/*
 * 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.sysds.runtime.data;

import org.apache.sysds.common.Warnings;
import org.apache.sysds.common.Types.ValueType;
import org.apache.sysds.runtime.util.DataConverter;
import org.apache.sysds.runtime.util.UtilFunctions;

import java.util.Arrays;

public class DenseBlockLString extends DenseBlockLDRB
{
	private static final long serialVersionUID = -6632424825959423264L;

	protected String[][] _blocks;

	public DenseBlockLString(int[] dims) {
		super(dims);
		reset(_rlen, _odims, 0);
	}

	@Override
	protected void allocateBlocks(int numBlocks) {
		_blocks = new String[numBlocks][];
	}

	@Override
	protected void allocateBlock(int bix, int length) {
		_blocks[bix] = new String[length];
	}

	@Override
	protected void setInternal(int bix, int ix, double v) {
		_blocks[bix][ix] = String.valueOf(v);
	}

	@Override
	public boolean isNumeric() {
		return false;
	}
	
	@Override
	public boolean isNumeric(ValueType vt) {
		return false;
	}

	@Override
	public boolean isContiguous() {
		return _blocks.length == 1;
	}

	@Override
	public int numBlocks() {
		return _blocks.length;
	}

	@Override
	public long capacity() {
		return (_blocks!=null) ? (long)(_blocks.length - 1) * _blocks[0].length + _blocks[_blocks.length - 1].length : -1;
	}

	@Override
	protected long computeNnz(int bix, int start, int length) {
		return UtilFunctions.computeNnz(_blocks[bix], start, length);
	}

	@Override
	public double[] values(int r) {
		return valuesAt(index(r));
	}
	
	@Override
	public double[] valuesAt(int bix) {
		Warnings.warnFullFP64Conversion(_blocks[bix].length);
		return DataConverter.toDouble(_blocks[bix]);
	}

	@Override
	public void incr(int r, int c) {
		throw new UnsupportedOperationException();
	}

	@Override
	public void incr(int r, int c, double delta) {
		throw new UnsupportedOperationException();
	}

	@Override
	public void fillBlock(int bix, int fromIndex, int toIndex, double v) {
		Arrays.fill(_blocks[bix], fromIndex, toIndex, String.valueOf(v));
	}

	@Override 
	public void fillRow(int r, double v){
		int start = pos(r);
		int end = start + getDim(1);
		Arrays.fill(_blocks[index(r)], start, end, String.valueOf(v));
	}

	@Override
	public DenseBlock set(String s) {
		for (int i = 0; i < numBlocks() - 1; i++) {
			Arrays.fill(_blocks[i], 0, blockSize() * _odims[0], s);
		}
		Arrays.fill(_blocks[numBlocks() - 1], 0, blockSize(numBlocks() - 1) * _odims[0], s);
		return this;
	}

	@Override
	public DenseBlock set(int r, int c, double v) {
		_blocks[index(r)][pos(r, c)] = String.valueOf(v);
		return this;
	}

	@Override
	public DenseBlock set(DenseBlock db) {
		int[] ix = new int[numDims()];
		int roff = 0;
		for (int bi = 0; bi < numBlocks(); bi++) {
			for (int r = 0; r < blockSize(); r++) {
				ix[0] = r + roff;
				for (int c = 0; c < _odims[0]; c++) {
					ix[ix.length - 1] = c; // for linear scan
					_blocks[bi][r * _odims[0] + c] = db.getString(ix);
				}
			}
			roff += blockSize();
		}
		return this;
	}

	@Override
	public DenseBlock set(int[] ix, double v) {
		_blocks[index(ix[0])][pos(ix)] = String.valueOf(v);
		return this;
	}

	@Override
	public DenseBlock set(int[] ix, long v) {
		_blocks[index(ix[0])][pos(ix)] = String.valueOf(v);
		return this;
	}

	@Override
	public DenseBlock set(int[] ix, String v) {
		_blocks[index(ix[0])][pos(ix)] = v;
		return this;
	}

	@Override
	public double get(int r, int c) {
		return Double.parseDouble(_blocks[index(r)][pos(r, c)]);
	}

	@Override
	public double get(int[] ix) {
		return Double.parseDouble(_blocks[index(ix[0])][pos(ix)]);
	}

	@Override
	public String getString(int[] ix) {
		return _blocks[index(ix[0])][pos(ix)];
	}

	@Override
	public long getLong(int[] ix) {
		return Long.parseLong(_blocks[index(ix[0])][pos(ix)]);
	}
}
