"""Dashboard share tokens

Revision ID: 0008_share_tokens
Revises: 0007_dashboard_ownership
Create Date: 2026-03-22
"""
from typing import Sequence, Union
from alembic import op
import sqlalchemy as sa

revision: str = "0008_share_tokens"
down_revision: Union[str, None] = "0007_dashboard_ownership"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "dashboard_share_tokens",
        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("token_hash", sa.String(64), nullable=False, unique=True),
        sa.Column("label", sa.String(128), nullable=False, server_default=""),
        sa.Column("expires_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column("created_by", sa.String(36),
                  sa.ForeignKey("users.id", ondelete="SET NULL"), nullable=True),
        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
    )
    op.create_index(
        "ix_share_tokens_dashboard_id", "dashboard_share_tokens", ["dashboard_id"],
    )
    op.create_index(
        "ix_share_tokens_hash", "dashboard_share_tokens", ["token_hash"],
    )


def downgrade() -> None:
    op.drop_index("ix_share_tokens_hash", "dashboard_share_tokens")
    op.drop_index("ix_share_tokens_dashboard_id", "dashboard_share_tokens")
    op.drop_table("dashboard_share_tokens")