from ..extensions import db
from .user import User, Tenant


class Document(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(100), nullable=False)
    tenant_id = db.Column(db.Integer, db.ForeignKey(Tenant.id), nullable=False)
    valid_from = db.Column(db.DateTime, nullable=True)
    valid_to = db.Column(db.DateTime, nullable=True)

    # Versioning Information
    created_at = db.Column(db.DateTime, nullable=False, server_default=db.func.now())
    created_by = db.Column(db.Integer, db.ForeignKey(User.id), nullable=False)
    updated_at = db.Column(db.DateTime, nullable=False, server_default=db.func.now(), onupdate=db.func.now())
    updated_by = db.Column(db.Integer, db.ForeignKey(User.id))


class DocumentLanguage(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    document_id = db.Column(db.Integer, db.ForeignKey(Document.id), nullable=False)
    language = db.Column(db.String(2), nullable=False)

    # Versioning Information
    created_at = db.Column(db.DateTime, nullable=False, server_default=db.func.now())
    created_by = db.Column(db.Integer, db.ForeignKey(User.id), nullable=False)


class DocumentVersion(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    doc_lang_id = db.Column(db.Integer, db.ForeignKey(DocumentLanguage.id), nullable=False)
    url = db.Column(db.String(200), nullable=True)
    embeddings = db.Column(db.PickleType, nullable=True)

    # Versioning Information
    created_at = db.Column(db.DateTime, nullable=False, server_default=db.func.now())
    created_by = db.Column(db.Integer, db.ForeignKey(User.id))