// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.

#include "pch.h"
#include "GraphingNumPad.xaml.h"
#include "Views/NumberPad.xaml.h"
#include "Controls/CalculatorButton.h"
#include "CalcViewModel/Common/LocalizationSettings.h"
#include "Controls/MathRichEditBox.h"

using namespace CalculatorApp;

using namespace Platform;
using namespace Windows::Foundation;
using namespace Windows::Foundation::Collections;
using namespace Windows::UI::Xaml;
using namespace Windows::UI::Xaml::Controls;
using namespace Windows::UI::Xaml::Controls::Primitives;
using namespace Windows::UI::Xaml::Data;
using namespace Windows::UI::Xaml::Input;
using namespace Windows::UI::Xaml::Media;
using namespace Windows::UI::Xaml::Navigation;

// Dictionary of the enum of the button clicked mapped to an object with the string to enter into the rich edit, and the start and end of the selection after text has been entered.
static const std::unordered_map<NumbersAndOperatorsEnum, std::tuple<Platform::String ^, int, int>> buttonOutput = {
    { NumbersAndOperatorsEnum::Sin, { L"sin()", 4, 0 } },
    { NumbersAndOperatorsEnum::Cos, { L"cos()", 4, 0 } },
    { NumbersAndOperatorsEnum::Tan, { L"tan()", 4, 0 } },
    { NumbersAndOperatorsEnum::Sec, { L"sec()", 4, 0 } },
    { NumbersAndOperatorsEnum::Csc, { L"csc()", 4, 0 } },
    { NumbersAndOperatorsEnum::Cot, { L"cot()", 4, 0 } },
    { NumbersAndOperatorsEnum::InvSin, { L"arcsin()", 7, 0 } },
    { NumbersAndOperatorsEnum::InvCos, { L"arccos()", 7, 0 } },
    { NumbersAndOperatorsEnum::InvTan, { L"arctan()", 7, 0 } },
    { NumbersAndOperatorsEnum::InvSec, { L"arcsec()", 7, 0 } },
    { NumbersAndOperatorsEnum::InvCsc, { L"arccsc()", 7, 0 } },
    { NumbersAndOperatorsEnum::InvCot, { L"arccot()", 7, 0 } },
    { NumbersAndOperatorsEnum::Sinh, { L"sinh()", 5, 0 } },
    { NumbersAndOperatorsEnum::Cosh, { L"cosh()", 5, 0 } },
    { NumbersAndOperatorsEnum::Tanh, { L"tanh()", 5, 0 } },
    { NumbersAndOperatorsEnum::Sech, { L"sech()", 5, 0 } },
    { NumbersAndOperatorsEnum::Csch, { L"csch()", 5, 0 } },
    { NumbersAndOperatorsEnum::Coth, { L"coth()", 5, 0 } },
    { NumbersAndOperatorsEnum::InvSinh, { L"arcsinh()", 8, 0 } },
    { NumbersAndOperatorsEnum::InvCosh, { L"arccosh()", 8, 0 } },
    { NumbersAndOperatorsEnum::InvTanh, { L"arctanh()", 8, 0 } },
    { NumbersAndOperatorsEnum::InvSech, { L"arcsech()", 8, 0 } },
    { NumbersAndOperatorsEnum::InvCsch, { L"arccsch()", 8, 0 } },
    { NumbersAndOperatorsEnum::InvCoth, { L"arccoth()", 8, 0 } },
    { NumbersAndOperatorsEnum::Abs, { L"abs()", 4, 0 } },
    { NumbersAndOperatorsEnum::Floor, { L"floor()", 6, 0 } },
    { NumbersAndOperatorsEnum::Ceil, { L"ceiling()", 8, 0 } },
    { NumbersAndOperatorsEnum::Pi, { L"\u03C0", 1, 0 } },
    { NumbersAndOperatorsEnum::Euler, { L"e", 1, 0 } },
    { NumbersAndOperatorsEnum::XPower2, { L"^2", 2, 0 } },
    { NumbersAndOperatorsEnum::Cube, { L"^3", 2, 0 } },
    { NumbersAndOperatorsEnum::XPowerY, { L"^", 1, 0 } },
    { NumbersAndOperatorsEnum::TenPowerX, { L"10^", 3, 0 } },
    { NumbersAndOperatorsEnum::LogBase10, { L"log()", 4, 0 } },
    { NumbersAndOperatorsEnum::LogBaseE, { L"ln()", 3, 0 } },
    { NumbersAndOperatorsEnum::Sqrt, { L"sqrt()", 5, 0 } },
    { NumbersAndOperatorsEnum::CubeRoot, { L"cbrt()", 5, 0 } },
    { NumbersAndOperatorsEnum::YRootX, { L"root(x,n)", 7, 1 } },
    { NumbersAndOperatorsEnum::TwoPowerX, { L"2^", 2, 0 } },
    { NumbersAndOperatorsEnum::LogBaseX, { L"log(b, x)", 4, 1 } },
    { NumbersAndOperatorsEnum::EPowerX, { L"e^", 4, 0 } },
    { NumbersAndOperatorsEnum::Abs, { L"abs()", 4, 0 } },
    { NumbersAndOperatorsEnum::X, { L"x", 1, 0 } },
    { NumbersAndOperatorsEnum::Y, { L"y", 1, 0 } },
    { NumbersAndOperatorsEnum::OpenParenthesis, { L"(", 1, 0 } },
    { NumbersAndOperatorsEnum::CloseParenthesis, { L")", 1, 0 } },
    { NumbersAndOperatorsEnum::Equals, { L"=", 1, 0 } },
    { NumbersAndOperatorsEnum::Divide, { L"/", 1, 0 } },
    { NumbersAndOperatorsEnum::Multiply, { L"*", 1, 0 } },
    { NumbersAndOperatorsEnum::Subtract, { L"-", 1, 0 } },
    { NumbersAndOperatorsEnum::Add, { L"+", 1, 0 } },
    { NumbersAndOperatorsEnum::Invert, { L"1/", 2, 0 } },
    { NumbersAndOperatorsEnum::Negate, { L"-", 1, 0 } },
    { NumbersAndOperatorsEnum::GreaterThan, { L">", 1, 0 } },
    { NumbersAndOperatorsEnum::GreaterThanOrEqualTo, { L"\u2265", 1, 0 } },
    { NumbersAndOperatorsEnum::LessThan, { L"<", 1, 0 } },
    { NumbersAndOperatorsEnum::LessThanOrEqualTo, { L"\u2264", 1, 0 } },
    { NumbersAndOperatorsEnum::Zero, { L"0", 1, 0 } },
    { NumbersAndOperatorsEnum::One, { L"1", 1, 0 } },
    { NumbersAndOperatorsEnum::Two, { L"2", 1, 0 } },
    { NumbersAndOperatorsEnum::Three, { L"3", 1, 0 } },
    { NumbersAndOperatorsEnum::Four, { L"4", 1, 0 } },
    { NumbersAndOperatorsEnum::Five, { L"5", 1, 0 } },
    { NumbersAndOperatorsEnum::Six, { L"6", 1, 0 } },
    { NumbersAndOperatorsEnum::Seven, { L"7", 1, 0 } },
    { NumbersAndOperatorsEnum::Eight, { L"8", 1, 0 } },
    { NumbersAndOperatorsEnum::Nine, { L"9", 1, 0 } },
    { NumbersAndOperatorsEnum::Decimal, { L".", 1, 0 } },
};

