/**
 * Copyright 2012 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.devcoin.core;


import static com.google.common.base.Preconditions.checkNotNull;

/**
 * A Transaction in a Wallet - includes the pool ID
 * 
 * @author Miron Cuperman
 */
public class WalletTransaction {
    /**
     * This is a bitfield oriented enum, with the following bits:
     * 
     * <li>bit 0 - spent
     * <li>bit 1 - appears in alt chain
     * <li>bit 2 - appears in best chain
     * <li>bit 3 - double-spent
     * <li>bit 4 - pending (we would like the tx to go into the best chain)
     * 
     * <p>Not all combinations are interesting, just the ones actually used in the enum.
     */
    public enum Pool {
        UNSPENT(4), // unspent in best chain
        SPENT(5), // spent in best chain
        INACTIVE(2), // in alt chain
        DEAD(10), // double-spend in alt chain
        PENDING(16), // a pending tx we would like to go into the best chain
        PENDING_INACTIVE(18), // a pending tx in alt but not in best yet
        ALL(-1);
        
        private int value;
        Pool(int value) {
            this.value = value;
        }
        
        public int getValue() {
            return value;
        }

        public static Pool valueOf(int value) {
            switch (value) {
            case 4: return UNSPENT;
            case 5: return SPENT;
            case 2: return INACTIVE;
            case 10: return DEAD;
            case 16: return PENDING;
            case 18: return PENDING_INACTIVE;
            default: return null;
            }
        }
    }
    private Transaction transaction;
    private Pool pool;
    
    public WalletTransaction(Pool pool, Transaction transaction) {
        this.pool = checkNotNull(pool);
        this.transaction = transaction;
    }

    public Transaction getTransaction() {
        return transaction;
    }
    
    public Pool getPool() {
        return pool;
    }
}