#!/usr/bin/python

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## Copyright (C) 2017 The Qt Company Ltd.
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## This file is part of the test suite of Qt for Python.
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'''Test cases for Q3DExtras'''

from helper import UsesQGuiApplication
import unittest

from PySide2.QtCore import(Property, QObject, QPropertyAnimation, QTimer, Signal, Slot)
from PySide2.QtGui import (QGuiApplication, QMatrix4x4, QQuaternion, QVector3D, QWindow)
from PySide2.Qt3DCore import (Qt3DCore)
from PySide2.Qt3DRender import (Qt3DRender)
from PySide2.Qt3DExtras import (Qt3DExtras)

class OrbitTransformController(QObject):
    def __init__(self, parent):
        super(OrbitTransformController, self).__init__(parent)
        self._target = None
        self._matrix = QMatrix4x4()
        self._radius = 1
        self._angle = 0

    def setTarget(self, t):
        self._target = t

    def getTarget(self):
        return self._target

    def setRadius(self, radius):
        if self._radius != radius:
            self._radius = radius
            self.updateMatrix()
            self.radiusChanged.emit()

    def getRadius(self):
        return self._radius

    def setAngle(self, angle):
        if self._angle != angle:
            self._angle = angle
            self.updateMatrix()
            self.angleChanged.emit()

    def getAngle(self):
        return self._angle

    def updateMatrix(self):
        self._matrix.setToIdentity();
        self._matrix.rotate(self._angle, QVector3D(0, 1, 0))
        self._matrix.translate(self._radius, 0, 0)
        if self._target is not None:
            self._target.setMatrix(self._matrix)

    angleChanged = Signal()
    radiusChanged = Signal()
    angle = Property(float, getAngle, setAngle, notify=angleChanged)
    radius = Property(float, getRadius, setRadius, notify=radiusChanged)

class Window(Qt3DExtras.Qt3DWindow):
    def __init__(self):
        super(Window, self).__init__()

        # Camera
        self.camera().lens().setPerspectiveProjection(45, 16 / 9, 0.1, 1000)
        self.camera().setPosition(QVector3D(0, 0, 40))
        self.camera().setViewCenter(QVector3D(0, 0, 0))

        # For camera controls
        self.createScene()
        self.camController = Qt3DExtras.QOrbitCameraController(self.rootEntity)
        self.camController.setLinearSpeed(50)
        self.camController.setLookSpeed(180)
        self.camController.setCamera(self.camera())

        self.setRootEntity(self.rootEntity)

    def createScene(self):
        # Root entity
        self.rootEntity = Qt3DCore.QEntity()

        # Material
        self.material = Qt3DExtras.QPhongMaterial(self.rootEntity)

        # Torus
        self.torusEntity = Qt3DCore.QEntity(self.rootEntity)
        self.torusMesh = Qt3DExtras.QTorusMesh()
        self.torusMesh.setRadius(5)
        self.torusMesh.setMinorRadius(1)
        self.torusMesh.setRings(100)
        self.torusMesh.setSlices(20)

        self.torusTransform = Qt3DCore.QTransform()
        self.torusTransform.setScale3D(QVector3D(1.5, 1, 0.5))
        self.torusTransform.setRotation(QQuaternion.fromAxisAndAngle(QVector3D(1, 0, 0), 45))

        self.torusEntity.addComponent(self.torusMesh)
        self.torusEntity.addComponent(self.torusTransform)
        self.torusEntity.addComponent(self.material)

        # Sphere
        self.sphereEntity = Qt3DCore.QEntity(self.rootEntity)
        self.sphereMesh = Qt3DExtras.QSphereMesh()
        self.sphereMesh.setRadius(3)

        self.sphereTransform = Qt3DCore.QTransform()
        self.controller = OrbitTransformController(self.sphereTransform)
        self.controller.setTarget(self.sphereTransform)
        self.controller.setRadius(20)

        self.sphereEntity.addComponent(self.sphereMesh)
        self.sphereEntity.addComponent(self.sphereTransform)
        self.sphereEntity.addComponent(self.material)

class Qt3DExtrasTestCase(UsesQGuiApplication):
    '''Tests related to Q3DExtras'''

    def test3DExtras(self):

        window = Window()
        window.show()
        while not window.isExposed():
            self.app.processEvents()
        QTimer.singleShot(2000, self.app.quit)
        self.app.exec_()

if __name__ == '__main__':
    unittest.main()