add logging code and get it setup

logging.c

@@ -0,0 +1,68 @@
+#include "logging.h"
+
+FILE* log_file = NULL;
+
+pthread_mutex_t log_mutex = PTHREAD_MUTEX_INITIALIZER;
+
+int log_level = LOG_DEBUG;  // Should pull from env variables eventually
+
+void set_log_level(int level) { log_level = level; }
+
+void open_log_file() {
+    log_file = fopen(LOG_FILE_NAME, "a");
+    if (log_file == NULL) {
+        perror("Failed to open log file\n");
+    }
+}
+
+void close_log_file() {
+    if (log_file != NULL) {
+        fclose(log_file);
+        log_file = NULL;
+    }
+}
+
+void log_message(int level, const char* fmt, ...) {
+    if (level < log_level) {
+        return;
+    }
+    char timestamp[32];
+    time_t now = time(NULL);
+    struct tm* timeinfo = localtime(&now);
+    strftime(timestamp, sizeof(timestamp), "%Y-%m-%d %H:%M:%S", timeinfo);
+
+    char* level_str = level == LOG_DEBUG  ? "DEBUG"
+                      : level == LOG_INFO ? "INFO"
+                      : level == LOG_WARN ? "WARN"
+                                          : "ERROR";
+
+    // Use variadic arguments to format string
+    va_list args;
+    va_start(args, fmt);
+
+    // Log to console
+    fprintf(stderr, "[%s] [%s] ", timestamp, level_str);
+    vfprintf(stderr, fmt, args);
+    fprintf(stderr, "\n");
+
+    // Reset variadic arguments
+    va_end(args);
+    va_start(args, fmt);
+
+    // Log to file
+    pthread_mutex_lock(&log_mutex);
+    if (log_file == NULL) {
+        open_log_file();
+    }
+    if (log_file == NULL) {
+        perror("Failed to open log file\n");
+    }
+    if (log_file != NULL) {
+        fprintf(log_file, "[%s] [%s] ", timestamp, level_str);
+        vfprintf(log_file, fmt, args);
+        fprintf(log_file, "\n");
+    }
+    fflush(log_file);
+    pthread_mutex_unlock(&log_mutex);
+    va_end(args);
+}