<?php

declare(strict_types=1);

// JSONL logging with size-based rotation.

function manageErrorLogFile(): string
{
    return manageLogsDir() . "error.log";
}

function manageAccessLogFile(): string
{
    return manageLogsDir() . "access.log";
}

function manageRotateLogFileIfNeeded(string $file): void
{
    $maxBytes = (int) MANAGE_LOG_MAX_BYTES;
    if ($maxBytes < 1 || !is_file($file)) {
        return;
    }

    $size = filesize($file);
    if ($size === false || $size < $maxBytes) {
        manageDeleteExpiredLogFiles($file);
        return;
    }

    $keepFiles = max(1, (int) MANAGE_LOG_KEEP_FILES);
    for ($i = $keepFiles; $i >= 1; $i--) {
        $source = $i === 1 ? $file : $file . "." . ($i - 1);
        $target = $file . "." . $i;
        if (!is_file($source)) {
            continue;
        }
        if ($i === $keepFiles && is_file($target)) {
            @unlink($target);
        }
        @rename($source, $target);
    }

    manageDeleteExpiredLogFiles($file);
}

function manageDeleteExpiredLogFiles(string $file): void
{
    $maxAge = (int) MANAGE_LOG_MAX_AGE_SECONDS;
    if ($maxAge < 1) {
        return;
    }

    foreach (glob($file . ".*") ?: [] as $rotated) {
        $mtime = @filemtime($rotated);
        if ($mtime !== false && time() - $mtime > $maxAge) {
            @unlink($rotated);
        }
    }
}

function manageWriteLogEntry(string $file, array $entry): void
{
    try {
        manageEnsureDirectory(dirname($file));
    } catch (Throwable $exception) {
        return;
    }

    manageRotateLogFileIfNeeded($file);

    $line = json_encode($entry, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
    if ($line === false) {
        return;
    }

    @file_put_contents($file, $line . PHP_EOL, FILE_APPEND | LOCK_EX);
}

function manageLogError(string $message, array $context = [], string $level = "ERROR"): void
{
    manageWriteLogEntry(manageErrorLogFile(), [
        "timestamp" => date("Y-m-d H:i:s.u"),
        "level" => $level,
        "message" => $message,
        "context" => $context,
        "ip" => $_SERVER["REMOTE_ADDR"] ?? "unknown",
        "user_agent" => substr((string) ($_SERVER["HTTP_USER_AGENT"] ?? "unknown"), 0, 300),
        "request_uri" => $_SERVER["REQUEST_URI"] ?? "unknown",
    ]);
}

function manageLogAccess(string $message, array $context = []): void
{
    manageWriteLogEntry(manageAccessLogFile(), [
        "timestamp" => date("Y-m-d H:i:s.u"),
        "message" => $message,
        "context" => $context,
        "ip" => $_SERVER["REMOTE_ADDR"] ?? "unknown",
        "request_method" => $_SERVER["REQUEST_METHOD"] ?? "unknown",
        "request_uri" => $_SERVER["REQUEST_URI"] ?? "unknown",
    ]);
}

// Plain-text append-only log for S3 diagnostics. Kept separate from the JSONL
// logs so the raw provider error stays readable in the management UI.
function manageLogS3(string $message, array $context = []): void
{
    try {
        manageEnsureDirectory(dirname(manageS3LogFile()));
    } catch (Throwable $exception) {
        return;
    }

    $line = date(DATE_ATOM) . " " . $message;
    $encoded = @json_encode($context, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
    if (is_string($encoded) && $encoded !== "[]") {
        $line .= " " . $encoded;
    }

    @file_put_contents(manageS3LogFile(), $line . PHP_EOL, FILE_APPEND | LOCK_EX);
}

function manageLogS3Tail(int $lines): array
{
    $file = manageS3LogFile();
    if (!is_file($file) || $lines < 1) {
        return [];
    }

    $content = @file($file, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
    if (!is_array($content)) {
        return [];
    }

    return array_slice($content, -$lines);
}