#include "LOGIC/Lgc_Func_Button.h"

#include "LOGIC/Lgc_Core.h"
#include <QtCore/QUrl>
#include <QtCore/QVector>
#include <QtGui/QDesktopServices>
#include <Windows.h>

namespace
{

QString Lgc_Func_Button_Func_GetUsageShortText(quint16 Usage)
{
    switch (Usage)
    {
    case 0x0056: return QStringLiteral("-");
    case 0x0057: return QStringLiteral("+");
    case 0x0059: return QStringLiteral("1");
    case 0x005A: return QStringLiteral("2");
    case 0x005B: return QStringLiteral("3");
    case 0x005C: return QStringLiteral("4");
    case 0x005D: return QStringLiteral("5");
    case 0x005E: return QStringLiteral("6");
    case 0x005F: return QStringLiteral("7");
    case 0x0060: return QStringLiteral("8");
    case 0x0061: return QStringLiteral("9");
    case 0x0062: return QStringLiteral("0");
    default:
        return Mid_Func_GetKeyboardUsageText(Usage);
    }
}

WORD Lgc_Func_Button_Func_GetWindowsVirtualKey(quint16 Usage)
{
    switch (Usage)
    {
    case 0x0056: return VK_SUBTRACT;
    case 0x0057: return VK_ADD;
    case 0x0059: return VK_NUMPAD1;
    case 0x005A: return VK_NUMPAD2;
    case 0x005B: return VK_NUMPAD3;
    case 0x005C: return VK_NUMPAD4;
    case 0x005D: return VK_NUMPAD5;
    case 0x005E: return VK_NUMPAD6;
    case 0x005F: return VK_NUMPAD7;
    case 0x0060: return VK_NUMPAD8;
    case 0x0061: return VK_NUMPAD9;
    case 0x0062: return VK_NUMPAD0;
    default:
        return 0;
    }
}

bool Lgc_Func_Button_Func_SendUnicodeText(const QString& Text)
{
    if (Text.isEmpty())
    {
        return false;
    }

    QVector<INPUT> InputList;
    InputList.reserve(Text.size() * 2);
    for (QChar Character : Text)
    {
        INPUT InputDown = {};
        InputDown.type = INPUT_KEYBOARD;
        InputDown.ki.wScan = Character.unicode();
        InputDown.ki.dwFlags = KEYEVENTF_UNICODE;
        InputList.append(InputDown);

        INPUT InputUp = InputDown;
        InputUp.ki.dwFlags = KEYEVENTF_UNICODE | KEYEVENTF_KEYUP;
        InputList.append(InputUp);
    }

    return SendInput(static_cast<UINT>(InputList.size()), InputList.data(), sizeof(INPUT)) ==
        static_cast<UINT>(InputList.size());
}

void Lgc_Func_Button_Func_RunMacroText(Lgc_Core_Struct_State* p_State, QString* p_TextStatus)
{
    const QString Text = p_State->FunctionButtonConfig.MacroText.trimmed();
    if (Text.isEmpty())
    {
        *p_TextStatus = QStringLiteral("功能键 0 未配置输出文本。");
        return;
    }

    *p_TextStatus = Lgc_Func_Button_Func_SendUnicodeText(Text)
        ? QStringLiteral("功能键 0 已输出文本：%1").arg(Text)
        : QStringLiteral("功能键 0 输出文本失败。");
}

void Lgc_Func_Button_Func_RunSwapKey(Lgc_Core_Struct_State* p_State, QString* p_TextStatus)
{
    const quint16 UsageLeft = p_State->FunctionButtonConfig.SwapUsageLeft;
    const quint16 UsageRight = p_State->FunctionButtonConfig.SwapUsageRight;
    if ((UsageLeft == 0) || (UsageRight == 0) || (UsageLeft == UsageRight))
    {
        *p_TextStatus = QStringLiteral("功能键 1 的交换配置无效。");
        return;
    }

    if (!Lgc_Core_Func_SetSwapMode(p_State, UsageLeft, UsageRight, !p_State->IsSwapModeOn))
    {
        *p_TextStatus = QStringLiteral("功能键 1 切换按键交换失败。");
        return;
    }

    *p_TextStatus = p_State->IsSwapModeOn
        ? QStringLiteral("功能键 1 已开启按键交换：%1 <-> %2")
              .arg(Lgc_Func_Button_Func_GetUsageShortText(UsageLeft))
              .arg(Lgc_Func_Button_Func_GetUsageShortText(UsageRight))
        : QStringLiteral("功能键 1 已关闭按键交换：%1 <-> %2")
              .arg(Lgc_Func_Button_Func_GetUsageShortText(UsageLeft))
              .arg(Lgc_Func_Button_Func_GetUsageShortText(UsageRight));
}

void Lgc_Func_Button_Func_RunOpenWebsite(Lgc_Core_Struct_State* p_State, QString* p_TextStatus)
{
    const QString UrlText = p_State->FunctionButtonConfig.WebsiteUrl.trimmed();
    const QUrl Url = QUrl::fromUserInput(UrlText);
    if (UrlText.isEmpty() || !Url.isValid() || Url.isEmpty())
    {
        *p_TextStatus = QStringLiteral("功能键 2 的网址配置无效。");
        return;
    }

    *p_TextStatus = QDesktopServices::openUrl(Url)
        ? QStringLiteral("功能键 2 已打开网址：%1").arg(Url.toString())
        : QStringLiteral("功能键 2 打开网址失败。");
}

} // namespace

bool Lgc_Func_Button_Func_SendUsageToWindows(quint16 Usage, bool IsPressed)
{
    const WORD VirtualKey = Lgc_Func_Button_Func_GetWindowsVirtualKey(Usage);
    if (VirtualKey == 0)
    {
        return false;
    }

    INPUT InputData = {};
    InputData.type = INPUT_KEYBOARD;
    InputData.ki.wVk = VirtualKey;
    if (!IsPressed)
    {
        InputData.ki.dwFlags = KEYEVENTF_KEYUP;
    }

    return SendInput(1, &InputData, sizeof(INPUT)) == 1;
}

bool Lgc_Func_Button_Func_HandlePressedUsage(
    Lgc_Core_Struct_State* p_State,
    quint16 Usage,
    QString* p_TextStatus)
{
    p_TextStatus->clear();
    switch (Usage)
    {
    case 0x0062:
        Lgc_Func_Button_Func_RunMacroText(p_State, p_TextStatus);
        return true;

    case 0x0059:
        Lgc_Func_Button_Func_RunSwapKey(p_State, p_TextStatus);
        return true;

    case 0x005A:
        Lgc_Func_Button_Func_RunOpenWebsite(p_State, p_TextStatus);
        return true;

    case 0x0056:
    case 0x0057:
    case 0x005B:
    case 0x005C:
    case 0x005D:
    case 0x005E:
    case 0x005F:
    case 0x0060:
    case 0x0061:
        *p_TextStatus = QStringLiteral("功能键 %1 还没有绑定具体功能。")
            .arg(Lgc_Func_Button_Func_GetUsageShortText(Usage));
        return true;

    default:
        return false;
    }
}