/* Auteur : Simon-Pierre Boucher — contact@spboucher.ai
 * ka-ui/agent/ka-agent.js — KA AGENT : widget de chat commun de l'écosystème
 * Groupe KA. Vanilla JS, zéro dépendance, injecté sur les 13 sites.
 *   <script>window.KA_AGENT={site:"lou-ka"}</script>
 *   <script src="/ka-agent.js" defer></script>
 * Bulle flottante en bas à droite → panneau de chat (bulle) → plein écran (⛶).
 * Flux SSE en direct depuis le backend central (texte token par token +
 * indicateur d'outil). Historique conservé en localStorage (par site).
 */
(function () {
  "use strict";
  var CFG = window.KA_AGENT || {};
  var SITE = CFG.site || "groupe-ka";
  var ENDPOINT = CFG.endpoint || "https://www.api-ka.com/api/agent/chat";
  var KEY = "ka-agent-" + SITE;
  var MAXLOG = 20;

  /* ---------- styles ---------- */
  var css = `
  .kaa-btn{position:fixed;right:18px;bottom:18px;z-index:2147483000;width:58px;height:58px;
    border-radius:50%;border:2px solid var(--ink,#141814);background:var(--accent,#d9f26b);
    color:var(--on-accent,#141814);font:700 17px/1 "Space Grotesk",system-ui,sans-serif;
    cursor:pointer;box-shadow:4px 4px 0 rgba(20,24,20,.85);display:flex;align-items:center;
    justify-content:center;transition:transform .15s;padding-bottom:env(safe-area-inset-bottom,0)}
  .kaa-btn:hover{transform:translate(-2px,-2px)}
  .kaa-panel{position:fixed;right:16px;bottom:86px;z-index:2147483001;width:min(392px,calc(100vw - 24px));
    height:min(580px,calc(100dvh - 110px));display:none;flex-direction:column;background:var(--paper,#f5f3ee);
    border:2px solid var(--ink,#141814);border-radius:14px;box-shadow:8px 8px 0 rgba(20,24,20,.85);
    overflow:hidden;font-family:Inter,system-ui,sans-serif}
  .kaa-panel.kaa-open{display:flex}
  .kaa-panel.kaa-full{right:0;bottom:0;width:100vw;height:100dvh;border-radius:0;border:0;box-shadow:none}
  .kaa-head{display:flex;align-items:center;gap:9px;padding:11px 14px;background:var(--ink,#141814);
    color:var(--paper,#f5f3ee);flex:none}
  .kaa-head b{font:700 15px "Space Grotesk",system-ui,sans-serif;letter-spacing:-.02em}
  .kaa-head .kaa-ka{display:inline-block;background:var(--accent,#d9f26b);color:var(--on-accent,#141814);
    border-radius:6px;padding:1px 7px 2px;transform:rotate(-2deg);font-weight:700}
  .kaa-head small{font:700 9.5px "JetBrains Mono",monospace;letter-spacing:.09em;text-transform:uppercase;opacity:.65}
  .kaa-head .kaa-sp{flex:1}
  .kaa-hbtn{width:34px;height:34px;border:1.5px solid rgba(245,243,238,.4);border-radius:8px;background:none;
    color:var(--paper,#f5f3ee);font-size:15px;cursor:pointer;line-height:1}
  .kaa-hbtn:hover{border-color:var(--accent,#d9f26b);color:var(--accent,#d9f26b)}
  .kaa-log{flex:1;overflow-y:auto;padding:14px;display:flex;flex-direction:column;gap:10px;
    overscroll-behavior:contain;-webkit-overflow-scrolling:touch}
  .kaa-msg{max-width:86%;padding:9px 13px;border:1.5px solid var(--ink,#141814);border-radius:12px;
    font-size:13.5px;line-height:1.5;white-space:pre-wrap;word-break:break-word}
  .kaa-msg.kaa-u{align-self:flex-end;background:var(--accent,#d9f26b);color:var(--on-accent,#141814);
    border-bottom-right-radius:4px}
  .kaa-msg.kaa-a{align-self:flex-start;background:#fff;border-bottom-left-radius:4px;box-shadow:3px 3px 0 rgba(20,24,20,.12)}
  .kaa-msg.kaa-a a{color:inherit;text-decoration:underline;text-underline-offset:3px}
  .kaa-msg.kaa-a b{font-weight:700}
  .kaa-tool{align-self:flex-start;font:700 10px "JetBrains Mono",monospace;letter-spacing:.07em;
    text-transform:uppercase;color:var(--ink-2,#4d5551);padding:3px 10px;border:1.5px dashed var(--ink-2,#4d5551);
    border-radius:999px;background:var(--surface-2,#faf9f5)}
  .kaa-in{display:flex;gap:8px;padding:11px;border-top:2px solid var(--ink,#141814);background:#fff;flex:none;
    padding-bottom:calc(11px + env(safe-area-inset-bottom,0))}
  .kaa-in textarea{flex:1;resize:none;min-height:44px;max-height:110px;padding:11px 12px;font:13.5px/1.4 Inter,system-ui,sans-serif;
    border:1.5px solid var(--ink,#141814);border-radius:9px;background:var(--paper,#f5f3ee);outline:none}
  .kaa-in button{min-width:52px;min-height:44px;border:1.5px solid var(--ink,#141814);border-radius:9px;
    background:var(--ink,#141814);color:var(--accent,#d9f26b);font:700 16px "Space Grotesk",system-ui;cursor:pointer}
  .kaa-in button:disabled{opacity:.45}
  .kaa-hello{font-size:12.5px;color:var(--ink-2,#4d5551);padding:4px 2px}
  .kaa-dots::after{content:"…";animation:kaa-b 1.2s infinite}
  @keyframes kaa-b{0%{opacity:.2}50%{opacity:1}100%{opacity:.2}}
  @media (max-width:560px){.kaa-panel{right:8px;left:8px;width:auto}}
  `;

