#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <time.h> 
#include <stdint.h>
#include <wayland-client.h>
#include <wayland-util.h>
#include <pthread.h>
#include <sys/mman.h>
#include "renderer.h"
#include "wayland.h"
#include <string.h>

struct timespec program_start;

void init_timer() {
    clock_gettime(CLOCK_MONOTONIC, &program_start);
}

double time_since_start() {
    struct timespec now;
    clock_gettime(CLOCK_MONOTONIC, &now);

    return (now.tv_sec - program_start.tv_sec) +
           (now.tv_nsec - program_start.tv_nsec) / 1e9;
}

int main(int argc, char *argv[]) {
    char *shader_path = NULL;
    int output_type = OUTPUT_WINDOW;
    // syntax: --window for a normal window or --layer for a wallpaper
    for (int i = 1; i < argc; i++) {
        if (strcmp("--window", argv[i]) == 0) {
            output_type = OUTPUT_WINDOW;
        }
        else if (strcmp("--layer", argv[i]) == 0) {
            output_type = OUTPUT_LAYER;
        }
        else {
            // path to fragment shader
            if (shader_path != NULL) {
                fprintf(stderr, "tried supplying '%s' as a shader file while one has already been selected\n", argv[i]);
                return 1;
            }
            shader_path = argv[i];
        }
    }
    if (shader_path == NULL) {
        printf("need to supply path to shader\n");
        return 1;
    }

    struct client_state state;
    wayland_init(&state, output_type);

    Renderer renderer = new_renderer();

    while (state.running) {
        double time = time_since_start();
        render(&renderer, state.width, state.height, time, shader_path, 0);
        commit(&state);
    }

    return 0;
}