// ── SQL for the visibility settings ───────────────────────────────────────
//
// Two stores for one decision: the fleet default in `rust_settings`, and an
// optional per-server override on `rust_servers`. See `schema.sql` for why each
// lives where it does.

const core = require('../../core')

const SETTINGS = 'rust_settings'
const SERVERS = 'rust_servers'

/** One setting's stored value, or `null` when nobody has ever set it. */
async function getSetting(key) {
  const rows = await core.query(`SELECT value FROM ${SETTINGS} WHERE setting_key = ?`, [key])
  return rows[0] ? rows[0].value : null
}

async function setSetting(key, value, userId = null) {
  await core.query(
    `INSERT INTO ${SETTINGS} (setting_key, value, updated_by, updated_at)
          VALUES (?, ?, ?, CURRENT_TIMESTAMP)
     ON DUPLICATE KEY UPDATE value = VALUES(value), updated_by = VALUES(updated_by),
                             updated_at = CURRENT_TIMESTAMP`,
    [key, value, userId],
  )
}

/** One server's override, `null` for "inherit", or `undefined` when there is no such server. */
async function getServerPresence(serverId) {
  const rows = await core.query(`SELECT presence_audience AS presence FROM ${SERVERS} WHERE id = ?`, [serverId])
  return rows[0] ? rows[0].presence : undefined
}

/** Every configured server with its override, in the operator's own order. */
async function listServerPresence() {
  return core.query(
    `SELECT id, name, enabled, presence_audience AS presence
       FROM ${SERVERS}
      ORDER BY sort_order ASC, id ASC`,
  )
}

/**
 * Sets or clears (`null`) one server's override.
 *
 * Returns nothing, deliberately. `affectedRows` would look like a way to tell
 * "no such server" from success, and it is not one: without `foundRows` an
 * UPDATE writing the value already there reports 0, and whether core's pool sets
 * that flag is core's business. The model checks existence with a read first.
 */
async function setServerPresence(serverId, value) {
  await core.query(`UPDATE ${SERVERS} SET presence_audience = ? WHERE id = ?`, [value, serverId])
}

module.exports = { getSetting, setSetting, getServerPresence, listServerPresence, setServerPresence }