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"""Be able to delete a WMS layer in SQL

Revision ID: 951ff84bd8ec
Revises: 29f2a32859ec
Create Date: 2016-06-22 15:29:24.210097
"""

from alembic import op, context

# revision identifiers, used by Alembic.
revision = '951ff84bd8ec'
down_revision = '29f2a32859ec'
branch_labels = None
depends_on = None


def upgrade():
    schema = context.get_context().config.get_main_option('schema')

    op.drop_constraint(
        'layergroup_treeitem_treeitem_id_fkey', 'layergroup_treeitem', schema=schema,
    )
    op.create_foreign_key(
        'layergroup_treeitem_treeitem_id_fkey',
        'layergroup_treeitem', source_schema=schema, local_cols=['treeitem_id'],
        referent_table='treeitem', referent_schema=schema, remote_cols=['id'],
        ondelete='cascade',
    )

    op.drop_constraint(
        'treegroup_id_fkey', 'treegroup', schema=schema,
    )
    op.create_foreign_key(
        'treegroup_id_fkey',
        'treegroup', source_schema=schema, local_cols=['id'],
        referent_table='treeitem', referent_schema=schema, remote_cols=['id'],
        ondelete='cascade',
    )

    op.drop_constraint(
        'ui_metadata_item_id_fkey', 'ui_metadata', schema=schema,
    )
    op.create_foreign_key(
        'ui_metadata_item_id_fkey',
        'ui_metadata', source_schema=schema, local_cols=['item_id'],
        referent_table='treeitem', referent_schema=schema, remote_cols=['id'],
        ondelete='cascade',
    )

    op.drop_constraint(
        'layer_id_fkey', 'layer', schema=schema,
    )
    op.create_foreign_key(
        'layer_id_fkey',
        'layer', source_schema=schema, local_cols=['id'],
        referent_table='treeitem', referent_schema=schema, remote_cols=['id'],
        ondelete='cascade',
    )

    op.drop_constraint(
        'layergroup_id_fkey', 'layergroup', schema=schema,
    )
    op.create_foreign_key(
        'layergroup_id_fkey',
        'layergroup', source_schema=schema, local_cols=['id'],
        referent_table='treegroup', referent_schema=schema, remote_cols=['id'],
        ondelete='cascade',
    )

    op.drop_constraint(
        'interface_layer_layer_id_fkey', 'interface_layer', schema=schema,
    )
    op.create_foreign_key(
        'interface_layer_layer_id_fkey',
        'interface_layer', source_schema=schema, local_cols=['layer_id'],
        referent_table='layer', referent_schema=schema, remote_cols=['id'],
        ondelete='cascade',
    )

    op.drop_constraint(
        'layer_wms_id_fkey', 'layer_wms', schema=schema,
    )
    op.create_foreign_key(
        'layer_wms_id_fkey',
        'layer_wms', source_schema=schema, local_cols=['id'],
        referent_table='layer', referent_schema=schema, remote_cols=['id'],
        ondelete='cascade',
    )


def downgrade():
    schema = context.get_context().config.get_main_option('schema')

    op.drop_constraint(
        'layergroup_treeitem_treeitem_id_fkey', 'layergroup_treeitem', schema=schema,
    )
    op.create_foreign_key(
        'layergroup_treeitem_treeitem_id_fkey',
        'layergroup_treeitem', source_schema=schema, local_cols=['treeitem_id'],
        referent_table='treeitem', referent_schema=schema, remote_cols=['id'],
    )

    op.drop_constraint(
        'treegroup_id_fkey', 'treegroup', schema=schema,
    )
    op.create_foreign_key(
        'treegroup_id_fkey',
        'treegroup', source_schema=schema, local_cols=['id'],
        referent_table='treeitem', referent_schema=schema, remote_cols=['id'],
    )

    op.drop_constraint(
        'ui_metadata_item_id_fkey', 'ui_metadata', schema=schema,
    )
    op.create_foreign_key(
        'ui_metadata_item_id_fkey',
        'ui_metadata', source_schema=schema, local_cols=['item_id'],
        referent_table='treeitem', referent_schema=schema, remote_cols=['id'],
    )

    op.drop_constraint(
        'layer_id_fkey', 'layer', schema=schema,
    )
    op.create_foreign_key(
        'layer_id_fkey',
        'layer', source_schema=schema, local_cols=['id'],
        referent_table='treeitem', referent_schema=schema, remote_cols=['id'],
    )

    op.drop_constraint(
        'layergroup_id_fkey', 'layergroup', schema=schema,
    )
    op.create_foreign_key(
        'layergroup_id_fkey',
        'layergroup', source_schema=schema, local_cols=['id'],
        referent_table='treegroup', referent_schema=schema, remote_cols=['id'],
    )

    op.drop_constraint(
        'interface_layer_layer_id_fkey', 'interface_layer', schema=schema,
    )
    op.create_foreign_key(
        'interface_layer_layer_id_fkey',
        'interface_layer', source_schema=schema, local_cols=['layer_id'],
        referent_table='layer', referent_schema=schema, remote_cols=['id'],
    )

    op.drop_constraint(
        'layer_wms_id_fkey', 'layer_wms', schema=schema,
    )
    op.create_foreign_key(
        'layer_wms_id_fkey',
        'layer_wms', source_schema=schema, local_cols=['id'],
        referent_table='layer', referent_schema=schema, remote_cols=['id'],
    )
