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import { CachePolicy, download, join, prepare } from "../deps.ts";import { Webview } from "./webview.ts";
const version = "0.7.3";const policy = Deno.env.get("PLUGIN_URL") === undefined  ? CachePolicy.STORE  : CachePolicy.NONE;let url = Deno.env.get("PLUGIN_URL") ??  `https://github.com/webview/webview_deno/releases/download/${version}/`;
/** * Checks for the existence of `./WebView2Loader.dll` for running on Windows. * * @returns true if it exists, false if it doesn't */async function checkForWebView2Loader(): Promise<boolean> {  return await Deno.stat("./WebView2Loader.dll").then(    () => true,    (e) => e instanceof Deno.errors.NotFound ? false : true,  );}
// make sure we don't preload twicelet preloaded = false;
/** * All active webview instances. This is internally used for automatically * destroying all instances once {@link unload} is called. */export const instances: Webview[] = [];
/** * Loads the `./WebView2Loader.dll` for running on Windows. Removes old version * if it already existed, and only runs once. Should be run on the main thread * so that the `unload` gets hooked in properly, otherwise make sure `unload` * gets called during the `window.onunload` event (after all windows are * closed). * * Does not need to be run on non-windows platforms, but that is subject to change. */export async function preload() {  if (preloaded) return;
  if (Deno.build.os === "windows") {    if (await checkForWebView2Loader()) {      await Deno.remove("./WebView2Loader.dll");    }
    const webview2loader = await download(`${url}WebView2Loader.dll`);    await Deno.copyFile(webview2loader, "./WebView2Loader.dll");
    self.addEventListener("unload", unload);  }
  preloaded = true;}
/** * Unload the library and destroy all webview instances. Should only be run * once all windows are closed. If `preload` was called in the main thread, * this will automatically be called during the `window.onunload` event; * otherwise, you may have to call this manually. */export function unload() {  for (const instance of instances) {    instance.destroy();  }  lib.close();  if (Deno.build.os === "windows") {    Deno.removeSync("./WebView2Loader.dll");  }}
// Automatically run the preload if we're on windows and on the main thread.if (Deno.build.os === "windows") {  if ((self as never)["window"]) {    await preload();  } else if (!await checkForWebView2Loader()) {    throw new Error(      "WebView2Loader.dll does not exist! Make sure to run preload() from the main thread.",    );  }}
// Make sure to load the right dylib for the arch when on darwinif (Deno.build.os === "darwin" && !url.endsWith("dylib")) {  url = join(url, `libwebview.${Deno.build.arch}.dylib`);}
const lib = await prepare(  {    name: "webview",    url,    policy,  },  {    "webview_create": {      parameters: ["i32", "pointer"],      result: "pointer",    },    "webview_destroy": {      parameters: ["pointer"],      result: "void",    },    "webview_run": {      parameters: ["pointer"],      result: "void",    },    "webview_terminate": {      parameters: ["pointer"],      result: "void",    },    // "webview_dispatch": {    //   parameters: ["pointer", { function: { parameters: ["pointer", "pointer"], result: "void" } }, "pointer"],    //   result: "void",    // },    "webview_get_window": {      parameters: ["pointer"],      result: "pointer",    },    "webview_set_title": {      parameters: ["pointer", "pointer"],      result: "void",    },    "webview_set_size": {      parameters: ["pointer", "i32", "i32", "i32"],      result: "void",    },    "webview_navigate": {      parameters: ["pointer", "pointer"],      result: "void",    },    "webview_set_html": {      parameters: ["pointer", "pointer"],      result: "void",    },    "webview_init": {      parameters: ["pointer", "pointer"],      result: "void",    },    "webview_eval": {      parameters: ["pointer", "pointer"],      result: "void",    },    "webview_bind": {      parameters: ["pointer", "pointer", "function", "pointer"],      result: "void",    },    "webview_unbind": {      parameters: ["pointer", "pointer"],      result: "void",    },    "webview_return": {      parameters: ["pointer", "pointer", "i32", "pointer"],      result: "void",    },  } as const,);
export default lib;