import datetime
import random
import time
from datetime import date, timedelta

import requests

from crawler.account import account_record, get_account, release_account
from crawler.login import User
from utils.databases import mongo_table, int2long, object_id
from utils.execptions import ZbYTbCrawlError
from utils.log import logger
from utils.tools import get_host_ip, wait


class Scheduler:

    def __init__(self, site, crawl_type, **kwargs):
        self.site = site
        self.crawl_type = crawl_type
        self.crawl_start = False
        self.count = None  # 日采集数量
        self.total = None  # 日采集上限
        self.account_id = None
        self.record_id = None
        self.user = None
        self.spider_code = None
        self.crawl_url = None
        self.crawl_params = None
        self.crawl_exception = None
        self.kwargs = kwargs

        self.account_tab = mongo_table('py_spider', 'match_account')
        self.record_tab = mongo_table('py_spider', 'match_account_record')
        self.crawl_error_tab = mongo_table('py_spider', 'crawl_error')

        list_attr = dict(
            name='crawl_list',
            lock=dict(crawl_list=True),
            release=dict(crawl_list=False),
        )
        detail_attr = dict(
            name='crawl_detail',
            lock=dict(crawl_detail=True),
            release=dict(crawl_detail=False),
        )
        self._schedule = {'list': list_attr, 'detail': detail_attr}
        self.account = get_account(self.site, self.crawl_type)

    def _init(self):
        self.account_id = self.account['_id']
        account_record(self.account_id, self.crawl_type)  # 保存使用账号，用于容器自启动归还账号
        self.user = User(self.account['account'], self.account['password'])
        logger.info(f'[启用账号]{self.user.username}')
        history = self.account_history_crawl_record()
        self.count = history['count']  # 访问条数

    def crawl_counter(self, number: int):
        """采集计数器"""
        records = self.record_tab.find_one({'_id': self.record_id})
        records['count'] += number
        self.count = records['count']
        self._update_tab(self.record_tab, self.record_id, count=self.count)

    def query_user(self, account: str):
        query = {'account': account}
        item = self.account_tab.find_one(query)
        if item is None:
            return None
        return User(item['account'], item['password'])

    def err_record(self, err: ZbYTbCrawlError):
        rows = {
            'account': self.user.username if self.user is not None else '',
            'spidercode': self.spider_code,
            'url': self.crawl_url,
            'status_code': err.code,
            'reason': err.reason,
            'params': getattr(err, 'title', ''),
            'crawl_time': int2long(int(time.time())),
            'crawl_type': self.crawl_type,
        }
        self.crawl_error_tab.insert_one(rows)

    def _update_tab(self, collection, mid, **update):
        update['update_time'] = self.current_time
        collection.update_one({'_id': mid}, {'$set': update})

    def account_history_crawl_record(self):
        """使用账号采集记录"""
        query = dict(
            account=self.account['account'],
            date=self.today,
            type=self.crawl_type,
            site=self.site
        )
        item = self.record_tab.find_one(query)
        if item is None:
            item = dict(
                site=self.site,
                account=self.account['account'],
                type=self.crawl_type,
                total=self.account.get('total', 0),  # 任务总数默认值:0
                count=0,
                ip=get_host_ip(),
                date=self.today,
                update_time=self.current_time,
            )
            result = self.record_tab.insert_one(item)
            item['_id'] = result.inserted_id
        self.record_id = item['_id']
        return item

    @staticmethod
    def wait_for_next_task(interval=None):
        interval = (interval or random.choice(range(5, 15)))
        wait(interval)

    def finished(self, interval=None):
        logger.info("任务结束")
        # release_account(self.account_id, self.crawl_type)
        wait(interval)

    @property
    def crawl_task(self):
        results = {}
        url = 'http://cc.spdata.jianyu360.com/crawl/zbytb/task/fetch'
        try:
            response = requests.get(url, timeout=10)
            if response.status_code == 200:
                data = response.json()['data']
                if len(data) > 0:
                    results['_id'] = object_id(data['_id'])
                    for key, val in data.items():
                        if key != '_id':
                            results[key] = val
            return results
        except requests.RequestException:
            return results

    @property
    def today(self):
        return datetime.datetime.today().strftime('%Y-%m-%d')

    @property
    def current_time(self):
        return datetime.datetime.today().strftime('%Y-%m-%d %H:%M:%S')

    @property
    def yesterday(self):
        return (date.today() - timedelta(days=1)).strftime("%Y-%m-%d")

    def __enter__(self):
        logger.info('[开启调度]')
        '''获取闲置账号'''
        if self.account is not None:
            self._init()
            self.crawl_start = True
        else:
            logger.warning(f'[{self.site}]暂无闲置账号')
        return self

    def __exit__(self, exc_type, exc_val, exc_tb):
        logger.info('[关闭调度]')
        release_account(self.account_id, self.crawl_type)
        self.crawl_start = False

        if exc_type is not None:
            logger.exception(exc_tb)
            e = ZbYTbCrawlError(
                code=10500,
                reason=str(exc_type),
                title='未知系统错误'
            )
            self.err_record(e)
        return True