// ── SQL for chat titles (phase 17) ────────────────────────────────────────
//
// The rules an operator writes, per server, and the two columns on
// `rust_servers` that say how many titles a player shows. The titles themselves
// are never stored — see `schema.sql` and `titles.js`.

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

const RULES = 'rust_title_rules'
const SERVERS = 'rust_servers'

/** One server's rules, in precedence order. */
async function listRules(serverId) {
  return core.query(
    `SELECT id, stat, top_n AS topN, text, color
       FROM ${RULES}
      WHERE server_id = ?
      ORDER BY position ASC, id ASC`,
    [serverId],
  )
}

/** Every server's rules, for the admin list — one read rather than one per server. */
async function listAllRules() {
  return core.query(
    `SELECT server_id AS serverId, stat, top_n AS topN, text, color
       FROM ${RULES}
      ORDER BY server_id ASC, position ASC, id ASC`,
  )
}

async function getMode(serverId) {
  const rows = await core.query(
    `SELECT title_mode AS mode, title_max AS max FROM ${SERVERS} WHERE id = ?`,
    [serverId],
  )
  return rows[0] || null
}

async function listModes() {
  return core.query(`SELECT id AS serverId, title_mode AS mode, title_max AS max FROM ${SERVERS}`)
}

/**
 * Replace one server's rules and mode whole. The form edits a list, so the
 * write is a list — and a rule's position is its place in that list.
 */
async function saveSettings(serverId, { mode, max, rules }) {
  await core.query(`UPDATE ${SERVERS} SET title_mode = ?, title_max = ? WHERE id = ?`, [mode, max, serverId])
  await core.query(`DELETE FROM ${RULES} WHERE server_id = ?`, [serverId])

  if (!rules.length) return

  await core.query(
    `INSERT INTO ${RULES} (server_id, position, stat, top_n, text, color)
          VALUES ${rules.map(() => '(?, ?, ?, ?, ?, ?)').join(',')}`,
    rules.flatMap((r, i) => [serverId, i, r.stat, r.topN, r.text, r.color]),
  )
}

module.exports = { RULES, listRules, listAllRules, getMode, listModes, saveSettings }