exports.up = async function (knex) {
  // Add ownerId column to contacts
  await knex.schema.alterTable('contacts', (table) => {
    table.uuid('ownerId');
    table
      .foreign('ownerId')
      .references('id')
      .inTable('users')
      .onDelete('SET NULL');
    table.index(['ownerId']);
  });

  // Add ownerId field definition metadata for Contact object
  const contactObject = await knex('object_definitions')
    .where('apiName', 'Contact')
    .first();

  if (contactObject) {
    const existingField = await knex('field_definitions')
      .where({
        objectDefinitionId: contactObject.id,
        apiName: 'ownerId',
      })
      .first();

    if (!existingField) {
      await knex('field_definitions').insert({
        id: knex.raw('(UUID())'),
        objectDefinitionId: contactObject.id,
        apiName: 'ownerId',
        label: 'Owner',
        type: 'Reference',
        referenceObject: 'User',
        isSystem: true,
        isCustom: false,
        displayOrder: 4,
        created_at: knex.fn.now(),
        updated_at: knex.fn.now(),
      });
    }
  }
};

exports.down = async function (knex) {
  const contactObject = await knex('object_definitions')
    .where('apiName', 'Contact')
    .first();

  if (contactObject) {
    await knex('field_definitions')
      .where({
        objectDefinitionId: contactObject.id,
        apiName: 'ownerId',
      })
      .delete();
  }

  await knex.schema.alterTable('contacts', (table) => {
    table.dropForeign(['ownerId']);
    table.dropColumn('ownerId');
  });
};