/*
 * EGLViewlinux.cpp
 *
 *  Created on: Aug 8, 2011
 *      Author: laschweinski
 */

#include "CCEGLView.h"
#include "CCGL.h"
#include "ccMacros.h"
#include "CCDirector.h"
#include "event_dispatcher/CCTouch.h"
#include "text_input_node/CCIMEDispatcher.h"
#include "event_dispatcher/CCEventDispatcher.h"
#include "event_dispatcher/CCKeyboardEvent.h"
#include <unistd.h>

NS_CC_BEGIN


static std::map<int, KeyboardEvent::KeyCode> g_keyCodeMap = {
    /* The unknown key */
    { GLFW_KEY_UNKNOWN         , KeyboardEvent::KeyCode::KEY_NONE          },
    
    /* Printable keys */
    { GLFW_KEY_SPACE           , KeyboardEvent::KeyCode::KEY_SPACE         },
    { GLFW_KEY_APOSTROPHE      , KeyboardEvent::KeyCode::KEY_APOSTROPHE    },
    { GLFW_KEY_COMMA           , KeyboardEvent::KeyCode::KEY_COMMA         },
    { GLFW_KEY_MINUS           , KeyboardEvent::KeyCode::KEY_MINUS         },
    { GLFW_KEY_PERIOD          , KeyboardEvent::KeyCode::KEY_PERIOD        },
    { GLFW_KEY_SLASH           , KeyboardEvent::KeyCode::KEY_SLASH         },
    { GLFW_KEY_0               , KeyboardEvent::KeyCode::KEY_0             },
    { GLFW_KEY_1               , KeyboardEvent::KeyCode::KEY_1             },
    { GLFW_KEY_2               , KeyboardEvent::KeyCode::KEY_2             },
    { GLFW_KEY_3               , KeyboardEvent::KeyCode::KEY_3             },
    { GLFW_KEY_4               , KeyboardEvent::KeyCode::KEY_4             },
    { GLFW_KEY_5               , KeyboardEvent::KeyCode::KEY_5             },
    { GLFW_KEY_6               , KeyboardEvent::KeyCode::KEY_6             },
    { GLFW_KEY_7               , KeyboardEvent::KeyCode::KEY_7             },
    { GLFW_KEY_8               , KeyboardEvent::KeyCode::KEY_8             },
    { GLFW_KEY_9               , KeyboardEvent::KeyCode::KEY_9             },
    { GLFW_KEY_SEMICOLON       , KeyboardEvent::KeyCode::KEY_SEMICOLON     },
    { GLFW_KEY_EQUAL           , KeyboardEvent::KeyCode::KEY_EQUAL         },
    { GLFW_KEY_A               , KeyboardEvent::KeyCode::KEY_A             },
    { GLFW_KEY_B               , KeyboardEvent::KeyCode::KEY_B             },
    { GLFW_KEY_C               , KeyboardEvent::KeyCode::KEY_C             },
    { GLFW_KEY_D               , KeyboardEvent::KeyCode::KEY_D             },
    { GLFW_KEY_E               , KeyboardEvent::KeyCode::KEY_E             },
    { GLFW_KEY_F               , KeyboardEvent::KeyCode::KEY_F             },
    { GLFW_KEY_G               , KeyboardEvent::KeyCode::KEY_G             },
    { GLFW_KEY_H               , KeyboardEvent::KeyCode::KEY_H             },
    { GLFW_KEY_I               , KeyboardEvent::KeyCode::KEY_I             },
    { GLFW_KEY_J               , KeyboardEvent::KeyCode::KEY_J             },
    { GLFW_KEY_K               , KeyboardEvent::KeyCode::KEY_K             },
    { GLFW_KEY_L               , KeyboardEvent::KeyCode::KEY_L             },
    { GLFW_KEY_M               , KeyboardEvent::KeyCode::KEY_M             },
    { GLFW_KEY_N               , KeyboardEvent::KeyCode::KEY_N             },
    { GLFW_KEY_O               , KeyboardEvent::KeyCode::KEY_O             },
    { GLFW_KEY_P               , KeyboardEvent::KeyCode::KEY_P             },
    { GLFW_KEY_Q               , KeyboardEvent::KeyCode::KEY_Q             },
    { GLFW_KEY_R               , KeyboardEvent::KeyCode::KEY_R             },
    { GLFW_KEY_S               , KeyboardEvent::KeyCode::KEY_S             },
    { GLFW_KEY_T               , KeyboardEvent::KeyCode::KEY_T             },
    { GLFW_KEY_U               , KeyboardEvent::KeyCode::KEY_U             },
    { GLFW_KEY_V               , KeyboardEvent::KeyCode::KEY_V             },
    { GLFW_KEY_W               , KeyboardEvent::KeyCode::KEY_W             },
    { GLFW_KEY_X               , KeyboardEvent::KeyCode::KEY_X             },
    { GLFW_KEY_Y               , KeyboardEvent::KeyCode::KEY_Y             },
    { GLFW_KEY_Z               , KeyboardEvent::KeyCode::KEY_Z             },
    { GLFW_KEY_LEFT_BRACKET    , KeyboardEvent::KeyCode::KEY_LEFT_BRACKET  },
    { GLFW_KEY_BACKSLASH       , KeyboardEvent::KeyCode::KEY_BACK_SLASH    },
    { GLFW_KEY_RIGHT_BRACKET   , KeyboardEvent::KeyCode::KEY_RIGHT_BRACKET },
    { GLFW_KEY_GRAVE_ACCENT    , KeyboardEvent::KeyCode::KEY_GRAVE         },
    { GLFW_KEY_WORLD_1         , KeyboardEvent::KeyCode::KEY_GRAVE         },
    { GLFW_KEY_WORLD_2         , KeyboardEvent::KeyCode::KEY_NONE          },
    
