package net.sourceforge.phpdt.internal.compiler.ast;

import gatchan.phpparser.parser.PHPParser;
import net.sourceforge.phpdt.internal.compiler.ast.declarations.VariableUsage;

import java.util.List;

/**
 * an else statement.
 * it's else
 *
 * @author Matthieu Casanova
 */
public class Else extends Statement
{

	/**
	 * the statements.
	 */
	private final Statement[] statements;

	/**
	 * An else statement bad version ( : endif).
	 *
	 * @param statements  the statements
	 * @param sourceStart the starting offset
	 * @param sourceEnd   the ending offset
	 */
	public Else(Statement[] statements,
		    int sourceStart,
		    int sourceEnd,
		    int beginLine,
		    int endLine,
		    int beginColumn,
		    int endColumn)
	{
		super(sourceStart, sourceEnd, beginLine, endLine, beginColumn, endColumn);
		this.statements = statements;
	}

	/**
	 * An else statement good version
	 *
	 * @param statement   the statement (it could be a block)
	 * @param sourceStart the starting offset
	 * @param sourceEnd   the ending offset
	 */
	public Else(Statement statement,
		    int sourceStart,
		    int sourceEnd,
		    int beginLine,
		    int endLine,
		    int beginColumn,
		    int endColumn)
	{
		super(sourceStart, sourceEnd, beginLine, endLine, beginColumn, endColumn);
		statements = new Statement[1];
		statements[0] = statement;
	}

	/**
	 * Return the object into String.
	 *
	 * @param tab how many tabs (not used here
	 * @return a String
	 */
	@Override
	public String toString(int tab)
	{
		StringBuilder buff = new StringBuilder(tabString(tab));
		buff.append("else \n");
		Statement statement;
		for (int i = 0; i < statements.length; i++)
		{
			statement = statements[i];
			buff.append(statement.toString(tab + 1)).append('\n');
		}
		return buff.toString();
	}

	/**
	 * Get the variables from outside (parameters, globals ...)
	 *
	 * @param list the list where we will put variables
	 */
	@Override
	public void getOutsideVariable(List<VariableUsage> list)
	{
		for (int i = 0; i < statements.length; i++)
		{
			statements[i].getOutsideVariable(list);
		}
	}

	/**
	 * get the modified variables.
	 *
	 * @param list the list where we will put variables
	 */
	@Override
	public void getModifiedVariable(List<VariableUsage> list)
	{
		for (int i = 0; i < statements.length; i++)
		{
			statements[i].getModifiedVariable(list);
		}
	}

	/**
	 * Get the variables used.
	 *
	 * @param list the list where we will put variables
	 */
	@Override
	public void getUsedVariable(List<VariableUsage> list)
	{
		for (int i = 0; i < statements.length; i++)
		{
			statements[i].getUsedVariable(list);
		}
	}

	@Override
	public Expression expressionAt(int line, int column)
	{
		for (int i = 0; i < statements.length; i++)
		{
			Statement statement = statements[i];
			if (statement.isAt(line, column)) return statement.expressionAt(line, column);
		}
		return null;
	}

	@Override
	public void analyzeCode(PHPParser parser)
	{
		for (int i = 0; i < statements.length; i++)
		{
			statements[i].analyzeCode(parser);
		}
	}
}