// ============================================================================
// logger.c - 日志系统实现
// ============================================================================

#include "logger.h"
#include <stdio.h>
#include <stdarg.h>
#include <time.h>
#include <string.h>

static FILE* g_log_file = NULL;
static LogLevel g_log_level = LOG_TRACE;

static const char* level_strings[] = {
    "TRACE", "DEBUG", "INFO ", "WARN ", "ERROR", "FATAL"
};

void logger_init(const char* log_file) {
    if (log_file) {
        g_log_file = fopen(log_file, "w");
        if (g_log_file) {
            fprintf(g_log_file, "=== Lity3D Engine Log ===\n");
            fflush(g_log_file);
        }
    }
    printf("=== Lity3D Engine Log ===\n");
}

void logger_shutdown(void) {
    if (g_log_file) {
        fclose(g_log_file);
        g_log_file = NULL;
    }
}

void logger_set_level(LogLevel level) {
    g_log_level = level;
}

void logger_log(LogLevel level, const char* file, int line, const char* fmt, ...) {
    if (level < g_log_level) return;

    // 时间戳
    time_t now = time(NULL);
    struct tm* tm_info = localtime(&now);
    char time_str[20];
    strftime(time_str, sizeof(time_str), "%H:%M:%S", tm_info);

    // 文件名 (去掉路径)
    const char* filename = strrchr(file, '\\');
    if (!filename) filename = strrchr(file, '/');
    if (filename) filename++; else filename = file;

    // 格式化消息
    char msg[2048];
    va_list args;
    va_start(args, fmt);
    vsnprintf(msg, sizeof(msg), fmt, args);
    va_end(args);

    // 输出到控制台
    if (level >= LOG_WARN) {
        fprintf(stderr, "[%s] [%s] %s:%d - %s\n", time_str, level_strings[level], filename, line, msg);
    } else {
        printf("[%s] [%s] %s:%d - %s\n", time_str, level_strings[level], filename, line, msg);
    }

    // 输出到文件
    if (g_log_file) {
        fprintf(g_log_file, "[%s] [%s] %s:%d - %s\n", time_str, level_strings[level], filename, line, msg);
        fflush(g_log_file);
    }
}