<?php

declare(strict_types=1);

namespace Glacier\Core;

/**
 * 极简文件日志：storage/logs/app-YYYYMMDD.log，JSON 行格式。
 * 生产环境只记日志、不输出详情（错误页由入口按 debug 开关决定）。
 */
final class Logger
{
    private static ?string $dir = null;

    public static function init(string $dir): void
    {
        self::$dir = rtrim($dir, '/\\');
        if (!is_dir(self::$dir)) {
            @mkdir(self::$dir, 0775, true);
        }
    }

    public static function info(string $message, array $context = []): void
    {
        self::write('INFO', $message, $context);
    }

    public static function warning(string $message, array $context = []): void
    {
        self::write('WARN', $message, $context);
    }

    public static function error(string $message, array $context = []): void
    {
        self::write('ERROR', $message, $context);
    }

    private static function write(string $level, string $message, array $context): void
    {
        if (self::$dir === null) {
            return;
        }
        $file = self::$dir . '/app-' . date('Y-m-d') . '.log';
        $line = json_encode([
            'ts' => date('Y-m-d H:i:s'),
            'level' => $level,
            'message' => $message,
            'context' => $context,
        ], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
        @file_put_contents($file, $line . PHP_EOL, FILE_APPEND | LOCK_EX);
    }
}