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#include <assert.h>
#include <screen/screen.h>
#include <bps/navigator.h>
#include <bps/screen.h>
#include <bps/bps.h>
#include <bps/event.h>
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <math.h>

#include <EGL/egl.h>
#include <GLES2/gl2.h>

#include "bbutil.h"

// Scene.
#include "scene/scene.h"
#include "helpers/global.h"

static screen_context_t screen_cxt;


void handleScreenEvent(bps_event_t *event) {
    screen_event_t screen_event = screen_event_get_event(event);

    int screen_val;
    screen_get_event_property_iv(screen_event, SCREEN_PROPERTY_TYPE, &screen_val);

    switch (screen_val) {
    case SCREEN_EVENT_MTOUCH_TOUCH:
    case SCREEN_EVENT_MTOUCH_MOVE:
    case SCREEN_EVENT_MTOUCH_RELEASE:
        break;
    }
}

int initialize() {
    //Query width and height of the window surface created by utility code
    EGLint surface_width, surface_height;

    eglQuerySurface(egl_disp, egl_surf, EGL_WIDTH, &surface_width);
    eglQuerySurface(egl_disp, egl_surf, EGL_HEIGHT, &surface_height);

    return EXIT_SUCCESS;
}

void setupScene() {
    glClearColor(250, 250, 250, 1);
    glViewport(0, 0, 600, 1024);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
}

void drawScene() {
    setupScene();

    glColorMask(0, 0, 0, 1);

    const GLfloat triangleVertices[] = {
        100,   100,
        150,  0,
        200,   100
    };

    glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, triangleVertices);
    glEnableVertexAttribArray(0);
    glDrawArrays(GL_TRIANGLES, 0, 2);
}


void render() {
    drawScene();
    bbutil_swap();
}

int main(int argc, char *argv[]) {
    int rc;
    int exit_application = 0;

    //Create a screen context that will be used to create an EGL surface to to receive libscreen events
    screen_create_context(&screen_cxt, 0);

    //Initialize BPS library
    bps_initialize();

    //Use utility code to initialize EGL for rendering with GL ES 2.0
    if (EXIT_SUCCESS != bbutil_init_egl(screen_cxt)) {
        fprintf(stderr, "bbutil_init_egl failed\n");
        bbutil_terminate();
        screen_destroy_context(screen_cxt);
        return 0;
    }

    //Initialize application logic
    if (EXIT_SUCCESS != initialize()) {
        fprintf(stderr, "initialize failed\n");
        bbutil_terminate();
        screen_destroy_context(screen_cxt);
        bps_shutdown();
        return 0;
    }

    //Signal BPS library that navigator and screen events will be requested
    if (BPS_SUCCESS != screen_request_events(screen_cxt)) {
        fprintf(stderr, "screen_request_events failed\n");
        bbutil_terminate();
        screen_destroy_context(screen_cxt);
        bps_shutdown();
        return 0;
    }

    if (BPS_SUCCESS != navigator_request_events(0)) {
        fprintf(stderr, "navigator_request_events failed\n");
        bbutil_terminate();
        screen_destroy_context(screen_cxt);
        bps_shutdown();
        return 0;
    }

    //Signal BPS library that navigator orientation is not to be locked
    if (BPS_SUCCESS != navigator_rotation_lock(false)) {
        fprintf(stderr, "navigator_rotation_lock failed\n");
        bbutil_terminate();
        screen_destroy_context(screen_cxt);
        bps_shutdown();
        return 0;
    }

    while (!exit_application) {
        //Request and process all available BPS events
        bps_event_t *event = NULL;

        for(;;) {
            rc = bps_get_event(&event, 0);
            assert(rc == BPS_SUCCESS);

            if (event) {
                int domain = bps_event_get_domain(event);

                if (domain == screen_get_domain()) {
                    handleScreenEvent(event);
                } else if ((domain == navigator_get_domain())
                        && (NAVIGATOR_EXIT == bps_event_get_code(event))) {
                    exit_application = 1;
                }
            } else {
                break;
            }
        }
        render();
    }

    //Stop requesting events from libscreen
    screen_stop_events(screen_cxt);

    //Shut down BPS library for this process
    bps_shutdown();

    //Use utility code to terminate EGL setup
    bbutil_terminate();

    //Destroy libscreen context
    screen_destroy_context(screen_cxt);
    return 0;
}