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

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

    if (uname(&u) == 0) {
	snprintf(info->kernel, sizeof(info->kernel), "%.30s %.30s", u.sysname, u.release);
	printf("Kernel: %s\n", info->kernel);
    } 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) {
	snprintf(info->cpu, sizeof(info->cpu), "Unknown");
	return;
    }

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

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

    if (colon != NULL) {
	snprintf(info->cpu, sizeof(info->cpu), "%s", trim_whitespace(colon));

	printf("CPU: %s\n", info->cpu);
    }     

    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;
}