"""Add ImportTask and ImportBatch tables for Celery task queue

Revision ID: c26012001
Revises: b26011901
Create Date: 2026-01-20

"""
from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision = 'c26012001'
down_revision = 'b26011901'
branch_labels = None
depends_on = None


def upgrade():
    # Create import_batch table
    op.create_table(
        'import_batch',
        sa.Column('id', sa.Integer(), nullable=False),
        sa.Column('source_directory', sa.String(length=1024), nullable=False),
        sa.Column('status', sa.String(length=32), nullable=True),
        sa.Column('total_files', sa.Integer(), nullable=True),
        sa.Column('processed_files', sa.Integer(), nullable=True),
        sa.Column('imported_count', sa.Integer(), nullable=True),
        sa.Column('skipped_count', sa.Integer(), nullable=True),
        sa.Column('failed_count', sa.Integer(), nullable=True),
        sa.Column('started_at', sa.DateTime(), nullable=True),
        sa.Column('completed_at', sa.DateTime(), nullable=True),
        sa.PrimaryKeyConstraint('id')
    )
    op.create_index(op.f('ix_import_batch_status'), 'import_batch', ['status'], unique=False)

    # Create import_task table
    op.create_table(
        'import_task',
        sa.Column('id', sa.Integer(), nullable=False),
        sa.Column('source_path', sa.String(length=1024), nullable=False),
        sa.Column('file_hash', sa.String(length=64), nullable=True),
        sa.Column('file_size', sa.BigInteger(), nullable=True),
        sa.Column('task_type', sa.String(length=32), nullable=False),
        sa.Column('status', sa.String(length=32), nullable=False),
        sa.Column('celery_task_id', sa.String(length=64), nullable=True),
        sa.Column('context', sa.JSON(), nullable=True),
        sa.Column('batch_id', sa.Integer(), nullable=True),
        sa.Column('result_image_id', sa.Integer(), nullable=True),
        sa.Column('error_message', sa.Text(), nullable=True),
        sa.Column('retry_count', sa.Integer(), nullable=True),
        sa.Column('created_at', sa.DateTime(), nullable=True),
        sa.Column('started_at', sa.DateTime(), nullable=True),
        sa.Column('completed_at', sa.DateTime(), nullable=True),
        sa.ForeignKeyConstraint(['batch_id'], ['import_batch.id'], ondelete='SET NULL'),
        sa.ForeignKeyConstraint(['result_image_id'], ['image_record.id'], ondelete='SET NULL'),
        sa.PrimaryKeyConstraint('id')
    )
    op.create_index(op.f('ix_import_task_celery_task_id'), 'import_task', ['celery_task_id'], unique=False)
    op.create_index(op.f('ix_import_task_created_at'), 'import_task', ['created_at'], unique=False)
    op.create_index(op.f('ix_import_task_file_hash'), 'import_task', ['file_hash'], unique=False)
    op.create_index(op.f('ix_import_task_source_path'), 'import_task', ['source_path'], unique=False)
    op.create_index(op.f('ix_import_task_status'), 'import_task', ['status'], unique=False)
    op.create_index(op.f('ix_import_task_task_type'), 'import_task', ['task_type'], unique=False)
    op.create_index('ix_import_task_batch_status', 'import_task', ['batch_id', 'status'], unique=False)
    op.create_index('ix_import_task_status_type', 'import_task', ['status', 'task_type'], unique=False)


def downgrade():
    op.drop_index('ix_import_task_status_type', table_name='import_task')
    op.drop_index('ix_import_task_batch_status', table_name='import_task')
    op.drop_index(op.f('ix_import_task_task_type'), table_name='import_task')
    op.drop_index(op.f('ix_import_task_status'), table_name='import_task')
    op.drop_index(op.f('ix_import_task_source_path'), table_name='import_task')
    op.drop_index(op.f('ix_import_task_file_hash'), table_name='import_task')
    op.drop_index(op.f('ix_import_task_created_at'), table_name='import_task')
    op.drop_index(op.f('ix_import_task_celery_task_id'), table_name='import_task')
    op.drop_table('import_task')
    op.drop_index(op.f('ix_import_batch_status'), table_name='import_batch')
    op.drop_table('import_batch')