"""
Copyright 2024-2026 ReplyPier

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_file_attachments_table

Revision ID: abc123456789
Revises: 0cf34ff05aee
Create Date: 2025-10-30 00:00:00.000000

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects import postgresql

# revision identifiers, used by Alembic.
revision: str = 'abc123456789'
down_revision: Union[str, None] = '0cf34ff05aee'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    # Create file_attachments table
    op.create_table('file_attachments',
        sa.Column('id', sa.Integer(), nullable=False),
        sa.Column('file_url', sa.String(), nullable=False),
        sa.Column('filename', sa.String(), nullable=False),
        sa.Column('content_type', sa.String(), nullable=False),
        sa.Column('file_size', sa.BigInteger(), nullable=False),
        sa.Column('chat_history_id', sa.Integer(), nullable=True),
        sa.Column('organization_id', postgresql.UUID(as_uuid=True), nullable=False),
        sa.Column('uploaded_by_user_id', postgresql.UUID(as_uuid=True), nullable=True),
        sa.Column('uploaded_by_customer_id', postgresql.UUID(as_uuid=True), nullable=True),
        sa.Column('created_at', sa.TIMESTAMP(timezone=True), server_default=sa.text('now()'), nullable=True),
        sa.Column('updated_at', sa.TIMESTAMP(timezone=True), server_default=sa.text('now()'), nullable=True),
        sa.ForeignKeyConstraint(['chat_history_id'], ['chat_history.id'], ondelete='CASCADE'),
        sa.ForeignKeyConstraint(['organization_id'], ['organizations.id'], ondelete='CASCADE'),
        sa.ForeignKeyConstraint(['uploaded_by_user_id'], ['users.id'], ondelete='SET NULL'),
        sa.ForeignKeyConstraint(['uploaded_by_customer_id'], ['customers.id'], ondelete='SET NULL'),
        sa.PrimaryKeyConstraint('id')
    )
    op.create_index(op.f('ix_file_attachments_id'), 'file_attachments', ['id'], unique=False)


def downgrade() -> None:
    # Drop the table and index
    op.drop_index(op.f('ix_file_attachments_id'), table_name='file_attachments')
    op.drop_table('file_attachments')