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#include "qnormaldiffusemapmaterial.h"
#include "qnormaldiffusemapmaterial_p.h"

#include <Qt3DRenderer/qeffect.h>
#include <Qt3DRenderer/qtexture.h>
#include <Qt3DRenderer/qtechnique.h>
#include <Qt3DRenderer/qparameter.h>
#include <Qt3DRenderer/qshaderprogram.h>
#include <Qt3DRenderer/qrenderpass.h>
#include <Qt3DRenderer/qopenglfilter.h>

#include <QUrl>
#include <QVector3D>
#include <QVector4D>

QT_BEGIN_NAMESPACE

namespace Qt3D {

QNormalDiffuseMapMaterialPrivate::QNormalDiffuseMapMaterialPrivate(QNormalDiffuseMapMaterial *qq)
    : QMaterialPrivate(qq)
    , m_normalDiffuseEffect(new QEffect())
    , m_diffuseTexture(new QTexture2D())
    , m_normalTexture(new QTexture2D())
    , m_ambientParameter(new QParameter(QStringLiteral("ka"), QColor::fromRgbF(0.1f, 0.1f, 0.1f, 1.0f)))
    , m_diffuseParameter(new QParameter(QStringLiteral("diffuseTexture"), m_diffuseTexture))
    , m_normalParameter(new QParameter(QStringLiteral("normalTexture"), m_normalTexture))
    , m_specularParameter(new QParameter(QStringLiteral("ks"), QColor::fromRgbF(0.95f, 0.95f, 0.95f, 1.0f)))
    , m_shininessParameter(new QParameter(QStringLiteral("shininess"), 150.0f))
    , m_lightPositionParameter(new QParameter(QStringLiteral("lightPosition"), QVector4D(0.0f, 0.0f, 0.0f, 1.0f)))
    , m_lightIntensityParameter(new QParameter(QStringLiteral("lightIntensity"), QVector3D(1.0f, 1.0f, 1.0f)))
    , m_textureScaleParameter(new QParameter(QStringLiteral("texCoordScale"), 1.0f))
    , m_normalDiffuseGL3Technique(new QTechnique())
    , m_normalDiffuseGL2Technique(new QTechnique())
    , m_normalDiffuseES2Technique(new QTechnique())
    , m_normalDiffuseGL3RenderPass(new QRenderPass())
    , m_normalDiffuseGL2RenderPass(new QRenderPass())
    , m_normalDiffuseES2RenderPass(new QRenderPass())
    , m_normalDiffuseGL3Shader(new QShaderProgram())
    , m_normalDiffuseGL2ES2Shader(new QShaderProgram())
{
    m_diffuseTexture->setMagnificationFilter(QAbstractTextureProvider::Linear);
    m_diffuseTexture->setMinificationFilter(QAbstractTextureProvider::LinearMipMapLinear);
    m_diffuseTexture->setWrapMode(QTextureWrapMode(QTextureWrapMode::Repeat));
    m_diffuseTexture->setGenerateMipMaps(true);
    m_diffuseTexture->setMaximumAnisotropy(16.0f);

    m_normalTexture->setMagnificationFilter(QAbstractTextureProvider::Linear);
    m_normalTexture->setMinificationFilter(QAbstractTextureProvider::Linear);
    m_normalTexture->setWrapMode(QTextureWrapMode(QTextureWrapMode::Repeat));
    m_normalTexture->setMaximumAnisotropy(16.0f);
}

void QNormalDiffuseMapMaterialPrivate::init()
{
    m_normalDiffuseGL3Shader->setVertexShaderCode(QShaderProgram::loadSource(QUrl(QStringLiteral("qrc:/shaders/gl3/normaldiffusemap.vert"))));
    m_normalDiffuseGL3Shader->setFragmentShaderCode(QShaderProgram::loadSource(QUrl(QStringLiteral("qrc:/shaders/gl3/normaldiffusemap.frag"))));
    m_normalDiffuseGL2ES2Shader->setVertexShaderCode(QShaderProgram::loadSource(QUrl(QStringLiteral("qrc:/shaders/es2/normaldiffusemap.vert"))));
    m_normalDiffuseGL2ES2Shader->setFragmentShaderCode(QShaderProgram::loadSource(QUrl(QStringLiteral("qrc:/shaders/es2/normaldiffusemap.frag"))));

    m_normalDiffuseGL3Technique->openGLFilter()->setApi(QOpenGLFilter::Desktop);
    m_normalDiffuseGL3Technique->openGLFilter()->setMajorVersion(3);
    m_normalDiffuseGL3Technique->openGLFilter()->setMinorVersion(1);
    m_normalDiffuseGL3Technique->openGLFilter()->setProfile(QOpenGLFilter::Core);

    m_normalDiffuseGL2Technique->openGLFilter()->setApi(QOpenGLFilter::Desktop);
    m_normalDiffuseGL2Technique->openGLFilter()->setMajorVersion(2);
    m_normalDiffuseGL2Technique->openGLFilter()->setMinorVersion(0);
    m_normalDiffuseGL2Technique->openGLFilter()->setProfile(QOpenGLFilter::None);

