/*
 * Copyright (C) 2014 The Android Open Source Project
 *
 * 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 com.android.tools.idea.templates;

import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.diagnostic.Logger;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.xml.sax.Attributes;

import java.util.Locale;

/**
 * Helper code for Template Globals (defined in globals.xml)
 */
public class TypedVariable {
  private static final Logger LOG = Logger.getInstance(TypedVariable.class);

  public enum Type {
    STRING,
    BOOLEAN,
    INTEGER;

    @NotNull
    public static Type get(@Nullable String name) {
      if (name == null) {
        return STRING;
      }
      try {
        return valueOf(name.toUpperCase(Locale.US));
      } catch (IllegalArgumentException e) {
        if (!ApplicationManager.getApplication().isUnitTestMode()) {
          LOG.error("Unexpected global type '" + name + "'");
          LOG.error("Expected one of :");
          for (Type s : Type.values()) {
            LOG.error("  " + s.name().toLowerCase(Locale.US));
          }
        }
      }

      return STRING;
    }
  }

  @Nullable
  public static Object parseGlobal(@NotNull Attributes attributes) {
    String value = attributes.getValue(Template.ATTR_VALUE);
    Type type = Type.get(attributes.getValue(Template.ATTR_TYPE));

    switch (type) {
      case STRING:
        return value;
      case BOOLEAN:
        return Boolean.parseBoolean(value);
      case INTEGER:
        try {
          return Integer.parseInt(value);
        } catch (NumberFormatException e) {
          if (!ApplicationManager.getApplication().isUnitTestMode()) {
            LOG.error("NumberFormatException while evaluating " + value);
          }
          return value;
        }
    }

    return value;
  }
}