from __future__ import annotations

import json

from .html_utils import SafeHtml, attr, escape, trusted
from .icons import _svg_icon


def _top_nav(label: str | None = None, links: SafeHtml | None = None) -> SafeHtml:
    account_html = ""
    if label:
        account_html = f'<span class="navbar-text nav-label text-truncate">{escape(label)}</span>'
    if links is None:
        links = trusted('<a class="nav-link px-0" href="/docs">API</a>')
    theme_toggle = f"""
      <button type="button" class="theme-toggle" data-theme-toggle aria-label="Switch to dark theme">
        {_svg_icon("moon", "theme-icon theme-icon-moon")}
        {_svg_icon("sun", "theme-icon theme-icon-sun")}
      </button>
    """
    return trusted(
        f"""
        <a class="skip-link" href="#main">Skip to content</a>
        <nav class="navbar navbar-expand-sm site-nav" aria-label="Main navigation">
          <div class="container">
            <a class="navbar-brand brand" href="/"><img src="/logo-nav.webp?v=3" alt="" width="28" height="28" decoding="async">KarlDNS</a>
            <div class="navbar-nav site-nav-actions ms-auto flex-row align-items-center justify-content-end gap-2 gap-sm-3">
              {links}
              {account_html}
              {theme_toggle}
            </div>
          </div>
        </nav>
        """
    )


def _site_footer() -> SafeHtml:
    return trusted(
        f"""
        <footer class="site-footer border-top">
          <div class="container footer-inner">
            <div class="footer-made">Made with <span aria-label="love">❤️</span> by karl</div>
            <nav class="footer-links" aria-label="Footer links">
              <a class="footer-link" href="https://github.com/StasonJatham/karldns.de" rel="noopener">
                {_svg_icon("github", "footer-icon")}
                <span>GitHub</span>
              </a>
              <a class="footer-link" href="https://karl.fail" rel="noopener">
                {_svg_icon("blog", "footer-icon")}
                <span>karl.fail</span>
              </a>
              <a class="footer-link" href="https://karlcom.de" rel="noopener">
                {_svg_icon("business", "footer-icon")}
                <span>karlcom.de</span>
              </a>
              <a class="footer-link" href="/docs">
                {_svg_icon("docs", "footer-icon")}
                <span>API</span>
              </a>
              <a class="footer-link" href="/privacy">
                {_svg_icon("privacy", "footer-icon")}
                <span>Legal & privacy</span>
              </a>
            </nav>
          </div>
        </footer>
        """
    )


def _page(
    title: str,
    body: SafeHtml,
    extra_styles: SafeHtml | None = None,
    extra_scripts: SafeHtml | None = None,
    description: str = "KarlDNS is a small self-hosted Dynamic DNS service for FRITZ!Box routers, Linux cron jobs, and home networks.",
    preload_logo: bool = False,
    canonical_url: str | None = None,
    image_url: str | None = None,
    image_alt: str | None = None,
    structured_data: dict[str, object] | None = None,
) -> str:
    if not isinstance(body, SafeHtml):
        raise TypeError("body must be a SafeHtml fragment built by a template helper")
    extra_styles_html = extra_styles or trusted("")
    extra_scripts_html = extra_scripts or trusted("")
    preload_logo_html = trusted('<link rel="preload" as="image" href="/logo.webp?v=3" type="image/webp">') if preload_logo else trusted("")
    canonical_html = trusted(f'<link rel="canonical" href="{attr(canonical_url)}">') if canonical_url else trusted("")
    social_url = canonical_url or ""
    social_image = image_url or ""
    social_html = trusted("")
    if social_url:
        social_card = "summary_large_image" if social_image else "summary"
        social_image_alt = image_alt or title
        social_image_html = f"""
        <meta property="og:image" content="{attr(social_image)}">
        <meta property="og:image:width" content="1200">
        <meta property="og:image:height" content="630">
        <meta property="og:image:alt" content="{attr(social_image_alt)}">
        <meta name="twitter:image" content="{attr(social_image)}">
        <meta name="twitter:image:alt" content="{attr(social_image_alt)}">
        """ if social_image else ""
        social_html = trusted(f"""
        <meta property="og:type" content="website">
        <meta property="og:title" content="{attr(title)}">
        <meta property="og:description" content="{attr(description)}">
        <meta property="og:url" content="{attr(social_url)}">
        {social_image_html}
        <meta name="twitter:card" content="{attr(social_card)}">
        <meta name="twitter:title" content="{attr(title)}">
        <meta name="twitter:description" content="{attr(description)}">
        """)
    structured_data_html = trusted("")
    if structured_data:
        structured_data_html = trusted(
            '<script type="application/ld+json">'
            + escape(json.dumps(structured_data, ensure_ascii=False, separators=(",", ":")))
            + "</script>"
        )
    return f"""
    <!doctype html>
    <html lang="en">
      <head>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <meta name="theme-color" content="#ffffff">
        <meta name="description" content="{attr(description)}">
        {canonical_html}
        {social_html}
        <title>{escape(title)}</title>
        <link rel="icon" href="/favicon.ico" sizes="any">
        <link rel="icon" type="image/png" sizes="32x32" href="/favicon-32x32.png">
        <link rel="icon" type="image/png" sizes="16x16" href="/favicon-16x16.png">
        <link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png">
        <link rel="manifest" href="/site.webmanifest">
        {preload_logo_html}
        <script src="/theme.js?v=2"></script>
        <script src="/clipboard.js?v=3" defer></script>
        {extra_scripts_html}
        <link href="/bootstrap-subset.css?v=3" rel="stylesheet">
        <link href="/app.css?v=12" rel="stylesheet">
        {extra_styles_html}
        {structured_data_html}
      </head>
      <body>{body}{_site_footer()}</body>
    </html>
    """