#include "utils.h"

// Niveau de log par défaut
LogLevel currentLogLevel = LOG_INFO;

String sha256(const String& data) {
    byte hash[32];
    mbedtls_md_context_t ctx;
    mbedtls_md_type_t md_type = MBEDTLS_MD_SHA256;

    mbedtls_md_init(&ctx);
    mbedtls_md_setup(&ctx, mbedtls_md_info_from_type(md_type), 0);
    mbedtls_md_starts(&ctx);
    mbedtls_md_update(&ctx, (const unsigned char*)data.c_str(), data.length());
    mbedtls_md_finish(&ctx, hash);
    mbedtls_md_free(&ctx);

    String hashString = "";
    for (int i = 0; i < 32; i++) {
        char hex[3];
        sprintf(hex, "%02x", hash[i]);
        hashString += hex;
    }
    return hashString;
}

String generateSessionId() {
    String sessionId = "";
    for (int i = 0; i < 32; i++) {
        sessionId += String(random(0, 16), HEX);
    }
    return sessionId;
}

unsigned long getCurrentTime() {
    return millis();
}

void logMessage(LogLevel level, const String& message) {
    if (level < currentLogLevel) return;

    String levelStr;
    switch (level) {
        case LOG_DEBUG: levelStr = "[DEBUG]"; break;
        case LOG_INFO:  levelStr = "[INFO]"; break;
        case LOG_WARN:  levelStr = "[WARN]"; break;
        case LOG_ERROR: levelStr = "[ERROR]"; break;
    }

    Serial.print(levelStr);
    Serial.print(" ");
    Serial.println(message);
}