"""Database models."""

import sqlalchemy
import sqlalchemy.orm.decl_api
from sqlalchemy import func
from sqlalchemy.dialects import postgresql
from sqlalchemy.ext.associationproxy import association_proxy
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.ext.orderinglist import ordering_list
from sqlalchemy.orm import relationship
from sqlalchemy.schema import Column, ForeignKey
from sqlalchemy.types import Date, DateTime, Integer, String

from .database import session

Base: sqlalchemy.orm.decl_api.DeclarativeMeta = declarative_base()
Base.query = session.query_property()


class TimeStampedModel(Base):
    """Time stamped model."""

    __abstract__ = True
    created = Column(DateTime, default=func.now())
    modified = Column(DateTime, default=func.now(), onupdate=func.now())


class Conference(TimeStampedModel):
    """Conference."""

    __tablename__ = "conference"
    id = Column(Integer, primary_key=True)
    title = Column(String, nullable=False)
    start = Column(Date)
    end = Column(Date)
    days = Column(Integer)
    timezone = Column(String)
    location = Column(String)
    country = Column(String)
    acronym = Column(String)
    url = Column(String)
    schedule_xml_url = Column(String)
    short_name = Column(String, unique=True)
    venue_id = Column(Integer, ForeignKey("venue.id"))

    people_detail = relationship(
        "ConferencePerson", lazy="dynamic", back_populates="conference"
    )
    people = association_proxy("people_detail", "person")

    events = relationship(
        "Event",
        order_by="Event.event_date",
        back_populates="conference",
        lazy="dynamic",
    )

    venue = relationship("Venue", back_populates="conferences")


class City(TimeStampedModel):
    """City."""

    __tablename__ = "city"
    id = Column(Integer, primary_key=True)
    slug = Column(String, nullable=False, unique=True)
    name = Column(String, nullable=False)
    country_code = Column(String, ForeignKey("country.alpha2"), nullable=False)
    wikidata_qid = Column(String, nullable=False)

    venues = relationship("Venue", back_populates="city")
    country = relationship("Country", back_populates="cities")


class Venue(TimeStampedModel):
    """Venue."""

    __tablename__ = "venue"
    id = Column(Integer, primary_key=True)
    name = Column(String, nullable=False)
    city_id = Column(Integer, ForeignKey("city.id"))
    wikidata_qid = Column(String, nullable=False)

    conferences = relationship("Conference", back_populates="venue")
    city = relationship("City", back_populates="venues")


class Country(TimeStampedModel):
    """Country."""

    __tablename__ = "country"
    alpha2 = Column(String, primary_key=True)
    name = Column(String)
    wikidata_qid = Column(String, nullable=False)

    cities = relationship("City", back_populates="country")


class ConferencePerson(Base):
    __tablename__ = "conference_person"
    conference_id = Column(Integer, ForeignKey("conference.id"), primary_key=True)
    person_id = Column(Integer, ForeignKey("person.id"), primary_key=True)
    named_as = Column(String)
    bio = Column(String)
    slug = Column(String)
    url = Column(String)

    person = relationship("Person", back_populates="conferences_association")
    conference = relationship("Conference", back_populates="people_detail")


class Event(TimeStampedModel):
    """Event."""

    __tablename__ = "event"
    id = Column(Integer, primary_key=True)
    conference_id = Column(Integer, ForeignKey("conference.id"), nullable=False)
    event_date = Column(DateTime)
    # day = Column(Integer)
    guid = Column(String)
    start = Column(String)
    duration = Column(String)
    room = Column(String)
    track = Column(String)
    slug = Column(String)
    title = Column(String, nullable=False)
    abstract = Column(String)
    description = Column(String)
    event_type = Column(String)
    url = Column(String)

    conference = relationship("Conference", back_populates="events")

    people_detail = relationship(
        "EventPerson",
        order_by="EventPerson.position",
        back_populates="event",
        collection_class=ordering_list("position"),
    )
    people = association_proxy(
        "people_detail",
        "person",
        creator=lambda i: EventPerson(person=i[0], named_as=i[1]),
    )


class Person(TimeStampedModel):
    """Person."""

    __tablename__ = "person"
    id = Column(Integer, primary_key=True)
    name = Column(String)
    wikidata_qid = Column(String)
    gender = Column(String)
    wikidata_photo = Column(postgresql.ARRAY(String))

    events_association = relationship(
        "EventPerson",
        back_populates="person",
        lazy="dynamic",
    )
    events = association_proxy("events_association", "event")

    conferences_association = relationship("ConferencePerson", back_populates="person")
    conferences = association_proxy("conference_association", "conference")

    # photos = relationship("PersonPhoto", back_populates="person")

    def events_by_time(self):
        q = (
            session.query(Event)
            .join(EventPerson)
            .filter(EventPerson.person == self)
            .order_by(Event.event_date.desc())
        )

        return q


# class PersonPhoto(TimeStampedModel):
#     """Person photo."""
#
#     __tablename__ = "person_photo"
#     person_id = Column(Integer, ForeignKey("person.id"), primary_key=True)
#     source_filename = Column(String)
#
#     person = relationship("Person", back_populates="photos")


class EventPerson(Base):
    """Event person."""

    __tablename__ = "event_person"
    event_id = Column(Integer, ForeignKey("event.id"), primary_key=True)
    person_id = Column(Integer, ForeignKey("person.id"), primary_key=True)
    position = Column(Integer, nullable=False)

    person = relationship("Person", back_populates="events_association")
    event = relationship("Event", back_populates="people_detail")