from datetime import datetime
import enum
import hashlib
import os

from formity.extensions import db

from sqlalchemy.ext.hybrid import hybrid_property


class Status(enum.Enum):
    new = 1
    confirmed = 2
    allocated = 3
    fulfilled = 4
    rejected = 5
    spam = 6
    delegated = 7
    intransit = 8
    shippingpending = 9
    pickuppending = 10


class PostalCode(db.Model):
    postalcode = db.Column(db.String, primary_key=True)
    address = db.Column(db.String, nullable=False)
    city = db.Column(db.String, nullable=False)
    voivodeship = db.Column(db.String, nullable=False)
    county = db.Column(db.String, nullable=False)


class FaceshieldRequest(db.Model):
    id = db.Column(db.Integer, primary_key=True)

    entity_info = db.Column(db.String)
    full_name = db.Column(db.String)
    phone_number = db.Column(db.String)
    email = db.Column(db.String)
    extra = db.Column(db.String)

    faceshield_front_required = db.Column(db.Integer, default=0, server_default='0')
    faceshield_model = db.Column(db.String)

    faceshield_full_required = db.Column(db.Integer, default=0, server_default='0')

    created = db.Column(db.DateTime, default=datetime.utcnow, nullable=False)
    updated = db.Column(db.DateTime, default=datetime.utcnow, nullable=False,
                        onupdate=datetime.utcnow)

    ua = db.Column(db.String)
    ip = db.Column(db.String)

    status = db.Column(db.Enum(Status), default=Status.new, server_default='new', nullable=False)
    remarks = db.Column(db.String)

    faceshield_front_delivered = db.Column(db.Integer, default=0, server_default='0')
    faceshield_full_delivered = db.Column(db.Integer, default=0, server_default='0')

    shipping_name = db.Column(db.String)
    shipping_street = db.Column(db.String)
    shipping_postalcode = db.Column(db.String)
    shipping_city = db.Column(db.String)
    shipping_latitude = db.Column(db.Float)
    shipping_longitude = db.Column(db.Float)

    postalcode_info = db.relationship(PostalCode, primaryjoin='remote(PostalCode.postalcode) == foreign(FaceshieldRequest.shipping_postalcode)')

    handling_orga = db.Column(db.String, default='hswaw', server_default='hswaw', nullable=False)

    def __str__(self):
        return '#{} {} ({})'.format(self.id, self.entity_info, self.status.name)


class RequestChange(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    request_id = db.Column(db.Integer, db.ForeignKey(FaceshieldRequest.id))
    request = db.relationship(FaceshieldRequest, backref='changelog')

    user_id = db.Column(db.String, nullable=False)

    state_before = db.Column(db.JSON)
    state_after = db.Column(db.JSON)
    remarks = db.Column(db.String)
    created = db.Column(db.DateTime, default=datetime.utcnow, nullable=False)


class ExternalUser(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    email = db.Column(db.String, nullable=False)
    _password = db.Column('password', db.String, nullable=False)
    remarks = db.Column(db.String)

    def _hash(self, salt, password):
        return hashlib.pbkdf2_hmac('sha256', password.encode(), salt.encode(), 213700).hex()

    @hybrid_property
    def password(self):
        return self._password

    @password.setter
    def password(self, new_pass):
        # hack: do not double hash
        if self._password == new_pass:
            return
        salt = hashlib.sha256(os.urandom(16)).hexdigest()
        self._password = salt + ':' + self._hash(salt, new_pass)

    def check_password(self, password):
        salt, h = self.password.split(':')
        return self._hash(salt, password) == h