#coding:utf-8
import datetime
from sqlalchemy import Column, Integer, String, DateTime,  Numeric, create_engine, VARCHAR
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
from config import DB_CONFIG

from db.ISqlHelper import ISqlHelper

'''
sql操作的基类
包括ip，端口，types类型(0高匿名，1透明)，protocol(0 http,1 https http),country(国家),area(省市),updatetime(更新时间)
 speed(连接速度)
'''

BaseModel = declarative_base()
class Proxy(BaseModel):
    __tablename__='proxys'
    id = Column(Integer, primary_key=True,autoincrement=True)
    ip = Column(VARCHAR(16), nullable=False)
    port = Column(Integer, nullable=False)
    types = Column(Integer, nullable=False)
    protocol = Column(Integer, nullable=False,default=0)
    country = Column(VARCHAR(100), nullable=False)
    area = Column(VARCHAR(100), nullable=False)
    updatetime = Column(DateTime(),default=datetime.datetime.utcnow)
    speed = Column(Numeric(5,2),nullable=False)
    score = Column(Integer, nullable=False,default=0)


class SqlHelper(ISqlHelper):
    params =  {'ip':Proxy.ip,'port':Proxy.port,'types':Proxy.types,'protocol':Proxy.protocol,'country':Proxy.country,'area':Proxy.area,'score':Proxy.score}
    def __init__(self):
        if 'sqlite' in DB_CONFIG['DB_CONNECT_STRING']:
            connect_args={'check_same_thread':False}
            self.engine = create_engine(DB_CONFIG['DB_CONNECT_STRING'],echo=False,connect_args=connect_args)
        else:
            self.engine = create_engine(DB_CONFIG['DB_CONNECT_STRING'],echo=False)
        DB_Session = sessionmaker(bind=self.engine)
        self.session = DB_Session()

    def init_db(self):
         BaseModel.metadata.create_all(self.engine)
    def drop_db(self):
         BaseModel.metadata.drop_all(self.engine)


    def insert(self,value):
        proxy = Proxy(ip=value['ip'],port=value['port'],types=value['types'],protocol=value['protocol'],country = value['country'],
                       area=value['area'],speed=value['speed'])
        self.session.add(proxy)
        self.session.commit()


    def delete(self, conditions=None):
        if conditions:
            conditon_list = []
            for key in conditions.keys():
                if self.params.get(key,None):
                    conditon_list.append(self.params.get(key)==conditions.get(key))
            conditions = conditon_list
            query = self.session.query(Proxy)
            for condition in conditions:
                query = query.filter(condition)
            deleteNum = query.delete()
            self.session.commit()
        else:
            deleteNum = 0
        return ('deleteNum',deleteNum)


    def update(self, conditions=None,value=None):
        '''
        conditions的格式是个字典。类似self.params
        :param conditions:
        :param value:也是个字典：{'ip':192.168.0.1}
        :return:
        '''
        if conditions and value:
            conditon_list = []
            for key in conditions.keys():
                if self.params.get(key,None):
                    conditon_list.append(self.params.get(key)==conditions.get(key))
            conditions = conditon_list
            query = self.session.query(Proxy)
            for condition in conditions:
                query = query.filter(condition)
            updatevalue = {}
            for key in value.keys():
                if self.params.get(key,None):
                    updatevalue[self.params.get(key,None)]=value.get(key)
            updateNum = query.update(updatevalue)
            self.session.commit()
        else:
            updateNum=0
        return {'updateNum':updateNum}


    def select(self, count=None,conditions=None):
        '''
        conditions的格式是个字典。类似self.params
        :param count:
        :param conditions:
        :return:
        '''
        if conditions:
            conditon_list = []
            for key in conditions.keys():
                if self.params.get(key,None):
                    conditon_list.append(self.params.get(key)==conditions.get(key))
            conditions = conditon_list
        else:
            conditions=[]

        query = self.session.query(Proxy.ip,Proxy.port,Proxy.score)
        if len(conditions)>0 and count:
            for condition in conditions:
                query = query.filter(condition)
            return query.order_by(Proxy.score.desc(),Proxy.speed).limit(count).all()
        elif count:
            return query.order_by(Proxy.score.desc(),Proxy.speed).limit(count).all()
        elif len(conditions)>0:
            for condition in conditions:
                query = query.filter(condition)
            return query.order_by(Proxy.score.desc(),Proxy.speed).all()
        else:
            return query.order_by(Proxy.score.desc(),Proxy.speed).all()



    def close(self):
        pass

if __name__=='__main__':

    sqlhelper = SqlHelper()
    sqlhelper.init_db()
    proxy = {'ip':'192.168.1.1','port':80,'type':0,'protocol':0,'country':u'中国','area':u'广州','speed':11.123}
    sqlhelper.insert(proxy)