"""
Copyright 2024-2026 ChatterMate

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
"""

"""add contact-collection columns (collect_email + handoff_collect_email/name)

Adds:
  - agent_customizations.collect_email (default false)  -> optional pre-chat email gate
  - agents.handoff_collect_email (default true)         -> ask email on human handoff
  - agents.handoff_collect_name (default true)          -> ask name on human handoff

Revision ID: d2e3f4a5b6c7
Revises: c1d2e3f4a5b6
Create Date: 2026-06-29 00:00:00.000000

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision: str = 'd2e3f4a5b6c7'
down_revision: Union[str, None] = 'c1d2e3f4a5b6'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    bind = op.get_bind()
    if bind.dialect.name == "postgresql":
        # IF NOT EXISTS so the migration is safe on a DB where columns were added out-of-band
        op.execute(
            "ALTER TABLE agent_customizations "
            "ADD COLUMN IF NOT EXISTS collect_email boolean NOT NULL DEFAULT false"
        )
        op.execute(
            "ALTER TABLE agents "
            "ADD COLUMN IF NOT EXISTS handoff_collect_email boolean NOT NULL DEFAULT true"
        )
        op.execute(
            "ALTER TABLE agents "
            "ADD COLUMN IF NOT EXISTS handoff_collect_name boolean NOT NULL DEFAULT true"
        )
    else:
        op.add_column('agent_customizations', sa.Column('collect_email', sa.Boolean(), server_default=sa.false(), nullable=False))
        op.add_column('agents', sa.Column('handoff_collect_email', sa.Boolean(), server_default=sa.true(), nullable=False))
        op.add_column('agents', sa.Column('handoff_collect_name', sa.Boolean(), server_default=sa.true(), nullable=False))


def downgrade() -> None:
    op.drop_column('agents', 'handoff_collect_name')
    op.drop_column('agents', 'handoff_collect_email')
    op.drop_column('agent_customizations', 'collect_email')