/*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2006-2008 Igor Ulyanov <iulyanov@gmail.com>

 * Copyright (c) 2004-2015 Andrey Korotaev <unC0Rr@gmail.com>

 *

 * 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; version 2 of the License

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 */

#include "selectWeapon.h"

#include "weaponItem.h"

#include "hwconsts.h"

#include <QDebug>

#include <QPushButton>

#include <QGridLayout>

#include <QHBoxLayout>

#include <QLabel>

#include <QBitmap>

#include <QLineEdit>

#include <QSettings>

#include <QMessageBox>

#include <QTabWidget>

#include <QRegExp>

#include <QRegExpValidator>

#include <math.h>

QImage getAmmoImage(int num)

{

    static QImage ammo(":Ammos.png");

    int x = num/(ammo.height()/32);

    int y = (num-((ammo.height()/32)*x))*32;

    x*=32;

    return ammo.copy(x, y, 32, 32);

}

SelWeaponItem::SelWeaponItem(bool allowInfinite, int iconNum, int wNum, QImage image, QImage imagegrey, QWidget* parent) :

    QWidget(parent)

{

    QHBoxLayout* hbLayout = new QHBoxLayout(this);

    hbLayout->setSpacing(1);

    hbLayout->setMargin(1);

    QLabel* lbl = new QLabel(this);

    lbl->setPixmap(QPixmap::fromImage(getAmmoImage(iconNum)));

    lbl->setMaximumWidth(30);

    lbl->setGeometry(0, 0, 30, 30);

    hbLayout->addWidget(lbl);

    item = new WeaponItem(image, imagegrey, this);

    item->setItemsNum(wNum);

    item->setInfinityState(allowInfinite);

    hbLayout->addWidget(item);

    hbLayout->setStretchFactor(lbl, 1);

    hbLayout->setStretchFactor(item, 99);

    hbLayout->setAlignment(lbl, Qt::AlignLeft | Qt::AlignVCenter);

    hbLayout->setAlignment(item, Qt::AlignLeft | Qt::AlignVCenter);

}

void SelWeaponItem::setItemsNum(const unsigned char num)

{

    item->setItemsNum(num);

}

unsigned char SelWeaponItem::getItemsNum() const

{

    return item->getItemsNum();

}

void SelWeaponItem::setEnabled(bool value)

{

    item->setEnabled(value);

}

int SelWeaponWidget::readWeaponValue(const QChar chr, int max)

{

    int value = chr.digitValue();

    if (value == -1)

        value = 0;

    else if (value > max)

        value = max;

    return value;

}

SelWeaponWidget::SelWeaponWidget(int numItems, QWidget* parent) :

    QFrame(parent),

    m_numItems(numItems)

{

    wconf = new QMap<QString, QString>();

    for(int i = 0; i < cDefaultAmmos.size(); ++i)

    {

        wconf->insert(cDefaultAmmos[i].first, cDefaultAmmos[i].second);

    }

    if (!QDir(cfgdir->absolutePath() + "/Schemes").exists()) {

        QDir().mkdir(cfgdir->absolutePath() + "/Schemes");

    }

    QStringList defaultAmmos;

    for(int i = 0; i < cDefaultAmmos.size(); ++i)

    {

        defaultAmmos.append(cDefaultAmmos[i].first.toLower());

    }

    if (!QDir(cfgdir->absolutePath() + "/Schemes/Ammo").exists()) {

        qDebug("No /Schemes/Ammo directory found. Trying to import weapon schemes from weapons.ini.");

        QDir().mkdir(cfgdir->absolutePath() + "/Schemes/Ammo");

        QSettings old_wconf(cfgdir->absolutePath() + "/weapons.ini", QSettings::IniFormat);

        QStringList keys = old_wconf.allKeys();

        int imported = 0;

        for(int i = 0; i < keys.size(); i++)

        {

            if (!defaultAmmos.contains(keys[i].toLower())) {

                wconf->insert(keys[i], fixWeaponSet(old_wconf.value(keys[i]).toString()));

                QFile file(cfgdir->absolutePath() + "/Schemes/Ammo/" + keys[i] + ".hwa");

                if (file.open(QIODevice::WriteOnly)) {

                    QTextStream stream( &file );

                    stream << old_wconf.value(keys[i]).toString() << endl;

                    file.close();

                }

                imported++;

            }

        }

        qDebug("%d weapon scheme(s) imported.", imported);

