// ── What an event marker says (runicnpc stage 8, D302, D303) ──────────────
//
// An NPC's marker says its name and its event; a boss is drawn bigger, and no
// health is shown (D303 — the server does not even send it). A boss placed
// outside any event is in the world layer as `kind: 'boss'` (D302).
//
// The event's title comes from core's public calendar, which publishes each
// run's id for this: a map row holds a run id and nothing else. The calendar
// lists announced events only, so an unannounced event is "an event" here and
// nothing more.
//
// Pure, and free of React, so it is tested in Node.

/** `{ [runId]: title }` from core's public calendar answer. */
export function titlesFrom(calendar) {
  const out = {}
  for (const e of (calendar && calendar.entries) || []) {
    if (e && e.kind === 'run' && e.runId != null && e.title) out[String(e.runId)] = e.title
  }
  return out
}

/** The run ids an answer's events layer names that `titles` does not know yet. */
export function unknownRuns(events, titles) {
  const out = new Set()
  for (const e of events || []) {
    if (e && e.runId != null && !Object.prototype.hasOwnProperty.call(titles || {}, String(e.runId))) out.add(String(e.runId))
  }
  return [...out]
}

/** The tooltip for one events-layer row that is not a zone. */
export function eventTip(row, titles) {
  const event = (titles && row && row.runId != null && titles[String(row.runId)]) || 'an event'
  if (!row || row.kind !== 'npc') return `Event crate · ${event}`
  const who = row.name || 'Event NPC'
  const role = row.boss ? ' (boss)' : row.add ? " (a boss's add)" : ''
  return `${who}${role} · ${event}`
}

/** Whether a row is drawn as a boss: bigger (D303). */
export function isBoss(row) {
  return Boolean(row && (row.boss || row.kind === 'boss'))
}

// ── Dynamic PVP's zones (protocol 14, PLAN_REDESIGNS §14.3.3) ──────────────

/** Dynamic PVP's own events as the map names them; a monument's or an operator's is shown as written. */
export const PVP_NAMES = Object.freeze({
  Helicopter: 'Patrol helicopter',
  Bradley: 'Bradley APC',
  Satellite: 'Satellite crash',
  TimedSupply: 'Airdrop',
  SupplySignal: 'Signalled airdrop',
  CargoShip: 'Cargo ship',
  HackableCrate: 'Locked crate',
  ExcavatorIgnition: 'Giant Excavator',
  GhostShip: 'Ghost ship',
  DeepSeaIsland: 'Deep Sea island',
  IslandCannon: 'Island cannon',
})

/** A Dynamic PVP ring's tooltip: "PvP zone · Patrol helicopter". */
export function pvpTip(z) {
  const name = PVP_NAMES[z.event] || z.event
  return name ? `PvP zone · ${name}` : 'PvP zone'
}