  /* ---------- markdown minimal (gras, liens, puces) — texte échappé d'abord ---------- */
  function esc(s) {
    return s.replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;");
  }
  function md(s) {
    return esc(s)
      .replace(/\*\*([^*]+)\*\*/g, "<b>$1</b>")
      .replace(/(https?:\/\/[^\s<)"']+)/g, function (u) {
        return '<a href="' + u + '" target="_blank" rel="noopener noreferrer">' + u.replace(/^https?:\/\/(www\.)?/, "").slice(0, 40) + "</a>";
      });
  }

  /* ---------- état ---------- */
  var log = [];
  try { log = JSON.parse(localStorage.getItem(KEY) || "[]"); } catch (e) {}
  function save() { try { localStorage.setItem(KEY, JSON.stringify(log.slice(-MAXLOG))); } catch (e) {} }

  /* ---------- DOM ---------- */
  var style = document.createElement("style");
  style.textContent = css;
  document.head.appendChild(style);

  var btn = document.createElement("button");
  btn.className = "kaa-btn";
  btn.setAttribute("aria-label", "Ouvrir KA Agent — assistant de l'écosystème Groupe KA");
  btn.innerHTML = "Ka";

  var panel = document.createElement("div");
  panel.className = "kaa-panel";
  panel.setAttribute("role", "dialog");
  panel.setAttribute("aria-label", "KA Agent");
  panel.innerHTML =
    '<div class="kaa-head"><b>KA<span class="kaa-ka">Agent</span></b><small>Groupe KA · IA</small><span class="kaa-sp"></span>' +
    '<button class="kaa-hbtn kaa-x1" title="Plein écran" aria-label="Plein écran">⛶</button>' +
    '<button class="kaa-hbtn kaa-x2" title="Fermer" aria-label="Fermer">✕</button></div>' +
    '<div class="kaa-log"></div>' +
    '<div class="kaa-in"><textarea rows="1" placeholder="Posez votre question…" aria-label="Votre question"></textarea>' +
    "<button aria-label=\"Envoyer\">➤</button></div>";
  document.body.appendChild(btn);
  document.body.appendChild(panel);

  var logEl = panel.querySelector(".kaa-log");
  var ta = panel.querySelector("textarea");
  var send = panel.querySelector(".kaa-in button");

