// ── Calling one of Rust's own world events (protocol 14, PLAN_REDESIGNS §14.3.1) ──
//
// `rust.world.call`, "Call a world event": a patrol helicopter, a cargo ship, a
// Chinook, an airdrop, the Travelling Vendor, road Bradleys, the F-15 or a
// satellite crash, now, the way the game's own schedule runs them (D354, D367).
// The plugin runs the schedule's `TriggeredEvent` — no console command — so it
// works the same on Carbon.
//
// **Kept (`reversible: 'none'`).** Nothing a call starts is removed when the run
// ends: a cargo ship or a drop may already hold players or their loot (D354).
// `risk: 'change'` all the same, so an operator switches it on deliberately.
//
// **A position only where the game has a route to one** (stage 1's spike): the
// airdrop's drop point and the patrol helicopter's first destination. The
// Chinook drops only at the map's drop zones, and the one route to a chosen
// zone borrows the Airfield terminal's shared state, so it takes no position
// (D378); the rest go where the game puts them.

const client = require('./sidecarClient')
const { serverFor, transportError, pluginError } = require('./eventLeases')
const { BUDGET_MS, location } = require('./eventWorld')

/** The plugin's ceiling on calls per run (`WorldCallsHardMax`); an operator may set it lower. */
const MAX_CALLS_PER_RUN = 10

/**
 * The events a call may run, mirroring the plugin's list. `max` is how many one
 * step may call at once: the game runs the cargo ship, the vendor and road
 * Bradleys (twelve at a time) one at a time.
 */
const EVENTS = Object.freeze([
  { value: 'patrol_heli', label: 'Patrol helicopter', max: 5, placeable: true },
  { value: 'airdrop', label: 'Airdrop', max: 5, placeable: true },
  { value: 'chinook', label: 'Chinook (drops a locked crate where the game chooses)', max: 5 },
  { value: 'cargo', label: 'Cargo ship', max: 1 },
  { value: 'bradley_road', label: 'Road Bradleys (several at once)', max: 1 },
  { value: 'travelling_vendor', label: 'Travelling Vendor', max: 1 },
  { value: 'satellite', label: 'Satellite crash', max: 5 },
  { value: 'f15', label: 'F-15 flyover (decoration only)', max: 5 },
])

/** The plugin's refusals a second attempt would repeat. */
const PERMANENT = new Set([
  'events-disabled',
  'malformed',
  'bad-event',
  'bad-count',
  'not-placeable',
  'too-many',
  'out-of-range',
  'no-monument',
  'off-map',
])

const BUDGETS = [
  {
    id: 'rust.world.calls',
    label: 'World events called',
    unit: 'events',
    description: "Rust's own world events an event calls — patrol helicopters, cargo ships, airdrops and the rest — each one counted. What a call starts is kept when the run ends.",
  },
]

const OPTION_SOURCES = [
  {
    // The plugin's own list, mirrored, so the form fills with every server off.
    id: 'rust.options.world_events',
    label: 'World events',
    description: "Rust's own world events a step can call. Only the airdrop and the patrol helicopter take a position; the rest go where the game puts them.",
    async resolve() {
      return EVENTS.map((e) => ({ value: e.value, label: e.label }))
    },
  },
]

/** Whether a step gives a position at all: a monument, or x or z. */
function hasPosition(params) {
  const blank = (v) => v === undefined || v === null || v === ''
  return !blank(params.monument) || !blank(params.x) || !blank(params.z)
}

