#include <stdio.h>

#include <stdbool.h>

#include <GL/glew.h>

#include <GLFW/glfw3.h>

#include <GL/gl.h>

#include "nanovg/nanovg.h"

#define NANOVG_GL2_IMPLEMENTATION

#include "nanovg/nanovg_gl.h"

#include "draw.h"

#include "view.h"

//#include "perf.h"

int mouse_down;

double drag_x;

double drag_y;

double current_x;

double current_y;

int current_mod;

static void key(GLFWwindow* window, int key, int scancode, int action, int mods)

{

printf("Key event...\n");

}

static void mouse_event(GLFWwindow *window, int button, int action, int mod)

{

if(action == GLFW_PRESS) {

if(!mouse_down) {

drag_x = current_x;

drag_y = current_y;

}

mouse_down |= (1<<button);

} else {

mouse_down &= ~(1<<button);

}

current_mod = mod;

printf("Mouse Event[%x](%d, %d, %d)...\n", mouse_down, button, action, mod);

}

static void mouse_hover(GLFWwindow *window, double x, double y)

{

if(mouse_down) {

//printf("Drag[%x,%d] (%f,%f)->(%f,%f) [%f,%f]\n", mouse_down, current_mod,

// drag_x, drag_y, x, y, x-current_x, y-current_y);

}

current_x = x;

current_y = y;

//printf("Mouse hover(%f, %f)\n",x,y);

}

int main()

{

GLFWwindow* window;

NVGcontext *vg;

if(!glfwInit()) {

fprintf(stderr, "Failed to start glfw\n");

return -1;

}

//Set OpenGL Revision

glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 2);

glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0);

//Create Window

window = glfwCreateWindow(1000, 600, "NanoVG", NULL, NULL);

if (!window) {

fprintf(stderr, "Failed to make window\n");

glfwTerminate();

return -1;

}

//Setup Context

glfwSetKeyCallback(window, key);

glfwSetMouseButtonCallback(window, mouse_event);

glfwSetCursorPosCallback(window, mouse_hover);

glfwMakeContextCurrent(window);

glewExperimental = GL_TRUE;

if(glewInit() != GLEW_OK) {

fprintf(stderr, "Failed to start GLEW\n");

return -1;

}

vg = nvgCreateGL2(NVG_ANTIALIAS | NVG_STENCIL_STROKES | NVG_DEBUG);

nvgCreateFont(vg, "sans", "Roboto-Regular.ttf");

nvgCreateFont(vg, "icons", "entypo.ttf");

glfwSwapInterval(0);

glfwSetTime(0);

long prevt = glfwGetTime();

while (!glfwWindowShouldClose(window))

{

double mx, my;

int winWidth, winHeight;

int fbWidth, fbHeight;

float pxRatio;

glfwGetCursorPos(window, &mx, &my);

glfwGetWindowSize(window, &winWidth, &winHeight);

glfwGetFramebufferSize(window, &fbWidth, &fbHeight);

// Calculate pixel ration for hi-dpi devices.

pxRatio = (float)fbWidth / (float)winWidth;

// Update and render

glViewport(0, 0, fbWidth, fbHeight);

//glClearColor(0x06/255.0, 0x27/255.0, 0x37/255.0, 1.0f);

glClearColor(0, 0, 0, 1.0f);

glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT|GL_STENCIL_BUFFER_BIT);

//#define M_PI 3.14159

nvgBeginFrame(vg, winWidth, winHeight, pxRatio);

//float in[100] = {0.0, 0.0, 0.5, 0.2, 0.3, 0.7,0.9,0.8,0.0,1.0};

//drawHarmonicPlot(vg, in, 100, 0,0,winWidth, winHeight);

//drawPowButton(vg, 0,0,winWidth, winHeight);

drawPanDial(vg, "100", 0.4, 0, 0, winWidth, winHeight);

//nvgBeginPath(vg);

//float cx = 30.0, cy = 30.0, h = 80;

//nvgArc(vg, cx, cy, 0.4*h, 0, 1.0/2.0*M_PI, 1);

//nvgArc(vg, cx, cy, 0.2*h, 1.0/2.0*M_PI, 0, 2);

//nvgClosePath(vg);

//nvgFillColor(vg, nvgRGBA(0x11,0x45,0x75,255));

//nvgFill(vg);

nvgEndFrame(vg);

// nvgBeginFrame(vg, winWidth, winHeight, pxRatio);

//

// //viewReverb(vg, 0,0, winWidth, winHeight);

// viewModule(vg, "afilter", 0,0,winWidth, winHeight);

// //viewLFO(vg, 0,0, winWidth, winHeight);

// //viewFilterEnv(vg, 0,0, winWidth, winHeight);

// //y x y x y x y x y x

// //float in[10] = {0.0, 0.0, 0.5, 0.2, 0.3, 0.7,-0.9,0.8,0.0,1.0};

// //drawEnvEdit(vg, in, 5, 3, 0, 0, winWidth, winHeight);

//

//#if 0

// dial_t dial = {60, 0, 0, 100, "label"};

// renderDial(vg, dial);

// drawButton(vg, "banana", 100, 25, 100, 50);

// drawOptButton(vg, "opt", 200, 25, 100, 50);

// drawButtonGrid(vg, 4,4, 300, 0, 100, 100);

// drawAltDial(vg, 400, 0, 100, 100);

// drawGrid(vg, 8, 8, 500, 0, 200, 200);

// drawSin(vg, 500, 0, 200, 200);

//#endif

//

// nvgEndFrame(vg);

glfwSwapBuffers(window);

glfwPollEvents();

}

nvgDeleteGL2(vg);

glfwTerminate();

return 0;

}