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package org.unix4j.unix.find;

import java.util.List;
import java.util.Map;
import java.util.Arrays;

import org.unix4j.command.Arguments;
import org.unix4j.context.ExecutionContext;
import org.unix4j.convert.ValueConverter;
import org.unix4j.option.DefaultOptionSet;
import org.unix4j.util.ArgsUtil;
import org.unix4j.util.ArrayUtil;
import org.unix4j.variable.Arg;
import org.unix4j.variable.VariableContext;

import org.unix4j.unix.Find;

/**
 * Arguments and options for the {@link Find find} command.
 */
public final class FindArguments implements Arguments {
	
	private final FindOptions options;

	
	// operand: 
	private String path;
	private boolean pathIsSet = false;
	
	// operand: 
	private String name;
	private boolean nameIsSet = false;
	
	// operand: 
	private long size;
	private boolean sizeIsSet = false;
	
	// operand: 
	private java.util.Date time;
	private boolean timeIsSet = false;
	
	// operand: 
	private String[] args;
	private boolean argsIsSet = false;
	
	/**
	 * Constructor to use if no options are specified.
	 */
	public FindArguments() {
		this.options = FindOptions.EMPTY;
	}

	/**
	 * Constructor with option set containing the selected command options.
	 * 
	 * @param options the selected options
	 * @throws NullPointerException if the argument is null
	 */
	public FindArguments(FindOptions options) {
		if (options == null) {
			throw new NullPointerException("options argument cannot be null");
		}
		this.options = options;
	}
	
	/**
	 * Returns the options set containing the selected command options. Returns
	 * an empty options set if no option has been selected.
	 * 
	 * @return set with the selected options
	 */
	public FindOptions getOptions() {
		return options;
	}

	/**
	 * Constructor string arguments encoding options and arguments, possibly
	 * also containing variable expressions. 
	 * 
	 * @param args string arguments for the command
	 * @throws NullPointerException if args is null
	 */
	public FindArguments(String... args) {
		this();
		this.args = args;
		this.argsIsSet = true;
	}
	private Object[] resolveVariables(VariableContext context, String... unresolved) {
		final Object[] resolved = new Object[unresolved.length];
		for (int i = 0; i < resolved.length; i++) {
			final String expression = unresolved[i];
			if (Arg.isVariable(expression)) {
				resolved[i] = resolveVariable(context, expression);
			} else {
				resolved[i] = expression;
			}
		}
		return resolved;
	}
	private  V convertList(ExecutionContext context, String operandName, Class operandType, List