"""Initiales Schema: Benutzer, Sitzungen, Benutzer-Einstellungen.

Revision ID: 0001
Revises:
Create Date: 2026-08-19
"""
from alembic import op
import sqlalchemy as sa

revision = "0001"
down_revision = None
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.create_table(
        "users",
        sa.Column("id", sa.Integer(), primary_key=True),
        sa.Column("username", sa.String(length=64), nullable=False),
        sa.Column("password_hash", sa.String(length=255), nullable=False),
        sa.Column("role", sa.String(length=32), nullable=False),
        sa.Column("display_name", sa.String(length=120), nullable=True),
        sa.Column("is_active", sa.Boolean(), nullable=False, server_default=sa.text("1")),
        sa.Column(
            "must_change_password",
            sa.Boolean(),
            nullable=False,
            server_default=sa.text("0"),
        ),
        sa.Column("created_at", sa.DateTime(timezone=True), nullable=True),
        sa.UniqueConstraint("username", name="uq_users_username"),
    )

    op.create_table(
        "sessions",
        sa.Column("id", sa.Integer(), primary_key=True),
        sa.Column(
            "user_id",
            sa.Integer(),
            sa.ForeignKey("users.id", ondelete="CASCADE"),
            nullable=False,
        ),
        sa.Column("token_hash", sa.String(length=64), nullable=False),
        sa.Column("created_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column("expires_at", sa.DateTime(timezone=True), nullable=False),
        sa.Column("last_seen_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column("user_agent", sa.String(length=255), nullable=True),
    )
    op.create_index("ix_sessions_user_id", "sessions", ["user_id"])
    op.create_index("ix_sessions_token_hash", "sessions", ["token_hash"], unique=True)

    op.create_table(
        "user_settings",
        sa.Column(
            "user_id",
            sa.Integer(),
            sa.ForeignKey("users.id", ondelete="CASCADE"),
            primary_key=True,
        ),
        sa.Column("key", sa.String(length=64), primary_key=True),
        sa.Column("value", sa.String(length=255), nullable=True),
    )


def downgrade() -> None:
    op.drop_table("user_settings")
    op.drop_index("ix_sessions_token_hash", table_name="sessions")
    op.drop_index("ix_sessions_user_id", table_name="sessions")
    op.drop_table("sessions")
    op.drop_table("users")