    m_normalDiffuseES2Technique->openGLFilter()->setApi(QOpenGLFilter::ES);
    m_normalDiffuseES2Technique->openGLFilter()->setMajorVersion(2);
    m_normalDiffuseES2Technique->openGLFilter()->setMinorVersion(0);
    m_normalDiffuseES2Technique->openGLFilter()->setProfile(QOpenGLFilter::None);

    m_normalDiffuseGL3RenderPass->setShaderProgram(m_normalDiffuseGL3Shader);
    m_normalDiffuseGL2RenderPass->setShaderProgram(m_normalDiffuseGL2ES2Shader);
    m_normalDiffuseES2RenderPass->setShaderProgram(m_normalDiffuseGL2ES2Shader);

    m_normalDiffuseGL3Technique->addPass(m_normalDiffuseGL3RenderPass);
    m_normalDiffuseGL2Technique->addPass(m_normalDiffuseGL2RenderPass);
    m_normalDiffuseES2Technique->addPass(m_normalDiffuseES2RenderPass);

    m_normalDiffuseEffect->addTechnique(m_normalDiffuseGL3Technique);
    m_normalDiffuseEffect->addTechnique(m_normalDiffuseGL2Technique);
    m_normalDiffuseEffect->addTechnique(m_normalDiffuseES2Technique);

    m_normalDiffuseEffect->addParameter(m_ambientParameter);
    m_normalDiffuseEffect->addParameter(m_diffuseParameter);
    m_normalDiffuseEffect->addParameter(m_normalParameter);
    m_normalDiffuseEffect->addParameter(m_specularParameter);
    m_normalDiffuseEffect->addParameter(m_shininessParameter);
    m_normalDiffuseEffect->addParameter(m_lightPositionParameter);
    m_normalDiffuseEffect->addParameter(m_lightIntensityParameter);
    m_normalDiffuseEffect->addParameter(m_textureScaleParameter);

    static_cast<QMaterial *>(q_ptr)->setEffect(m_normalDiffuseEffect);
}

/*!
    \class Qt3D::QNormalDiffuseMapMaterial
    \brief The QNormalDiffuseMapMaterial provides a default implementation of the phong lighting and bump effect where the diffuse light component
    is read from a texture map and the normals of the mesh being rendered from a normal texture map.
    \inmodule Qt3DRender
    \since 5.5

    The specular lighting effect is based on the combination of 3 lighting components ambient, diffuse and specular.
    The relative strengths of these components is controlled by means of their reflectivity coefficients which are modelled as RGB triplets:

    \list
    \li Ambient is the color that is emitted by an object without any other light source.
    \li Diffuse is the color that is emitted for rought surface reflections with the lights.
    \li Specular is the color emitted for shiny surface reflections with the lights.
    \li The shininess of a surface is controlled by a float property.
    \endlist

    This material uses an effect with a single render pass approach and performs per fragment lighting.
    Techniques are provided for OpenGL 2, OpenGL 3 or above as well as OpenGL ES 2.
*/

/*!
    \fn Qt3D::QNormalDiffuseMapMaterial::QNormalDiffuseMapMaterial()
    Constructs a new Qt3D::QNormalDiffuseMapMaterial instance with parent object \a parent.
*/
QNormalDiffuseMapMaterial::QNormalDiffuseMapMaterial(QNode *parent)
    : QMaterial(*new QNormalDiffuseMapMaterialPrivate(this), parent)
{
    Q_D(QNormalDiffuseMapMaterial);
    QObject::connect(d->m_ambientParameter, SIGNAL(valueChanged()), this, SIGNAL(ambientChanged()));
    QObject::connect(d->m_diffuseParameter, SIGNAL(valueChanged()), this, SIGNAL(diffuseChanged()));
    QObject::connect(d->m_normalParameter, SIGNAL(valueChanged()), this, SIGNAL(normalChanged()));
    QObject::connect(d->m_specularParameter, SIGNAL(valueChanged()), this, SIGNAL(specularChanged()));
    QObject::connect(d->m_shininessParameter, SIGNAL(valueChanged()), this, SIGNAL(shininessChanged()));
    QObject::connect(d->m_textureScaleParameter, SIGNAL(valueChanged()), this, SIGNAL(textureScaleChanged()));
    d->init();
}

QNormalDiffuseMapMaterial::QNormalDiffuseMapMaterial(QNormalDiffuseMapMaterialPrivate &dd, QNode *parent)
    : QMaterial(dd, parent)
{
    Q_D(QNormalDiffuseMapMaterial);
    QObject::connect(d->m_ambientParameter, SIGNAL(valueChanged()), this, SIGNAL(ambientChanged()));
    QObject::connect(d->m_diffuseParameter, SIGNAL(valueChanged()), this, SIGNAL(diffuseChanged()));
    QObject::connect(d->m_normalParameter, SIGNAL(valueChanged()), this, SIGNAL(normalChanged()));
    QObject::connect(d->m_specularParameter, SIGNAL(valueChanged()), this, SIGNAL(specularChanged()));
    QObject::connect(d->m_shininessParameter, SIGNAL(valueChanged()), this, SIGNAL(shininessChanged()));
    QObject::connect(d->m_textureScaleParameter, SIGNAL(valueChanged()), this, SIGNAL(textureScaleChanged()));
    d->init();
}

