/***************************************************************************
    Description          : KPuzzle - A KDE Jigsaw Puzzle Game
    Version              : 0.2
    Copyright            : (C) 2000-2001 by Michael Wand
    EMail                : mwand@gmx.de
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#include "main.h"

#include "highscore.h"

#include <qfile.h>
#include <qptrlist.h>
#include <qlineedit.h>
#include <qinputdialog.h>
#include <qdir.h>

#include <klocale.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <malloc.h>

#define HIGHSCORE_FILE_NAME "/.kpuzzle-highscores"

/* Constructor with the additional parameter ys (the number which must
 * be shown in the "Your Score" field). The "Your Score" field will be
 * invisible if ys == 0.
 * Additionally, if ys != 0, the initializeDialog() function will prompt
 * for the player's name if necessary.
 * This function only creates the widget structure for the dialog,
 * all data is initialized by the initializeDialog() function.
 */
CHighscoreDialog::CHighscoreDialog(QWidget* parent,int ys) :
  QDialog(parent,"Highscores",true)
{
	setCaption(i18n("Highscores"));

	/* Internal vars. */
	_yourScore = ys;

	_list = new QPtrList<CListElement>;
	_list->setAutoDelete(true);

	/* Box layout */
	_vbox = new QVBoxLayout(this,30,20);

	/* This is the "Your Result" label, which is shown only if
	 * _yourScore != 0. 
	 */
	_yourResult = NULL;
	if (_yourScore) {
		_yourResult = new QLabel(this);
		_vbox->addWidget(_yourResult);
	}

	/* The list widget. */
	_listBox = new QListBox(this);
	_listBox->setEnabled(false);
	_listBox->setMinimumSize(QSize(80,100));
	_vbox->addWidget(_listBox);

	_ok = new QPushButton(i18n("OK"),this);
	_ok->setDefault(true);
	_vbox->addWidget(_ok);

	connect(_ok,SIGNAL(clicked()),this,SLOT(accept()));

	_vbox->activate();
}

/* Initializes all dialog data. Prompts for the player's name if
 * he has earned a place in the highscore list.
 */
void CHighscoreDialog::initializeDialog()
{
	char temp[40];
	char newEntry = readList();

	if (_yourScore) {
		if (newEntry != -1) {
			QString n = nameDialog();
			if (n != "") {
				_list->insert(newEntry,new CListElement(_yourScore,n));
				sprintf(temp,i18n("%1 %2").arg(_yourScore).arg((const char*) n));
				_list->removeLast();
			} else
				sprintf(temp,i18n("%1 - No Highscore entry").arg(_yourScore));
		} else {
			sprintf(temp,i18n("You are not in the Highscores."));
		}

		_yourResult->setText(temp);
	}

	QPtrListIterator<CListElement> it(*_list);
	it.toFirst();
	while(it.current()) {
		char* s; s = (char*) malloc(30);
		memset(s,0,30);
		sprintf(s,i18n("%1 %2").arg(it.current()->_score).arg((const char*) it.current()->_name));
		_listBox->insertItem(new QListBoxText(s));
		++it;
		free(s);
	}

}

/* Destructor */
CHighscoreDialog::~CHighscoreDialog()
{
	writeList();
	delete _ok;
	delete _listBox;
	if (_yourScore) delete _yourResult;
	delete _list;
}

/* Show a dialog which prompts the user for his name, and
 * return this name. */
QString CHighscoreDialog::nameDialog()
{
	bool OK;
	QString ret = QInputDialog::getText(i18n("Your name"),i18n("Enter your name for highscore list"),
			QLineEdit::Normal,i18n("My name"),&OK);
	if (!OK) return QString::null;
	else return ret;
}

/* unused XXX */
void CHighscoreDialog::getHighscoreFile(QString& name)
{
	name = QDir::homeDirPath();
}

/* Read the highscore list from a file, return the position
 * of the player in the list (with respect to _yourScore).
 * The filename is QDir::homeDirPath() + HIGHSCORE_FILE_NAME.
 */
char CHighscoreDialog::readList()
{
	char name[50];
	QString filename;

	int score;
	int readChars;
	char place = -1; /* Place of player in highscores */
	char counter = 0;

	filename = QDir::homeDirPath() + HIGHSCORE_FILE_NAME;
	FILE* f = fopen(filename,"r");

	if (!f) return 0;

	do {
		readChars = fscanf(f,"%d %s",&score,name);
		if (readChars != 2) break;

		char* spc;
		while ((spc = strchr(name,'\\')) != NULL) {
			*spc = ' ';
		}

		_list->append(new CListElement(score,name));

		if (place == -1 && score < _yourScore) place = counter;

		counter++;
	} while (counter < MAX_HIGHSCORES - 1);

	if (place == -1 && counter < MAX_HIGHSCORES - 1) place = counter;

	fclose(f);

	return place;
}

/* Writes the highscore list to a file. */
bool CHighscoreDialog::writeList()
{
	QString filename;

	filename = QDir::homeDirPath() + HIGHSCORE_FILE_NAME;
	FILE* f = fopen(filename,"w");
	if (!f) return false;

	QPtrListIterator<CListElement> it(*_list);
	for (it.toFirst();it.current();++it) {
		char name[21];
		strcpy(name,it.current()->_name);
		char* spc;
		while ((spc = strchr(name,' ')) != NULL) {
			*spc = '\\';
		}

		fprintf(f,"%i %s\n",it.current()->_score,name);
 	}

	fclose(f);
	return true;
}