/*****************************************************************************************
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 * OpenSpace                                                                             *
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 * Copyright (c) 2014-2019                                                               *
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#include <modules/base/dashboard/dashboarditempropertyvalue.h>

#include <openspace/documentation/documentation.h>
#include <openspace/documentation/verifier.h>
#include <openspace/engine/globals.h>
#include <openspace/query/query.h>
#include <openspace/util/timemanager.h>
#include <ghoul/font/font.h>
#include <ghoul/font/fontmanager.h>
#include <ghoul/font/fontrenderer.h>

namespace {
    constexpr const char* KeyFontMono = "Mono";
    constexpr const float DefaultFontSize = 10.f;

    constexpr openspace::properties::Property::PropertyInfo FontNameInfo = {
        "FontName",
        "Font Name",
        "This value is the name of the font that is used. It can either refer to an "
        "internal name registered previously, or it can refer to a path that is used."
    };

    constexpr openspace::properties::Property::PropertyInfo FontSizeInfo = {
        "FontSize",
        "Font Size",
        "This value determines the size of the font that is used to render the date."
    };

    constexpr openspace::properties::Property::PropertyInfo PropertyUriInfo = {
        "URI",
        "Property URI",
        "The URI of the property that is displayed in this dashboarditem"
    };

    constexpr openspace::properties::Property::PropertyInfo DisplayStringInfo = {
        "DisplayString",
        "Display String",
        "The String that is being displayed. It must either be empty (in which case only "
        "the value itself will be displayed), or it must contain extact one instance of "
        "{}, which will be replaced with the value of the property during rendering."
    };
} // namespace

namespace openspace {

documentation::Documentation DashboardItemPropertyValue::Documentation() {
    using namespace documentation;
    return {
        "DashboardItem PropertyValue",
        "base_dashboarditem_propertyvalue",
        {
            {
                "Type",
                new StringEqualVerifier("DashboardItemPropertyValue"),
                Optional::No
            },
            {
                FontNameInfo.identifier,
                new StringVerifier,
                Optional::Yes,
                FontNameInfo.description
            },
            {
                FontSizeInfo.identifier,
                new IntVerifier,
                Optional::Yes,
                FontSizeInfo.description
            },
            {
                PropertyUriInfo.identifier,
                new StringVerifier,
                Optional::Yes,
                PropertyUriInfo.description
            },
            {
                DisplayStringInfo.identifier,
                new StringVerifier,
                Optional::Yes,
                DisplayStringInfo.description
            }
        }
    };
}

DashboardItemPropertyValue::DashboardItemPropertyValue(
                                                      const ghoul::Dictionary& dictionary)
    : DashboardItem(dictionary)
    , _fontName(FontNameInfo, KeyFontMono)
    , _fontSize(FontSizeInfo, DefaultFontSize, 6.f, 144.f, 1.f)
    , _propertyUri(PropertyUriInfo)
    , _displayString(DisplayStringInfo)
{
    documentation::testSpecificationAndThrow(
        Documentation(),
        dictionary,
        "DashboardItemPropertyValue"
    );

    if (dictionary.hasKey(FontNameInfo.identifier)) {
        _fontName = dictionary.value<std::string>(FontNameInfo.identifier);
    }
    _fontName.onChange([this](){
        _font = global::fontManager.font(_fontName, _fontSize);
    });
    addProperty(_fontName);

    if (dictionary.hasKey(FontSizeInfo.identifier)) {
        _fontSize = static_cast<float>(dictionary.value<double>(FontSizeInfo.identifier));
    }
    _fontSize.onChange([this](){
        _font = global::fontManager.font(_fontName, _fontSize);
    });
    addProperty(_fontSize);

    if (dictionary.hasKey(PropertyUriInfo.identifier)) {
        _propertyUri = dictionary.value<std::string>(PropertyUriInfo.identifier);
    }
    _propertyUri.onChange([this]() { _propertyIsDirty = true; });
    addProperty(_propertyUri);

    if (dictionary.hasKey(DisplayStringInfo.identifier)) {
        _displayString = dictionary.value<std::string>(DisplayStringInfo.identifier);
    }
    addProperty(_displayString);

    _font = global::fontManager.font(_fontName, _fontSize);
}

void DashboardItemPropertyValue::render(glm::vec2& penPosition) {
    if (_propertyIsDirty) {
        _property = openspace::property(_propertyUri);
        _propertyIsDirty = false;
    }

    if (_property) {
        std::string value;
        _property->getStringValue(value);

        penPosition.y -= _font->height();
        RenderFont(*_font, penPosition, fmt::format(_displayString.value(), value));
    }
}

glm::vec2 DashboardItemPropertyValue::size() const {
    return ghoul::fontrendering::FontRenderer::defaultRenderer().boundingBox(
        *_font,
        _displayString.value()
    ).boundingBox;
}

} // namespace openspace