/*
 * Copyright (C) 2015 NuBits Developers
 * Copyright (C) 2015 Matthew Mitchell
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.matthewmitchell.peercoinj.shapeshift;

import com.matthewmitchell.peercoinj.core.Coin;
import com.matthewmitchell.peercoinj.core.Monetary;
import com.matthewmitchell.peercoinj.core.NetworkParameters;
import com.matthewmitchell.peercoinj.utils.MonetaryFormat;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.math.BigDecimal;

/**
 * The {@link com.matthewmitchell.peercoinj.core.NetworkParameters} for a ShapeShift coin
 *
 * @author Matthew Mitchell
 */
public class ShapeShiftCoin extends NetworkParameters {
	
	private static MonetaryFormat FORMAT8 = new MonetaryFormat().shift(0).minDecimals(2).repeatOptionalDecimals(1, 6).noCode();
	private static MonetaryFormat FORMAT6 = new MonetaryFormat().shift(0).minDecimals(2).repeatOptionalDecimals(1, 4).noCode();
	private static MonetaryFormat FORMAT5 = new MonetaryFormat().shift(0).minDecimals(2).repeatOptionalDecimals(1, 3).noCode();
	private static MonetaryFormat FORMAT4 = new MonetaryFormat().shift(0).minDecimals(2).repeatOptionalDecimals(1, 2).noCode();
	
	public final String name;
	public final String coinCode;
	public final int exponent;
	
	public transient MonetaryFormat format;
	
	static public int ADDRESS_PREFIX_NULL = -1;
	
	private void setFormat() {
		
		if (exponent == 8) 
			this.format = FORMAT8;
		else if (exponent == 6) 
			this.format = FORMAT6;
		else if (exponent == 5)
			this.format = FORMAT5;
        else
            this.format = FORMAT4;
		
	}
	
    /**
     * Construct a ShapeShiftCoin instance with given parameters.
     *
     * @params name The human readable coin name
     * @params uriPrefix The prefix before ":" on coin URIs
     * @params coinCode The code used to identify the coin, in capitals and typically 3-5 characters
     * @params exponent The number of decimals after the decimal place.
     * @params addressHeader The integer of the address prefix for pubKeyHash addresses
     * @params p2shHeader The integer of the address prefix for P2SH addresses
     */
	public ShapeShiftCoin(String name, String uriPrefix, String coinCode, int exponent, int addressHeader, int p2shHeader) {
		this.name = name;
		this.id = uriPrefix;
		this.coinCode = coinCode;
		this.exponent = exponent;
		this.addressHeader = addressHeader;
        this.p2shHeader = p2shHeader;
        this.acceptableAddressCodes = new int[] { addressHeader, p2shHeader };
		setFormat();
	}
	
	private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
		in.defaultReadObject();
		setFormat();
	}

	@Override
	public String getPaymentProtocolId() {
		throw new UnsupportedOperationException("Not supported.");
	}
	
	@Override
	public ShapeShiftMonetary parseCoin(String str) {
		return new ShapeShiftMonetary(new BigDecimal(str).movePointRight(exponent).toBigIntegerExact().longValue(), exponent);
    }
	
    /**
     * Gets a {@link com.matthewmitchell.peercoinj.shapeshift.ShapeShiftMonetary} by rounding amounts
     */
	public ShapeShiftMonetary parseCoinInexact(String str) {
		return new ShapeShiftMonetary(new BigDecimal(str).movePointRight(exponent).setScale(0, BigDecimal.ROUND_HALF_UP).toBigInteger().longValue(), exponent);
	}
	
	@Override
	public boolean isShapeShift() {
		return true;
	}
	
	@Override
	public String toString() {
		return name;
	}
	
}