    /* Function keys */
    { GLFW_KEY_ESCAPE          , KeyboardEvent::KeyCode::KEY_ESCAPE        },
    { GLFW_KEY_ENTER           , KeyboardEvent::KeyCode::KEY_KP_ENTER      },
    { GLFW_KEY_TAB             , KeyboardEvent::KeyCode::KEY_TAB           },
    { GLFW_KEY_BACKSPACE       , KeyboardEvent::KeyCode::KEY_BACKSPACE     },
    { GLFW_KEY_INSERT          , KeyboardEvent::KeyCode::KEY_INSERT        },
    { GLFW_KEY_DELETE          , KeyboardEvent::KeyCode::KEY_DELETE        },
    { GLFW_KEY_RIGHT           , KeyboardEvent::KeyCode::KEY_RIGHT_ARROW   },
    { GLFW_KEY_LEFT            , KeyboardEvent::KeyCode::KEY_LEFT_ARROW    },
    { GLFW_KEY_DOWN            , KeyboardEvent::KeyCode::KEY_DOWN_ARROW    },
    { GLFW_KEY_UP              , KeyboardEvent::KeyCode::KEY_UP_ARROW      },
    { GLFW_KEY_PAGE_UP         , KeyboardEvent::KeyCode::KEY_KP_PG_UP      },
    { GLFW_KEY_PAGE_DOWN       , KeyboardEvent::KeyCode::KEY_KP_PG_DOWN    },
    { GLFW_KEY_HOME            , KeyboardEvent::KeyCode::KEY_KP_HOME       },
    { GLFW_KEY_END             , KeyboardEvent::KeyCode::KEY_END           },
    { GLFW_KEY_CAPS_LOCK       , KeyboardEvent::KeyCode::KEY_CAPS_LOCK     },
    { GLFW_KEY_SCROLL_LOCK     , KeyboardEvent::KeyCode::KEY_SCROLL_LOCK   },
    { GLFW_KEY_NUM_LOCK        , KeyboardEvent::KeyCode::KEY_NUM_LOCK      },
    { GLFW_KEY_PRINT_SCREEN    , KeyboardEvent::KeyCode::KEY_PRINT         },
    { GLFW_KEY_PAUSE           , KeyboardEvent::KeyCode::KEY_PAUSE         },
    { GLFW_KEY_F1              , KeyboardEvent::KeyCode::KEY_F1            },
    { GLFW_KEY_F2              , KeyboardEvent::KeyCode::KEY_F2            },
    { GLFW_KEY_F3              , KeyboardEvent::KeyCode::KEY_F3            },
    { GLFW_KEY_F4              , KeyboardEvent::KeyCode::KEY_F4            },
    { GLFW_KEY_F5              , KeyboardEvent::KeyCode::KEY_F5            },
    { GLFW_KEY_F6              , KeyboardEvent::KeyCode::KEY_F6            },
    { GLFW_KEY_F7              , KeyboardEvent::KeyCode::KEY_F7            },
    { GLFW_KEY_F8              , KeyboardEvent::KeyCode::KEY_F8            },
    { GLFW_KEY_F9              , KeyboardEvent::KeyCode::KEY_F9            },
    { GLFW_KEY_F10             , KeyboardEvent::KeyCode::KEY_F10           },
    { GLFW_KEY_F11             , KeyboardEvent::KeyCode::KEY_F11           },
    { GLFW_KEY_F12             , KeyboardEvent::KeyCode::KEY_F12           },
    { GLFW_KEY_F13             , KeyboardEvent::KeyCode::KEY_NONE          },
    { GLFW_KEY_F14             , KeyboardEvent::KeyCode::KEY_NONE          },
    { GLFW_KEY_F15             , KeyboardEvent::KeyCode::KEY_NONE          },
    { GLFW_KEY_F16             , KeyboardEvent::KeyCode::KEY_NONE          },
