from datetime import datetime

from sqlalchemy import Column, Integer, String, DateTime, ForeignKey, Table
from sqlalchemy.orm import relationship

from app import db

user_skill_table = Table("user_skill", db.Model.metadata,
                         Column("user_id", Integer, ForeignKey("user.id")),
                         Column("skill_id", Integer, ForeignKey("skill.id")))

user_language_table = Table(
    "user_language", db.Model.metadata,
    Column("user_id", Integer, ForeignKey("user.id")),
    Column("language_id", Integer, ForeignKey("language.id")))


class User(db.Model):
    __tablename__ = "user"

    id = Column(Integer, primary_key=True)
    nickname = Column(String(25), unique=True, nullable=False)
    pronouns = Column(String(25), default="")
    volunteerwork = Column(String(4000), default="")
    freetext = Column(String(4000), default="")
    created = Column(DateTime, nullable=False)
    updated = Column(DateTime, onupdate=datetime.now, nullable=False)

    contacts = relationship("Contact")
    address = relationship("Address", uselist=False, back_populates="user")
    skills = relationship("Skill",
                          secondary=user_skill_table,
                          back_populates="users")
    languages = relationship("Language",
                             secondary=user_language_table,
                             back_populates="users")


class Contact(db.Model):
    __tablename__ = "contact"

    id = Column(Integer, primary_key=True)
    user_id = Column(Integer, ForeignKey("user.id"))
    user = relationship("User", back_populates="contacts")
    contacttype_id = Column(Integer, ForeignKey("contacttype.id"))
    contacttype = relationship("ContactType")
    content = Column(String(200), nullable=False)


class ContactType(db.Model):
    __tablename__ = "contacttype"

    id = Column(Integer, primary_key=True)
    name = Column(String(25), nullable=False)


class Address(db.Model):
    __tablename__ = "address"

    id = Column(Integer, primary_key=True)
    street = Column(String(25), default="")
    house_number = Column(String(10), default="")
    additional = Column(String(25), default="")
    postcode = Column(String(10), default="")
    city = Column(String(25), default="")
    country = Column(String(25), default="")

    user_id = Column(Integer, ForeignKey("user.id"))
    user = relationship("User", back_populates="address")


class Skill(db.Model):
    __tablename__ = "skill"

    id = Column(Integer, primary_key=True)
    name = Column(String(25), unique=True, nullable=False)

    users = relationship("User",
                         secondary=user_skill_table,
                         back_populates="skills")


class Language(db.Model):
    __tablename__ = "language"

    id = Column(Integer, primary_key=True)
    name = Column(String(25), nullable=False)

    users = relationship("User",
                         secondary=user_language_table,
                         back_populates="languages")