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// TableReport.java
//
// (c) 1999-2001 PAL Development Core Team
//
// This package may be distributed under the
// terms of the Lesser GNU General Public License (LGPL)
package net.maizegenetics.util;

import java.util.StringJoiner;
import java.util.stream.Collectors;
import java.util.stream.Stream;

/**
 * Interface for classes with data that can be presented in tables
 *
 * @author Ed Buckler
 */
public interface TableReport {

    /**
     * Get the names of the columns
     *
     * @return columns names
     */
    public Object[] getTableColumnNames();

    /**
     * Get the title of the table
     *
     * @return title
     */
    public String getTableTitle();

    /**
     * Get the number of the columns
     *
     * @return number of columns
     */
    public int getColumnCount();

    /**
     * Get the number of rows
     *
     * @return number of rows
     */
    public long getRowCount();

    /**
     * Get the total number of elements in the dataset. Elements = rowCount *
     * columnCount;
     *
     * @return number of elements
     */
    public long getElementCount();

    /**
     * Returns specified row.
     *
     * @param row row number
     *
     * @return row
     */
    public Object[] getRow(long row);

    /**
     * Returns value at given row and column.
     *
     * @param row row number
     * @param col column number
     *
     * @return data
     */
    public Object getValueAt(long row, int col);

    default String toStringTabDelim() {
        StringBuilder sb=new StringBuilder();
        sb.append(Stream.of(getTableColumnNames()).map(Object::toString).collect(Collectors.joining("\t")));
        sb.append("\n");
        for (int i = 0; i < getRowCount(); i++) {
            sb.append(Stream.of(getRow(i))
                    .map(o -> (o==null)?"NULL":o.toString())
                    .collect(Collectors.joining("\t")));
            sb.append("\n");
        }
        return sb.toString();
    }

}