#include "hand_zone.h"

#include "../../client/settings/cache_settings.h"
#include "../../interface/theme_manager.h"
#include "../board/card_drag_item.h"
#include "../board/card_item.h"
#include "../card_dimensions.h"

#include <QBrush>
#include <QList>
#include <QPainter>
#include <QPoint>
#include <QPointF>
#include <QRectF>
#include <QString>
#include <libcockatrice/game/player/player_actions.h>
#include <libcockatrice/game/player/player_info.h>
#include <libcockatrice/game/player/player_logic.h>
#include <libcockatrice/game/zones/card_zone_logic.h>
#include <libcockatrice/game/zones/hand_zone_logic.h>
#include <libcockatrice/settings/interface_settings.h>
#include <string>

class QGraphicsItem;

HandZone::HandZone(HandZoneLogic *_logic, int _zoneHeight, QGraphicsItem *parent)
    : SelectZone(_logic, parent), zoneHeight(_zoneHeight)
{
    connect(themeManager, &ThemeManager::themeChanged, this, &HandZone::updateBg);
    updateBg();
    setCacheMode(DeviceCoordinateCache);
}

void HandZone::updateBg()
{
    update();
}

void HandZone::handleDropEvent(const QList<CardDragItem *> &dragItems,
                               CardZoneLogic *startZone,
                               const QPoint &dropPoint)
{
    if (startZone == nullptr || startZone->getPlayer() == nullptr || dragItems.isEmpty()) {
        return;
    }

    QPoint point = dropPoint + scenePos().toPoint();
    int x = -1;
    if (SettingsCache::instance().userInterface().getHorizontalHand()) {
        for (x = 0; x < cardItems().size(); x++) {
            if (point.x() < cardItems().at(x)->scenePos().x()) {
                break;
            }
        }
    } else {
        bool sameZone = startZone == getLogic();
        x = calcDropIndexFromY(dropPoint.y(), !sameZone);
    }

    QList<CardMoveRequest> cards;
    cards.reserve(dragItems.size());
    for (const CardDragItem *item : dragItems) {
        cards.append(CardMoveRequest{item->getId()});
    }

    getLogic()->getPlayer()->getPlayerActions()->moveCards(startZone, getLogic(), x, -1, cards);
}

QRectF HandZone::boundingRect() const
{
    if (SettingsCache::instance().userInterface().getHorizontalHand()) {
        return QRectF(0, 0, width, CardDimensions::HEIGHT_F + 10);
    } else {
        return QRectF(0, 0, CardDimensions::WIDTH_F * 1.5, zoneHeight);
    }
}

void HandZone::paint(QPainter *painter, const QStyleOptionGraphicsItem * /*option*/, QWidget * /*widget*/)
{
    QBrush brush = themeManager->getExtraBgBrush(ThemeManager::Hand, getLogic()->getPlayer()->getZoneId());
    painter->fillRect(boundingRect(), brush);
}

void HandZone::reorganizeCards()
{
    if (!cardItems().isEmpty()) {
        const int cardCount = cardItems().size();
        if (SettingsCache::instance().userInterface().getHorizontalHand()) {
            bool leftJustified = SettingsCache::instance().userInterface().getLeftJustified();
            qreal cardWidth = cardItems().at(0)->boundingRect().width();
            const int xPadding = leftJustified ? cardWidth * 1.4 : 5;
            qreal totalWidth =
                leftJustified ? boundingRect().width() - (1 * xPadding) - 5 : boundingRect().width() - 2 * xPadding;

            if (cardCount == 1) {
                CardItem *c = cardItems().at(0);
                qreal xPosition = leftJustified ? xPadding : xPadding + (totalWidth - cardWidth) / 2;
                c->setPos(xPosition, 5);
                c->setRealZValue(0);
            } else {
                for (int i = 0; i < cardCount; i++) {
                    CardItem *c = cardItems().at(i);
                    // If the total width of the cards is smaller than the available width,
                    // the cards do not need to overlap and are displayed in the center of the area.
                    if (cardWidth * cardCount > totalWidth) {
                        c->setPos(xPadding + ((qreal)i) * (totalWidth - cardWidth) / (cardCount - 1), 5);
                    } else {
                        qreal xPosition = leftJustified ? xPadding + ((qreal)i) * cardWidth
                                                        : xPadding + ((qreal)i) * cardWidth +
                                                              (totalWidth - cardCount * cardWidth) / 2;
                        c->setPos(xPosition, 5);
                    }
                    c->setRealZValue(i);
                }
            }
        } else {
            // No clip container: hand cards should always be visible to the player.
            const auto params = buildStackParams();
            layoutCardsVertically(params);
        }
    }
    update();
}

void HandZone::sortHand(const QList<CardList::SortOption> &options)
{
    if (cardItems().isEmpty()) {
        return;
    }

    getLogic()->sortCards(options);
    reorganizeCards();
}

void HandZone::setWidth(qreal _width)
{
    if (SettingsCache::instance().userInterface().getHorizontalHand()) {
        prepareGeometryChange();
        width = _width;
        reorganizeCards();
    }
}

void HandZone::updateOrientation()
{
    prepareGeometryChange();
    reorganizeCards();
}