// ---- 动态主题色 bootstrap(spec §3):?color= → 派生 → :root 变量 ----
(function () {
    if (typeof ChatTheme === "undefined") return; // theme.js 加载失败→style.css :root 默认橙兜底
    var m = /(?:^|[?&])color=([^&]*)/.exec(location.search);
    function safeDecode(s) { try { return decodeURIComponent(s); } catch (e) { return ""; } }
    var color = m ? safeDecode(m[1]).trim() : "";
    var palette = ChatTheme.derivePalette(color || ChatTheme.DEFAULT_COLOR);
    var root = document.documentElement.style;
    root.setProperty("--w-primary", palette.primary);
    root.setProperty("--w-primary-rgb", palette.primaryRgb);
    root.setProperty("--w-gradient-end", palette.gradientEnd);
    root.setProperty("--w-deep-text", palette.deepText);
    root.setProperty("--w-caption-text", palette.captionText);
    root.setProperty("--w-soft-bg", palette.softBg);
    root.setProperty("--w-border-soft", palette.borderSoft);

    // 头像兜底(与挂件同机制)
    Array.prototype.forEach.call(document.querySelectorAll(".avatar-img"), function (img) {
        function hideEmoji() {
            var s = img.parentElement && img.parentElement.querySelector(".avatar-emoji");
            if (s) s.style.display = "none";
        }
        if (img.complete && img.naturalWidth > 0) { hideEmoji(); return; }
        img.addEventListener("load", hideEmoji);
        img.addEventListener("error", function () { img.remove(); });
    });
})();

(function () {
    // 联系方式配置（与 widget.js 的 data-* 机制一致）
    var chatScript = document.currentScript || document.querySelector('script[src*="chat.js"]');
    var whatsapp = (chatScript && chatScript.getAttribute("data-whatsapp")) || "https://wa.me/+8619037179250";
    var email = (chatScript && chatScript.getAttribute("data-email")) || "mailto:info@borderlesscar.com";
    var waBtn = document.querySelector('.whatsapp-btn');
    var emBtn = document.querySelector('.email-btn');
    if (waBtn) waBtn.href = whatsapp;
    if (emBtn) emBtn.href = email;
    var sessionId = localStorage.getItem("cc_session_id");
    var messagesEl = document.getElementById("messages");
    var inputEl = document.getElementById("input");
    var sendBtn = document.getElementById("sendBtn");
    var typingEl = document.getElementById("typing");
    var endedEl = document.getElementById("chatEnded");
    var popularTopicsEl = document.getElementById("popular-topics");
    var ws = null;
    var ended = false;

    // Current streaming message element
    var streamBubble = null;
    var statusTimer = null;

    function getWsUrl() {
        var loc = window.location;
        var proto = loc.protocol === "https:" ? "wss:" : "ws:";
        return proto + "//" + loc.host + "/ws/chat";
    }

    function connect() {
        ws = new WebSocket(getWsUrl());

        ws.onopen = function () {
            if (sessionId) {
                ws.send(JSON.stringify({ session_id: sessionId }));
            } else {
                ws.send(JSON.stringify({ source: "standalone" }));
            }
        };

        ws.onmessage = function (e) {
            var data = JSON.parse(e.data);

            if (data.type === "init" || data.type === "resumed") {
                sessionId = data.session_id;
                localStorage.setItem("cc_session_id", sessionId);
                if (data.type === "resumed") {
                    loadHistory();
                }
            }

            if (data.type === "stream_start") {
                clearStatusTimer();
                hideTyping();
                streamBubble = addStreamBubble();
            }

            if (data.type === "stream_chunk") {
                if (streamBubble) {
                    streamBubble.textContent += data.content;
                    messagesEl.scrollTop = messagesEl.scrollHeight;
                }
            }

            if (data.type === "stream_end") {
                streamBubble = null;
            }

            if (data.type === "evaluated") {
                if (data.ended) {
                    ended = true;
                    endedEl.classList.add("active");
                    inputEl.disabled = true;
                    sendBtn.disabled = true;
                }
            }

            if (data.type === "error") {
                clearStatusTimer();
                hideTyping();
                streamBubble = null;
                addMessage("assistant", "抱歉，出了点问题，请稍后再试。");
            }
        };

        ws.onclose = function () {
            if (!ended) {
                setTimeout(connect, 3000);
            }
        };

        ws.onerror = function () {
            ws.close();
        };
    }

    function send() {
        var text = inputEl.value.trim();
        if (!text || ended || !ws || ws.readyState !== WebSocket.OPEN) return;

        addMessage("user", text);
        inputEl.value = "";
        hidePopularTopics();

        // Immediate feedback: show status then typing
        showStatusThenTyping();

        ws.send(JSON.stringify({ content: text }));
    }

    function sendTopicMessage(topic) {
        if (ended || !ws || ws.readyState !== WebSocket.OPEN) return;

        addMessage("user", topic);
        hidePopularTopics();

        // Immediate feedback: show status then typing
        showStatusThenTyping();

        ws.send(JSON.stringify({ content: topic }));
    }

    function hidePopularTopics() {
        if (popularTopicsEl) {
            popularTopicsEl.style.display = "none";
        }
    }

    function showStatusThenTyping() {
        clearStatusTimer();
        showTyping();
        // Auto-hide typing is handled by stream_start replacing it
    }

    function clearStatusTimer() {
        if (statusTimer) {
            clearTimeout(statusTimer);
            statusTimer = null;
        }
    }

    function addMessage(role, content) {
        var div = document.createElement("div");
        div.className = "message " + role;

        var wrapper = document.createElement("div");
        var bubble = document.createElement("div");
        bubble.className = "bubble";
        bubble.textContent = content;

        wrapper.appendChild(bubble);
        div.appendChild(wrapper);
        messagesEl.appendChild(div);
        messagesEl.scrollTop = messagesEl.scrollHeight;
    }

    function addStreamBubble() {
        var div = document.createElement("div");
        div.className = "message assistant";

        var wrapper = document.createElement("div");
        var bubble = document.createElement("div");
        bubble.className = "bubble";
        bubble.textContent = "";

        wrapper.appendChild(bubble);
        div.appendChild(wrapper);
        messagesEl.appendChild(div);
        messagesEl.scrollTop = messagesEl.scrollHeight;
        return bubble;
    }

    function showTyping() {
        typingEl.classList.add("active");
        messagesEl.scrollTop = messagesEl.scrollHeight;
    }

    function hideTyping() {
        typingEl.classList.remove("active");
    }

    function loadHistory() {
    }

    sendBtn.addEventListener("click", send);
    inputEl.addEventListener("keydown", function (e) {
        if (e.key === "Enter" && !e.shiftKey) {
            e.preventDefault();
            send();
        }
    });

    // Popular topics buttons
    var topicBtns = document.querySelectorAll(".popular-topic-btn");
    topicBtns.forEach(function (btn) {
        btn.addEventListener("click", function () {
            var topic = this.getAttribute("data-topic");
            sendTopicMessage(topic);
        });
    });

    connect();
})();