/*
 * Copyright 2000-2009 JetBrains s.r.o.
 *
 * 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
 *
 * http://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.jetbrains.idea.maven.dom;

import com.intellij.lang.documentation.DocumentationProvider;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiManager;

import java.util.List;

public class MavenPluginModelDocumentationProvider implements DocumentationProvider {
  public String getQuickNavigateInfo(PsiElement element, PsiElement originalElement) {
    return getDocForMavenPluginParameter(element, false);
  }

  public List<String> getUrlFor(PsiElement element, PsiElement originalElement) {
    return null;
  }

  public String generateDoc(PsiElement element, PsiElement originalElement) {
    return getDocForMavenPluginParameter(element, true);
  }

  public PsiElement getDocumentationElementForLookupItem(PsiManager psiManager, Object object, PsiElement element) {
    return null;
  }

  public PsiElement getDocumentationElementForLink(PsiManager psiManager, String link, PsiElement context) {
    return null;
  }

  private String getDocForMavenPluginParameter(PsiElement element, boolean html) {
    MavenPluginConfigurationDomExtender.ParameterData p = element.getUserData(MavenPluginConfigurationDomExtender.PLUGIN_PARAMETER_KEY);
    if (p == null) return null;

    String[] ss = html ? new String[]{"<br>", "<b>", "</b>", "<i>", "</i>"}
                       : new String[]{"\n ", "", "", "", ""};

    String text = "";
    if (html) {
      text += "Type: " + ss[1] + p.parameter.getType().getStringValue() + ss[2] + ss[0];
      if (p.defaultValue != null) text += "Default Value: " + ss[1] + p.defaultValue + ss[2] + ss[0];
      if (p.expression != null) text += "Expression: " + ss[1] + p.expression + ss[2] + ss[0];
      if (p.parameter.getRequired().getValue() == Boolean.TRUE) text += ss[1] + "Required" + ss[2] + ss[0];
      text += ss[0];
    }
    text += ss[3] + p.parameter.getDescription().getStringValue() + ss[4];
    return text;
  }
}