    { GLFW_KEY_F17             , KeyboardEvent::KeyCode::KEY_NONE          },
    { GLFW_KEY_F18             , KeyboardEvent::KeyCode::KEY_NONE          },
    { GLFW_KEY_F19             , KeyboardEvent::KeyCode::KEY_NONE          },
    { GLFW_KEY_F20             , KeyboardEvent::KeyCode::KEY_NONE          },
    { GLFW_KEY_F21             , KeyboardEvent::KeyCode::KEY_NONE          },
    { GLFW_KEY_F22             , KeyboardEvent::KeyCode::KEY_NONE          },
    { GLFW_KEY_F23             , KeyboardEvent::KeyCode::KEY_NONE          },
    { GLFW_KEY_F24             , KeyboardEvent::KeyCode::KEY_NONE          },
    { GLFW_KEY_F25             , KeyboardEvent::KeyCode::KEY_NONE          },
    { GLFW_KEY_KP_0            , KeyboardEvent::KeyCode::KEY_0             },
    { GLFW_KEY_KP_1            , KeyboardEvent::KeyCode::KEY_1             },
    { GLFW_KEY_KP_2            , KeyboardEvent::KeyCode::KEY_2             },
    { GLFW_KEY_KP_3            , KeyboardEvent::KeyCode::KEY_3             },
    { GLFW_KEY_KP_4            , KeyboardEvent::KeyCode::KEY_4             },
    { GLFW_KEY_KP_5            , KeyboardEvent::KeyCode::KEY_5             },
    { GLFW_KEY_KP_6            , KeyboardEvent::KeyCode::KEY_6             },
    { GLFW_KEY_KP_7            , KeyboardEvent::KeyCode::KEY_7             },
    { GLFW_KEY_KP_8            , KeyboardEvent::KeyCode::KEY_8             },
    { GLFW_KEY_KP_9            , KeyboardEvent::KeyCode::KEY_9             },
    { GLFW_KEY_KP_DECIMAL      , KeyboardEvent::KeyCode::KEY_PERIOD        },
    { GLFW_KEY_KP_DIVIDE       , KeyboardEvent::KeyCode::KEY_KP_DIVIDE     },
    { GLFW_KEY_KP_MULTIPLY     , KeyboardEvent::KeyCode::KEY_KP_MULTIPLY   },
    { GLFW_KEY_KP_SUBTRACT     , KeyboardEvent::KeyCode::KEY_KP_MINUS      },
    { GLFW_KEY_KP_ADD          , KeyboardEvent::KeyCode::KEY_KP_PLUS       },
    { GLFW_KEY_KP_ENTER        , KeyboardEvent::KeyCode::KEY_KP_ENTER      },
    { GLFW_KEY_KP_EQUAL        , KeyboardEvent::KeyCode::KEY_EQUAL         },
    { GLFW_KEY_LEFT_SHIFT      , KeyboardEvent::KeyCode::KEY_SHIFT         },
    { GLFW_KEY_LEFT_CONTROL    , KeyboardEvent::KeyCode::KEY_CTRL          },
    { GLFW_KEY_LEFT_ALT        , KeyboardEvent::KeyCode::KEY_ALT           },
    { GLFW_KEY_LEFT_SUPER      , KeyboardEvent::KeyCode::KEY_HYPER         },
    { GLFW_KEY_RIGHT_SHIFT     , KeyboardEvent::KeyCode::KEY_SHIFT         },
    { GLFW_KEY_RIGHT_CONTROL   , KeyboardEvent::KeyCode::KEY_CTRL          },
    { GLFW_KEY_RIGHT_ALT       , KeyboardEvent::KeyCode::KEY_ALT           },
    { GLFW_KEY_RIGHT_SUPER     , KeyboardEvent::KeyCode::KEY_HYPER         },
    { GLFW_KEY_MENU            , KeyboardEvent::KeyCode::KEY_MENU          },
    { GLFW_KEY_LAST            , KeyboardEvent::KeyCode::KEY_NONE          }
};