    } else {

        QStringList schemes = QDir(cfgdir->absolutePath() + "/Schemes/Ammo").entryList(QDir::Files);

        for(int i = 0; i < schemes.size(); i++)

        {

            QFile file(cfgdir->absolutePath() + "/Schemes/Ammo/" + schemes[i]);

            QString config;

            if (file.open(QIODevice::ReadOnly)) {

                QTextStream stream( &file );

                stream >> config;

                file.close();

            }

            // Chop off file name suffix

            QString schemeName = schemes[i];

            if (schemeName.endsWith(".hwa", Qt::CaseInsensitive)) {

                schemeName.chop(4);

            }

            // Don't load weapon scheme if name collides with any default scheme

            if (!defaultAmmos.contains(schemeName.toLower()))

                wconf->insert(schemeName, fixWeaponSet(config));

            else

                qWarning("Weapon scheme \"%s\" not loaded from file, name collides with a default scheme!", qPrintable(schemeName));

        }

    }

    QString currentState = *cDefaultAmmoStore;

    QTabWidget * tbw = new QTabWidget(this);

    QWidget * page1 = new QWidget(this);

    p1Layout = new QGridLayout(page1);

    p1Layout->setSpacing(1);

    p1Layout->setMargin(1);

    QWidget * page2 = new QWidget(this);

    p2Layout = new QGridLayout(page2);

    p2Layout->setSpacing(1);

    p2Layout->setMargin(1);

    QWidget * page3 = new QWidget(this);

    p3Layout = new QGridLayout(page3);

    p3Layout->setSpacing(1);

    p3Layout->setMargin(1);

    QWidget * page4 = new QWidget(this);

    p4Layout = new QGridLayout(page4);

    p4Layout->setSpacing(1);

    p4Layout->setMargin(1);

    tbw->addTab(page1, tr("Weapon set"));

    tbw->addTab(page2, tr("Probabilities"));

    tbw->addTab(page4, tr("Ammo in boxes"));

    tbw->addTab(page3, tr("Delays"));

    QGridLayout * pageLayout = new QGridLayout(this);

    pageLayout->addWidget(tbw);

    int j = -1;

    int i = 0, k = 0;

    for(; i < m_numItems; ++i)

    {

        if (k % cAmmoMenuRows == 0)

            ++j;

        unsigned int ammo = ammoMenuAmmos[i];

        // Hide amSkip (7)

        if (ammo == 7)

            continue;

        // Hide unused amCreeper (58)

        else if (ammo == 58)

        {

            ++k;

            continue;

        }

        int a = ammo-1; // ammo ID for SelWeaponItem

        SelWeaponItem * swi = new SelWeaponItem(true, a, readWeaponValue(currentState[a], 9), QImage(":/res/ammopic.png"), QImage(":/res/ammopicgrey.png"), this);

        weaponItems[a].append(swi);

        p1Layout->addWidget(swi, j, k % cAmmoMenuRows);

        SelWeaponItem * pwi = new SelWeaponItem(false, a, readWeaponValue(currentState[numItems + a], 8), QImage(":/res/ammopicbox.png"), QImage(":/res/ammopicboxgrey.png"), this);

        weaponItems[a].append(pwi);

        p2Layout->addWidget(pwi, j, k % cAmmoMenuRows);

        SelWeaponItem * dwi = new SelWeaponItem(false, a, readWeaponValue(currentState[numItems*2 + a], 8), QImage(":/res/ammopicdelay.png"), QImage(":/res/ammopicdelaygrey.png"), this);

        weaponItems[a].append(dwi);

        p3Layout->addWidget(dwi, j, k % cAmmoMenuRows);

        SelWeaponItem * awi = new SelWeaponItem(false, a, readWeaponValue(currentState[numItems*3 + a], 8), QImage(":/res/ammopic.png"), QImage(":/res/ammopicgrey.png"), this);

        weaponItems[a].append(awi);

        p4Layout->addWidget(awi, j, k % cAmmoMenuRows);

        ++k;

    }

    //pLayout->setRowStretch(5, 100);

    m_name = new QLineEdit(this);

    QRegExp rx(*cSafeFileNameRegExp);

    QRegExpValidator* val = new QRegExpValidator(rx, m_name);

    m_name->setValidator(val);

    pageLayout->addWidget(m_name, i, 0, 1, 5);