const worldCall = {
  id: 'rust.world.call',
  label: 'Call a world event',
  description:
    "Calls one of Rust's own world events now — a patrol helicopter, an airdrop, a Chinook, the cargo ship, road Bradleys, the Travelling Vendor, a satellite crash or an F-15 flyover — as the game's own schedule would. An airdrop or a patrol helicopter can be sent to a monument or a point; the rest go where the game puts them. What it starts is kept when the run ends.",
  risk: 'change',
  reversible: 'none',
  version: 1,
  budgetMs: BUDGET_MS,
  params: [
    { name: 'event', type: 'string', required: true, example: 'airdrop', source: 'rust.options.world_events',
      description: 'Which world event to call.' },
    { name: 'count', type: 'int', required: false, example: 1,
      description: 'How many at once: 1 to 5, and 1 for the cargo ship, road Bradleys and the vendor. Left blank, 1.' },
    { name: 'server', type: 'string', required: false, example: 'main', source: 'rust.options.servers',
      description: 'Which server. A monument already says; otherwise required.' },
    { name: 'monument', type: 'string', required: false, example: 'main/powerplant_1', source: 'rust.options.monuments',
      description: 'Airdrop and patrol helicopter only: where to send it, by monument. Give this OR x and z, or neither for where the game chooses.' },
    { name: 'offsetX', type: 'float', required: false, example: 0, description: "Metres east of the monument's centre (negative is west)." },
    { name: 'offsetZ', type: 'float', required: false, example: 0, description: "Metres north of the monument's centre (negative is south)." },
    { name: 'x', type: 'float', required: false, example: -604, description: 'Airdrop and patrol helicopter only: world x, instead of a monument.' },
    { name: 'z', type: 'float', required: false, example: -342, description: 'Airdrop and patrol helicopter only: world z, instead of a monument.' },
  ],

  cost: (p) => ({ 'rust.world.calls': Math.max(1, Math.round(Number(p.count) || 1)) }),

  async perform({ runId, idempotencyKey, params, verify }) {
    const event = EVENTS.find((e) => e.value === String(params.event || '').trim())
    if (!event) {
      return { ok: false, retry: false, error: `"${params.event}" is not one of the world events a Rust server calls` }
    }

    const blank = params.count === undefined || params.count === null || params.count === ''
    const count = blank ? 1 : Number(params.count)
    if (!Number.isInteger(count) || count < 1 || count > event.max) {
      return { ok: false, retry: false, error: `call 1 to ${event.max} of the ${event.label.toLowerCase()} at a time, and "${params.count}" is not that` }
    }

    let serverId = String(params.server || '').trim()
    let wire = {}

    if (hasPosition(params)) {
      if (!event.placeable) {
        return { ok: false, retry: false, error: `the ${event.label.toLowerCase()} goes where the game puts it; only an airdrop and a patrol helicopter take a position` }
      }
      const where = location(params)
      if (!where.ok) return { ok: false, retry: false, error: where.error }
      serverId = where.serverId
      // A height means nothing to a call: the drop falls to the ground and the
      // helicopter flies at its own.
      const { y, ...flat } = where.wire
      wire = flat
    } else if (!serverId) {
      return { ok: false, retry: false, error: 'the step does not say which server — pick one' }
    }

    const found = await serverFor(serverId)
    if (!found.ok) return found

    if (verify) return { ok: true }

    const result = await client.worldCall(found.server, {
      runId: String(runId),
      key: idempotencyKey,
      event: event.value,
      count,
      ...wire,
    })

    if (!result.ok) {
      const permanent = result.status === 'not-configured' || result.status === 'no-token'
      return { ok: false, ...(permanent ? { retry: false } : {}), error: transportError(found.server, result, 'world event call') }
    }

    const data = result.data || {}
    if (data.kind !== 'world.called') {
      return {
        ok: false,
        ...(PERMANENT.has(data.reason) ? { retry: false } : {}),
        error: pluginError(data, `${found.server.name || found.server.id} refused the ${event.label.toLowerCase()}`),
      }
    }

    const called = Number(data.called) || 0
    return {
      ok: true,
      detail: {
        event: event.value,
        called,
        ...(called < count ? { note: `the game started ${called} of the ${count} asked for` } : {}),
        ...(data.repeat ? { repeat: true, note: 'answered from the first attempt; nothing new was called' } : {}),
      },
    }
  },
}

const ACTIONS = [worldCall]

module.exports = { EVENTS, MAX_CALLS_PER_RUN, PERMANENT, BUDGETS, ACTIONS, OPTION_SOURCES, hasPosition }