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package org.scijava.script;

import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.stream.Collectors;

import javax.script.Bindings;
import javax.script.ScriptContext;
import javax.script.ScriptEngine;

/**
 * Abstract base class for {@link AutoCompleter} implementations.
 * 
 * @author Hadrien Mary
 */
public abstract class AbstractAutoCompleter implements AutoCompleter {

	@SuppressWarnings("unused")
	private ScriptLanguage scriptLanguage;

	public AbstractAutoCompleter(final ScriptLanguage scriptLanguage) {
		this.scriptLanguage = scriptLanguage;
	}

	@Override
	public AutoCompletionResult autocomplete(final String code, final int index,
		final ScriptEngine engine)
	{

		final List matches = new ArrayList<>();
		final int startIndex = 0;

		if (code.endsWith(".")) {
			// Autocompletion with all the attributes of the object
			matches.addAll(engineAttributesCompleter(code, index, engine));

		}
		else if (code.contains(".")) {
			final List codeList = Arrays.asList(code.split("\\."));
			final String objectString = codeList.get(codeList.size() - 2);
			final String prefix = codeList.get(codeList.size() - 1);
			matches.addAll(engineAttributesCompleter(objectString + ".",
				prefix, index, engine));

		}
		else {
			// Autocompletion with variables in the engine scope
			matches.addAll(engineVariablesCompleter(code, index, engine));
		}

		// Remove duplicates
		final List unique = //
			matches.stream().distinct().collect(Collectors.toList());

		// Sort alphabetically, ignoring case
		Collections.sort(unique, new Comparator