"""Create permission_delegations table.

Revision ID: 0057
Revises: 0056
Create Date: 2026-07-29
"""

from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects.postgresql import JSONB, UUID as PGUUID

revision = "0057"
down_revision = "0056"
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.create_table(
        "permission_delegations",
        sa.Column("id", PGUUID(as_uuid=True), primary_key=True, server_default=sa.text("gen_random_uuid()")),
        sa.Column("from_user_id", PGUUID(as_uuid=True), sa.ForeignKey("users.id", ondelete="CASCADE"), nullable=False),
        sa.Column("to_user_id", PGUUID(as_uuid=True), sa.ForeignKey("users.id", ondelete="CASCADE"), nullable=False),
        sa.Column("start_at", sa.DateTime(timezone=True), nullable=False),
        sa.Column("end_at", sa.DateTime(timezone=True), nullable=False),
        sa.Column("scope", JSONB, nullable=True),
        sa.Column("active", sa.Boolean, nullable=False, server_default=sa.text("true")),
        sa.Column("tenant_id", PGUUID(as_uuid=True), nullable=False),
        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.text("now()")),
        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.text("now()")),
        sa.CheckConstraint(
            "end_at > start_at",
            name="ck_pd_end_after_start",
        ),
    )
    op.execute('CREATE INDEX IF NOT EXISTS ix_pd_from_user ON permission_delegations (from_user_id)')
    op.execute('CREATE INDEX IF NOT EXISTS ix_pd_to_user ON permission_delegations (to_user_id)')
    op.execute('CREATE INDEX IF NOT EXISTS ix_pd_tenant ON permission_delegations (tenant_id)')
    op.execute('CREATE INDEX IF NOT EXISTS ix_pd_active ON permission_delegations (active)')


def downgrade() -> None:
    op.drop_index("ix_pd_active", table_name="permission_delegations")
    op.drop_index("ix_pd_tenant", table_name="permission_delegations")
    op.drop_index("ix_pd_to_user", table_name="permission_delegations")
    op.drop_index("ix_pd_from_user", table_name="permission_delegations")
    op.drop_table("permission_delegations")