# -*- coding: utf-8 -*-
r'''官网页面渲染（独立模块）。

为什么单独一个文件：
    relay.py 已经 2000+ 行，再塞几百行 HTML 会没法看。
    网站是"展示层"，跟中转逻辑没关系，分开更清楚。
    打包脚本按 relay/*.py 全收，所以拆出去不影响部署。

设计理念（用户要求）：**白色、简洁**。
    底白 #ffffff，浅灰面板 #fafbfc，边框 #e6e8eb，
    正文近黑 #1a1d21，次要灰 #6b7280，主色蓝 #2563eb。
    大量留白，细边框，不用阴影堆砌。

信息结构（参考成熟产品站）：
    吸顶导航 -> Hero（标题+副标题+两个 CTA）-> 功能网格
    -> 三步上手 -> 下载 -> 常见问题 -> 页脚
'''
from __future__ import annotations

import re
from urllib.parse import quote

# ---------------- 设计令牌 ----------------
BG = "#ffffff"
SURFACE = "#fafbfc"
BORDER = "#e6e8eb"
TEXT = "#1a1d21"
MUTED = "#6b7280"
FAINT = "#9ca3af"
ACCENT = "#2563eb"
OK = "#16a34a"

# 内联 SVG 图标（不引外部资源，省得被墙/慢）
_ICONS = {
    "screen": '<path d="M3 5h18v11H3z"/><path d="M1 20h22"/>',
    "play": '<path d="M6 4l14 8-14 8z"/>',
    "image": '<rect x="3" y="4" width="18" height="16" rx="2"/>'
             '<circle cx="8.5" cy="9.5" r="1.5"/><path d="M21 16l-5-5-9 9"/>',
    "file": '<path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"/>'
            '<path d="M14 2v6h6"/>',
    "shield": '<path d="M12 2l8 4v6c0 5-3.5 8.5-8 10-4.5-1.5-8-5-8-10V6z"/>',
    "power": '<path d="M12 2v10"/><path d="M6 6a9 9 0 1 0 12 0"/>',
    "watch": '<rect x="6" y="6" width="12" height="12" rx="3"/>'
             '<path d="M9 6V3h6v3M9 18v3h6v-3"/>',
    "wifi": '<path d="M5 12.5a10 10 0 0 1 14 0"/>'
            '<path d="M8.5 16a5.5 5.5 0 0 1 7 0"/><circle cx="12" cy="19.5" r="1"/>',
    "lock": '<rect x="4" y="10" width="16" height="11" rx="2"/>'
            '<path d="M8 10V7a4 4 0 0 1 8 0v3"/>',
}


def _icon(name: str, size: int = 22) -> str:
    body = _ICONS.get(name, "")
    return (
        '<svg width="%d" height="%d" viewBox="0 0 24 24" fill="none" '
        'stroke="currentColor" stroke-width="1.8" stroke-linecap="round" '
        'stroke-linejoin="round">%s</svg>' % (size, size, body)
    )


FEATURES = [
    ("screen", "屏幕查看", "手表上看教室里那台电脑在显示什么，"
                           "顺手一键截屏存到手表"),
    ("play", "课件播放", "放音频、放视频、调音量、静音 —— "
                         "不用走回讲台去点鼠标"),
    ("image", "投图到大屏", "手表上选张图，全屏显示在教室大屏。"
                            "考试时贴个提示特别方便"),
    ("file", "传文件", "课件在两台机器之间来回倒腾，"
                       "不用插 U 盘"),
    ("watch", "课堂专注", "一键限制游戏相关站点、关闭游戏窗口，"
                          "下课一键恢复"),
    ("power", "电源控制", "锁屏、睡眠、关机、重启，"
                          "还能设「30 分钟后自动关机」"),
    ("wifi", "局域网优先", "手表和电脑在同一个 WiFi 时直连，"
                           "几十毫秒，不绕服务器"),
    ("shield", "跨网络", "不在同一个网络时自动走中转，"
                         "办公室也能管教室"),
    ("lock", "可见可控", "屏幕被看时电脑上一定有提示条，"
                         "关不掉；本机随时能掐断"),
]

