/*
 * Copyright (c) 2025 Amlogic, Inc. All rights reserved.
 *
 * This source code is subject to the terms and conditions defined in the
 * file 'LICENSE' which is part of this source code package.
 *
 * Description:
 */
#include <unistd.h>
#include <stdlib.h>
#include "MesonLog.h"
#include <time.h>

#define MAX_MSG_BUF 512
#define TIME_BUF 64

static LogLevel g_backend_debug = LOG_LEVEL_INFO;
static int g_log_to_logcat = 0;

void meson_log_set_debug_level(LogLevel level) {
    fprintf(stderr, "meson_log_set_debug_level:%d\n", level);
    g_backend_debug = level;
}
void meson_log_set_log_to_logcat(int to_logcat) {
    fprintf(stderr, "meson_log_set_log_to_logcat:%d\n", to_logcat);

    g_log_to_logcat = to_logcat;
}
static const char* log_level_to_string(LogLevel level) {
    switch (level) {
        case LOG_LEVEL_ERROR:
            return "[E]MesonDisplay: ";
        case LOG_LEVEL_WARN:
            return "[W]MesonDisplay: ";
        case LOG_LEVEL_INFO:
            return "[I]MesonDisplay: ";
        case LOG_LEVEL_DEBUG:
            return "[D]MesonDisplay: ";
        case LOG_LEVEL_VERBOSE:
            return "[V]MesonDisplay: ";
        default:
            return "UNKNOWN";
    }
}

void meson_log_impl(LogLevel level, const char *fmt, ...) {
    struct timespec ts;
    char time_buf[TIME_BUF] = {0};
    char final_msg[MAX_MSG_BUF] = {0};
    va_list args;

    if (level > g_backend_debug )
        return;

    if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0) {
        snprintf(time_buf, sizeof(time_buf), "%lld.%09lld", (long long)ts.tv_sec, (long long)ts.tv_nsec);
    } else {
        snprintf(time_buf, sizeof(time_buf), "0.0");
    }

    int len = snprintf(final_msg, sizeof(final_msg), "[%s][%s] ", time_buf, log_level_to_string(level));

    if (len > 0 && len < sizeof(final_msg)) {
        va_start(args, fmt);
        int written = vsnprintf(final_msg + len, sizeof(final_msg) - len, fmt, args);
        va_end(args);
        if (written < 0) {
            final_msg[len] = '\0';
        }
    }
    if (g_log_to_logcat)
        ALOGI("%s\n", final_msg);
    else
        fprintf(stderr, "%s\n", final_msg);
}