#pragma once
#include <QDebug>
#include <QHBoxLayout>
#include <QKeyEvent>
#include <QLineEdit>
#include <QListWidget>
#include <QListWidgetItem>
#include <QPushButton>
#include <QScroller>
#include <QShowEvent>
#include <QVBoxLayout>
#include <QWidget>
#include <utility>
#include "Core/Base/global_include.h"
#include "Input_Core.h"
namespace renderive {
class Virtual_Keyboard;
class Key_Button : public QPushButton {
public:
    explicit Key_Button();
    Qt::Key key;
    QString text;
    Qt::KeyboardModifiers modifiers = Qt::NoModifier;
    bool is_text = false;
    Virtual_Keyboard* virtual_keyboard{};
};
class Virtual_Keyboard : public QWidget, public Psc::Singleton<Virtual_Keyboard> {
public:
    explicit Virtual_Keyboard(QWidget* parent = nullptr);
    ~Virtual_Keyboard() override;
    bool eventFilter(QObject* watched, QEvent* event) override;
    void set_edit(QWidget* edit);
    void get_candidate_list(QString spell);
    bool is_single_char(QString spell);
    void handle_Key_Press(Key_Button* button);
    bool moving = false;
    QPoint start_pos, start_global_pos;
    void mousePressEvent(QMouseEvent* event) override;
    void mouseMoveEvent(QMouseEvent* event) override;
    void mouseReleaseEvent(QMouseEvent* event) override;
public:
    enum State {
        English,
        Chinese,
    } state = English;
    QWidget* input_widget{};
    Input_Core* core;
    Key_Button*
    create_text_key(const QString& show_text, const QString& text, Qt::Key key, Qt::KeyboardModifiers modifiers,
                    QHBoxLayout* layout) {
        auto t = create_text_key_button(text, key, layout, true);
        t->setText(show_text);
        t->modifiers = modifiers;
        return t;
    }
    QSizePolicy size_policy;
    Key_Button* create_text_key_button(const QString& text, Qt::Key key, QHBoxLayout* layout, bool is_text = true) {
        auto ret = new Key_Button;
        ret->setObjectName(text);
        ret->key = key;
        ret->text = text;
        ret->is_text = is_text;
        layout->addWidget(ret);
        ret->setSizePolicy(size_policy);
        ret->virtual_keyboard = this;
        return ret;
    }
    QWidget *english, *chinese, *symbol, *cur_widget{};
    QVBoxLayout* main_layout;
    QLineEdit* edit{};
    QListWidget* list_widget{};
    QWidget* create_chinese() {
        auto ret = new QWidget;
        auto main_layout = new QVBoxLayout(ret);
        QFont font;
        font.setFamily("黑体"); // 设置字体为黑体
        font.setPointSize(16); // 设置字体大小为 16pt
        QSizePolicy size_policy2(QSizePolicy::Preferred, QSizePolicy::Preferred);
        edit = new QLineEdit;
        edit->setSizePolicy(size_policy2);
        list_widget = new QListWidget;
        list_widget->setSizePolicy(size_policy2);
        edit->setFont(font);
        list_widget->setFont(font);
        int line_height = QFontMetrics(font).lineSpacing() + 8;
        edit->setFixedHeight(line_height);
        list_widget->setFixedHeight(line_height);
        auto line0 = new QHBoxLayout;
        line0->addWidget(edit, 3);
        line0->addWidget(list_widget, 5);
        main_layout->addLayout(line0);
        auto line1 = new QHBoxLayout();
        main_layout->addLayout(line1, 5);
        create_text_key("q", "q", Qt::Key_Q, Qt::NoModifier, line1);
        create_text_key("w", "w", Qt::Key_W, Qt::NoModifier, line1);
        create_text_key("e", "e", Qt::Key_E, Qt::NoModifier, line1);
        create_text_key("r", "r", Qt::Key_R, Qt::NoModifier, line1);
        create_text_key("t", "t", Qt::Key_T, Qt::NoModifier, line1);