STEPS = [
    ("电脑端", "在教室那台 Windows 电脑上运行安装包，"
               "填一个 6 位配对码，装完自动后台运行"),
    ("手表端", "在安卓手表上装 APK，首页点「局域网连接」"
               "或「输入配对码连接」"),
    ("连上就用", "配对一次之后，以后打开就自动连，"
                 "不用再输数字"),
]

FAQ = [
    ("手表连不上电脑怎么办？",
     "先确认电脑上程序在运行（任务管理器里找 ykxmz.exe）。"
     "如果被控端窗口提示「防火墙未放行」，点旁边的一键修复。"
     "还是不行就跑一次网络自检 —— 电脑上打开工具箱选 3，"
     "然后手表上点「检查服务器」。"),
    ("为什么显示「延迟 2000 毫秒」这么慢？",
     "跨网络时数据要绕到中转服务器再回来，"
     "延迟取决于你那台小机器的线路。"
     "如果手表和电脑在同一个 WiFi，会自动走局域网直连，"
     "延迟通常只有几十毫秒。"),
    ("需要另外买服务器吗？",
     "只有一个教室用的话不需要 —— 手表和电脑连同一个 WiFi 就能直连。"
     "要在办公室管教室才需要一台能上外网的小机器当中转。"),
    ("配对码忘了怎么办？",
     "电脑上双击程序图标打开窗口就能看到。"
     "也可以在窗口里改一个自己好记的。"),
    ("手表重装了还能连上原来的电脑吗？",
     "能。重新输一次那个 6 位配对码就行 —— "
     "配对码本身就是钥匙。"),
    ("屏幕被别人看着，我能知道吗？",
     "能。只要有人在看你的屏幕，电脑右上角就会出现一条红色提示条，"
     "没有开关能关掉它。电脑前面的人随时可以点「停止共享」断开。"),
]


def _logo(size: int = 26) -> str:
    """内联 SVG 的 logo。

    为什么不用 <img src="/favicon.ico">：
        ICO 放在 <img> 里各浏览器支持不一致，实测截图里是破图。
        内联 SVG 永远能显示，还不用多一个请求。
    """
    # 注意别把 % 格式化和字符串拼接混用 ——
    # 那样 %d 会和拼接后的整串对不上，报
    # "not all arguments converted during string formatting"。
    # 这里全部用 .format() 拼，清楚也不会踩坑。
    return (
        '<svg width="{s}" height="{s}" viewBox="0 0 32 32" fill="none" '
        'aria-hidden="true">'
        '<rect x="3" y="3" width="26" height="26" rx="8" fill="{c}"/>'
        '<rect x="10" y="9" width="12" height="14" rx="4" '
        'stroke="#fff" stroke-width="2"/>'
        '<path d="M13 9V6h6v3M13 23v3h6v-3" stroke="#fff" '
        'stroke-width="2" stroke-linecap="round"/>'
        '</svg>'
    ).format(s=size, c=ACCENT)


def _download_cards(files: list) -> str:
    """三个下载卡片。files 是 _list_downloads() 的结果。"""
    def pick(suffix, keyword=""):
        for item in files:
            name = item["name"].lower()
            if name.endswith(suffix) and (not keyword or keyword in name):
                return item
        return None

    specs = [
        ("电脑端", "教室那台 Windows 电脑", "安装包",
         pick(".exe"), "装完自动后台运行", "Windows 10 / 11"),
        ("手表端", "安卓手表", "APK",
         pick(".apk"), "直接安装，不用 root", "Android 7.0+"),
        ("服务器端", "一台能上外网的小机器", "压缩包",
         pick(".zip", "server"), "只在跨网络时才需要", "Debian / Ubuntu"),
    ]

