import type { BrainState, Generated, Generation, PetState, View } from "../types.ts";

// `state` is a read-only snapshot of the pet (see engine.ts), replaced after
// every change; Preact subscribes to revisions. Animation frames update `view`
// without rendering the component tree at 60 Hz.
export const store: {
  state: PetState;
  badEgg: { raw: string; why: string; newer: boolean } | null;
  tabOwned: boolean;
  resetting: boolean;
  executionRevision: number;
} = {
  state: undefined as unknown as PetState, // set by boot() before rendering
  badEgg: null,
  tabOwned: false,
  resetting: false,
  executionRevision: 0,
};
export const brain: BrainState = {
  worker: null,
  state: "off",
  busy: false,
  tps: 0,
  prefillMs: 0,
  progress: null,
  threads: 0,
  id: null,
  error: "",
};
export const upgrade: {
  state: "idle" | "downloading" | "swapping" | "error";
  loaded: number;
  error: string;
} = { state: "idle", loaded: 0, error: "" };
export const view: View = {
  x: 48,
  facing: 1,
  walking: false,
  target: 48,
  anim: null,
  queue: [],
  effects: [],
  want: null,
  wantUntil: 0,
  dream: null,
  dreamUntil: 0,
  game: null,
  thinking: false,
};
export const ui = {
  live: null as { text: string } | null,
  diaryWriting: false,
  diaryDraft: "dear diary,",
  upgradeOpen: false,
  storage: "",
  alertsNote: "",
  toasts: [] as { id: number; text: string; icon?: string }[],
  debugLog: [] as (Generated & { at: Date; mode: Generation["mode"] })[],
  hostingBusy: false,
  remoteError: "",
  remoteEndpoint: "",
  remoteLastSync: 0,
  remoteGameId: null as string | null,
  remoteWeather: "",
};
let revision = 0;
const listeners = new Set<() => void>();
export const snapshot = () => revision;
export function subscribe(listener: () => void) {
  listeners.add(listener);
  return () => {
    listeners.delete(listener);
  };
}
export function emit() {
  revision++;
  for (const listener of listeners) listener();
}
let toastId = 0;
export function toast(text: string, icon?: string) {
  const id = ++toastId;
  ui.toasts.push({ id, text, icon });
  emit();
  setTimeout(() => {
    ui.toasts = ui.toasts.filter((t) => t.id !== id);
    emit();
  }, 4200);
}
export function liveBubble() {
  const bubble = { text: "" };
  ui.live = bubble;
  emit();
  return {
    update(text: string) {
      if (text && ui.live === bubble) {
        bubble.text = text;
        emit();
      }
    },
    remove() {
      if (ui.live === bubble) {
        ui.live = null;
        emit();
      }
    },
  };
}