//begin EGLViewEventHandler
class EGLViewEventHandler
{
public:
    static bool s_captured;
    static float s_mouseX;
    static float s_mouseY;
    
    static void OnGLFWError(int errorID, const char* errorDesc);
    static void OnGLFWMouseCallBack(GLFWwindow* window, int button, int action, int modify);
    static void OnGLFWMouseMoveCallBack(GLFWwindow* window, double x, double y);
    static void OnGLFWKeyCallback(GLFWwindow* window, int key, int scancode, int action, int mods);
    static void OnGLFWCharCallback(GLFWwindow* window, unsigned int character);
    static void OnGLFWWindowPosCallback(GLFWwindow* windows, int x, int y);
};

bool EGLViewEventHandler::s_captured = false;
float EGLViewEventHandler::s_mouseX = 0;
float EGLViewEventHandler::s_mouseY = 0;

void EGLViewEventHandler::OnGLFWError(int errorID, const char* errorDesc)
{
    CCLOGERROR("GLFWError #%d Happen, %s\n", errorID, errorDesc);
}

void EGLViewEventHandler::OnGLFWMouseCallBack(GLFWwindow* window, int button, int action, int modify)
{
    EGLView* eglView = EGLView::getInstance();
    if(nullptr == eglView) return;
    if(GLFW_MOUSE_BUTTON_LEFT == button)
    {
        if(GLFW_PRESS == action)
        {
            s_captured = true;
            if (eglView->getViewPortRect().equals(Rect::ZERO) || eglView->getViewPortRect().containsPoint(Point(s_mouseX,s_mouseY)))
            {
                int id = 0;
                eglView->handleTouchesBegin(1, &id, &s_mouseX, &s_mouseY);
            }
        }
        else if(GLFW_RELEASE == action)
        {
            s_captured = false;
            if (eglView->getViewPortRect().equals(Rect::ZERO) || eglView->getViewPortRect().containsPoint(Point(s_mouseX,s_mouseY)))
            {
                int id = 0;
                eglView->handleTouchesEnd(1, &id, &s_mouseX, &s_mouseY);
            }
        }
    }
}