    cards = []
    for title, who, tag, item, note, req in specs:
        if item:
            mb = item["size"] / 1024 / 1024
            size = ("%.1f MB" % mb) if mb >= 0.1 else ("%.0f KB" % (item["size"] / 1024))
            action = (
                '<a class="dl-btn" href="/download/%s">下载 %s</a>'
                '<div class="dl-file">%s · %s</div>'
                % (quote(item["name"]), tag, item["name"], size)
            )
        else:
            action = '<div class="dl-soon">暂未上传</div>'

        cards.append(
            '<div class="dl-card">'
            '<div class="dl-head"><span class="dl-tag">%s</span>'
            '<span class="dl-who">%s</span></div>'
            '<div class="dl-note">%s</div>'
            '%s'
            '<div class="dl-req">%s</div>'
            '</div>' % (title, who, note, action, req)
        )
    return "".join(cards)


def _feature_cards() -> str:
    out = []
    for icon, title, desc in FEATURES:
        out.append(
            '<div class="feat"><div class="feat-icon">%s</div>'
            '<div class="feat-title">%s</div>'
            '<div class="feat-desc">%s</div></div>'
            % (_icon(icon), title, desc)
        )
    return "".join(out)


def _step_cards() -> str:
    out = []
    for index, (title, desc) in enumerate(STEPS, 1):
        out.append(
            '<div class="step"><div class="step-num">%d</div>'
            '<div class="step-title">%s</div>'
            '<div class="step-desc">%s</div></div>' % (index, title, desc)
        )
    return "".join(out)


def _faq_items() -> str:
    out = []
    for question, answer in FAQ:
        out.append(
            '<details class="faq"><summary>%s<span class="faq-mark">'
            '</span></summary><div class="faq-body">%s</div></details>'
            % (question, answer)
        )
    return "".join(out)


def _version(files: list) -> str:
    for item in files:
        found = re.search(r"(\d+\.\d+\.\d+)", item["name"])
        if found:
            return found.group(1)
    return ""


SITE_CSS = """
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",
     "Microsoft YaHei","PingFang SC",sans-serif;
     background:%(BG)s;color:%(TEXT)s;line-height:1.75;
     -webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.wrap{max-width:960px;margin:0 auto;padding:0 24px}

/* 吸顶导航 */
nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);
    backdrop-filter:saturate(180%%) blur(12px);
    border-bottom:1px solid %(BORDER)s}
.nav-in{display:flex;align-items:center;justify-content:space-between;
        height:60px}
.brand{display:flex;align-items:center;gap:9px;font-weight:700;
       font-size:17px;letter-spacing:-.2px}
.brand img{width:26px;height:26px;border-radius:7px}
.nav-links{display:flex;gap:26px;font-size:14px;color:%(MUTED)s}
.nav-links a:hover{color:%(TEXT)s}

/* Hero */
.hero{padding:88px 0 72px;text-align:center}
.hero h1{font-size:46px;line-height:1.2;letter-spacing:-1.2px;
         font-weight:800;margin-bottom:18px}
.hero p{font-size:18px;color:%(MUTED)s;max-width:600px;margin:0 auto 34px}
.cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;
     padding:12px 26px;border-radius:10px;font-weight:600;font-size:15px;
     transition:all .15s}
.btn-p{background:%(ACCENT)s;color:#fff}
.btn-p:hover{background:#1d4ed8;transform:translateY(-1px)}
.btn-s{background:%(SURFACE)s;color:%(TEXT)s;
       border:1px solid %(BORDER)s}
.btn-s:hover{border-color:#d1d5db;background:#f3f4f6}
.badge{display:inline-block;margin-top:22px;padding:4px 14px;
       border-radius:999px;background:#eff6ff;color:%(ACCENT)s;
       font-size:13px;font-weight:600}

