"""Dashboard layout tables

Revision ID: 0005_dashboards
Revises: 0004_app_settings
Create Date: 2026-03-22
"""
from typing import Sequence, Union
from alembic import op
import sqlalchemy as sa

revision: str = "0005_dashboards"
down_revision: Union[str, None] = "0004_app_settings"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "dashboards",
        sa.Column("id", sa.Integer, primary_key=True, autoincrement=True),
        sa.Column("name", sa.String(128), nullable=False),
        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
    )
    op.create_table(
        "dashboard_widgets",
        sa.Column("id", sa.Integer, primary_key=True, autoincrement=True),
        sa.Column("dashboard_id", sa.Integer,
                  sa.ForeignKey("dashboards.id", ondelete="CASCADE"), nullable=False),
        sa.Column("widget_key", sa.String(64), nullable=False),
        sa.Column("position", sa.Integer, nullable=False),
    )
    op.create_index(
        "ix_dashboard_widgets_dashboard_id",
        "dashboard_widgets", ["dashboard_id"],
    )


def downgrade() -> None:
    op.drop_index("ix_dashboard_widgets_dashboard_id", "dashboard_widgets")
    op.drop_table("dashboard_widgets")
    op.drop_table("dashboards")