'use strict';
/**
 * P1: Crypto / Storage / IDBFactory / atob / btoa mock
 */

const { createNative, nativeClass } = require('./native');
const nodeCrypto = require('crypto');

// ── Crypto ───────────────────────────────────────────────────
const cryptoMock = {
    getRandomValues: createNative('getRandomValues', function (array) {
        return nodeCrypto.randomFillSync(array);
    }),
    randomUUID: createNative('randomUUID', function () {
        return nodeCrypto.randomUUID();
    }),
    subtle: {
        digest:   createNative('digest',   function () { return Promise.resolve(new ArrayBuffer(32)); }),
        encrypt:  createNative('encrypt',  function () { return Promise.resolve(new ArrayBuffer(0)); }),
        decrypt:  createNative('decrypt',  function () { return Promise.resolve(new ArrayBuffer(0)); }),
        sign:     createNative('sign',     function () { return Promise.resolve(new ArrayBuffer(32)); }),
        verify:   createNative('verify',   function () { return Promise.resolve(true); }),
        generateKey: createNative('generateKey', function () { return Promise.resolve({}); }),
        importKey:   createNative('importKey',   function () { return Promise.resolve({}); }),
        exportKey:   createNative('exportKey',   function () { return Promise.resolve({}); }),
    },
};

// ── Storage (localStorage / sessionStorage) ──────────────────
class Storage {
    constructor() { this._store = {}; }
    get length() { return Object.keys(this._store).length; }
    key(i)         { return Object.keys(this._store)[i] || null; }
    getItem(k)     { return Object.prototype.hasOwnProperty.call(this._store, k) ? this._store[k] : null; }
    setItem(k, v)  { this._store[String(k)] = String(v); }
    removeItem(k)  { delete this._store[k]; }
    clear()        { this._store = {}; }
}
nativeClass(Storage);

// ── IDBFactory (indexedDB) ────────────────────────────────────
class IDBFactory {
    open()        { return { result: null, onerror: null, onsuccess: null }; }
    deleteDatabase() { return {}; }
    databases()   { return Promise.resolve([]); }
    cmp()         { return 0; }
}
nativeClass(IDBFactory);

// ── Notification ──────────────────────────────────────────────
class Notification {
    constructor(title, opts) {
        this.title = title;
        this.options = opts || {};
    }
    close() {}
    static get permission() { return 'denied'; }   // P2: denied 或 default
    static requestPermission() { return Promise.resolve('denied'); }
}
nativeClass(Notification);

// ── atob / btoa ───────────────────────────────────────────────
const atob = createNative('atob', (str) => Buffer.from(str, 'base64').toString('binary'));
const btoa = createNative('btoa', (str) => Buffer.from(str, 'binary').toString('base64'));

module.exports = { cryptoMock, Storage, IDBFactory, Notification, atob, btoa };