/*
 * Copyright (C) 2008 Google 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
 *
 * 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.google.gson.common;

import java.lang.reflect.Type;
import java.util.Collection;

import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;
import com.google.gson.JsonPrimitive;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;
import com.google.gson.annotations.SerializedName;

/**
 * Types used for testing JSON serialization and deserialization
 *
 * @author Inderjeet Singh
 * @author Joel Leitch
 */
public class TestTypes {
  
  public static class Base {
    public static final String BASE_NAME = Base.class.getSimpleName();
    public static final String BASE_FIELD_KEY = "baseName";
    public static final String SERIALIZER_KEY = "serializerName";
    public String baseName = BASE_NAME;
    public String serializerName;
  }

  public static class Sub extends Base {
    public static final String SUB_NAME = Sub.class.getSimpleName();
    public static final String SUB_FIELD_KEY = "subName";
    public final String subName = SUB_NAME;
  }

  public static class ClassWithBaseField {
    public static final String FIELD_KEY = "base";
    public final Base base;
    public ClassWithBaseField(Base base) {
      this.base = base;
    }
  }

  public static class ClassWithBaseArrayField {
    public static final String FIELD_KEY = "base";
    public final Base[] base;
    public ClassWithBaseArrayField(Base[] base) {
      this.base = base;
    }
  }

  public static class ClassWithBaseCollectionField {
    public static final String FIELD_KEY = "base";
    public final Collection<Base> base;
    public ClassWithBaseCollectionField(Collection<Base> base) {
      this.base = base;
    }
  }

  public static class BaseSerializer implements JsonSerializer<Base> {
    public static final String NAME = BaseSerializer.class.getSimpleName(); 
    @Override
    public JsonElement serialize(Base src, Type typeOfSrc, JsonSerializationContext context) {
      JsonObject obj = new JsonObject();
      obj.addProperty(Base.SERIALIZER_KEY, NAME);
      return obj;
    }
  }
  public static class SubSerializer implements JsonSerializer<Sub> {
    public static final String NAME = SubSerializer.class.getSimpleName(); 
    @Override
    public JsonElement serialize(Sub src, Type typeOfSrc, JsonSerializationContext context) {
      JsonObject obj = new JsonObject();
      obj.addProperty(Base.SERIALIZER_KEY, NAME);
      return obj;
    }    
  }

  public static class StringWrapper {
    public final String someConstantStringInstanceField;

    public StringWrapper(String value) {
      someConstantStringInstanceField = value;
    }
  }

  public static class BagOfPrimitives {
    public static final long DEFAULT_VALUE = 0;
    public long longValue;
    public int intValue;
    public boolean booleanValue;
    public String stringValue;

    public BagOfPrimitives() {
      this(DEFAULT_VALUE, 0, false, "");
    }

    public BagOfPrimitives(long longValue, int intValue, boolean booleanValue, String stringValue) {
      this.longValue = longValue;
      this.intValue = intValue;
      this.booleanValue = booleanValue;
      this.stringValue = stringValue;
    }

    public int getIntValue() {
      return intValue;
    }

    public String getExpectedJson() {
      StringBuilder sb = new StringBuilder();
      sb.append("{");
      sb.append("\"longValue\":").append(longValue).append(",");
      sb.append("\"intValue\":").append(intValue).append(",");
      sb.append("\"booleanValue\":").append(booleanValue).append(",");
      sb.append("\"stringValue\":\"").append(stringValue).append("\"");
      sb.append("}");
      return sb.toString();
    }

    @Override
    public int hashCode() {
      final int prime = 31;
      int result = 1;
      result = prime * result + (booleanValue ? 1231 : 1237);
      result = prime * result + intValue;
      result = prime * result + (int) (longValue ^ (longValue >>> 32));
      result = prime * result + ((stringValue == null) ? 0 : stringValue.hashCode());
      return result;
    }

    @Override
    public boolean equals(Object obj) {
      if (this == obj)
        return true;
      if (obj == null)
        return false;
      if (getClass() != obj.getClass())
        return false;
      BagOfPrimitives other = (BagOfPrimitives) obj;
      if (booleanValue != other.booleanValue)
        return false;
      if (intValue != other.intValue)
        return false;
      if (longValue != other.longValue)
        return false;
      if (stringValue == null) {
        if (other.stringValue != null)
          return false;
      } else if (!stringValue.equals(other.stringValue))
        return false;
      return true;
    }

    @Override
    public String toString() {
      return String.format("(longValue=%d,intValue=%d,booleanValue=%b,stringValue=%s)",
          longValue, intValue, booleanValue, stringValue);
    }
  }

  public static class BagOfPrimitiveWrappers {
    private final Long longValue;
    private final Integer intValue;
    private final Boolean booleanValue;

    public BagOfPrimitiveWrappers(Long longValue, Integer intValue, Boolean booleanValue) {
      this.longValue = longValue;
      this.intValue = intValue;
      this.booleanValue = booleanValue;
    }

    public String getExpectedJson() {
      StringBuilder sb = new StringBuilder();
      sb.append("{");
      sb.append("\"longValue\":").append(longValue).append(",");
      sb.append("\"intValue\":").append(intValue).append(",");
      sb.append("\"booleanValue\":").append(booleanValue);
      sb.append("}");
      return sb.toString();
    }
  }

  public static class PrimitiveArray {
    private final long[] longArray;

