"""
Member:
    only the basic info of a user

    role:
        staff > 6
        admin > 9
        active > 1
        not verified email = 1
        deactive < 1

    reputation:
        reputation means the value of a member, it affects in topic and
        everything

        1. when user's topic is up voted, reputation increase:
            + n1 * log(user.reputation)

        2. when user's topic is down voted, reputation decrease:
            - n2 * log(user.reputation)

"""

import hashlib
from random import choice
from datetime import datetime
from sqlalchemy import Column
from sqlalchemy import Integer, String, DateTime, Text
from tornado.options import options
from july.database import db


class Member(db.Model):
    id = Column(Integer, primary_key=True)
    username = Column(String(100), unique=True, index=True)
    email = Column(String(200), unique=True, nullable=False, index=True)
    password = Column(String(100), nullable=False)
    avatar = Column(String(400))
    website = Column(String(400))

    role = Column(Integer, default=1)
    # 0: registered,  1: username
    reputation = Column(Integer, default=20, index=True)
    token = Column(String(16))
    created = Column(DateTime, default=datetime.utcnow)

    city = Column(String(200))
    edit_username_count = Column(Integer, default=2)
    description = Column(Text)

    def __init__(self, email, **kwargs):
        self.email = email.lower()
        self.token = self.create_token(16)
        for k, v in kwargs.items():
            setattr(self, k, v)

    def get_avatar(self, size=48):
        if self.avatar:
            return self.avatar
        md5email = hashlib.md5(self.email).hexdigest()
        query = "%s?s=%s%s" % (md5email, size, options.gravatar_extra)
        return options.gravatar_base_url + query

    def get_notification(self):
        count = Notification.query.filter_by(readed='n')\
                .filter_by(receiver=self.id).count()
        return count

    def to_json(self):
        data = (
            '{"username":"%s", "avatar":"%s", "website":"%s",'
            '"reputation":%s, "role":%s}'
        ) % (self.username, self.get_avatar(), self.website or "",
             self.reputation, self.role)
        return data

    @staticmethod
    def create_password(raw):
        salt = Member.create_token(8)
        hsh = hashlib.sha1(salt + raw + options.password_secret).hexdigest()
        return "%s$%s" % (salt, hsh)

    @staticmethod
    def create_token(length=16):
        chars = ('0123456789'
                 'abcdefghijklmnopqrstuvwxyz'
                 'ABCDEFGHIJKLMNOPQRSTUVWXYZ')
        salt = ''.join([choice(chars) for i in range(length)])
        return salt

    def check_password(self, raw):
        if '$' not in self.password:
            return False
        salt, hsh = self.password.split('$')
        verify = hashlib.sha1(salt + raw + options.password_secret).hexdigest()
        return verify == hsh

    @property
    def is_staff(self):
        return self.role > 6

    @property
    def is_admin(self):
        return self.role > 9


class Notification(db.Model):
    id = Column(Integer, primary_key=True)
    sender = Column(Integer, nullable=False)
    receiver = Column(Integer, nullable=False, index=True)

    content = Column(String(400))
    refer = Column(String(600))

    type = Column(String(20), default='mention')
    created = Column(DateTime, default=datetime.utcnow)
    readed = Column(String(1), default='n')


class Social(db.Model):
    id = Column(Integer, primary_key=True)
    user_id = Column(Integer, nullable=False, index=True)
    enabled = Column(String(1), default='y')
    service = Column(String(100))  # service name: twitter, douban
    token = Column(Text)