'use strict';

function wrapToPromise(value) {
  if (!value || typeof value.then !== "function") {
    return Promise.resolve(value);
  }
  return value;
}
function asyncCall(function_, ...arguments_) {
  try {
    return wrapToPromise(function_(...arguments_));
  } catch (error) {
    return Promise.reject(error);
  }
}
function isPrimitive(value) {
  const type = typeof value;
  return value === null || type !== "object" && type !== "function";
}
function isPureObject(value) {
  const proto = Object.getPrototypeOf(value);
  return !proto || proto.isPrototypeOf(Object);
}
function stringify(value) {
  if (isPrimitive(value)) {
    return String(value);
  }
  if (isPureObject(value) || Array.isArray(value)) {
    return JSON.stringify(value);
  }
  if (typeof value.toJSON === "function") {
    return stringify(value.toJSON());
  }
  throw new Error("[unstorage] Cannot stringify value!");
}
const BASE64_PREFIX = "base64:";
function serializeRaw(value) {
  if (typeof value === "string") {
    return value;
  }
  return BASE64_PREFIX + base64Encode(value);
}
function deserializeRaw(value) {
  if (typeof value !== "string") {
    return value;
  }
  if (!value.startsWith(BASE64_PREFIX)) {
    return value;
  }
  return base64Decode(value.slice(BASE64_PREFIX.length));
}
function base64Decode(input) {
  if (globalThis.Buffer) {
    return Buffer.from(input, "base64");
  }
  return Uint8Array.from(
    globalThis.atob(input),
    (c) => c.codePointAt(0)
  );
}
function base64Encode(input) {
  if (globalThis.Buffer) {
    return Buffer.from(input).toString("base64");
  }
  return globalThis.btoa(String.fromCodePoint(...input));
}

const storageKeyProperties = [
  "has",
  "hasItem",
  "get",
  "getItem",
  "getItemRaw",
  "set",
  "setItem",
  "setItemRaw",
  "del",
  "remove",
  "removeItem",
  "getMeta",
  "setMeta",
  "removeMeta",
  "getKeys",
  "clear",
  "mount",
  "unmount"
];
function prefixStorage(storage, base) {
  base = normalizeBaseKey(base);
  if (!base) {
    return storage;
  }
  const nsStorage = { ...storage };
  for (const property of storageKeyProperties) {
    nsStorage[property] = (key = "", ...args) => (
      // @ts-ignore
      storage[property](base + key, ...args)
    );
  }
  nsStorage.getKeys = (key = "", ...arguments_) => storage.getKeys(base + key, ...arguments_).then((keys) => keys.map((key2) => key2.slice(base.length)));
  nsStorage.getItems = async (items, commonOptions) => {
    const prefixedItems = items.map(
      (item) => typeof item === "string" ? base + item : { ...item, key: base + item.key }
    );
    const results = await storage.getItems(prefixedItems, commonOptions);
    return results.map((entry) => ({
      key: entry.key.slice(base.length),
      value: entry.value
    }));
  };
  nsStorage.setItems = async (items, commonOptions) => {
    const prefixedItems = items.map((item) => ({
      key: base + item.key,
      value: item.value,
      options: item.options
    }));
    return storage.setItems(prefixedItems, commonOptions);
  };
  return nsStorage;
}
function normalizeKey(key) {
  if (!key) {
    return "";
  }
  return key.split("?")[0]?.replace(/[/\\]/g, ":").replace(/:+/g, ":").replace(/^:|:$/g, "") || "";
}
function joinKeys(...keys) {
  return normalizeKey(keys.join(":"));
}
function normalizeBaseKey(base) {
  base = normalizeKey(base);
  return base ? base + ":" : "";
}
function filterKeyByDepth(key, depth) {
  if (depth === void 0) {
    return true;
  }
  let substrCount = 0;
  let index = key.indexOf(":");
  while (index > -1) {
    substrCount++;
    index = key.indexOf(":", index + 1);
  }
  return substrCount <= depth;
}
function filterKeyByBase(key, base) {
  if (base) {
    return key.startsWith(base) && key[key.length - 1] !== "$";
  }
  return key[key.length - 1] !== "$";
}

exports.asyncCall = asyncCall;
exports.deserializeRaw = deserializeRaw;
exports.filterKeyByBase = filterKeyByBase;
exports.filterKeyByDepth = filterKeyByDepth;
exports.joinKeys = joinKeys;
exports.normalizeBaseKey = normalizeBaseKey;
exports.normalizeKey = normalizeKey;
exports.prefixStorage = prefixStorage;
exports.serializeRaw = serializeRaw;
exports.stringify = stringify;