"""labels + note_labels

Revision ID: 0004
Revises: 0003
Create Date: 2026-07-20
"""
from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects.postgresql import UUID

revision = "0004"
down_revision = "0003"
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.create_table(
        "labels",
        sa.Column("id", UUID(as_uuid=True), primary_key=True),
        sa.Column("owner_id", UUID(as_uuid=True), sa.ForeignKey("users.id", ondelete="CASCADE"), nullable=False),
        sa.Column("name", sa.Text(), nullable=False),
        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()),
        sa.UniqueConstraint("owner_id", "name", name="uq_labels_owner_name"),
    )
    op.create_index("ix_labels_owner", "labels", ["owner_id"])

    op.create_table(
        "note_labels",
        sa.Column("note_id", UUID(as_uuid=True), sa.ForeignKey("notes.id", ondelete="CASCADE"), primary_key=True),
        sa.Column("label_id", UUID(as_uuid=True), sa.ForeignKey("labels.id", ondelete="CASCADE"), primary_key=True),
    )
    op.create_index("ix_note_labels_label", "note_labels", ["label_id"])


def downgrade() -> None:
    op.drop_index("ix_note_labels_label", table_name="note_labels")
    op.drop_table("note_labels")
    op.drop_index("ix_labels_owner", table_name="labels")
    op.drop_table("labels")