void EGLViewEventHandler::OnGLFWMouseMoveCallBack(GLFWwindow* window, double x, double y)
{
    s_mouseX = (float)x;
    s_mouseY = (float)y;
    EGLView* eglView = EGLView::getInstance();
    if(nullptr == eglView) return;
    
    s_mouseX /= eglView->getFrameZoomFactor();
    s_mouseY /= eglView->getFrameZoomFactor();
    
    if(s_captured)
    {
        if (eglView->getViewPortRect().equals(Rect::ZERO) || eglView->getViewPortRect().containsPoint(Point(s_mouseX,eglView->getFrameSize().height - s_mouseY)))
        {
            int id = 0;
            eglView->handleTouchesMove(1, &id, &s_mouseX, &s_mouseY);
        }
    }
}

void EGLViewEventHandler::OnGLFWKeyCallback(GLFWwindow *window, int key, int scancode, int action, int mods)
{
    KeyboardEvent event;
    event._keyCode = g_keyCodeMap[key];
    event._isPressed = (GLFW_PRESS == action);
    EventDispatcher::getInstance()->dispatchEvent(&event);
}

void EGLViewEventHandler::OnGLFWCharCallback(GLFWwindow *window, unsigned int character)
{
    IMEDispatcher::sharedDispatcher()->dispatchInsertText((const char*) &character, 1);
}

void EGLViewEventHandler::OnGLFWWindowPosCallback(GLFWwindow *windows, int x, int y)
{
    if(Director::getInstance())
    {
        Director::getInstance()->setViewport();
    }
}
//end EGLViewEventHandler


//////////////////////////////////////////////////////////////////////////
// impliment EGLView
//////////////////////////////////////////////////////////////////////////

EGLView* EGLView::s_pEglView = nullptr;

EGLView::EGLView()
: _captured(false)
, _frameZoomFactor(1.0f)
, _supportTouch(false)
, _mainWindow(nullptr)
{
    CCASSERT(nullptr == s_pEglView, "EGLView is singleton, Should be inited only one time\n");
    s_pEglView = this;
    strcpy(_viewName, "Cocos2dxWin32");
    glfwSetErrorCallback(EGLViewEventHandler::OnGLFWError);
    glfwInit();
}

EGLView::~EGLView()
{
    glfwTerminate();
    s_pEglView = nullptr;
}

bool EGLView::init(const char* viewName, float width, float height, float frameZoomFactor)
{
    if(nullptr != _mainWindow) return true;

    setViewName(viewName);
    setFrameSize(width, height);
    setFrameZoomFactor(frameZoomFactor);

    glfwWindowHint(GLFW_RESIZABLE,GL_FALSE);
   _mainWindow = glfwCreateWindow(_screenSize.width * _frameZoomFactor, _screenSize.height * _frameZoomFactor, _viewName, nullptr, nullptr);
    glfwMakeContextCurrent(_mainWindow);
    
    glfwGetFramebufferSize(_mainWindow, &_frameBufferSize[0], &_frameBufferSize[1]);
    
    glfwSetMouseButtonCallback(_mainWindow,EGLViewEventHandler::OnGLFWMouseCallBack);
    glfwSetCursorPosCallback(_mainWindow,EGLViewEventHandler::OnGLFWMouseMoveCallBack);
    glfwSetCharCallback(_mainWindow, EGLViewEventHandler::OnGLFWCharCallback);
    glfwSetKeyCallback(_mainWindow, EGLViewEventHandler::OnGLFWKeyCallback);
    glfwSetWindowPosCallback(_mainWindow, EGLViewEventHandler::OnGLFWWindowPosCallback);