QNormalDiffuseMapMaterial::~QNormalDiffuseMapMaterial()
{
}

/*!
    \fn Qt3D::QNormalDiffuseMapMaterial::ambient() const
    \return the current QColor ambient value.
 */
QColor QNormalDiffuseMapMaterial::ambient() const
{
    Q_D(const QNormalDiffuseMapMaterial);
    return d->m_ambientParameter->value().value<QColor>();
}

/*!
    \fn Qt3D::QNormalDiffuseMapMaterial::specular() const
    \return the current QColor specular value.
 */
QColor QNormalDiffuseMapMaterial::specular() const
{
    Q_D(const QNormalDiffuseMapMaterial);
    return d->m_specularParameter->value().value<QColor>();
}

/*!
    \fn Qt3D::QNormalDiffuseMapMaterial::diffuse() const
    \return the current diffuse map texture.
    \b {Note:} By default the diffuse texture has a linear
    magnification filter, a linear mipmap linear minification filter,
    the wrap mode is repeat, the maximum anisotropy is set to 16.0
    and mipmapping is enabled.
 */
QAbstractTextureProvider *QNormalDiffuseMapMaterial::diffuse() const
{
    Q_D(const QNormalDiffuseMapMaterial);
    return d->m_diffuseParameter->value().value<QAbstractTextureProvider *>();
}

/*!
    \fn Qt3D::QNormalDiffuseMapMaterial::normal() const
    \return the current normal map texture.
    \b {Note:} By default the normal texture has linear minification
    and magnification filters, the wrap mode is repeat and maximum anisotropy
    is set to 16.0.
 */
QAbstractTextureProvider *QNormalDiffuseMapMaterial::normal() const
{
    Q_D(const QNormalDiffuseMapMaterial);
    return d->m_normalParameter->value().value<QAbstractTextureProvider *>();
}

/*!
    \fn Qt3D::QNormalDiffuseMapMaterial::shininess() const
    \return the current shininess as a float value.
 */
float QNormalDiffuseMapMaterial::shininess() const
{
    Q_D(const QNormalDiffuseMapMaterial);
    return d->m_shininessParameter->value().toFloat();
}

/*!
    \fn Qt3D::QNormalDiffuseMapMaterial::textureScale() const
    \return the current texture scale.
 */
float QNormalDiffuseMapMaterial::textureScale() const
{
    Q_D(const QNormalDiffuseMapMaterial);
    return d->m_textureScaleParameter->value().toFloat();
}

/*!
    \fn Qt3D::QNormalDiffuseMapMaterial::setAmbient(const QColor &ambient)
    Sets the current ambient color to \a ambient
 */
void QNormalDiffuseMapMaterial::setAmbient(const QColor &ambient)
{
    Q_D(QNormalDiffuseMapMaterial);
    d->m_ambientParameter->setValue(ambient);
}

/*!
    \fn Qt3D::QNormalDiffuseMapMaterial::setSpecular(const QColor &specular)
    Sets the current specular color to \a specular.
 */
void QNormalDiffuseMapMaterial::setSpecular(const QColor &specular)
{
    Q_D(QNormalDiffuseMapMaterial);
    d->m_specularParameter->setValue(specular);
}

/*!
    \fn Qt3D::QNormalDiffuseMapMaterial::setDiffuse(QTexture *diffuse)
    Sets the current diffuse map to \a diffuse.
 */
void QNormalDiffuseMapMaterial::setDiffuse(QAbstractTextureProvider *diffuse)
{
    Q_D(QNormalDiffuseMapMaterial);
    d->m_diffuseParameter->setValue(QVariant::fromValue(diffuse));
}

/*!
    \fn Qt3D::QNormalDiffuseMapMaterial::setNormal(QTexture *normal)
    Sets the current normal map to \a normal.
 */
void QNormalDiffuseMapMaterial::setNormal(QAbstractTextureProvider *normal)
{
    Q_D(QNormalDiffuseMapMaterial);
    d->m_normalParameter->setValue(QVariant::fromValue(normal));
}

/*!
    \fn Qt3D::QNormalDiffuseMapMaterial::setShininess(float shininess)
    Sets the current shininess value to \a shininess.
 */
void QNormalDiffuseMapMaterial::setShininess(float shininess)
{
    Q_D(QNormalDiffuseMapMaterial);
    d->m_shininessParameter->setValue(shininess);
}

/*!
    \fn Qt3D::QNormalDiffuseMapMaterial::setTextureScale(float textureScale)
    Sets the current texture scale to \a textureScale.
 */
void QNormalDiffuseMapMaterial::setTextureScale(float textureScale)
{
    Q_D(QNormalDiffuseMapMaterial);
    d->m_textureScaleParameter->setValue(textureScale);
}

} // Qt3D

QT_END_NAMESPACE