<?php
if (!defined('__TYPECHO_ROOT_DIR__')) {
    define('__TYPECHO_ROOT_DIR__', dirname(__DIR__, 3));
}

require_once __TYPECHO_ROOT_DIR__ . '/config.inc.php';

define('CIYUN_PUBLISHER_VERSION', '1.0.0');

class CiyunPublisher_Action
{
}

try {
    if (($_SERVER['REQUEST_METHOD'] ?? '') !== 'POST') {
        ciyun_response(405, ['success' => false, 'message' => 'Only POST is allowed']);
    }
    if (stripos($_SERVER['CONTENT_TYPE'] ?? '', 'application/json') === false) {
        ciyun_response(400, ['success' => false, 'message' => 'Content-Type must be application/json']);
    }
    $config = ciyun_config();
    ciyun_check_token($config);
    ciyun_check_ip($config);
    $data = json_decode(file_get_contents('php://input'), true);
    if (!is_array($data)) {
        ciyun_response(400, ['success' => false, 'message' => 'Invalid JSON']);
    }
    if (($data['action'] ?? '') === 'self_check') {
        ciyun_response(200, ciyun_self_check($config));
    }
    if (($data['action'] ?? '') === 'version') {
        ciyun_response(200, ciyun_version_payload());
    }
    if (($data['action'] ?? '') === 'logs') {
        ciyun_response(200, ['success' => true, 'items' => ciyun_recent_logs(intval($data['limit'] ?? 50))]);
    }
    if (($data['action'] ?? '') === 'terms') {
        ciyun_response(200, ['success' => true, 'items' => ciyun_terms($data['type'] ?? 'category')]);
    }
    ciyun_validate($data);
    $postId = ciyun_save_article($data, $config);
    ciyun_log('success', $data['title'], 'post_id=' . $postId);
    ciyun_response(200, ['success' => true, 'post_id' => $postId, 'message' => '发布成功']);
} catch (Throwable $e) {
    ciyun_log('error', '', $e->getMessage());
    ciyun_response(500, ['success' => false, 'message' => '服务器错误', 'error' => $e->getMessage()]);
}

function ciyun_config()
{
    try {
        $options = Typecho_Widget::widget('Widget_Options');
        $plugin = $options->plugin('CiyunPublisher');
        return [
            'token' => (string)($plugin->token ?? ''),
            'whitelist_ips' => (string)($plugin->whitelist_ips ?? ''),
            'force_draft' => (string)($plugin->force_draft ?? '1'),
        ];
    } catch (Throwable $e) {
        return ['token' => '', 'whitelist_ips' => '', 'force_draft' => '1'];
    }
}

function ciyun_self_check($config)
{
    return [
        'success' => true,
        'message' => 'self_check ok',
        'checks' => [
            'token' => strlen($config['token'] ?? '') >= 32,
            'log_writable' => ciyun_log_writable(),
            'categories' => count(ciyun_terms('category')),
            'authors' => count(ciyun_terms('author')),
            'force_draft' => ($config['force_draft'] ?? '1') === '1',
        ],
        'api' => '/usr/plugins/CiyunPublisher/Action.php',
        'version' => CIYUN_PUBLISHER_VERSION,
    ];
}

function ciyun_version_payload()
{
    return [
        'success' => true,
        'name' => 'CiyunPublisher',
        'cms' => 'typecho',
        'version' => CIYUN_PUBLISHER_VERSION,
    ];
}

function ciyun_recent_logs($limit)
{
    $limit = max(1, min($limit, 200));
    $file = __DIR__ . '/publish.log';
    if (!file_exists($file)) {
        return [];
    }
    $lines = file($file, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
    if (!is_array($lines)) {
        return [];
    }
    $items = [];
    foreach (array_reverse(array_slice($lines, -$limit)) as $line) {
        $parts = explode("\t", $line, 5);
        $items[] = [
            'time' => $parts[0] ?? '',
            'ip' => $parts[1] ?? '',
            'status' => $parts[2] ?? '',
            'title' => $parts[3] ?? '',
            'message' => $parts[4] ?? '',
        ];
    }
    return $items;
}

function ciyun_terms($type)
{
    if ($type === 'author') {
        return ciyun_authors();
    }
    if ($type === 'tag') {
        return [];
    }
    return ciyun_categories();
}