}

void SelWeaponWidget::setWeapons(const QString& ammo)

{

    bool enable = true;

    for(int i = 0; i < cDefaultAmmos.size(); i++)

    {

        if (!cDefaultAmmos[i].first.compare(m_name->text()))

        {

            enable = false;

            break;

        }

    }

    for(int i = 0; i < m_numItems; ++i)

    {

        twi::iterator it = weaponItems.find(i);

        if (it == weaponItems.end()) continue;

        it.value()[0]->setItemsNum(readWeaponValue(ammo[i], 9));

        it.value()[1]->setItemsNum(readWeaponValue(ammo[m_numItems + i], 8));

        it.value()[2]->setItemsNum(readWeaponValue(ammo[m_numItems*2 + i], 8));

        it.value()[3]->setItemsNum(readWeaponValue(ammo[m_numItems*3 + i], 8));

        it.value()[0]->setEnabled(enable);

        it.value()[1]->setEnabled(enable);

        it.value()[2]->setEnabled(enable);

        it.value()[3]->setEnabled(enable);

    }

    m_name->setEnabled(enable);

}

void SelWeaponWidget::setDefault()

{

    for(int i = 0; i < cDefaultAmmos.size(); i++)

    {

        if (!cDefaultAmmos[i].first.compare(m_name->text()))

        {

            return;

        }

    }

    setWeapons(*cDefaultAmmoStore);

}

//Save current weapons set.

void SelWeaponWidget::save()

{

    //The save() function is called by ANY change of the combo box.

    //If an entry is deleted, this code would just re-add the deleted

    //item. We use isDeleted to check if we are currently deleting to

    //prevent this.

    if (isDeleting)

        return;

    if (m_name->text() == "")

        return;

    // Don't save an default ammo scheme

    for(int i = 0; i < cDefaultAmmos.size(); ++i)

    {

        if(curWeaponsName == cDefaultAmmos[i].first)

            return;

    }

    QString state1;

    QString state2;

    QString state3;

    QString state4;

    QString stateFull;

    for(int i = 0; i < m_numItems; ++i)

    {

        twi::const_iterator it = weaponItems.find(i);

        int num = it == weaponItems.end() ? 9 : it.value()[0]->getItemsNum(); // 9 is for 'skip turn'

        state1.append(QString::number(num));

        int prob = it == weaponItems.end() ? 0 : it.value()[1]->getItemsNum();

        state2.append(QString::number(prob));

        int del = it == weaponItems.end() ? 0 : it.value()[2]->getItemsNum();

        state3.append(QString::number(del));

        int am = it == weaponItems.end() ? 0 : it.value()[3]->getItemsNum();

        state4.append(QString::number(am));

    }

    stateFull = state1 + state2 + state3 + state4;

    // Check for duplicates

    QString inputNameLower = m_name->text().toLower();

    QString curWeaponsNameLower = curWeaponsName.toLower();

    QStringList keys = wconf->keys();

    for(int i = 0; i < keys.size(); i++)

    {

        QString compName = keys[i];

        QString compNameLower = compName.toLower();

        // Don't allow same name as other weapon set, even case-insensitively.

        // This prevents some problems with saving/loading.

        if ((compNameLower == inputNameLower) && (compNameLower != curWeaponsNameLower))

        {

            // Discard changed made to current weapon scheme if there's a duplicate

            m_name->setText(curWeaponsName);

            QMessageBox deniedMsg(this);

            deniedMsg.setIcon(QMessageBox::Warning);

            deniedMsg.setWindowTitle(QMessageBox::tr("Weapons - Warning"));

            deniedMsg.setText(QMessageBox::tr("A weapon scheme with the name '%1' already exists. Changes made to the weapon scheme have been discarded.").arg(compName));

            deniedMsg.setTextFormat(Qt::PlainText);

            deniedMsg.setWindowModality(Qt::WindowModal);

            deniedMsg.exec();

            return;

        }

    }

    if (curWeaponsName != "")

    {

        // remove old entry

        wconf->remove(curWeaponsName);

    }

    wconf->insert(m_name->text(), stateFull);

    QFile file(cfgdir->absolutePath() + "/Schemes/Ammo/" + m_name->text()+ ".hwa");

    if (file.open(QIODevice::WriteOnly)) {

        QTextStream stream( &file );

        stream << stateFull << endl;

        file.close();

