package mypackage;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.ServletContext;

import org.apache.wicket.markup.html.WebPage;
import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.markup.html.form.Form;
import org.apache.wicket.markup.html.form.RadioChoice;
import org.apache.wicket.model.Model;
import org.apache.wicket.protocol.http.WebApplication;
import org.apache.wicket.request.mapper.parameter.PageParameters;

public class Quiz extends WebPage {
	private static final long serialVersionUID = 1L;
	int number = 0, score = 0;
	ArrayList<String[]> questions = new ArrayList<String[]>();
	ArrayList<String[]> results = new ArrayList<String[]>();
	String answer;
	Label messageLabel, textLabel;
	RadioChoice<String> radio;
	Form<Void> submitForm;

	public Quiz(final PageParameters parameters) {
		super(parameters);
		try {
			loadQuiz();
		} catch (IOException e) { /* 本来は何かエラーを表示する */ }

		messageLabel = new Label("message", new Model<String>());
		messageLabel.setEscapeModelStrings(false);  // タグをエスケープしない
		add(messageLabel);
		textLabel = new Label("text", new Model<String>());
		add(textLabel);
		submitForm = new Form<Void>("submitForm"){
			private static final long serialVersionUID = 1L;

			@Override
			protected void onSubmit() {
				String answer = radio.getModelObject();
				String[] tokens = questions.get(number++);
				String right = tokens[Integer.parseInt(tokens[tokens.length-1])];
				String check;
				if (answer.equals(right)) {
					score++;
					updateMessage("<p>正解です。</p>");
					check = "○";
				} else {
					updateMessage(String.format("<p>残念でした。あなたの選択は%s、正解は%sでした。</p>", answer, right));
					check = "×";
				}
				results.add(new String[] {""+number, tokens[0], answer, right, check} );
			}
		};
		radio = new RadioChoice<String>("radio", new Model<String>(), new ArrayList<String>());
		submitForm.add(radio);
		add(submitForm);
		
		updateMessage("<p>ようこそ、Quiz へ！<br/>では最初の問題です。</p>");
	}
	
	private void loadQuiz() throws IOException {
		ServletContext servletContext = WebApplication.get().getServletContext();
		File f = new File(servletContext.getRealPath("/WEB-INF/quiz.txt"));
		BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream(f), "UTF-8"));
		String line="";
		while((line=in.readLine())!=null) {
			line = line.trim();
			if(line.trim().equals("")) 
				continue;
			questions.add(line.split("\\s+"));
		}
		in.close();
	}
	
	private void updateMessage(String message) {
		if (number >= questions.size()) {
			Result resultPage = new Result(null);
			message += String.format("<p>これで　QUIZ は終わりです。正解は %d 問でした。</p>", score);
			resultPage.messageLabel.setDefaultModelObject(message);
			resultPage.listView.setModelObject(results);
			setResponsePage(resultPage);
		} else {
			messageLabel.setDefaultModelObject(message);
			String[] tokens = questions.get(number);
			textLabel.setDefaultModelObject(String.format("第 %d 問: %s", number+1, tokens[0]));
			List<String> options = new ArrayList<String>();
			for (int i=1; i<tokens.length-1; i++) {
				options.add(tokens[i]);
			}
			radio.setChoices(options);
		}
	}
}