#include "../include/cfetch.h"
#include <sys/utsname.h>

void get_os(system_info_t *info) {
#ifdef __linux__
    struct utsname u;

    if (uname(&u) == 0) {
	size_t length = printf("OS: %s %s %s %s\n", u.sysname, u.release, u.version, u.machine);
    } else {
	perror("Error while accessing uname");
	return;
    }
#endif
    return;
}

void get_cpu(system_info_t *info) {
    FILE* file = fopen("/proc/cpuinfo", "r");

    //check file existence
    if (!file) {
	perror("/proc/cpuinfo not found");
	return;
    }

    char line[256];
    char *model_name = NULL;
    
    //read per line
    while (fgets(line, sizeof(line), file)) {
	char* p = strstr(line, "model name");

	if (p != NULL) {
	    model_name = strchr(p, ':') + 1; //skip :
	    break;
	}
    }

    if (model_name != NULL) {
	char *string = string_format(model_name);

	if (string == NULL) {
	    printf("CPU: Error string not found.\n");
	    free(string);
	    model_name = NULL;
	} else {
	    printf("CPU: %s\n", string);
	    free(string);
	    model_name = NULL;
	}

    } else {
	printf("CPU: Error model_name not found.\n");
    }

    fclose(file);
    return;
}

void get_memory(system_info_t *info) {
    FILE *file = fopen("/proc/meminfo", "r");

    if (!file) {
	perror("Error fopen meminfo");
	return;
    }

    char line[256];
    long total = 0;
    long available = 0;

    // read per line
    while (fgets(line, sizeof(line), file)) {
	if (sscanf(line, "MemTotal: %ld kB", &total) == 1) continue;
	if (sscanf(line, "MemAvailable: %ld kB", &available) == 1) continue;
    }

    fclose(file);

    printf("Memory: %.2f GB / %.2f GB\n", (total - available) / (1024.0 * 1024.0), total / (1024.0 * 1024.0));

    return;
}