#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ncurses.h>

/* define ANSI escape chars */
#define RESET "\033[0m"
#define BOLD "\033[1m"
#define UNDERLINE "\033[4m"
#define BLINK "\033[5m"
#define REVERSED "\033[7m"
#define BLACK "\033[30m"
#define RED "\033[31m"
#define GREEN "\033[32m"
#define YELLOW "\033[33m"
#define BLUE "\033[34m"
#define MAGENTA "\033[35m"
#define CYAN "\033[36m"
#define WHITE "\033[37m"
#define BG_BLACK "\033[40m"
#define BG_RED "\033[41m"
#define BG_GREEN "\033[42m"
#define BG_YELLOW "\033[43m"
#define BG_BLUE "\033[44m"
#define BG_MAGENTA "\033[45m"
#define BG_CYAN "\033[46m"
#define BG_WHITE "\033[47m"

/* declare global constants */


/* declare reusable functions */

/* read out shell command output */
char* readout(const char* command, char* buffer, size_t size) {
    FILE *fp = popen(command, "r");
    if (fp == NULL) {
        perror("popen");
        exit(EXIT_FAILURE);
    }
    if (fgets(buffer, size, fp) == NULL) {
        perror("fgets");
        pclose(fp);
        exit(EXIT_FAILURE);
    }
    pclose(fp);
    /* remove the newline character at the end of the buffer */
    buffer[strcspn(buffer, "\n")] = 0;
    return buffer;
}

void startup_screen() {
    printf("\n\n");
    printf(CYAN"                             █████     ███                      ████ \n");
    printf("                             ░░███     ░░░                      ░░███ \n");
    printf("  █████   ██████  ████████   ███████   ████  ████████    ██████  ░███ \n");
    printf(" ███░░   ███░░███░░███░░███ ░░░███░   ░░███ ░░███░░███  ███░░███ ░███ \n");
    printf("░░█████ ░███████  ░███ ░███   ░███     ░███  ░███ ░███ ░███████  ░███ \n");
    printf(" ░░░░███░███░░░   ░███ ░███   ░███ ███ ░███  ░███ ░███ ░███░░░   ░███ \n");
    printf(" ██████ ░░██████  ████ █████  ░░█████  █████ ████ █████░░██████  █████\n");
    printf("░░░░░░   ░░░░░░  ░░░░ ░░░░░    ░░░░░  ░░░░░ ░░░░ ░░░░░  ░░░░░░  ░░░░░ \n\n");
    printf("        v0.0.1\n" RESET);
}

/* declare functions for startup checks */
void util_check() {
    printf("curl: ");
    if (system("curl --version > /dev/null 2>&1") == 0) {
        printf(GREEN"OK\n"RESET);
    } else {
        printf(RED"FAIL\n"RESET);
    }
    printf("rtl-sdr: ");
    if (system("ls /usr/bin/rtl_sdr > /dev/null 2>&1") == 0) {
        printf(GREEN"OK\n"RESET);
    } else {
        printf(RED"FAIL\n"RESET);
    }
}


/* making sure program has everything it needs to run, more checks will be introduced as capabilities are added */
void startup_checks() {
    printf("######################################################################\n");
    printf(MAGENTA"STARTUP CHECKS\n"RESET);
    printf("----------------------------------------------------------------------\n");
    printf(MAGENTA"SYSTEM STATUS\n\n"RESET);
    printf("date: %s\n", readout("date \"+%D\"", (char[100]){0}, 100));
    printf("time: %s\n", readout("date \"+%T\"", (char[100]){0}, 100));
    /* internet connectivity check */
    int status = system("ping -c 1 fsf.org > /dev/null 2>&1");
    if (status == 0) {
        printf("internet connectivity status: ");
        printf(GREEN"online\n"RESET);
    } else {
       printf("internet connectivity status: ");
       printf(RED"offline\n"RESET);
       printf(RED"internet-dependent capabilities will be unavailable!"RESET);
    }
    printf("----------------------------------------------------------------------\n");
    /* utilities presence check */
    printf(MAGENTA"UTILITIES\n\n"RESET);
    util_check();
    printf("----------------------------------------------------------------------\n");
    printf(MAGENTA"all checks finished!\n"RESET);
    printf("######################################################################\n");
}

/* define functions for dashboard - WIP */

/*
void start_dashboard() {
    initscr();
    cbreak();
    noecho();
}
*/


int main() {
    startup_screen();
    startup_checks();
    return 0;
}