function ciyun_categories()
{
    $items = [];
    try {
        $db = Typecho_Db::get();
        $prefix = $db->getPrefix();
        $rows = $db->fetchAll($db->select('mid', 'name')->from($prefix . 'metas')->where('type = ?', 'category'));
        foreach ($rows as $row) {
            $items[] = ['id' => intval($row['mid']), 'name' => (string)$row['name']];
        }
    } catch (Throwable $e) {
        return [];
    }
    return $items;
}

function ciyun_authors()
{
    $items = [];
    try {
        $db = Typecho_Db::get();
        $prefix = $db->getPrefix();
        $rows = $db->fetchAll($db->select('uid', 'screenName', 'name')->from($prefix . 'users'));
        foreach ($rows as $row) {
            $name = trim((string)($row['screenName'] ?: $row['name']));
            if (intval($row['uid']) > 0 && $name !== '') {
                $items[] = ['id' => intval($row['uid']), 'name' => $name];
            }
        }
    } catch (Throwable $e) {
        return [];
    }
    return $items;
}

function ciyun_save_article($data, $config)
{
    $db = Typecho_Db::get();
    $prefix = $db->getPrefix();
    $isDraft = ($config['force_draft'] ?? '1') === '1' || ($data['status'] ?? 'draft') !== 'publish';
    $created = !empty($data['created_at']) ? strtotime($data['created_at']) : time();
    $authorId = intval($data['author_id'] ?? 1);
    $categoryId = intval($data['category_id'] ?? 0);
    $slug = trim((string)($data['slug'] ?? ''));
    $post = [
        'title' => $data['title'],
        'slug' => $slug !== '' ? $slug : null,
        'created' => $created,
        'modified' => time(),
        'text' => '<!--markdown-->' . $data['content'],
        'order' => 0,
        'authorId' => $authorId > 0 ? $authorId : 1,
        'template' => null,
        'type' => 'post',
        'status' => $isDraft ? 'draft' : 'publish',
        'password' => null,
        'commentsNum' => 0,
        'allowComment' => 1,
        'allowPing' => 1,
        'allowFeed' => 1,
        'parent' => 0,
    ];
    $postId = $db->query($db->insert($prefix . 'contents')->rows($post));
    if ($categoryId > 0) {
        $db->query($db->insert($prefix . 'relationships')->rows(['cid' => $postId, 'mid' => $categoryId]));
    }
    return $postId;
}

function ciyun_check_token($config)
{
    $token = (string)($config['token'] ?? '');
    $header = $_SERVER['HTTP_AUTHORIZATION'] ?? '';
    if (strlen($token) < 32 || !preg_match('/Bearer\s+(.+)/i', $header, $m) || !hash_equals($token, trim($m[1]))) {
        ciyun_log('unauthorized', '', 'Token error');
        ciyun_response(401, ['success' => false, 'message' => 'Token 错误']);
    }
}

function ciyun_check_ip($config)
{
    $list = preg_split('/[\s,]+/', trim((string)($config['whitelist_ips'] ?? '')));
    $list = array_filter($list);
    if ($list && !in_array($_SERVER['REMOTE_ADDR'] ?? '', $list, true)) {
        ciyun_response(401, ['success' => false, 'message' => 'IP 不在白名单']);
    }
}

function ciyun_validate($data)
{
    if (empty($data['title']) || empty($data['content'])) {
        ciyun_response(400, ['success' => false, 'message' => 'title 和 content 必填']);
    }
    if (ciyun_strlen($data['title']) > 200 || ciyun_strlen($data['content']) > 200000) {
        ciyun_response(400, ['success' => false, 'message' => '标题或正文过长']);
    }
}

function ciyun_strlen($value)
{
    return function_exists('mb_strlen') ? mb_strlen($value, 'UTF-8') : strlen($value);
}

function ciyun_log_writable()
{
    $file = __DIR__ . '/publish.log';
    if (file_exists($file)) {
        return is_writable($file);
    }
    return is_writable(__DIR__);
}

function ciyun_log($status, $title, $message)
{
    $line = date('Y-m-d H:i:s') . "\t" . ($_SERVER['REMOTE_ADDR'] ?? '') . "\t" . $status . "\t" . str_replace(["\r", "\n"], ' ', $title) . "\t" . str_replace(["\r", "\n"], ' ', $message) . PHP_EOL;
    file_put_contents(__DIR__ . '/publish.log', $line, FILE_APPEND);
}

function ciyun_response($code, $payload)
{
    http_response_code($code);
    header('Content-Type: application/json; charset=utf-8');
    echo json_encode($payload, JSON_UNESCAPED_UNICODE);
    exit;
}