        create_text_key("y", "y", Qt::Key_Y, Qt::NoModifier, line1);
        create_text_key("u", "u", Qt::Key_U, Qt::NoModifier, line1);
        create_text_key("i", "i", Qt::Key_I, Qt::NoModifier, line1);
        create_text_key("o", "o", Qt::Key_O, Qt::NoModifier, line1);
        create_text_key("p", "p", Qt::Key_P, Qt::NoModifier, line1);
        auto line2 = new QHBoxLayout();
        main_layout->addLayout(line2, 5);
        create_text_key("a", "a", Qt::Key_A, Qt::NoModifier, line2);
        create_text_key("s", "s", Qt::Key_S, Qt::NoModifier, line2);
        create_text_key("d", "d", Qt::Key_D, Qt::NoModifier, line2);
        create_text_key("f", "f", Qt::Key_F, Qt::NoModifier, line2);
        create_text_key("g", "g", Qt::Key_G, Qt::NoModifier, line2);
        create_text_key("h", "h", Qt::Key_H, Qt::NoModifier, line2);
        create_text_key("j", "j", Qt::Key_J, Qt::NoModifier, line2);
        create_text_key("k", "k", Qt::Key_K, Qt::NoModifier, line2);
        create_text_key("l", "l", Qt::Key_L, Qt::NoModifier, line2);
        auto line3 = new QHBoxLayout();
        main_layout->addLayout(line3, 5);
        create_text_key("z", "z", Qt::Key_Z, Qt::NoModifier, line3);
        create_text_key("x", "x", Qt::Key_X, Qt::NoModifier, line3);
        create_text_key("c", "c", Qt::Key_C, Qt::NoModifier, line3);
        create_text_key("v", "v", Qt::Key_V, Qt::NoModifier, line3);
        create_text_key("b", "b", Qt::Key_B, Qt::NoModifier, line3);
        create_text_key("n", "n", Qt::Key_N, Qt::NoModifier, line3);
        create_text_key("m", "m", Qt::Key_M, Qt::NoModifier, line3);
        create_text_key("Backspace", "\b", Qt::Key_Backspace, Qt::NoModifier, line3);
        auto line4 = new QHBoxLayout();
        main_layout->addLayout(line4, 5);
        auto change_to_123 = new QPushButton;
        line4->addWidget(change_to_123, 1);
        change_to_123->setSizePolicy(size_policy);
        change_to_123->setText("?123");
        connect(change_to_123, &Key_Button::clicked, [this, change_to_123]() {
            cur_widget->hide();
            symbol->show();
        });
        auto change_to_english = new QPushButton;
        change_to_english->setText("En");
        change_to_english->setSizePolicy(size_policy);
        line4->addWidget(change_to_english, 1);
        connect(change_to_english, &Key_Button::clicked, [&, change_to_english]() {
            cur_widget->hide();
            english->show();
            cur_widget = english;
            state = English;
        });
        auto space = create_text_key(" ", " ", Qt::Key_Space, Qt::NoModifier, line4);
        QSizePolicy size_policy1(QSizePolicy::Preferred, QSizePolicy::Preferred);
        size_policy1.setHorizontalStretch(5);
        space->setSizePolicy(size_policy1);
        auto hide = new QPushButton;
        hide->setText("隐藏");
        hide->setSizePolicy(size_policy);
        line4->addWidget(hide, 1);
        connect(hide, &Key_Button::clicked, this, &QWidget::hide);
        return ret;
    }
    QWidget* create_english() {
        auto ret = new QWidget;
        auto main_layout = new QVBoxLayout(ret);
        auto line1 = new QHBoxLayout();
        main_layout->addLayout(line1);
        create_text_key("q", "q", Qt::Key_Q, Qt::NoModifier, line1);
        create_text_key("w", "w", Qt::Key_W, Qt::NoModifier, line1);
        create_text_key("e", "e", Qt::Key_E, Qt::NoModifier, line1);
        create_text_key("r", "r", Qt::Key_R, Qt::NoModifier, line1);
        create_text_key("t", "t", Qt::Key_T, Qt::NoModifier, line1);
        create_text_key("y", "y", Qt::Key_Y, Qt::NoModifier, line1);
