//  SPDX-License-Identifier: MIT
//
//  EmulationStation Desktop Edition
//  GuiMsgBox.cpp
//
//  Popup message dialog with a notification text and a choice of one,
//  two or three buttons.
//

#include "guis/GuiMsgBox.h"

#include "components/ButtonComponent.h"
#include "components/MenuComponent.h"

#define HORIZONTAL_PADDING_PX 20

GuiMsgBox::GuiMsgBox(Window* window, const HelpStyle& helpstyle, const std::string& text,
        const std::string& name1, const std::function<void()>& func1,
        const std::string& name2, const std::function<void()>& func2,
        const std::string& name3, const std::function<void()>& func3,
        bool disableBackButton)
        : GuiComponent(window),
        mHelpStyle(helpstyle),
        mBackground(window, ":/graphics/frame.png"),
        mGrid(window, Vector2i(1, 2)),
        mDisableBackButton(disableBackButton)
{
    float width = Renderer::getScreenWidth() * 0.6f;  // Max width.
    float minWidth = Renderer::getScreenWidth() * 0.3f; // Minimum width.

    mMsg = std::make_shared<TextComponent>(mWindow, text, Font::get(FONT_SIZE_MEDIUM),
            0x777777FF, ALIGN_CENTER);
    mGrid.setEntry(mMsg, Vector2i(0, 0), false, false);

    // Create the buttons.
    mButtons.push_back(std::make_shared<ButtonComponent>
            (mWindow, name1, name1, std::bind(&GuiMsgBox::deleteMeAndCall, this, func1)));
    if (!name2.empty())
        mButtons.push_back(std::make_shared<ButtonComponent>
            (mWindow, name2, name3, std::bind(&GuiMsgBox::deleteMeAndCall, this, func2)));
    if (!name3.empty())
        mButtons.push_back(std::make_shared<ButtonComponent>
            (mWindow, name3, name3, std::bind(&GuiMsgBox::deleteMeAndCall, this, func3)));

    // Set accelerator automatically (button to press when "b" is pressed).
    if (mButtons.size() == 1) {
        mAcceleratorFunc = mButtons.front()->getPressedFunc();
    }
    else {
        for (auto it = mButtons.cbegin(); it != mButtons.cend(); it++) {
            if (Utils::String::toUpper((*it)->getText()) == "OK" ||
                    Utils::String::toUpper((*it)->getText()) == "NO") {
                mAcceleratorFunc = (*it)->getPressedFunc();
                break;
            }
        }
    }

    // Put the buttons into a ComponentGrid.
    mButtonGrid = makeButtonGrid(mWindow, mButtons);
    mGrid.setEntry(mButtonGrid, Vector2i(0, 1), true, false, Vector2i(1, 1), GridFlags::BORDER_TOP);

    // Decide final width.
    if (mMsg->getSize().x() < width && mButtonGrid->getSize().x() < width) {
        // mMsg and buttons are narrower than width.
        width = Math::max(mButtonGrid->getSize().x(), mMsg->getSize().x());
        width = Math::max(width, minWidth);
    }

    // Now that we know width, we can find height.
    mMsg->setSize(width, 0); // mMsg->getSize.y() now returns the proper length.
    const float msgHeight = Math::max(Font::get(FONT_SIZE_LARGE)->getHeight(),
            mMsg->getSize().y()*1.225f);
    setSize(width + HORIZONTAL_PADDING_PX*2, msgHeight + mButtonGrid->getSize().y());

    // Center for good measure.
    setPosition((Renderer::getScreenWidth() - mSize.x()) / 2.0f,
            (Renderer::getScreenHeight() - mSize.y()) / 2.0f);

    addChild(&mBackground);
    addChild(&mGrid);
}

bool GuiMsgBox::input(InputConfig* config, Input input)
{
    // Special case for when GuiMsgBox comes up to report errors before
    // anything has been configured.
    if (config->getDeviceId() == DEVICE_KEYBOARD && !config->isConfigured() && input.value &&
        (input.id == SDLK_RETURN || input.id == SDLK_ESCAPE || input.id == SDLK_SPACE)) {
        mAcceleratorFunc();
        return true;
    }

    if (!mDisableBackButton) {
        if (mAcceleratorFunc && config->isMappedTo("b", input) && input.value != 0) {
            mAcceleratorFunc();
            return true;
        }
    }

    return GuiComponent::input(config, input);
}

void GuiMsgBox::onSizeChanged()
{
    mGrid.setSize(mSize);
    mGrid.setRowHeightPerc(1, mButtonGrid->getSize().y() / mSize.y());

    // Update messagebox size.
    mMsg->setSize(mSize.x() - HORIZONTAL_PADDING_PX*2, mGrid.getRowHeight(0));
    mGrid.onSizeChanged();

    mBackground.fitTo(mSize, Vector3f::Zero(), Vector2f(-32, -32));
}

void GuiMsgBox::deleteMeAndCall(const std::function<void()>& func)
{
    auto funcCopy = func;
    delete this;

    if (funcCopy)
        funcCopy();
}

std::vector<HelpPrompt> GuiMsgBox::getHelpPrompts()
{
    std::vector<HelpPrompt> prompts = mGrid.getHelpPrompts();

    // If there is only one button, then remove the "Choose" help symbol
    // as there is no way to make a choice.
    if (mButtons.size() == 1)
        prompts.pop_back();

    if (!mDisableBackButton)
        prompts.push_back(HelpPrompt("b", "Back"));

    return prompts;
}