"""initial schema

Revision ID: 0001
Revises:
Create Date: 2026-05-09
"""
from typing import Sequence, Union
from alembic import op
import sqlalchemy as sa

revision: str = "0001"
down_revision: Union[str, None] = None
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "libraries",
        sa.Column("id", sa.Integer(), primary_key=True),
        sa.Column("name", sa.String(), nullable=False),
        sa.Column("path", sa.String(), nullable=False, unique=True),
    )
    op.create_table(
        "media_items",
        sa.Column("id", sa.Integer(), primary_key=True),
        sa.Column("library_id", sa.Integer(), sa.ForeignKey("libraries.id", ondelete="CASCADE"), nullable=False),
        sa.Column("rel_path", sa.String(), nullable=False),
        sa.Column("filename", sa.String(), nullable=False),
        sa.Column("file_hash", sa.String()),
        sa.Column("media_type", sa.String(), nullable=False),
        sa.Column("size_bytes", sa.Integer()),
        sa.Column("missing", sa.Boolean(), default=False),
        sa.Column("created_at", sa.DateTime(), default=sa.func.now()),
        sa.Column("updated_at", sa.DateTime(), default=sa.func.now()),
        sa.UniqueConstraint("library_id", "rel_path"),
    )
    op.create_table(
        "tags",
        sa.Column("id", sa.Integer(), primary_key=True),
        sa.Column("name", sa.String(), nullable=False),
        sa.Column("category", sa.String(), nullable=False),
        sa.UniqueConstraint("name", "category"),
    )
    op.create_table(
        "media_item_tags",
        sa.Column("media_item_id", sa.Integer(), sa.ForeignKey("media_items.id", ondelete="CASCADE"), primary_key=True),
        sa.Column("tag_id", sa.Integer(), sa.ForeignKey("tags.id", ondelete="CASCADE"), primary_key=True),
    )


def downgrade() -> None:
    op.drop_table("media_item_tags")
    op.drop_table("tags")
    op.drop_table("media_items")
    op.drop_table("libraries")