        create_text_key("u", "u", Qt::Key_U, Qt::NoModifier, line1);
        create_text_key("i", "i", Qt::Key_I, Qt::NoModifier, line1);
        create_text_key("o", "o", Qt::Key_O, Qt::NoModifier, line1);
        create_text_key("p", "p", Qt::Key_P, Qt::NoModifier, line1);
        auto line2 = new QHBoxLayout();
        main_layout->addLayout(line2);
        create_text_key("a", "a", Qt::Key_A, Qt::NoModifier, line2);
        create_text_key("s", "s", Qt::Key_S, Qt::NoModifier, line2);
        create_text_key("d", "d", Qt::Key_D, Qt::NoModifier, line2);
        create_text_key("f", "f", Qt::Key_F, Qt::NoModifier, line2);
        create_text_key("g", "g", Qt::Key_G, Qt::NoModifier, line2);
        create_text_key("h", "h", Qt::Key_H, Qt::NoModifier, line2);
        create_text_key("j", "j", Qt::Key_J, Qt::NoModifier, line2);
        create_text_key("k", "k", Qt::Key_K, Qt::NoModifier, line2);
        create_text_key("l", "l", Qt::Key_L, Qt::NoModifier, line2);
        auto line3 = new QHBoxLayout();
        main_layout->addLayout(line3);
        auto caps_lock = new QPushButton;
        line3->addWidget(caps_lock, 1);
        caps_lock->setSizePolicy(size_policy);
        caps_lock->setText("大写");
        connect(caps_lock, &QPushButton::clicked, [this, caps_lock]() {
            if (caps_lock->text() == "大写") {
                for (auto child : english->findChildren<Key_Button*>()) {
                    if ((child->text.size() == 1) && child->text.isLower()) {
                        QString&& text = child->text.toUpper();
                        child->setText(text);
                        child->text = text;
                    }
                }
                caps_lock->setText("小写");
            }
            else {
                for (auto child : english->findChildren<Key_Button*>()) {
                    if ((child->text.size() == 1) && child->text.isUpper()) {
                        QString&& text = child->text.toLower();
                        child->setText(text);
                        child->text = text;
                    }
                }
                caps_lock->setText("大写");
            }
        });
        create_text_key("z", "z", Qt::Key_Z, Qt::NoModifier, line3);
        create_text_key("x", "x", Qt::Key_X, Qt::NoModifier, line3);
        create_text_key("c", "c", Qt::Key_C, Qt::NoModifier, line3);
        create_text_key("v", "v", Qt::Key_V, Qt::NoModifier, line3);
        create_text_key("b", "b", Qt::Key_B, Qt::NoModifier, line3);
        create_text_key("n", "n", Qt::Key_N, Qt::NoModifier, line3);
        create_text_key("m", "m", Qt::Key_M, Qt::NoModifier, line3);
        create_text_key("Backspace", "\b", Qt::Key_Backspace, Qt::NoModifier, line3);
        auto line4 = new QHBoxLayout();
        main_layout->addLayout(line4);
        auto change_to_123 = new QPushButton;
        line4->addWidget(change_to_123, 1);
        change_to_123->setSizePolicy(size_policy);
        change_to_123->setText("?123");
        connect(change_to_123, &Key_Button::clicked, [this, change_to_123]() {
            cur_widget->hide();
            symbol->show();
        });
        auto change_to_ch = new QPushButton;
        change_to_ch->setText("中文");
        change_to_ch->setSizePolicy(size_policy);
        line4->addWidget(change_to_ch, 1);
        connect(change_to_ch, &Key_Button::clicked, [&]() {
            cur_widget->hide();
            chinese->show();
            cur_widget = chinese;
            state = Chinese;
        });
        auto space = create_text_key(" ", " ", Qt::Key_Space, Qt::NoModifier, line4);