  function scroll() { logEl.scrollTop = logEl.scrollHeight; }
  function bubble(cls, html) {
    var d = document.createElement("div");
    d.className = "kaa-msg " + cls;
    d.innerHTML = html;
    logEl.appendChild(d);
    scroll();
    return d;
  }
  function toolChip(name) {
    var d = document.createElement("div");
    d.className = "kaa-tool kaa-dots";
    d.textContent = "🔎 " + name.replace(/_/g, " ");
    logEl.appendChild(d);
    scroll();
    return d;
  }

  function hello() {
    if (log.length) return;
    var d = document.createElement("div");
    d.className = "kaa-hello";
    d.textContent = "👋 Je suis KA Agent, l'assistant de l'écosystème Groupe KA. Posez-moi une question sur ce site, ses données (prix, annonces, stats…) ou sur le groupe.";
    logEl.appendChild(d);
  }
  function render() {
    logEl.innerHTML = "";
    hello();
    log.forEach(function (m) { bubble(m.role === "user" ? "kaa-u" : "kaa-a", md(m.content)); });
    scroll();
  }

  /* ---------- ouverture / plein écran ---------- */
  btn.addEventListener("click", function () {
    panel.classList.toggle("kaa-open");
    if (panel.classList.contains("kaa-open")) { render(); ta.focus(); }
  });
  panel.querySelector(".kaa-x2").addEventListener("click", function () {
    panel.classList.remove("kaa-open", "kaa-full");
  });
  panel.querySelector(".kaa-x1").addEventListener("click", function () {
    panel.classList.toggle("kaa-full");
    scroll();
  });

  /* ---------- envoi + flux SSE ---------- */
  var busy = false;
  function ask() {
    var q = ta.value.trim();
    if (!q || busy) return;
    busy = true;
    send.disabled = true;
    ta.value = "";
    log.push({ role: "user", content: q });
    save();
    bubble("kaa-u", md(q));
    var out = bubble("kaa-a", '<span class="kaa-dots"></span>');
    var acc = "";
    var chips = [];

    fetch(ENDPOINT, {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ site: SITE, messages: log.slice(-MAXLOG) }),
    })
      .then(function (res) {
        if (!res.ok || !res.body) throw new Error("HTTP " + res.status);
        var reader = res.body.getReader();
        var dec = new TextDecoder();
        var buf = "";
        function pump() {
          return reader.read().then(function (r) {
            if (r.done) return finish();
            buf += dec.decode(r.value, { stream: true });
            var blocks = buf.split("\n\n");
            buf = blocks.pop();
            blocks.forEach(function (b) {
              var ev = (b.match(/^event: (.+)$/m) || [])[1];
              var dm = (b.match(/^data: (.+)$/m) || [])[1];
              if (!ev || !dm) return;
              var data = {};
              try { data = JSON.parse(dm); } catch (e) {}
              if (ev === "delta" && data.text) {
                acc += data.text;
                out.innerHTML = md(acc);
                scroll();
              } else if (ev === "tool") {
                chips.push(toolChip(data.name || "recherche"));
                logEl.appendChild(out); // la bulle reste après le chip
                scroll();
              } else if (ev === "error") {
                acc = acc || "Désolé, une erreur est survenue (" + (data.message || "inconnue") + "). Réessayez.";
                out.innerHTML = md(acc);
              }
            });
            return pump();
          });
        }
        return pump();
      })
      .catch(function (e) {
        acc = acc || "Impossible de joindre KA Agent (" + e.message + "). Réessayez dans un instant.";
        out.innerHTML = md(acc);
      })
      .then(function () { finish(); });

    function finish() {
      if (busy === false) return;
      busy = false;
      send.disabled = false;
      chips.forEach(function (c) { c.classList.remove("kaa-dots"); });
      if (!acc) { acc = "Je n'ai pas pu formuler de réponse — réessayez."; out.innerHTML = md(acc); }
      log.push({ role: "assistant", content: acc });
      save();
      scroll();
    }
  }
  send.addEventListener("click", ask);
  ta.addEventListener("keydown", function (e) {
    if (e.key === "Enter" && !e.shiftKey) { e.preventDefault(); ask(); }
  });
})();