// Copyright 2019-2023 Tauri Programme within The Commons Conservancy
// SPDX-License-Identifier: Apache-2.0
// SPDX-License-Identifier: MIT
/** @ignore */
function uid() {
    return window.crypto.getRandomValues(new Uint32Array(1))[0];
}
/**
 * Transforms a callback function to a string identifier that can be passed to the backend.
 * The backend uses the identifier to `eval()` the callback.
 *
 * @return A unique identifier associated with the callback function.
 *
 * @since 1.0.0
 */
function transformCallback(callback, once = false) {
    const identifier = uid();
    const prop = `_${identifier}`;
    Object.defineProperty(window, prop, {
        value: (result) => {
            if (once) {
                Reflect.deleteProperty(window, prop);
            }
            return callback === null || callback === void 0 ? void 0 : callback(result);
        },
        writable: false,
        configurable: true
    });
    return identifier;
}
/**
 * Sends a message to the backend.
 * @example
 * ```typescript
 * import { invoke } from '@tauri-apps/api/tauri';
 * await invoke('login', { user: 'tauri', password: 'poiwe3h4r5ip3yrhtew9ty' });
 * ```
 *
 * @param cmd The command name.
 * @param args The optional arguments to pass to the command.
 * @return A promise resolving or rejecting to the backend response.
 *
 * @since 1.0.0
 */
async function invoke(cmd, args = {}) {
    return new Promise((resolve, reject) => {
        const callback = transformCallback((e) => {
            resolve(e);
            Reflect.deleteProperty(window, `_${error}`);
        }, true);
        const error = transformCallback((e) => {
            reject(e);
            Reflect.deleteProperty(window, `_${callback}`);
        }, true);
        window.__TAURI_IPC__({
            cmd,
            callback,
            error,
            ...args
        });
    });
}
/**
 * Convert a device file path to an URL that can be loaded by the webview.
 * Note that `asset:` and `https://asset.localhost` must be added to [`tauri.security.csp`](https://tauri.app/v1/api/config/#securityconfig.csp) in `tauri.conf.json`.
 * Example CSP value: `"csp": "default-src 'self'; img-src 'self' asset: https://asset.localhost"` to use the asset protocol on image sources.
 *
 * Additionally, `asset` must be added to [`tauri.allowlist.protocol`](https://tauri.app/v1/api/config/#allowlistconfig.protocol)
 * in `tauri.conf.json` and its access scope must be defined on the `assetScope` array on the same `protocol` object.
 * For example:
 * ```json
 * {
 *   "tauri": {
 *     "allowlist": {
 *       "protocol": {
 *         "asset": true,
 *         "assetScope": ["$APPDATA/assets/*"]
 *       }
 *     }
 *   }
 * }
 * ```
 *
 * @param  filePath The file path.
 * @param  protocol The protocol to use. Defaults to `asset`. You only need to set this when using a custom protocol.
 * @example
 * ```typescript
 * import { appDataDir, join } from '@tauri-apps/api/path';
 * import { convertFileSrc } from '@tauri-apps/api/tauri';
 * const appDataDirPath = await appDataDir();
 * const filePath = await join(appDataDirPath, 'assets/video.mp4');
 * const assetUrl = convertFileSrc(filePath);
 *
 * const video = document.getElementById('my-video');
 * const source = document.createElement('source');
 * source.type = 'video/mp4';
 * source.src = assetUrl;
 * video.appendChild(source);
 * video.load();
 * ```
 *
 * @return the URL that can be used as source on the webview.
 *
 * @since 1.0.0
 */
function convertFileSrc(filePath, protocol = 'asset') {
    return window.__TAURI__.convertFileSrc(filePath, protocol);
}

export { convertFileSrc, invoke, transformCallback };