// Copyright (c) 2010 The Chromium Authors. All rights reserved.

// Use of this source code is governed by a BSD-style license that can be

// found in the LICENSE file.

package org.chromium.debug.core.model;

import org.chromium.sdk.Breakpoint;

import org.chromium.sdk.JavascriptVm;

import org.chromium.sdk.Script;

/**

 * Id of resources loaded in V8 VM. We only know that they may have name (typically filename or

 * URL) or numerical id instead. This class reflects this.

 * The class also contains several utility methods that probably should be separated in the future.

 */

public class VmResourceId {

  public static VmResourceId forName(String scriptName) {

    return new VmResourceId(scriptName);

  }

  public static VmResourceId forId(long scriptId) {

    return new VmResourceId(Long.valueOf(scriptId));

  }

  public static VmResourceId forScript(Script script) {

    if (script.getName() != null) {

      return forName(script.getName());

    } else {

      return forId(script.getId());

    }

  }

  private final Object value;

  private VmResourceId(Object value) {

    if (value == null) {

      throw new IllegalArgumentException("Null id value"); //$NON-NLS-1$

    }

    this.value = value;

  }

  @Override

  public int hashCode() {

    return value.hashCode();

  }

  @Override

  public boolean equals(Object obj) {

    if (obj instanceof VmResourceId == false) {

      return false;

    }

    VmResourceId other = (VmResourceId) obj;

    return this.value.equals(other.value);

  }

  /**

   * @return parameter for {@link JavascriptVm#setBreakpoint} method.

   */

  public Breakpoint.Type getTypeForBreakpoint() {

    if (value instanceof String) {

      return Breakpoint.Type.SCRIPT_NAME;

    } else {

      return Breakpoint.Type.SCRIPT_ID;

    }

  }

  /**

   * @return parameter for {@link JavascriptVm#setBreakpoint} method.

   */

  public String getTargetForBreakpoint() {

    return value.toString();

  }

  String createFileNameTemplate(boolean isEval) {

    if (value instanceof String) {

      return value.toString();

    } else {

      if (isEval) {

        return "<eval #" + value + ">"; //$NON-NLS-1$ //$NON-NLS-2$

      } else {

        return "<no name #" + value + ">"; //$NON-NLS-1$ //$NON-NLS-2$

      }

    }

  }

  @Override

  public String toString() {

    return getEclipseSourceName();

  }

  /**

   * @return source name that is suitable for Eclipse debug source lookup.

   */

  public String getEclipseSourceName() {

    if (value instanceof String) {

      String stringValue = (String) value;

      if (stringValue.startsWith("#")) {

        // Quote it.

        stringValue = "#" + stringValue;

      }

      return stringValue;

    } else {

      return "#" + value;

    }

  }

  public static VmResourceId parseString(String name) {

    if (name.startsWith("##")) {

      return VmResourceId.forName(name.substring(1));

    } else if (name.startsWith("#")) {

      return VmResourceId.forId(Long.parseLong(name.substring(1)));

    } else {

      return VmResourceId.forName(name);

    }

  }

}