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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.thrift.test;

import org.apache.thrift.protocol.TBinaryProtocol;
import org.apache.thrift.protocol.TProtocol;
import org.apache.thrift.transport.TMemoryBuffer;

import thrift.test.Empty;
import thrift.test.StructWithAUnion;
import thrift.test.TestUnion;
import thrift.test.SomeEnum;
import thrift.test.ComparableUnion;

public class UnionTest {

  /**
   * @param args
   */
  public static void main(String[] args) throws Exception {
    testBasic();
    testEquality();
    testSerialization();
    testCompareTo();
  }

  public static void testBasic() throws Exception {
    TestUnion union = new TestUnion();

    if (union.isSet()) {
      throw new RuntimeException("new union with default constructor counts as set!");
    }

    if (union.getFieldValue() != null) {
      throw new RuntimeException("unset union didn't return null for value");
    }

    union = new TestUnion(TestUnion._Fields.I32_FIELD, 25);

    if ((Integer)union.getFieldValue() != 25) {
      throw new RuntimeException("set i32 field didn't come out as planned");
    }

    if ((Integer)union.getFieldValue(TestUnion._Fields.I32_FIELD) != 25) {
      throw new RuntimeException("set i32 field didn't come out of TBase getFieldValue");
    }

    try {
      union.getFieldValue(TestUnion._Fields.STRING_FIELD);
      throw new RuntimeException("was expecting an exception around wrong set field");
    } catch (IllegalArgumentException e) {
      // cool!
    }

    System.out.println(union);

    union = new TestUnion();
    union.setI32_field(1);
    if (union.getI32_field() != 1) {
      throw new RuntimeException("didn't get the right value for i32 field!");
    }
    union.hashCode();

    try {
      union.getString_field();
      throw new RuntimeException("should have gotten an exception");
    } catch (Exception e) {
      // sweet
    }

    union = TestUnion.i32_field(1);
    
    if (union.equals((TestUnion)null)) {
      throw new RuntimeException("uh oh, union.equals(null)!");
    }

    union = TestUnion.enum_field(SomeEnum.ONE);
    union.hashCode();
  }


  public static void testEquality() throws Exception {
    TestUnion union = new TestUnion(TestUnion._Fields.I32_FIELD, 25);

    TestUnion otherUnion = new TestUnion(TestUnion._Fields.STRING_FIELD, "blah!!!");

    if (union.equals(otherUnion)) {
      throw new RuntimeException("shouldn't be equal");
    }

    otherUnion = new TestUnion(TestUnion._Fields.I32_FIELD, 400);

    if (union.equals(otherUnion)) {
      throw new RuntimeException("shouldn't be equal");
    }

    otherUnion = new TestUnion(TestUnion._Fields.OTHER_I32_FIELD, 25);

    if (union.equals(otherUnion)) {
      throw new RuntimeException("shouldn't be equal");
    }
  }


  public static void testSerialization() throws Exception {
    TestUnion union = new TestUnion(TestUnion._Fields.I32_FIELD, 25);

    TMemoryBuffer buf = new TMemoryBuffer(0);
    TProtocol proto = new TBinaryProtocol(buf);

    union.write(proto);

    TestUnion u2 = new TestUnion();

    u2.read(proto);

    if (!u2.equals(union)) {
      throw new RuntimeException("serialization fails!");
    }

    StructWithAUnion swau = new StructWithAUnion(u2);

    buf = new TMemoryBuffer(0);
    proto = new TBinaryProtocol(buf);

    swau.write(proto);

    StructWithAUnion swau2 = new StructWithAUnion();
    if (swau2.equals(swau)) {
      throw new RuntimeException("objects match before they are supposed to!");
    }
    swau2.read(proto);
    if (!swau2.equals(swau)) {
      throw new RuntimeException("objects don't match when they are supposed to!");
    }

    // this should NOT throw an exception.
    buf = new TMemoryBuffer(0);
    proto = new TBinaryProtocol(buf);

    swau.write(proto);
    new Empty().read(proto);
  }
  
  public static void testCompareTo() throws Exception {
    ComparableUnion cu = ComparableUnion.string_field("a");
    ComparableUnion cu2 = ComparableUnion.string_field("b");

    if (cu.compareTo(cu2) != -1) {
      throw new RuntimeException("a was supposed to be < b, but was " + cu.compareTo(cu2));
    }

    if (cu2.compareTo(cu) != 1) {
      throw new RuntimeException("b was supposed to be > a, but was " + cu2.compareTo(cu));
    }

    cu2 = ComparableUnion.binary_field(new byte[]{2});

    if (cu.compareTo(cu2) != -1) {
      throw new RuntimeException("a was supposed to be < b, but was " + cu.compareTo(cu2));
    }

    if (cu2.compareTo(cu) != 1) {
      throw new RuntimeException("b was supposed to be > a, but was " + cu2.compareTo(cu));
    }

    cu = ComparableUnion.binary_field(new byte[]{1});

    if (cu.compareTo(cu2) != -1) {
      throw new RuntimeException("a was supposed to be < b, but was " + cu.compareTo(cu2));
    }

    if (cu2.compareTo(cu) != 1) {
      throw new RuntimeException("b was supposed to be > a, but was " + cu2.compareTo(cu));
    }
  }
}