"""tickets.phone column + Cancelled status support

Revision ID: c4e8f1a2d3b4
Revises: b2f4a6c8e0d2
Create Date: 2026-08-02 00:00:00.000000

Demo-prep batch (Wahab review): one schema change.

* Add ``tickets.phone`` (nullable) so the customer phone collected on the
  new-issue form is actually persisted instead of silently dropped.
"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision: str = 'c4e8f1a2d3b4'
down_revision: Union[str, Sequence[str], None] = 'b2f4a6c8e0d2'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    """Add tickets.phone (nullable)."""
    op.add_column(
        'tickets',
        sa.Column(
            'phone',
            sa.String(length=50),
            nullable=True,
            comment='Customer contact phone (captured on the new-issue form)',
        ),
    )


def downgrade() -> None:
    """Drop tickets.phone."""
    op.drop_column('tickets', 'phone')