#include <cstdarg>
#include <cstdio>
#include <ctime>
#include <mutex>

#include <nxst/infra/sys/logger.hpp>

namespace {

std::mutex g_log_mutex;

#if defined(__SWITCH__)
constexpr const char* kLogPath = "/switch/NXST/log.log";
#else
constexpr const char* kLogPath = "nxst.log";
#endif

void writeEntry(const char* tag, const char* fmt, va_list args) {
    char msg[2048];
    vsnprintf(msg, sizeof(msg), fmt, args);

    time_t now = time(nullptr);
    struct tm tm_buf;
    localtime_r(&now, &tm_buf);
    char time_str[16];
    strftime(time_str, sizeof(time_str), "%H:%M:%S", &tm_buf);

    std::lock_guard<std::mutex> lock(g_log_mutex);

    fprintf(stderr, "[%s]%s %s\n", time_str, tag, msg);

    FILE* log_file = fopen(kLogPath, "a");
    if (log_file != nullptr) {
        fprintf(log_file, "[%s]%s %s\n", time_str, tag, msg);
        fclose(log_file);
    }
}

}  // namespace

namespace nxst::log {

void write(Level level, const char* fmt, ...) {
    const char* tag = "[INFO] ";
    switch (level) {
    case Level::Debug:
        tag = "[DEBUG]";
        break;
    case Level::Info:
        tag = "[INFO] ";
        break;
    case Level::Warn:
        tag = "[WARN] ";
        break;
    case Level::Error:
        tag = "[ERROR]";
        break;
    }
    va_list args;
    va_start(args, fmt);
    writeEntry(tag, fmt, args);
    va_end(args);
}

void debug(const char* fmt, ...) {
    va_list args;
    va_start(args, fmt);
    writeEntry("[DEBUG]", fmt, args);
    va_end(args);
}
void info(const char* fmt, ...) {
    va_list args;
    va_start(args, fmt);
    writeEntry("[INFO] ", fmt, args);
    va_end(args);
}
void warn(const char* fmt, ...) {
    va_list args;
    va_start(args, fmt);
    writeEntry("[WARN] ", fmt, args);
    va_end(args);
}
void error(const char* fmt, ...) {
    va_list args;
    va_start(args, fmt);
    writeEntry("[ERROR]", fmt, args);
    va_end(args);
}

}  // namespace nxst::log