/**
 * Reminder settings and a count on each reminder email.
 * @param {import('knex').Knex} knex
 */
export async function up(knex) {
  await knex.schema.alterTable('email_log', (table) => {
    table.integer('reminder_count').unsigned().nullable();
  });

  const keys = ['reminders_enabled', 'draft_reminder_days', 'survey_reminder_days'];
  const existing = await knex('settings').whereIn('key', keys).pluck('key');
  const rows = [
    { key: 'reminders_enabled', value: JSON.stringify(true) },
    { key: 'draft_reminder_days', value: JSON.stringify(3) },
    { key: 'survey_reminder_days', value: JSON.stringify(5) },
  ].filter((row) => !existing.includes(row.key));

  if (rows.length > 0) {
    await knex('settings').insert(rows);
  }
}

/**
 * @param {import('knex').Knex} knex
 */
export async function down(knex) {
  await knex.schema.alterTable('email_log', (table) => {
    table.dropColumn('reminder_count');
  });
  await knex('settings')
    .whereIn('key', ['reminders_enabled', 'draft_reminder_days', 'survey_reminder_days'])
    .delete();
}