        QSizePolicy size_policy1(QSizePolicy::Preferred, QSizePolicy::Preferred);
        size_policy1.setHorizontalStretch(5);
        space->setSizePolicy(size_policy1);
        auto hide = new QPushButton;
        hide->setText("隐藏");
        hide->setSizePolicy(size_policy);
        line4->addWidget(hide, 1);
        connect(hide, &Key_Button::clicked, this, &QWidget::hide);
        return ret;
    }
    QWidget* create_symbol() {
        auto ret = new QWidget;
        auto main_layout = new QVBoxLayout(ret);
        auto line1 = new QHBoxLayout();
        main_layout->addLayout(line1);
        create_text_key("1", "1", Qt::Key_1, Qt::NoModifier, line1);
        create_text_key("2", "2", Qt::Key_2, Qt::NoModifier, line1);
        create_text_key("3", "3", Qt::Key_3, Qt::NoModifier, line1);
        create_text_key("4", "4", Qt::Key_4, Qt::NoModifier, line1);
        create_text_key("5", "5", Qt::Key_5, Qt::NoModifier, line1);
        create_text_key("6", "6", Qt::Key_6, Qt::NoModifier, line1);
        create_text_key("7", "7", Qt::Key_7, Qt::NoModifier, line1);
        create_text_key("8", "8", Qt::Key_8, Qt::NoModifier, line1);
        create_text_key("9", "9", Qt::Key_9, Qt::NoModifier, line1);
        create_text_key("0", "0", Qt::Key_0, Qt::NoModifier, line1);
        auto line2 = new QHBoxLayout();
        main_layout->addLayout(line2);
        create_text_key("!", "!", Qt::Key_1, Qt::ShiftModifier, line2);
        create_text_key("@", "@", Qt::Key_2, Qt::ShiftModifier, line2);
        create_text_key("#", "#", Qt::Key_3, Qt::ShiftModifier, line2);
        create_text_key("%", "%", Qt::Key_5, Qt::ShiftModifier, line2);
        create_text_key("&&", "&", Qt::Key_7, Qt::ShiftModifier, line2);
        create_text_key("*", "*", Qt::Key_8, Qt::ShiftModifier, line2);
        create_text_key("(", "(", Qt::Key_9, Qt::ShiftModifier, line2);
        create_text_key(")", ")", Qt::Key_0, Qt::ShiftModifier, line2);
        create_text_key("-", "-", Qt::Key_Minus, Qt::NoModifier, line2);
        auto line3 = new QHBoxLayout();
        main_layout->addLayout(line3);
        create_text_key("_", "_", Qt::Key_Underscore, Qt::ShiftModifier, line3);
        create_text_key(":", ":", Qt::Key_Colon, Qt::ShiftModifier, line3);
        create_text_key(";", ";", Qt::Key_Semicolon, Qt::NoModifier, line3);
        create_text_key("/", "/", Qt::Key_Slash, Qt::NoModifier, line3);
        create_text_key(".", ".", Qt::Key_Period, Qt::NoModifier, line3);
        create_text_key(",", ",", Qt::Key_Comma, Qt::NoModifier, line3);
        create_text_key("?", "?", Qt::Key_Question, Qt::ShiftModifier, line3);
        create_text_key("Backspace", "\b", Qt::Key_Backspace, Qt::NoModifier, line3);
        auto line4 = new QHBoxLayout();
        main_layout->addLayout(line4);
        auto back = new QPushButton;
        back->setText("返回");
        back->setSizePolicy(size_policy);
        line4->addWidget(back, 1);
        connect(back, &Key_Button::clicked, [&]() {
            symbol->hide();
            cur_widget->show();
        });
        auto space = create_text_key(" ", " ", Qt::Key_Space, Qt::NoModifier, line4);
        QSizePolicy size_policy1(QSizePolicy::Preferred, QSizePolicy::Preferred);
        size_policy1.setHorizontalStretch(5);
        space->setSizePolicy(size_policy1);
        auto hide = new QPushButton;
        hide->setText("隐藏");
        hide->setSizePolicy(size_policy);
        line4->addWidget(hide, 1);
        connect(hide, &Key_Button::clicked, this, &QWidget::hide);
        return ret;
    }
};
} // namespace renderive