import { processShim } from "./process.js";
import {
  registerPopupWindow,
  unregisterPopupWindow,
} from "./electron/remote/window.js";
import { showVaultManager } from "../ui/bootstrap.js";

function installProcess() {
  window.process = processShim;
}

function installBuffer() {
  if (typeof window.Buffer !== "undefined") return;

  window.Buffer = {
    from: function (data, encoding) {
      if (typeof data === "string") {
        return new TextEncoder().encode(data);
      }

      if (data instanceof ArrayBuffer) {
        return new Uint8Array(data);
      }

      return new Uint8Array(data);
    },
    alloc: function (size, fill, encoding) {
      const buf = new Uint8Array(size);

      if (fill !== undefined) {
        buf.fill(typeof fill === "string" ? fill.charCodeAt(0) : fill);
      }

      return buf;
    },
    allocUnsafe: function (size) {
      return new Uint8Array(size);
    },
    concat: function (arrays) {
      const total = arrays.reduce((sum, a) => sum + a.length, 0);
      const result = new Uint8Array(total);
      let offset = 0;

      for (const arr of arrays) {
        result.set(arr, offset);
        offset += arr.length;
      }

      return result;
    },
    isBuffer: function (obj) {
      return obj instanceof Uint8Array;
    },
    byteLength: function (str, encoding) {
      return new TextEncoder().encode(str).length;
    },
    isEncoding: function (encoding) {
      return [
        "utf8",
        "utf-8",
        "ascii",
        "binary",
        "base64",
        "hex",
        "latin1",
      ].includes((encoding || "").toLowerCase());
    },
  };
}

function installWindowClose() {
  window.close = function () {
    console.log("[ignis] window.close() blocked");
    if (!window.__vaultConfig) {
      showVaultManager();
    }
  };
}

function installWindowOpen() {
  window.__popupIframe = null;
  const _originalOpen = window.open;

  window.open = function (url, target, features) {
    if (url === "about:blank" || (features && features.includes("popup"))) {
      console.log("[ignis] intercepted popup:", url, features);

      registerPopupWindow();

      const iframe = document.createElement("iframe");
      iframe.style.cssText =
        "position:fixed;left:-9999px;width:0;height:0;border:none;";

      document.body.appendChild(iframe);
      window.__popupIframe = iframe;

      const iframeWin = iframe.contentWindow;

      iframeWin.require = window.require;
      iframeWin.module = window.module;
      iframeWin.Buffer = window.Buffer;
      iframeWin.process = window.process;
      iframeWin.global = iframeWin;
      iframeWin.globalEnhance = window.globalEnhance;

      iframeWin.close = function () {
        unregisterPopupWindow();
        iframe.remove();
        window.__popupIframe = null;
      };

      return iframeWin;
    }
    return _originalOpen.call(window, url, target, features);
  };
}

function installContextMenuFix() {
  // hacky fix to prevent browser from showing context menu while allowing obsidian context menu
  window.addEventListener(
    "contextmenu",
    (e) => {
      e.preventDefault();
      Object.defineProperty(e, "defaultPrevented", { get: () => false });
    },
    true,
  );
}

export function installGlobals() {
  installProcess();
  installBuffer();
  installWindowClose();
  installWindowOpen();
  installContextMenuFix();
}