='no such user, disabled.')
            self.db.task.mod(task['id'], next=None, disabled=1)
            return False

        if not tpl:
            self.db.tasklog.add(task['id'], False, msg='tpl missing, task disabled.')
            self.db.task.mod(task['id'], next=None, disabled=1)
            return False

        if tpl['userid'] and tpl['userid'] != user['id']:
            self.db.tasklog.add(task['id'], False, msg='no permission error, task disabled.')
            self.db.task.mod(task['id'], next=None, disabled=1)
            return False

        start = time.time()
        try:
            fetch_tpl = self.db.user.decrypt(0 if not tpl['userid'] else task['userid'], tpl['tpl'])
            env = dict(
                    variables = self.db.user.decrypt(task['userid'], task['init_env']),
                    session = [],
                    )

            url = utils.parse_url(env['variables'].get('_proxy'))
            if not url:
                new_env = await gen.convert_yielded(self.fetcher.do_fetch(fetch_tpl, env))
            else:
                proxy = {
                    'scheme': url['scheme'],
                    'host': url['host'],
                    'port': url['port'],
                    'username': url['username'],
                    'password': url['password']
                }
                new_env = await gen.convert_yielded(self.fetcher.do_fetch(fetch_tpl, env, [proxy]))

            variables = self.db.user.encrypt(task['userid'], new_env['variables'])
            session = self.db.user.encrypt(task['userid'],
                    new_env['session'].to_json() if hasattr(new_env['session'], 'to_json') else new_env['session'])

            # todo next not mid night
            if (newontime['sw']):
                if ('mode' not in newontime):
                    newontime['mode'] = 'ontime'
                if (newontime['mode'] == 'ontime'):
                    newontime['date'] = (datetime.datetime.now()+datetime.timedelta(days=1)).strftime("%Y-%m-%d")
                next = caltool.calNextTs(newontime)['ts']
            else:
                next = time.time() + max((tpl['interval'] if tpl['interval'] else 24 * 60 * 60), 1*60)
                if tpl['interval'] is None:
                    next = self.fix_next_time(next)

            # success feedback
            self.db.tasklog.add(task['id'], success=True, msg=new_env['variables'].get('__log__'))
            self.db.task.mod(task['id'],
                    last_success=time.time(),
                    last_failed_count=0,
                    success_count=task['success_count']+1,
                    env=variables,
                    session=session,
                    mtime=time.time(),
                    next=next)
            self.db.tpl.incr_success(tpl['id'])

            t = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')
            title = u"签到任务 {0}-{1} 成功".format(tpl['sitename'], task['note'])
            logtemp = new_env['variables'].get('__log__')
            logtemp = u"{0} \\r\\n日志：{1}".format(t, logtemp)
            await pushtool.pusher(user['id'], pushsw, 0x2, title, logtemp)

            logger.info('taskid:%d tplid:%d successed! %.5fs', task['id'], task['tplid'], time.time()-start)
            # delete log
            self.ClearLog(task['id'])
        except Exception as e:
            # failed feedback
            traceback.print_exc()
            next_time_delta = self.failed_count_to_time(task['last_failed_count'], task['retry_count'], task['retry_interval'], tpl['interval'])
                        
            t = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')
            title = u"签到任务 {0}-{1} 失败".format(tpl['sitename'], task['note'])
            content = u"{0} \\r\\n日志：{1}".format(t, str(e))
            disabled = False
            if next_time_delta:
                next = time.time() + next_time_delta
                content = content + u" \\r\\n下次运行时间：{0}".format(time.strftime("%Y-%m-%d %H:%M:%S",time.localtime(next)))
                if (logtime['ErrTolerateCnt'] <= task['last_failed_count']):
                    await pushtool.pusher(user['id'], pushsw, 0x1, title, content)
            else:
                disabled = True
                next = None
                content = u" \\r\\n任务已禁用"
                await pushtool.pusher(user['id'], pushsw, 0x1, title, content)

            self.db.tasklog.add(task['id'], success=False, msg=str(e))
            self.db.task.mod(task['id'],
                    last_failed=time.time(),
                    failed_count=task['failed_count']+1,
                    last_failed_count=task['last_failed_count']+1,
                    disabled = disabled,
                    mtime = time.time(),
                    next=next)
            self.db.tpl.incr_failed(tpl['id'])

            logger.error('taskid:%d tplid:%d failed! %r %.4fs', task['id'], task['tplid'], str(e), time.time()-start)
            return False
        return True

if __name__ == '__main__':
    tornado.log.enable_pretty_logging()
    worker = MainWorker()
    io_loop = tornado.ioloop.IOLoop.instance()
    tornado.ioloop.PeriodicCallback(worker, config.check_task_loop).start()
    worker()
    io_loop.start()