import { MetadataCache } from "./metadata-cache.js";
import { ContentCache } from "./content-cache.js";
import { transport } from "./transport.js";
import { createFsPromises } from "./promises.js";
import { createFsSync } from "./sync.js";
import { createFsWatch } from "./watch.js";
import { createWatcherClient } from "./watcher-client.js";
import { createFdOps } from "./fd.js";
import { constants } from "./constants.js";
import { registerReadTransform, removeReadTransform } from "./read-transforms.js";

const metadataCache = new MetadataCache();
const contentCache = new ContentCache();

const fsPromises = createFsPromises(metadataCache, contentCache, transport);
const fsSync = createFsSync(metadataCache, contentCache, transport);
const fsWatch = createFsWatch(transport);
const watcherClient = createWatcherClient(metadataCache, contentCache, fsWatch);
const fdOps = createFdOps(metadataCache, contentCache, transport);

export const fsShim = {
  promises: fsPromises,

  existsSync: fsSync.existsSync,
  readFileSync: fsSync.readFileSync,
  writeFileSync: fsSync.writeFileSync,
  unlinkSync: fsSync.unlinkSync,
  accessSync: fsSync.accessSync,
  statSync: fsSync.statSync,
  readdirSync: fsSync.readdirSync,

  open: fdOps.open,
  openSync: fdOps.openSync,
  read: fdOps.read,
  readSync: fdOps.readSync,
  close: fdOps.close,
  closeSync: fdOps.closeSync,
  fstat: fdOps.fstat,
  fstatSync: fdOps.fstatSync,

  watch: fsWatch.watch,
  constants,

  _metadataCache: metadataCache,
  _contentCache: contentCache,
  _watcherClient: watcherClient,
  _registerReadTransform: registerReadTransform,
  _removeReadTransform: removeReadTransform,

  async _init(basePath) {
    const tree = await transport.fetchTree(basePath);
    metadataCache.populate(tree);
    console.log(`[shim:fs] Initialized with ${metadataCache.size} entries`);
  },

  async _refreshSubtree(subPath) {
    const tree = await transport.fetchTree(subPath);
    const prefix = subPath.replace(/\\/g, "/").replace(/^\/+/, "").replace(/\/+$/, "");

    // Tree keys are relative to subPath, so prefix them to make vault-relative
    const prefixed = {};

    prefixed[prefix] = { type: "directory" };

    for (const [key, meta] of Object.entries(tree)) {
      prefixed[prefix + "/" + key] = meta;
    }

    metadataCache.merge(prefixed);
  },
};