<?php
/**
 * 简航 SimpleNav —— 数据库（PDO SQLite）
 * 首次访问自动建表并写入默认数据（含从 n.yangyq.net 迁移的常用/工具/合集链接）。
 */
declare(strict_types=1);

require_once __DIR__ . '/config.php';

function db(): PDO
{
    static $pdo = null;
    if ($pdo === null) {
        if (!is_dir(DATA_PATH)) {
            @mkdir(DATA_PATH, 0755, true);
        }
        $pdo = new PDO('sqlite:' . DB_PATH);
        $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
        $pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
        $pdo->exec('PRAGMA foreign_keys = ON');
        db_init($pdo);
    }
    return $pdo;
}

function db_init(PDO $pdo): void
{
    $pdo->exec(<<<'SQL'
CREATE TABLE IF NOT EXISTS groups (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  name TEXT NOT NULL,
  slug TEXT DEFAULT '',
  display TEXT NOT NULL DEFAULT 'grid',   -- grid=普通网格板块  tabs=合集标签页
  sort_order INTEGER NOT NULL DEFAULT 0,
  is_visible INTEGER NOT NULL DEFAULT 1
);
CREATE TABLE IF NOT EXISTS sites (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  group_id INTEGER NOT NULL,
  url TEXT NOT NULL,
  name TEXT NOT NULL DEFAULT '',          -- 自动抓取的网站名称
  short_name TEXT NOT NULL DEFAULT '',    -- 用户自定义简称（页面展示用）
  icon TEXT NOT NULL DEFAULT '',          -- 本地图标文件名
  sort_order INTEGER NOT NULL DEFAULT 0,
  is_visible INTEGER NOT NULL DEFAULT 1,
  created_at TEXT DEFAULT '',
  updated_at TEXT DEFAULT '',
  FOREIGN KEY (group_id) REFERENCES groups(id) ON DELETE CASCADE
);
CREATE TABLE IF NOT EXISTS engines (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  name TEXT NOT NULL,
  slug TEXT NOT NULL,
  search_url TEXT NOT NULL,
  param TEXT NOT NULL DEFAULT 'q',
  suggest_url TEXT NOT NULL DEFAULT '',
  suggest_type TEXT NOT NULL DEFAULT '',
  color TEXT NOT NULL DEFAULT '#2F6BF7',
  is_active INTEGER NOT NULL DEFAULT 0,
  sort_order INTEGER NOT NULL DEFAULT 0
);
CREATE TABLE IF NOT EXISTS settings (
  k TEXT PRIMARY KEY,
  v TEXT NOT NULL DEFAULT ''
);
CREATE TABLE IF NOT EXISTS users (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  username TEXT UNIQUE NOT NULL,
  password_hash TEXT NOT NULL,
  created_at TEXT NOT NULL DEFAULT ''
);
SQL);

    // 是否为空库（用于判断是否写入默认数据）
    $isEmpty = (int)$pdo->query('SELECT COUNT(*) FROM groups')->fetchColumn() === 0;

    seed_settings($pdo);
    seed_engines($pdo);
    if ($isEmpty) {
        seed_groups_and_sites($pdo);
    }
}

function seed_settings(PDO $pdo): void
{
    $defaults = [
        'site_name' => '简航',
        'subtitle' => '个人网站导航',
        'default_engine' => 'bing',
        'primary_color' => '#2F6BF7',
        'open_blank' => '1',
    ];
    $stmt = $pdo->prepare('INSERT OR IGNORE INTO settings (k, v) VALUES (?, ?)');
    foreach ($defaults as $k => $v) {
        $stmt->execute([$k, $v]);
    }
}

function seed_engines(PDO $pdo): void
{
    if ((int)$pdo->query('SELECT COUNT(*) FROM engines')->fetchColumn() > 0) {
        return;
    }
    // name, slug, search_url, param, suggest_url, suggest_type, color, active, sort
    $rows = [
        ['必应', 'bing',   'https://cn.bing.com/search',        'q',     'https://api.bing.com/osjson.aspx?query={q}',                                  'bing_osjson',  '#60A504', 1, 1],
        ['百度', 'baidu',  'https://www.baidu.com/s',           'wd',    'https://www.baidu.com/sugrec?prod=pc&wd={q}',                                 'baidu_sugrec', '#2100E0', 1, 2],
        ['谷歌', 'google', 'https://www.google.com/search',     'q',     'https://suggestqueries.google.com/complete/search?client=firefox&q={q}',      'google_firefox','#3B83FA', 0, 3],
        ['搜狗', 'sogou',  'https://www.sogou.com/web',         'query', 'https://www.sogou.com/suggnew/ajajjson?type=web&key={q}',                     'sogou_ajaj',   '#FE6B14', 0, 4],
        ['360',  'so360',  'https://www.so.com/s',              'q',     'https://sug.so.360.cn/suggest?encodein=utf-8&encodeout=utf-8&format=json&word={q}', 'so360',  '#1BB04A', 0, 5],
        ['DuckGo','ddg',   'https://duckduckgo.com/',           'q',     'https://duckduckgo.com/ac/?type=list&q={q}',                                  'ddg',          '#DE5833', 0, 6],
    ];
    $stmt = $pdo->prepare('INSERT INTO engines (name,slug,search_url,param,suggest_url,suggest_type,color,is_active,sort_order) VALUES (?,?,?,?,?,?,?,?,?)');
    foreach ($rows as $r) {
        $stmt->execute($r);
    }
}