/* 通用区段 */
section{padding:72px 0;border-top:1px solid %(BORDER)s}
.sec-head{text-align:center;margin-bottom:48px}
.sec-head h2{font-size:30px;letter-spacing:-.6px;font-weight:700;
             margin-bottom:10px}
.sec-head p{color:%(MUTED)s;font-size:16px}

/* 功能网格 */
.feats{display:grid;gap:1px;background:%(BORDER)s;
       border:1px solid %(BORDER)s;border-radius:14px;overflow:hidden}
@media(min-width:640px){.feats{grid-template-columns:repeat(3,1fr)}}
.feat{background:%(BG)s;padding:28px 24px}
.feat-icon{color:%(ACCENT)s;margin-bottom:14px}
.feat-title{font-weight:650;font-size:16px;margin-bottom:6px}
.feat-desc{color:%(MUTED)s;font-size:14px;line-height:1.7}

/* 三步 */
.steps{display:grid;gap:20px}
@media(min-width:640px){.steps{grid-template-columns:repeat(3,1fr)}}
.step{padding:26px 22px;border:1px solid %(BORDER)s;border-radius:14px;
      background:%(SURFACE)s}
.step-num{width:30px;height:30px;border-radius:50%%;background:%(ACCENT)s;
          color:#fff;display:flex;align-items:center;justify-content:center;
          font-weight:700;font-size:14px;margin-bottom:14px}
.step-title{font-weight:650;font-size:16px;margin-bottom:6px}
.step-desc{color:%(MUTED)s;font-size:14px;line-height:1.7}

/* 下载 */
.dls{display:grid;gap:16px}
@media(min-width:760px){.dls{grid-template-columns:repeat(3,1fr)}}
.dl-card{border:1px solid %(BORDER)s;border-radius:14px;padding:24px 20px;
         display:flex;flex-direction:column;background:%(BG)s;
         transition:border-color .15s}
.dl-card:hover{border-color:#d1d5db}
.dl-head{display:flex;align-items:baseline;gap:8px;margin-bottom:4px}
.dl-tag{font-weight:700;font-size:17px}
.dl-who{color:%(FAINT)s;font-size:13px}
.dl-note{color:%(MUTED)s;font-size:13px;margin-bottom:18px;flex:1}
.dl-btn{display:block;text-align:center;background:%(ACCENT)s;color:#fff;
        padding:11px 16px;border-radius:9px;font-weight:600;font-size:14px;
        transition:background .15s}
.dl-btn:hover{background:#1d4ed8}
.dl-file{color:%(FAINT)s;font-size:11px;margin-top:9px;text-align:center;
         word-break:break-all}
.dl-soon{text-align:center;color:%(FAINT)s;font-size:14px;padding:11px 0;
         border:1px dashed %(BORDER)s;border-radius:9px}
.dl-req{color:%(FAINT)s;font-size:12px;margin-top:12px;text-align:center}

/* FAQ */
.faqs{max-width:720px;margin:0 auto}
.faq{border-bottom:1px solid %(BORDER)s}
.faq summary{padding:20px 0;font-weight:600;font-size:16px;cursor:pointer;
             list-style:none;display:flex;justify-content:space-between;
             align-items:center;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq-mark{width:9px;height:9px;border-right:2px solid %(FAINT)s;
          border-bottom:2px solid %(FAINT)s;transform:rotate(45deg);
          transition:transform .2s;flex:none;margin-right:4px}
.faq[open] .faq-mark{transform:rotate(-135deg)}
.faq-body{color:%(MUTED)s;font-size:15px;padding:0 0 22px;line-height:1.8}