    public PrimitiveArray() {
      this(new long[0]);
    }

    public PrimitiveArray(long[] longArray) {
      this.longArray = longArray;
    }

    public String getExpectedJson() {
      StringBuilder sb = new StringBuilder();
      sb.append("{\"longArray\":[");

      boolean first = true;
      for (long l : longArray) {
        if (!first) {
          sb.append(",");
        } else {
          first = false;
        }
        sb.append(l);
      }

      sb.append("]}");
      return sb.toString();
    }
  }

  public static class ClassWithNoFields {
    // Nothing here..
    @Override
    public boolean equals(Object other) {
      return other.getClass() == ClassWithNoFields.class;
    }
  }

  public static class Nested {
    private final BagOfPrimitives primitive1;
    private final BagOfPrimitives primitive2;

    public Nested() {
      this(null, null);
    }

    public Nested(BagOfPrimitives primitive1, BagOfPrimitives primitive2) {
      this.primitive1 = primitive1;
      this.primitive2 = primitive2;
    }

    public String getExpectedJson() {
      StringBuilder sb = new StringBuilder();
      sb.append("{");
      appendFields(sb);
      sb.append("}");
      return sb.toString();
    }

    public void appendFields(StringBuilder sb) {
      if (primitive1 != null) {
        sb.append("\"primitive1\":").append(primitive1.getExpectedJson());
      }
      if (primitive1 != null && primitive2 != null) {
        sb.append(",");
      }
      if (primitive2 != null) {
        sb.append("\"primitive2\":").append(primitive2.getExpectedJson());
      }
    }
  }

  public static class ClassWithTransientFields<T> {
    public transient T transientT; 
    public final transient long transientLongValue;
    private final long[] longValue;

    public ClassWithTransientFields() {
      this(0L);
    }

    public ClassWithTransientFields(long value) {
      longValue = new long[] { value };
      transientLongValue = value + 1;
    }

    public String getExpectedJson() {
      StringBuilder sb = new StringBuilder();
      sb.append("{");
      sb.append("\"longValue\":[").append(longValue[0]).append("]");
      sb.append("}");
      return sb.toString();
    }
  }

  public static class ClassWithCustomTypeConverter {
    private final BagOfPrimitives bag;
    private final int value;

    public ClassWithCustomTypeConverter() {
      this(new BagOfPrimitives(), 10);
    }

    public ClassWithCustomTypeConverter(int value) {
      this(new BagOfPrimitives(value, value, false, ""), value);
    }

    public ClassWithCustomTypeConverter(BagOfPrimitives bag, int value) {
      this.bag = bag;
      this.value = value;
    }

    public BagOfPrimitives getBag() {
      return bag;
    }

    public String getExpectedJson() {
      return "{\"url\":\"" + bag.getExpectedJson() + "\",\"value\":" + value + "}";
    }

    public int getValue() {
      return value;
    }
  }

  public static class ArrayOfObjects {
    private final BagOfPrimitives[] elements;
    public ArrayOfObjects() {
      elements = new BagOfPrimitives[3];
      for (int i = 0; i < elements.length; ++i) {
        elements[i] = new BagOfPrimitives(i, i+2, false, "i"+i);
      }
    }
    public String getExpectedJson() {
      StringBuilder sb = new StringBuilder("{\"elements\":[");
      boolean first = true;
      for (BagOfPrimitives element : elements) {
        if (first) {
          first = false;
        } else {
          sb.append(",");
        }
        sb.append(element.getExpectedJson());
      }
      sb.append("]}");
      return sb.toString();
    }
  }

  public static class ClassOverridingEquals {
    public ClassOverridingEquals ref;

    public String getExpectedJson() {
      if (ref == null) {
        return "{}";
      }
      return "{\"ref\":" + ref.getExpectedJson() + "}";
    }
    @Override
    public boolean equals(Object obj) {
      return true;
    }

    @Override
    public int hashCode() {
      return 1;
    }
  }

  public static class ClassWithArray {
    public final Object[] array;
    public ClassWithArray() {
      array = null;
    }

    public ClassWithArray(Object[] array) {
      this.array = array;
    }
  }

  public static class ClassWithObjects {
    public final BagOfPrimitives bag;
    public ClassWithObjects() {
      this(new BagOfPrimitives());
    }
    public ClassWithObjects(BagOfPrimitives bag) {
      this.bag = bag;
    }
  }

  public static class ClassWithSerializedNameFields {
    @SerializedName("fooBar") public final int f;
    @SerializedName("Another Foo") public final int g;

    public ClassWithSerializedNameFields() {
      this(1, 4);
    }
    public ClassWithSerializedNameFields(int f, int g) {
      this.f = f;
      this.g = g;
    }

    public String getExpectedJson() {
      return '{' + "\"fooBar\":" + f + ",\"Another Foo\":" + g + '}';
    }
  }

  public static class CrazyLongTypeAdapter
      implements JsonSerializer<Long>, JsonDeserializer<Long> {
    public static final long DIFFERENCE = 5L;
    @Override
    public JsonElement serialize(Long src, Type typeOfSrc, JsonSerializationContext context) {
      return new JsonPrimitive(src + DIFFERENCE);
    }
    @Override
    public Long deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
        throws JsonParseException {
      return json.getAsLong() - DIFFERENCE;
    }
  }
}