    // check OpenGL version at first
    const GLubyte* glVersion = glGetString(GL_VERSION);
    CCLOG("OpenGL version = %s", glVersion);
    
    if ( atof((const char*)glVersion) < 1.5 )
    {
        char strComplain[256] = {0};
        sprintf(strComplain,
                "OpenGL 1.5 or higher is required (your version is %s). Please upgrade the driver of your video card.",
                glVersion);
        MessageBox(strComplain, "OpenGL version too old");
        return false;
    }
    
    GLenum GlewInitResult = glewInit();
    if (GLEW_OK != GlewInitResult)
    {
        MessageBox((char *)glewGetErrorString(GlewInitResult), "OpenGL error");
        return false;
    }
    
    if (GLEW_ARB_vertex_shader && GLEW_ARB_fragment_shader)
    {
        log("Ready for GLSL");
    }
    else
    {
        log("Not totally ready :(");
    }
    
    if (glewIsSupported("GL_VERSION_2_0"))
    {
       log("Ready for OpenGL 2.0");
    }
    else
    {
        log("OpenGL 2.0 not supported");
    }
    
//    if(glew_dynamic_binding() == false)
//    {
//        MessageBox("No OpenGL framebuffer support. Please upgrade the driver of your video card.", "OpenGL error");
//        return false;
//    }
//    
    // Enable point size by default on windows.
    glEnable(GL_VERTEX_PROGRAM_POINT_SIZE);
    
    return true;
}

bool EGLView::isOpenGLReady()
{
    return nullptr != _mainWindow;
}

void EGLView::end()
{
    if(_mainWindow)
        glfwSetWindowShouldClose(_mainWindow,1);
}

void EGLView::swapBuffers()
{
    if(_mainWindow)
        glfwSwapBuffers(_mainWindow);
}

bool EGLView::windowShouldClose()
{
    if(_mainWindow)
        return glfwWindowShouldClose(_mainWindow);
    else
        return true;
}

void EGLView::pollEvents()
{
    glfwPollEvents();
}

void EGLView::setIMEKeyboardState(bool /*bOpen*/)
{
    
}

void EGLView::setFrameZoomFactor(float fZoomFactor)
{
    _frameZoomFactor = fZoomFactor;
    Director::getInstance()->setProjection(Director::getInstance()->getProjection());
}

float EGLView::getFrameZoomFactor()
{
    return _frameZoomFactor;
}

void EGLView::setFrameSize(float width, float height)
{
    EGLViewProtocol::setFrameSize(width, height);
}

void EGLView::setViewPortInPoints(float x , float y , float w , float h)
{
    float frameZoomFactorX = _frameBufferSize[0]/_screenSize.width;
    float frameZoomFactorY = _frameBufferSize[1]/_screenSize.height;
    glViewport((GLint)(x * _scaleX * frameZoomFactorX + _viewPortRect.origin.x * frameZoomFactorX),
               (GLint)(y * _scaleY  * frameZoomFactorY + _viewPortRect.origin.y * frameZoomFactorY),
               (GLsizei)(w * _scaleX * frameZoomFactorX),
               (GLsizei)(h * _scaleY * frameZoomFactorY));
}

void EGLView::setScissorInPoints(float x , float y , float w , float h)
{
    float frameZoomFactorX = _frameBufferSize[0]/_screenSize.width;
    float frameZoomFactorY = _frameBufferSize[1]/_screenSize.height;
    glScissor((GLint)(x * _scaleX * frameZoomFactorX + _viewPortRect.origin.x * frameZoomFactorX),
               (GLint)(y * _scaleY  * frameZoomFactorY + _viewPortRect.origin.y * frameZoomFactorY),
               (GLsizei)(w * _scaleX * frameZoomFactorX),
               (GLsizei)(h * _scaleY * frameZoomFactorY));
}

EGLView* EGLView::getInstance()
{
    CCASSERT(nullptr != s_pEglView, "EGL singleton should not be null");
    return s_pEglView;
}

// XXX: deprecated
EGLView* EGLView::sharedOpenGLView()
{
    return EGLView::getInstance();
}

NS_CC_END