#include <GL/glew.h>
#include <GLFW/glfw3.h>
#include "tigl.h"
#include "FpsCam.h"
#include <iostream>
#include <glm/gtc/matrix_transform.hpp>
using tigl::Vertex;

#pragma comment(lib, "glfw3.lib")
#pragma comment(lib, "glew32s.lib")
#pragma comment(lib, "opengl32.lib")

GLFWwindow* window;

void init();
void update();
void draw();

int main(void)
{
    if (!glfwInit())
        throw "Could not initialize glwf";
    window = glfwCreateWindow(1400, 800, "Hello World", NULL, NULL);
    if (!window)
    {
        glfwTerminate();
        throw "Could not initialize glwf";
    }
    glfwMakeContextCurrent(window);

    tigl::init();

    init();

	while (!glfwWindowShouldClose(window))
	{
		update();
		draw();
		glfwSwapBuffers(window);
		glfwPollEvents();
	}

	glfwTerminate();


    return 0;
}

FpsCam* camera;

void init()
{
    glfwSetKeyCallback(window, [](GLFWwindow* window, int key, int scancode, int action, int mods)
    {
        if (key == GLFW_KEY_ESCAPE)
            glfwSetWindowShouldClose(window, true);
    });
    camera = new FpsCam(window);
}


void update()
{
    camera->update(window);

}

void draw()
{
    glClearColor(0.3f, 0.4f, 0.6f, 1.0f);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    
    int viewport[4];
    glGetIntegerv(GL_VIEWPORT, viewport);
    glm::mat4 projection = glm::perspective(glm::radians(75.0f), viewport[2] / (float)viewport[3], 0.01f, 100.0f);

    tigl::shader->setProjectionMatrix(projection);
    tigl::shader->setViewMatrix(camera->getMatrix());
    tigl::shader->setModelMatrix(glm::mat4(1.0f));

    tigl::shader->enableColor(true);

    glEnable(GL_DEPTH_TEST);

    tigl::begin(GL_TRIANGLES);
    tigl::addVertex(Vertex::PC(glm::vec3(-2, -1, -4), glm::vec4(1, 0, 0, 1)));
    tigl::addVertex(Vertex::PC(glm::vec3(2, -1, -4), glm::vec4(0, 1, 0, 1)));
    tigl::addVertex(Vertex::PC(glm::vec3(0, 1, -4), glm::vec4(0, 0, 1, 1)));


    tigl::addVertex(Vertex::PC(glm::vec3(-10, -1, -10), glm::vec4(1, 1, 1, 1)));
    tigl::addVertex(Vertex::PC(glm::vec3(-10, -1, 10), glm::vec4(1, 1, 1, 1)));
    tigl::addVertex(Vertex::PC(glm::vec3(10, -1, 10), glm::vec4(1, 1, 1, 1)));

    tigl::addVertex(Vertex::PC(glm::vec3(-10, -1, -10), glm::vec4(1, 1, 1, 1)));
    tigl::addVertex(Vertex::PC(glm::vec3(10, -1, -10), glm::vec4(1, 1, 1, 1)));
    tigl::addVertex(Vertex::PC(glm::vec3(10, -1, 10), glm::vec4(1, 1, 1, 1)));

    tigl::end();
}