function seed_groups_and_sites(PDO $pdo): void
{
    // 板块定义： [名称, 类型, 排序, [ [名称, 网址], ... ] ]
    $data = [
        ['常用', 'grid', 1, [
            ['海大', 'http://www.ouc.edu.cn/'],
            ['阿里云', 'https://www.aliyun.com/'],
            ['知乎', 'https://www.zhihu.com/'],
            ['天翼云盘', 'https://cloud.189.cn/'],
            ['快科技', 'http://www.mydrivers.com/'],
            ['轻舟', 'https://yangjh.net/'],
            ['老杨', 'https://yangyq.net/'],
            ['红围脖', 'https://hongbowei.com/'],
        ]],
        ['工具', 'grid', 2, [
            ['宝塔', 'https://bt.yangyq.net:8868/44d5b346'],
            ['海大VPN', 'https://otrust.ouc.edu.cn'],
            ['BB系统', 'https://wlkc.ouc.edu.cn/'],
            ['教务系统', 'http://jwgl.ouc.edu.cn/'],
            ['信息门户', 'http://my.ouc.edu.cn/'],
            ['信息学部', 'http://it.ouc.edu.cn/'],
            ['淘宝', 'https://www.taobao.com/'],
            ['京东', 'https://www.jd.com/'],
            ['日历', 'https://nas.yangyq.net/calendar'],
            ['办公Nas', 'https://nas.yangyq.net/'],
            ['家庭Nas', 'https://home.yangyq.net/'],
            ['Git', 'https://git.yangyq.net/'],
            ['网盘', 'https://nas.yangyq.net/drive/'],
            ['电影', 'https://movie.yangyq.net/'],
            ['相册', 'https://home.yangyq.net/photo'],
            ['文件', 'https://nas.yangyq.net/file'],
            ['bilibili', 'https://www.bilibili.com/'],
            ['优酷', 'https://www.youku.com/'],
            ['爱奇艺', 'https://www.iqiyi.com/'],
            ['腾讯视频', 'https://v.qq.com/'],
            ['芒果TV', 'https://www.mgtv.com/'],
            ['Draw.IO', 'https://draw.yangyq.net'],
            ['稿定PS', 'https://ps.gaoding.com/'],
            ['密码生成', 'https://n.yangyq.net/password/'],
            ['PDF工具', 'https://pdf.wps.cn/'],
            ['微信读书', 'https://weread.qq.com/'],
            ['高德地图', 'https://gaode.com/'],
            ['百度地图', 'https://map.baidu.com/'],
            ['建设银行', 'http://ccb.com/cn/home/index.html'],
            ['海大财务', 'http://hdcw.ouc.edu.cn'],
            ['MOOC', 'https://www.icourse163.org/'],
        ]],
        ['常用软件', 'tabs', 10, [
            ['WPS', 'https://www.wps.cn/'],
            ['Chrome', 'https://www.google.cn/chrome/index.html'],
            ['VS Code', 'https://code.visualstudio.com/'],
            ['Draw.IO', 'https://github.com/jgraph/drawio-desktop/releases'],
            ['火绒', 'https://www.huorong.cn/'],
            ['7-Zip', 'https://sparanoid.com/lab/7z/'],
            ['Tabby', 'https://github.com/Eugeny/tabby/'],
            ['GitAhead', 'https://gitahead.github.io/gitahead.com/'],
            ['Everything', 'https://www.voidtools.com/zh-cn/'],
            ['Wox', 'https://github.com/Wox-launcher/Wox'],
            ['BCUninstaller', 'https://github.com/Klocman/Bulk-Crap-Uninstaller'],
            ['DBeaver', 'https://github.com/dbeaver/dbeaver'],
            ['Thunderbird', 'https://www.thunderbird.net/zh-CN/'],
            ['FDM', 'https://www.freedownloadmanager.org/zh/'],
            ['GIMP', 'https://www.gimp.org/'],
            ['VLC', 'https://www.videolan.org/vlc/'],
            ['Zotero', 'https://www.zotero.org/'],
            ['QQ音乐', 'https://y.qq.com/'],
            ['微信', 'https://weixin.qq.com/'],
            ['TIM', 'https://tim.qq.com/'],
            ['Shotcut', 'https://github.com/mltframework/shotcut'],
        ]],
        ['图片资源', 'tabs', 11, [
            ['图标库', 'https://www.iconfont.cn/'],
            ['插画库', 'https://undraw.co/illustrations'],
            ['Pixabay', 'https://pixabay.com/zh/'],
            ['Pexels', 'https://www.pexels.com/'],
        ]],
        ['科研论文', 'tabs', 12, [
            ['DeepL翻译', 'https://www.deepl.com/'],
            ['Linggle', 'https://linggle.com/'],
            ['Netspeak', 'https://netspeak.org/'],
            ['Semantic Scholar', 'https://www.semanticscholar.org/'],
            ['LaTex Table', 'https://www.tablesgenerator.com/'],
        ]],
    ];

    $g = $pdo->prepare('INSERT INTO groups (name, slug, display, sort_order, is_visible) VALUES (?,?,?,?,1)');
    $s = $pdo->prepare('INSERT INTO sites (group_id, url, name, short_name, icon, sort_order, is_visible, created_at, updated_at) VALUES (?,?,?,?,\'\',?,1,?,?)');
    $now = date('Y-m-d H:i:s');
    foreach ($data as $row) {
        [$name, $display, $order, $sites] = $row;
        $g->execute([$name, slugify($name), $display, $order]);
        $gid = (int)$pdo->lastInsertId();
        $i = 0;
        foreach ($sites as $site) {
            $s->execute([$gid, $site[1], $site[0], $site[0], $i++, $now, $now]);
        }
    }
}

/** 生成 slug（中文退化为拼音不可用时用 md5 短串） */
function slugify(string $s): string
{
    $s = trim($s);
    if (preg_match('/^[a-z0-9\-]+$/i', $s)) {
        return strtolower($s);
    }
    return 'g' . substr(md5($s), 0, 6);
}