GraphingNumPad::GraphingNumPad()
{
    InitializeComponent();
    const auto& localizationSettings = CalculatorApp::Common::LocalizationSettings::GetInstance();
    DecimalSeparatorButton->Content = localizationSettings.GetDecimalSeparator();
    Num0Button->Content = localizationSettings.GetDigitSymbolFromEnUsDigit('0');
    Num1Button->Content = localizationSettings.GetDigitSymbolFromEnUsDigit('1');
    Num2Button->Content = localizationSettings.GetDigitSymbolFromEnUsDigit('2');
    Num3Button->Content = localizationSettings.GetDigitSymbolFromEnUsDigit('3');
    Num4Button->Content = localizationSettings.GetDigitSymbolFromEnUsDigit('4');
    Num5Button->Content = localizationSettings.GetDigitSymbolFromEnUsDigit('5');
    Num6Button->Content = localizationSettings.GetDigitSymbolFromEnUsDigit('6');
    Num7Button->Content = localizationSettings.GetDigitSymbolFromEnUsDigit('7');
    Num8Button->Content = localizationSettings.GetDigitSymbolFromEnUsDigit('8');
    Num9Button->Content = localizationSettings.GetDigitSymbolFromEnUsDigit('9');
}

void GraphingNumPad::ShiftButton_Check(_In_ Platform::Object ^ /*sender*/, _In_ RoutedEventArgs ^ /*e*/)
{
    SetOperatorRowVisibility();
}

void GraphingNumPad::ShiftButton_Uncheck(_In_ Platform::Object ^ sender, _In_ RoutedEventArgs ^ /*e*/)
{
    ShiftButton->IsChecked = false;
    SetOperatorRowVisibility();

    GraphingNumPad::Button_Clicked(sender, nullptr);
}

void GraphingNumPad::TrigFlyoutShift_Toggle(_In_ Platform::Object ^ /*sender*/, _In_ RoutedEventArgs ^ /*e*/)
{
    SetTrigRowVisibility();
}

void GraphingNumPad::TrigFlyoutHyp_Toggle(_In_ Platform::Object ^ /*sender*/, _In_ RoutedEventArgs ^ /*e*/)
{
    SetTrigRowVisibility();
}

void GraphingNumPad::FlyoutButton_Clicked(_In_ Platform::Object ^ sender, _In_ RoutedEventArgs ^ /*e*/)
{
    this->HypButton->IsChecked = false;
    this->TrigShiftButton->IsChecked = false;
    this->Trigflyout->Hide();
    this->FuncFlyout->Hide();
    this->InequalityFlyout->Hide();

