/* Shared app navigation — one source of truth across all pages (no build step).
   Desktop (>=769px): a fixed left sidebar. Mobile (<=768px): a slide-in drawer
   behind a ☰ button — but ONLY on pages that don't already ship their own mobile
   menu (the chat page has its own hamburger + tab bar, so we leave it alone). */
(function () {
  const ITEMS = [
    { href: "/",        icon: "💬", label: "Chat" },
    { href: "/session", icon: "♠",  label: "Session" },
    { href: "/history", icon: "📚", label: "History" },
    { href: "/hands",   icon: "🃏", label: "Hands" },
    { href: "/self",    icon: "🧠", label: "Mind" },
    { href: "/thoughts", icon: "💭", label: "Thoughts" },
    { href: "/journal", icon: "📔", label: "Journal" },
    { href: "/logs",    icon: "📜", label: "Logs" },
  ];

  const path = location.pathname;
  function isActive(href) {
    if (href === "/") return path === "/" || path === "";
    if (href === "/hands") return path === "/hands" || path.indexOf("/hand") === 0;
    if (href === "/history") return path.indexOf("/history") === 0 || path.indexOf("/recap") === 0;
    return path === href || path.indexOf(href + "/") === 0;
  }

  // Visual styling (all sizes); positioning differs per breakpoint below.
  const css = `
    #app-nav { display: none; flex-direction: column; gap: 2px; box-sizing: border-box;
      padding: 14px 10px; background: #0b0b0b; border-right: 1px solid #2a1d12;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
    #app-nav .brand { display: flex; align-items: center; gap: 8px; text-decoration: none;
      color: #ff7a00; font-weight: 700; font-size: 1.15rem; letter-spacing: .5px; padding: 6px 11px 14px; }
    #app-nav .brand .dot { width: 8px; height: 8px; border-radius: 50%;
      background: #8fd694; box-shadow: 0 0 8px rgba(143,214,148,.6); }
    #app-nav .navitem { display: flex; align-items: center; gap: 11px; width: 100%; text-align: left;
      padding: 9px 11px; border-radius: 9px; border: none; background: none; color: #cfcfcf;
      text-decoration: none; font-size: .95rem; cursor: pointer; font-family: inherit;
      -webkit-tap-highlight-color: transparent; }
    #app-nav .navitem .i { font-size: 1.05rem; width: 20px; text-align: center; filter: grayscale(.3); }
    #app-nav .navitem:hover { background: rgba(255,122,0,.08); color: #fff; }
    #app-nav .navitem.active { background: rgba(255,122,0,.14); color: #ff7a00; }
    #app-nav .navitem.active .i { filter: none; }
    #app-nav .spacer { flex: 1; }
    #app-nav-burger { display: none; }
    #app-nav-scrim { display: none; }

    @media screen and (min-width: 769px) {
      body { padding-left: 212px; }
      #app-nav { display: flex; position: fixed; left: 0; top: 0; bottom: 0; width: 212px; z-index: 1000; }
    }

    @media screen and (max-width: 768px) {
      body.lyra-nav-mobile #app-nav-burger { display: flex; align-items: center; justify-content: center;
        position: fixed; top: calc(env(safe-area-inset-top) + 8px); right: 10px; z-index: 1301;
        width: 40px; height: 40px; border-radius: 10px; border: 1px solid #2a1d12;
        background: rgba(14,14,14,.92); color: #ff7a00; font-size: 1.2rem; cursor: pointer;
        -webkit-tap-highlight-color: transparent; backdrop-filter: blur(4px); }
      body.lyra-nav-mobile #app-nav { display: flex; position: fixed; left: 0; top: 0; bottom: 0;
        width: 240px; max-width: 80vw; transform: translateX(-100%); transition: transform .22s ease;
        z-index: 1310; padding-top: calc(env(safe-area-inset-top) + 14px); overflow-y: auto; }
      body.lyra-nav-mobile #app-nav.open { transform: translateX(0); }
      body.lyra-nav-mobile #app-nav-scrim.show { display: block; position: fixed; inset: 0;
        background: rgba(0,0,0,.5); z-index: 1305; }
      #app-nav .navitem { padding: 12px 11px; font-size: 1rem; }
    }`;

  const style = document.createElement("style");
  style.textContent = css;
  document.head.appendChild(style);

  const nav = document.createElement("nav");
  nav.id = "app-nav";
  nav.setAttribute("aria-label", "App navigation");
  nav.innerHTML =
    '<a class="brand" href="/"><span class="dot"></span> Lyra</a>' +
    ITEMS.map(function (it) {
      return '<a class="navitem' + (isActive(it.href) ? " active" : "") + '" href="' + it.href + '">' +
        '<span class="i">' + it.icon + '</span><span class="l">' + it.label + "</span></a>";
    }).join("") +
    '<div class="spacer"></div>' +
    '<button class="navitem" id="navSettings" type="button"><span class="i">⚙</span><span class="l">Settings</span></button>';
  document.body.insertBefore(nav, document.body.firstChild);

  // Settings opens the chat-page modal; from other pages, jump to chat and open it.
  nav.querySelector("#navSettings").addEventListener("click", function () {
    const btn = document.getElementById("settingsBtn");
    if (btn) btn.click();
    else location.href = "/?settings=1";
  });

  // Mobile drawer — only on pages without their own mobile menu (i.e., not the chat page).
  if (!document.getElementById("hamburgerMenu")) {
    document.body.classList.add("lyra-nav-mobile");
    const burger = document.createElement("button");
    burger.id = "app-nav-burger";
    burger.type = "button";
    burger.setAttribute("aria-label", "Menu");
    burger.textContent = "☰";
    const scrim = document.createElement("div");
    scrim.id = "app-nav-scrim";
    document.body.appendChild(burger);
    document.body.appendChild(scrim);
    const close = function () { nav.classList.remove("open"); scrim.classList.remove("show"); };
    burger.addEventListener("click", function () {
      nav.classList.toggle("open"); scrim.classList.toggle("show");
    });
    scrim.addEventListener("click", close);
    nav.addEventListener("click", function (e) { if (e.target.closest("a")) close(); });
  }
})();