"""initial schema

Revision ID: 0001_initial
Revises:
Create Date: 2024-01-01 00:00:00.000000
"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects import postgresql

# revision identifiers, used by Alembic.
revision: str = "0001_initial"
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:
    """Upgrade database schema."""
    # Create ENUM types
    world_visibility = postgresql.ENUM(
        "public", "private", "friends_only", name="world_visibility"
    )
    world_visibility.create(op.get_bind(), checkfirst=True)

    asset_type = postgresql.ENUM(
        "image", "audio", "video", "document", "model_3d", "other", name="asset_type"
    )
    asset_type.create(op.get_bind(), checkfirst=True)

    # Create users table
    op.create_table(
        "users",
        sa.Column("id", sa.Integer(), primary_key=True),
        sa.Column("username", sa.String(length=50), nullable=False),
        sa.Column("email", sa.String(length=120), nullable=False),
        sa.Column("hashed_password", sa.String(length=255), nullable=False),
        sa.Column("is_active", sa.Boolean(), nullable=True),
        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now()),
        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=True),
    )
    op.create_index(op.f("ix_users_email"), "users", ["email"], unique=True)
    op.create_index(op.f("ix_users_id"), "users", ["id"], unique=False)
    op.create_index(op.f("ix_users_username"), "users", ["username"], unique=True)

    # Create sessions table
    op.create_table(
        "sessions",
        sa.Column("id", sa.String(length=36), primary_key=True),
        sa.Column("user_id", sa.Integer(), nullable=False),
        sa.Column("token", sa.String(), nullable=False),
        sa.Column("expires_at", sa.DateTime(timezone=True), nullable=False),
        sa.Column("is_active", sa.Boolean(), nullable=True),
        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now()),
        sa.Column("updated_at", sa.DateTime(timezone=True), server_default=sa.func.now()),
        sa.ForeignKeyConstraint(["user_id"], ["users.id"], ondelete="CASCADE"),
    )
    op.create_index(op.f("ix_sessions_token"), "sessions", ["token"], unique=True)

    # Create worlds table
    op.create_table(
        "worlds",
        sa.Column("id", sa.Integer(), primary_key=True),
        sa.Column("name", sa.String(length=255), nullable=False),
        sa.Column("description", sa.Text(), nullable=True),
        sa.Column("owner_id", sa.Integer(), nullable=False),
        sa.Column(
            "visibility",
            postgresql.ENUM(
                "public", "private", "friends_only", name="world_visibility"
            ),
            nullable=True,
        ),
        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now()),
        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=True),
        sa.ForeignKeyConstraint(["owner_id"], ["users.id"]),
    )
    op.create_index(op.f("ix_worlds_id"), "worlds", ["id"], unique=False)

    # Create assets table
    op.create_table(
        "assets",
        sa.Column("id", sa.Integer(), primary_key=True),
        sa.Column("name", sa.String(length=255), nullable=False),
        sa.Column("description", sa.Text(), nullable=True),
        sa.Column(
            "asset_type",
            postgresql.ENUM(
                "image", "audio", "video", "document", "model_3d", "other",
                name="asset_type",
            ),
            nullable=False,
        ),
        sa.Column("file_path", sa.String(length=512), nullable=False),
        sa.Column("file_size", sa.Integer(), nullable=True),
        sa.Column("mime_type", sa.String(length=128), nullable=True),
        sa.Column("metadata_json", sa.Text(), nullable=True),
        sa.Column("world_id", sa.Integer(), nullable=True),
        sa.Column("owner_id", sa.Integer(), nullable=False),
        sa.Column("is_public", sa.Boolean(), nullable=False),
        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now()),
        sa.Column("updated_at", sa.DateTime(timezone=True), server_default=sa.func.now()),
        sa.ForeignKeyConstraint(["owner_id"], ["users.id"]),
        sa.ForeignKeyConstraint(["world_id"], ["worlds.id"]),
    )
    op.create_index(op.f("ix_assets_id"), "assets", ["id"], unique=False)


def downgrade() -> None:
    """Downgrade database schema."""
    op.drop_index(op.f("ix_assets_id"), table_name="assets")
    op.drop_table("assets")
    op.drop_index(op.f("ix_worlds_id"), table_name="worlds")
    op.drop_table("worlds")
    op.drop_index(op.f("ix_sessions_token"), table_name="sessions")
    op.drop_table("sessions")
    op.drop_index(op.f("ix_users_username"), table_name="users")
    op.drop_index(op.f("ix_users_id"), table_name="users")
    op.drop_index(op.f("ix_users_email"), table_name="users")
    op.drop_table("users")

    # Drop ENUM types
    postgresql.ENUM(name="asset_type").drop(op.get_bind(), checkfirst=True)
    postgresql.ENUM(name="world_visibility").drop(op.get_bind(), checkfirst=True)