    GraphingNumPad::Button_Clicked(sender, nullptr);
}

void GraphingNumPad::ShiftButton_IsEnabledChanged(_In_ Platform::Object ^ /*sender*/, _In_ DependencyPropertyChangedEventArgs ^ /*e*/)
{
    SetOperatorRowVisibility();
}

void GraphingNumPad::SetTrigRowVisibility()
{
    bool isShiftChecked = TrigShiftButton->IsChecked->Value;
    bool isHypeChecked = HypButton->IsChecked->Value;

    InverseHyperbolicTrigFunctions->Visibility = ::Visibility::Collapsed;
    InverseTrigFunctions->Visibility = ::Visibility::Collapsed;
    HyperbolicTrigFunctions->Visibility = ::Visibility::Collapsed;
    TrigFunctions->Visibility = ::Visibility::Collapsed;

    if (isShiftChecked && isHypeChecked)
    {
        InverseHyperbolicTrigFunctions->Visibility = ::Visibility::Visible;
    }
    else if (isShiftChecked && !isHypeChecked)
    {
        InverseTrigFunctions->Visibility = ::Visibility::Visible;
    }
    else if (!isShiftChecked && isHypeChecked)
    {
        HyperbolicTrigFunctions->Visibility = ::Visibility::Visible;
    }
    else
    {
        TrigFunctions->Visibility = ::Visibility::Visible;
    }
}

void GraphingNumPad::SetOperatorRowVisibility()
{
    ::Visibility rowVis, invRowVis;
    if (ShiftButton->IsChecked->Value)
    {
        rowVis = ::Visibility::Collapsed;
        invRowVis = ::Visibility::Visible;
    }
    else
    {
        rowVis = ::Visibility::Visible;
        invRowVis = ::Visibility::Collapsed;
    }

    Row1->Visibility = rowVis;
    InvRow1->Visibility = invRowVis;
}

void GraphingNumPad::Button_Clicked(Platform::Object ^ sender, DependencyPropertyChangedEventArgs ^ /*e*/)
{
    auto mathRichEdit = GetActiveRichEdit();
    auto button = dynamic_cast<CalculatorApp::Controls::CalculatorButton ^>(sender);
    if (mathRichEdit != nullptr && sender != nullptr)
    {
        auto id = button->ButtonId;
        auto output = buttonOutput.find(id);
        mathRichEdit->InsertText(std::get<0>(output->second), std::get<1>(output->second), std::get<2>(output->second));
    }
}

void GraphingNumPad::SubmitButton_Clicked(Platform::Object ^ /*sender*/, RoutedEventArgs ^ /*e*/)
{
    auto mathRichEdit = GetActiveRichEdit();
    if (mathRichEdit != nullptr)
    {
        mathRichEdit->SubmitEquation(CalculatorApp::Controls::EquationSubmissionSource::ENTER_KEY);
    }
}

void GraphingNumPad::ClearButton_Clicked(Platform::Object ^ /*sender*/, RoutedEventArgs ^ /*e*/)
{
    auto mathRichEdit = GetActiveRichEdit();
    if (mathRichEdit != nullptr)
    {
        mathRichEdit->MathText = L"<math xmlns=\"http://www.w3.org/1998/Math/MathML\"></math>";
        mathRichEdit->SubmitEquation(CalculatorApp::Controls::EquationSubmissionSource::PROGRAMMATIC);
    }
}

void GraphingNumPad::BackSpaceButton_Clicked(Platform::Object ^ /*sender*/, RoutedEventArgs ^ /*e*/)
{
    auto mathRichEdit = GetActiveRichEdit();
    if (mathRichEdit != nullptr)
    {
        mathRichEdit->BackSpace();
    }
}

// To avoid focus moving when the space between buttons is clicked, handle click events that make it through the keypad.
void GraphingNumPad::GraphingNumPad_PointerPressed(Platform::Object ^ /*sender*/, PointerRoutedEventArgs ^ e)
{
    e->Handled = true;
}

CalculatorApp::Controls::MathRichEditBox ^ GraphingNumPad::GetActiveRichEdit()
{
    return dynamic_cast<Controls::MathRichEditBox ^>(FocusManager::GetFocusedElement());
}

// Adding event because the ShowMode property is ignored in xaml.
void GraphingNumPad::Flyout_Opening(Platform::Object ^ sender, Platform::Object ^ /*e*/)
{
    auto flyout = dynamic_cast<Flyout ^>(sender);
    if (flyout)
    {
        flyout->ShowMode = FlyoutShowMode::Transient;
    }
}
