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/*
 * Copyright 2014 Objectos, Fábrica de Software LTDA.
 *
 * 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 br.com.objectos.way.code;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;

import com.squareup.javapoet.ClassName;

/**
 * @author [email protected] (Marcio Endo)
 */
public class NameInfo {

  private static final NameInfo EMPTY = new NameInfo(Collections. emptyList());

  private final List nameList;

  private NameInfo(List nameList) {
    this.nameList = nameList;
  }

  public static NameInfo of() {
    return EMPTY;
  }

  public static NameInfo of(String name) {
    return name == null || name.equals("") ? EMPTY : new NameInfo(Arrays.asList(name));
  }

  public static NameInfo nameOf(Iterable parts) {
    List list = new ArrayList<>();
    parts.forEach(list::add);
    return new NameInfo(list);
  }

  public NameInfo prefix(String prefix) {
    int size = nameList.size();
    List copyList = new ArrayList<>(size);
    for (int i = 0; i < size; i++) {
      String name = nameList.get(i);
      if (i == size - 1) {
        name = prefix + name;
      }
      copyList.add(name);
    }
    return new NameInfo(copyList);
  }

  public String simpleName() {
    String res = "";

    int size = nameList.size();
    if (size > 0) {
      res = nameList.get(size - 1);
    }

    return Code.stripGenerics(res);
  }

  public NameInfo suffix(String suffix) {
    int size = nameList.size();
    List copyList = new ArrayList<>(size);
    for (int i = 0; i < size; i++) {
      String name = nameList.get(i);
      if (i == size - 1) {
        name = name + suffix;
      }
      copyList.add(name);
    }
    return new NameInfo(copyList);
  }

  @Override
  public String toString() {
    return nameList.stream().collect(Collectors.joining("."));
  }

  @Override
  public final int hashCode() {
    return nameList.hashCode();
  }

  @Override
  public final boolean equals(final Object obj) {
    if (obj == this) {
      return true;
    }
    if (obj instanceof NameInfo) {
      final NameInfo that = (NameInfo) obj;
      return nameList.equals(that.nameList);
    } else {
      return false;
    }
  }

  boolean isQualifiedName() {
    return nameList.size() > 1;
  }

  ClassName toClassName(PackageInfo packageInfo) {
    int size = nameList.size();
    Preconditions.checkArgument(size > 0);

    String packageName = packageInfo.name();
    String first = nameList.get(0);
    String[] rest = nameList.subList(1, size).toArray(new String[] {});

    return ClassName.get(packageName, first, rest);
  }

  NameInfo add(String name) {
    List list = new ArrayList<>(nameList.size() + 1);
    list.addAll(nameList);
    list.add(name);
    return new NameInfo(list);
  }

}