from datetime import datetime
from . import db


class Session(db.Model):
    __tablename__ = "sessions"

    id = db.Column(db.Integer, primary_key=True)
    code = db.Column(db.String(6), unique=True, nullable=False, index=True)
    status = db.Column(db.String(20), nullable=False, default="waiting")
    current_recipe_index = db.Column(db.Integer, nullable=False, default=0)
    matched_recipe_id = db.Column(db.Integer, db.ForeignKey("recipes.id"), nullable=True)
    created_at = db.Column(db.DateTime, nullable=False, default=datetime.utcnow)

    participants = db.relationship("Participant", backref="session", cascade="all, delete-orphan")
    recipes = db.relationship("Recipe", backref="session", cascade="all, delete-orphan", order_by="Recipe.position")


class Participant(db.Model):
    __tablename__ = "participants"

    id = db.Column(db.Integer, primary_key=True)
    session_id = db.Column(db.Integer, db.ForeignKey("sessions.id"), nullable=False)
    name = db.Column(db.String(80), nullable=False)
    is_host = db.Column(db.Boolean, nullable=False, default=False)
    created_at = db.Column(db.DateTime, nullable=False, default=datetime.utcnow)


class Recipe(db.Model):
    __tablename__ = "recipes"

    id = db.Column(db.Integer, primary_key=True)
    session_id = db.Column(db.Integer, db.ForeignKey("sessions.id"), nullable=False)
    position = db.Column(db.Integer, nullable=False)
    title = db.Column(db.String(255), nullable=False)
    url = db.Column(db.Text, nullable=False)
    image_url = db.Column(db.Text, nullable=True)
    meta = db.Column(db.String(255), nullable=True)


class Vote(db.Model):
    __tablename__ = "votes"

    id = db.Column(db.Integer, primary_key=True)
    session_id = db.Column(db.Integer, db.ForeignKey("sessions.id"), nullable=False)
    participant_id = db.Column(db.Integer, db.ForeignKey("participants.id"), nullable=False)
    recipe_id = db.Column(db.Integer, db.ForeignKey("recipes.id"), nullable=False)
    vote = db.Column(db.String(3), nullable=False)  # yes/no
    created_at = db.Column(db.DateTime, nullable=False, default=datetime.utcnow)

    __table_args__ = (
        db.UniqueConstraint("participant_id", "recipe_id", name="uq_participant_recipe_vote"),
    )