    }

    emit weaponsEdited(curWeaponsName, m_name->text(), stateFull);

    curWeaponsName = m_name->text();

}

int SelWeaponWidget::operator [] (unsigned int weaponIndex) const

{

    twi::const_iterator it = weaponItems.find(weaponIndex);

    return it == weaponItems.end() ? 9 : it.value()[0]->getItemsNum();

}

QString SelWeaponWidget::getWeaponsString(const QString& name) const

{

    return wconf->find(name).value();

}

void SelWeaponWidget::deleteWeaponsName()

{

    QString delWeaponsName = curWeaponsName;

    if (delWeaponsName == "") return;

    for(int i = 0; i < cDefaultAmmos.size(); i++)

    {

        if (!cDefaultAmmos[i].first.compare(delWeaponsName))

        {

            QMessageBox deniedMsg(this);

            deniedMsg.setIcon(QMessageBox::Warning);

            deniedMsg.setWindowTitle(QMessageBox::tr("Weapons - Warning"));

            deniedMsg.setText(QMessageBox::tr("Cannot delete default weapon set '%1'!").arg(cDefaultAmmos[i].first));

            deniedMsg.setTextFormat(Qt::PlainText);

            deniedMsg.setWindowModality(Qt::WindowModal);

            deniedMsg.exec();

            return;

        }

    }

    QMessageBox reallyDeleteMsg(this);

    reallyDeleteMsg.setIcon(QMessageBox::Question);

    reallyDeleteMsg.setWindowTitle(QMessageBox::tr("Weapons - Are you sure?"));

    reallyDeleteMsg.setText(QMessageBox::tr("Do you really want to delete the weapon set '%1'?").arg(delWeaponsName));

    reallyDeleteMsg.setTextFormat(Qt::PlainText);

    reallyDeleteMsg.setWindowModality(Qt::WindowModal);

    reallyDeleteMsg.setStandardButtons(QMessageBox::Ok | QMessageBox::Cancel);

    if (reallyDeleteMsg.exec() == QMessageBox::Ok)

    {

        isDeleting = true;

        wconf->remove(delWeaponsName);

        QFile(cfgdir->absolutePath() + "/Schemes/Ammo/" + curWeaponsName + ".hwa").remove();

        emit weaponsDeleted(delWeaponsName);

    }

}

void SelWeaponWidget::newWeaponsName()

{

    save();

    QString newName = tr("New");

    if(wconf->contains(newName))

    {

        //name already used -> look for an appropriate name:

        int i=2;

        while(wconf->contains(newName = tr("New (%1)").arg(i++))) ;

    }

    setWeaponsName(newName);

    wconf->insert(newName, *cEmptyAmmoStore);

    emit weaponsAdded(newName, *cEmptyAmmoStore);

}

void SelWeaponWidget::setWeaponsName(const QString& name)

{

    m_name->setText(name);

    curWeaponsName = name;

    if(name != "" && wconf->contains(name))

    {

        setWeapons(wconf->find(name).value());

    }

    else

    {

        setWeapons(*cEmptyAmmoStore);

    }

}

void SelWeaponWidget::switchWeapons(const QString& name)

{

    // Rescue old weapons set, then select new one

    save();

    setWeaponsName(name);

}

QStringList SelWeaponWidget::getWeaponNames() const

{

    return wconf->keys();

}

void SelWeaponWidget::copy()

{

    save();

    if(wconf->contains(curWeaponsName))

    {

        QString ammo = getWeaponsString(curWeaponsName);

        QString newName = tr("Copy of %1").arg(curWeaponsName);

        if(wconf->contains(newName))

        {

            //name already used -> look for an appropriate name:

            int i=2;

            while(wconf->contains(newName = tr("Copy of %1 (%2)").arg(curWeaponsName).arg(i++)));

        }

        setWeaponsName(newName);

        setWeapons(ammo);

        wconf->insert(newName, ammo);

        emit weaponsAdded(newName, ammo);

    }

}

QString SelWeaponWidget::fixWeaponSet(const QString &s)

{

    int neededLength = cDefaultAmmoStore->size() / 4;

    int thisSetLength = s.size() / 4;

    QStringList sl;

    sl

            << s.left(thisSetLength)

            << s.mid(thisSetLength, thisSetLength)

            << s.mid(thisSetLength * 2, thisSetLength)

            << s.right(thisSetLength)

               ;

    for(int i = sl.length() - 1; i >= 0; --i)

    {