// ── RaidableBases (protocol 14, PLAN_REDESIGNS §11.4) ───────────────────────
//
// nivex's RaidableBases pastes a stocked, guarded building for players to raid.
// Its bases reach this module as five kinds: `raid.started`, `raid.completed`,
// `raid.purchased` and `raid.locked` (public), and `raid.ended` (staff's). A base
// completed is *Warlord*'s count, from the tally's `raidsCompleted` (D202). A
// run's step spawns one (`eventRaidableBases.js`).
//
// **Every name is the plugin's (D386).** Difficulty names and levels, profile
// names and base names arrive as the installed plugin's own strings; nothing
// here lists them, and an operator's own difficulty is shown as written.
//
// ── Who may read what ──────────────────────────────────────────────────────
//
// As a world event is read (`worldEvents.js`, D353, D376, D390): the base, its
// difficulty, whether it is PvP, and its grid are public; the raiders' and a
// buyer's names show only to the operator's presence audience, so with presence
// left at staff a signed-out visitor reads "A Hard raid base was raided at G7";
// Steam ids, the position and a run's key are staff's. How
// many raided it is a count, and names nobody.

const { gridOf } = require('./worldEvents')

const KINDS = Object.freeze(['raid.started', 'raid.completed', 'raid.ended', 'raid.purchased', 'raid.locked'])

const STEAM_ID = /^\d{17}$/

function isKind(kind) {
  return KINDS.includes(kind)
}

/**
 * One `raid.*` frame for one viewer: `{ staff, presence, geometry }`. Passes
 * the envelope, `level`, `difficulty`, `base`, `pvp` and `despawnAt`, adds `grid`; a
 * completion adds `raiderCount`, and `names` (with the lock holder's
 * `ownerName`) for the presence audience; a purchase or a lock adds `name` for
 * the presence audience. Staff also get `x`, `z`, the run's `id`,
 * `runId` and `key`, and every Steam id. Any other frame is returned as is.
 */
function shapeFor(frame, { staff = false, presence = false, geometry = null } = {}) {
  if (!frame || !isKind(frame.kind)) return frame

  const out = {}
  for (const key of ['kind', 'type', 't', 'serverId', 'wipeId']) {
    if (frame[key] !== undefined) out[key] = frame[key]
  }

  const level = Number(frame.level)
  if (Number.isInteger(level)) out.level = level
  if (typeof frame.difficulty === 'string' && frame.difficulty) out.difficulty = frame.difficulty
  if (typeof frame.pvp === 'boolean') out.pvp = frame.pvp
  if (Number.isFinite(Number(frame.despawnAt)) && Number(frame.despawnAt) > 0) out.despawnAt = Number(frame.despawnAt)
  // The base's file name is the operator's, as the difficulty is, and the map shows it too.
  if (typeof frame.base === 'string' && frame.base) out.base = frame.base

  const grid = gridOf(geometry, frame.x, frame.z)
  if (grid) out.grid = grid

  const named = presence || staff

  if (frame.kind === 'raid.completed') {
    const raiders = Array.isArray(frame.raiders) ? frame.raiders.filter((r) => r && typeof r === 'object') : []
    const count = Number(frame.raiderCount)
    out.raiderCount = Number.isInteger(count) && count >= 0 ? count : raiders.length
    if (named) {
      out.names = raiders.map((r) => (typeof r.name === 'string' ? r.name : '')).filter(Boolean)
      if (typeof frame.ownerName === 'string' && frame.ownerName) out.ownerName = frame.ownerName
    }
    if (staff) {
      out.raiders = raiders
        .filter((r) => STEAM_ID.test(String(r.steamId || '')))
        .map((r) => ({ steamId: String(r.steamId), ...(typeof r.name === 'string' ? { name: r.name } : {}) }))
      if (STEAM_ID.test(String(frame.ownerId || ''))) out.ownerId = String(frame.ownerId)
    }
  }

  if (frame.kind === 'raid.purchased' || frame.kind === 'raid.locked') {
    if (named && typeof frame.name === 'string' && frame.name) out.name = frame.name
    if (staff && STEAM_ID.test(String(frame.steamId || ''))) out.steamId = String(frame.steamId)
  }

  if (staff) {
    for (const key of ['x', 'z', 'id', 'runId', 'key', 'radius']) {
      if (frame[key] !== undefined) out[key] = frame[key]
    }
  }

  return out
}

/** A JSON column as an object, or null. */
function parse(value) {
  if (value === null || value === undefined) return null
  if (typeof value !== 'string') return value
  try {
    return JSON.parse(value)
  } catch {
    return null
  }
}

/** One profile as the helper reports it, or null when it is not one. */
function profileOf(p) {
  if (!p || typeof p !== 'object' || typeof p.name !== 'string' || !p.name) return null
  return {
    name: p.name,
    difficulty: typeof p.difficulty === 'string' ? p.difficulty : null,
    level: Number.isInteger(Number(p.level)) ? Number(p.level) : null,
    enabled: p.enabled === true,
    pvp: p.pvp === true,
    bases: Array.isArray(p.bases) ? p.bases.filter((b) => typeof b === 'string' && b) : [],
    seabed: p.seabed === true,
    float: p.float === true,
  }
}

/**
 * A server's last report about RaidableBases and its console, from
 * `servers.db.rbReportFor`: `{ raidableBases, consolePlugins }`, each null
 * where the plugin never said (no state yet, or a plugin before this build).
 * `raidableBases` is `{ loaded, version, premium, spawnCall, copyPaste,
 * difficulties, helper, gridReady, profiles }` — `helper.state` is `missing`,
 * `patched`, `unsupported` or `no-raidablebases`; `profiles` is null without a
 * patched helper, which is the only thing that can read them.
 */
function reportOf(row) {
  const rb = row ? parse(row.raidableBases) : null
  const probe = row ? parse(row.console) : null
  let raidableBases = null

  if (rb && typeof rb === 'object') {
    const helper = rb.helper && typeof rb.helper === 'object' ? rb.helper : {}
    raidableBases = {
      loaded: rb.loaded === true,
      version: typeof rb.version === 'string' ? rb.version : null,
      premium: rb.premium === true,
      spawnCall: rb.spawnCall === true,
      copyPaste: rb.copyPaste && typeof rb.copyPaste === 'object' ? { loaded: rb.copyPaste.loaded === true } : null,
      difficulties: Array.isArray(rb.difficulties)
        ? rb.difficulties
            .filter((d) => d && typeof d.name === 'string' && d.name && Number.isInteger(Number(d.level)))
            .map((d) => ({ name: d.name, level: Number(d.level) }))
        : [],
      helper: {
        state: typeof helper.state === 'string' ? helper.state : 'missing',
        version: typeof helper.version === 'string' ? helper.version : null,
        reason: typeof helper.reason === 'string' ? helper.reason : null,
      },
      gridReady: typeof rb.gridReady === 'boolean' ? rb.gridReady : null,
      profiles: Array.isArray(rb.profiles) ? rb.profiles.map(profileOf).filter(Boolean) : null,
    }
  }

  return {
    raidableBases,
    consolePlugins: probe && typeof probe === 'object' && typeof probe.plugins === 'boolean' ? probe.plugins : null,
  }
}

/** Whether the report says the raids helper is installed and patched. */
function helperPatched(report) {
  const rb = report && report.raidableBases
  return Boolean(rb && rb.loaded && rb.helper && rb.helper.state === 'patched')
}

module.exports = { KINDS, isKind, shapeFor, reportOf, profileOf, helperPatched }