/* 页脚 */
footer{padding:52px 0 64px;border-top:1px solid %(BORDER)s;
       color:%(MUTED)s;font-size:14px}
.foot-in{display:flex;justify-content:space-between;gap:24px;
         flex-wrap:wrap;align-items:center}
.foot-links{display:flex;gap:22px}
.foot-links a:hover{color:%(TEXT)s}
.copy{color:%(FAINT)s;font-size:13px;margin-top:26px;text-align:center}
""" % {"BG": BG, "SURFACE": SURFACE, "BORDER": BORDER, "TEXT": TEXT,
       "MUTED": MUTED, "FAINT": FAINT, "ACCENT": ACCENT}


def render_site(files: list) -> str:
    """渲染官网首页。files 是 _list_downloads() 的结果。"""
    version = _version(files)
    badge = ("最新版 " + version) if version else ""

    return ("""<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1">
<title>ykxmz · 教室电脑手表遥控</title>
<meta name="description" content="老师用手表管教室里那台电脑：\u653e\u8bfe\u4ef6\u3001\u6295\u56fe\u3001\u4e0b\u8bfe\u5173\u673a\uff0c\u4e0d\u7528\u8d70\u56de\u8bb2\u53f0\u3002">
<link rel="icon" href="/favicon.ico">
<style>%(css)s</style>
</head>
<body>

<nav><div class="wrap nav-in">
  <a class="brand" href="/">
    __LOGO__
    <span>ykxmz</span>
  </a>
  <div class="nav-links">
    <a href="#features">功能</a>
    <a href="#how">怎么用</a>
    <a href="#download">下载</a>
    <a href="#faq">常见问题</a>
  </div>
</div></nav>

<div class="wrap hero">
  <h1>老师抬一下手腕<br>就能管教室那台电脑</h1>
  <p>放课件、放音频、投图到大屏、看看有没有人在跑无关程序、下课关机 ——
     不用走回讲台去点鼠标。</p>
  <div class="cta">
    <a class="btn btn-p" href="#download">下载安装</a>
    <a class="btn btn-s" href="#how">先看看怎么用</a>
  </div>
  %(badge)s
</div>

<section id="features"><div class="wrap">
  <div class="sec-head">
    <h2>上课用得上的，基本都在这</h2>
    <p>手表上十个分页，常用操作都在第一屏</p>
  </div>
  <div class="feats">%(feats)s</div>
</div></section>

<section id="how"><div class="wrap">
  <div class="sec-head">
    <h2>三步装好</h2>
    <p>电脑装一个程序，手表装一个 App，一台电脑配一次就行</p>
  </div>
  <div class="steps">%(steps)s</div>
</div></section>

<section id="download"><div class="wrap">
  <div class="sec-head">
    <h2>下载</h2>
    <p>%(_dlsub)s</p>
  </div>
  <div class="dls">%(dls)s</div>
</div></section>

<section id="faq"><div class="wrap">
  <div class="sec-head"><h2>常见问题</h2></div>
  <div class="faqs">%(faq)s</div>
</div></section>

<footer><div class="wrap">
  <div class="foot-in">
    <div class="brand">__LOGO__<span>ykxmz</span></div>
    <div class="foot-links">
      <a href="https://gitee.com/xmz7891/ykxmz" target="_blank" rel="noopener">源码</a>
      <a href="https://gitee.com/xmz7891/ykxmz/releases" target="_blank" rel="noopener">历史版本</a>
      <a href="#faq">常见问题</a>
    </div>
  </div>
  <div class="copy">ykxmz · 教室电脑手表遥控</div>
</div></footer>

<script>
// 点导航链接后收起移动端（这里没做汉堡菜单，留个锚点平滑滚动就行）
document.querySelectorAll('a[href^="#"]').forEach(function (a) {
  a.addEventListener('click', function (e) {
    var target = document.querySelector(a.getAttribute('href'));
    if (target) { e.preventDefault(); target.scrollIntoView({behavior:'smooth'}); }
  });
});
</script>
</body>
</html>""" % {
        "css": SITE_CSS,
        "badge": '<div class="badge">%s</div>' % badge if badge else "",
        "feats": _feature_cards(),
        "steps": _step_cards(),
        "dls": _download_cards(files),
        "faq": _faq_items(),
        "_dlsub": ("当前版本 " + version) if version
                  else "选择你的设备",
    }).replace("__LOGO__", _logo())