/*
    * Copyright (c) 2002-2026 Gargoyle Software Inc.
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    * https://www.apache.org/licenses/LICENSE-2.0
    *
    * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.htmlunit.javascript.host;
  
  import java.nio.charset.StandardCharsets;
  
  import org.htmlunit.corejs.javascript.ScriptableObject;
  import org.htmlunit.corejs.javascript.typedarrays.NativeArrayBuffer;
  import org.htmlunit.corejs.javascript.typedarrays.NativeUint8Array;
  import org.htmlunit.javascript.HtmlUnitScriptable;
  import org.htmlunit.javascript.JavaScriptEngine;
  import org.htmlunit.javascript.configuration.JsxClass;
  import org.htmlunit.javascript.configuration.JsxConstructor;
  import org.htmlunit.javascript.configuration.JsxFunction;
  import org.htmlunit.javascript.configuration.JsxGetter;
  
  /**
   * JavaScript host object for {@code TextEncoder}.
   *
   * @author Ahmed Ashour
   * @author Ronald Brill
   *
   * @see <a href="https://developer.mozilla.org/en-US/docs/Web/API/TextEncoder">MDN Documentation</a>
   */
  @JsxClass
  public class TextEncoder extends HtmlUnitScriptable {
  
      /**
       * Creates an instance of this object.
       */
      @JsxConstructor
      public void jsConstructor() {
          // nothing to do
      }
  
      /**
       * Returns the encoding used by this encoder, which is always {@code "utf-8"}.
       *
       * @return {@code "utf-8"}
       */
      @JsxGetter
      public String getEncoding() {
          return "utf-8";
      }
  
      /**
       * Encodes the given string as a {@code Uint8Array} using UTF-8 encoding.
       *
       * @param toEncode the string to encode
       * @return a {@code Uint8Array} containing the UTF-8 encoded bytes
       */
      @JsxFunction
      public NativeUint8Array encode(final Object toEncode) {
          if (JavaScriptEngine.isUndefined(toEncode)) {
              final NativeUint8Array result = new NativeUint8Array(0);
              result.setParentScope(getParentScope());
              result.setPrototype(ScriptableObject.getClassPrototype(getParentScope(), result.getClassName()));
              return result;
          }
  
          final String txt;
          if (toEncode == null) {
              txt = "null";
          }
          else {
              txt = JavaScriptEngine.toString(toEncode);
          }
  
          final byte[] bytes = txt.getBytes(StandardCharsets.UTF_8);
  
          final NativeArrayBuffer arrayBuffer = new NativeArrayBuffer(bytes.length);
          System.arraycopy(bytes, 0, arrayBuffer.getBuffer(), 0, bytes.length);
  
          final NativeUint8Array result = new NativeUint8Array(arrayBuffer, 0, bytes.length);
          result.setParentScope(getParentScope());
          result.setPrototype(ScriptableObject.getClassPrototype(getParentScope(), result.getClassName()));
          return result;
      }
  }