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GraphResearcher
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from pathlib import Path

# Clean BOM
for path in Path("app").rglob("*.py"):
    text = path.read_text(encoding="utf-8-sig")
    text = text.replace("\ufeff", "")
    path.write_text(text, encoding="utf-8")

Path("app/product").mkdir(parents=True, exist_ok=True)
Path("app/product/__init__.py").touch()

Path("app/product/final_product_ui.py").write_text(r'''
def get_home_html() -> str:
    return """
<!DOCTYPE html>
<html>
<head>
    <title>GraphResearcher</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <style>
        * { box-sizing: border-box; }
        body { margin: 0; font-family: Inter, Arial, sans-serif; background: #f8fafc; color: #0f172a; }
        .nav { height: 72px; display: flex; align-items: center; justify-content: space-between; padding: 0 56px; background: white; border-bottom: 1px solid #e5e7eb; }
        .brand { font-weight: 900; font-size: 24px; letter-spacing: -0.7px; }
        .nav a { text-decoration: none; color: #334155; margin-left: 22px; font-weight: 800; }
        .hero { min-height: calc(100vh - 72px); display: grid; grid-template-columns: 1fr 0.9fr; gap: 52px; align-items: center; padding: 64px 72px; }
        .badge { display: inline-block; background: #dbeafe; color: #1d4ed8; padding: 8px 12px; border-radius: 999px; font-weight: 900; font-size: 13px; margin-bottom: 18px; }
        h1 { font-size: 58px; line-height: 1.04; margin: 0 0 20px; letter-spacing: -2px; }
        p { font-size: 19px; line-height: 1.7; color: #475569; max-width: 720px; }
        .actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 32px; }
        .btn { display: inline-block; text-decoration: none; background: #2563eb; color: white; padding: 14px 22px; border-radius: 12px; font-weight: 900; }
        .btn.dark { background: #0f172a; }
        .preview { background: #0f172a; color: white; border-radius: 26px; padding: 24px; box-shadow: 0 28px 70px rgba(15,23,42,0.24); }
        .preview-card { background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.12); border-radius: 18px; padding: 16px; margin-bottom: 14px; line-height: 1.55; }
        .preview-card b { color: #bfdbfe; }
        .features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; padding: 0 72px 58px; }
        .feature { background: white; border: 1px solid #e5e7eb; border-radius: 18px; padding: 24px; }
        .feature p { font-size: 15px; color: #64748b; }
        @media(max-width: 950px) {
            .nav { padding: 0 22px; }
            .hero { grid-template-columns: 1fr; padding: 42px 24px; }
            h1 { font-size: 42px; }
            .features { grid-template-columns: 1fr; padding: 0 24px 44px; }
        }
    </style>
</head>
<body>
    <div class="nav">
        <div class="brand">GraphResearcher</div>
        <div><a href="/app">Launch App</a></div>
    </div>

    <section class="hero">
        <div>
            <div class="badge">Document Chat + GraphRAG</div>
            <h1>Upload documents. Ask questions. Verify every answer.</h1>
            <p>
                GraphResearcher lets users chat with PDFs and reports using citation-grounded retrieval,
                graph context, source verification, graph view, and document comparison.
            </p>
            <div class="actions">
                <a class="btn" href="/app">Start Chatting</a>
                <a class="btn dark" href="/login">Login</a>
            </div>
        </div>

        <div class="preview">
            <div class="preview-card"><b>1. Upload</b><br>Add a document from the app sidebar. No document ID needed.</div>
            <div class="preview-card"><b>2. Chat</b><br>Ask natural questions and get source-backed answers.</div>
            <div class="preview-card"><b>3. Verify</b><br>Open sources, see page/chunk metadata, and inspect the graph.</div>
            <div class="preview-card"><b>4. Compare</b><br>Select a second document and compare them side by side.</div>
        </div>
    </section>

    <section class="features">
        <div class="feature"><h3>Simple workspace</h3><p>Upload, select, delete, and re-index documents from one clean UI.</p></div>
        <div class="feature"><h3>Grounded answers</h3><p>Answers show evidence boxes and source cards for verification.</p></div>
        <div class="feature"><h3>GraphRAG inside</h3><p>Graph view and graph retrieval stay available without exposing developer tools.</p></div>
    </section>
</body>
</html>
"""


def get_product_app_html() -> str:
    return """
<!DOCTYPE html>
<html>
<head>
    <title>GraphResearcher App</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">

    <style>
        * { box-sizing: border-box; }
        body { margin: 0; font-family: Inter, Arial, sans-serif; background: #f8fafc; color: #111827; }
        .app { display: grid; grid-template-columns: 310px 1fr 370px; height: 100vh; }
        .sidebar { background: #0f172a; color: white; padding: 18px; overflow-y: auto; }
        .brand { font-size: 24px; font-weight: 900; margin-bottom: 18px; letter-spacing: -0.7px; }
        .upload-box { border: 1px dashed rgba(255,255,255,0.35); border-radius: 16px; padding: 14px; background: rgba(255,255,255,0.06); margin-bottom: 20px; }
        .upload-box input { width: 100%; font-size: 12px; margin: 10px 0; }
        button { border: none; border-radius: 10px; padding: 10px 13px; cursor: pointer; background: #2563eb; color: white; font-weight: 800; }
        button:hover { background: #1d4ed8; }
        button.secondary { background: #334155; }
        button.green { background: #059669; }
        button.red { background: #dc2626; }
        button.light { background: #f1f5f9; color: #0f172a; border: 1px solid #cbd5e1; }
        .full { width: 100%; margin-bottom: 9px; }
        .small { font-size: 12px; color: #94a3b8; line-height: 1.5; }
        .doc-card { padding: 12px; border-radius: 13px; background: rgba(255,255,255,0.07); margin-bottom: 9px; cursor: pointer; border: 1px solid transparent; }
        .doc-card.active { background: #2563eb; border-color: #93c5fd; }
        .doc-title { font-size: 14px; font-weight: 800; word-break: break-word; }
        .doc-meta { font-size: 11px; color: #cbd5e1; margin-top: 4px; }
        .main { display: flex; flex-direction: column; height: 100vh; }
        .topbar { padding: 14px 20px; border-bottom: 1px solid #e5e7eb; background: white; display: flex; justify-content: space-between; gap: 14px; align-items: center; }
        .selected-doc { font-weight: 900; font-size: 17px; }
        .selected-doc span { display: block; color: #64748b; font-weight: 500; font-size: 12px; margin-top: 2px; }
        .status-pill { font-size: 12px; padding: 7px 10px; border-radius: 999px; background: #e0f2fe; color: #075985; white-space: nowrap; font-weight: 800; }
        .messages { flex: 1; overflow-y: auto; padding: 26px; }
        .message { max-width: 940px; margin-bottom: 18px; display: flex; }
        .message.user { margin-left: auto; justify-content: flex-end; }
        .bubble { padding: 15px 17px; border-radius: 17px; line-height: 1.65; white-space: pre-wrap; font-size: 15.5px; }
        .user .bubble { background: #2563eb; color: white; border-bottom-right-radius: 4px; }
        .assistant .bubble { background: white; border: 1px solid #e5e7eb; color: #111827; border-bottom-left-radius: 4px; box-shadow: 0 1px 3px rgba(0,0,0,0.04); }
        .empty { max-width: 760px; margin: 70px auto; text-align: center; color: #475569; }
        .empty h1 { color: #0f172a; }
        .composer { padding: 16px 20px; background: white; border-top: 1px solid #e5e7eb; }
        .composer-box { display: flex; gap: 10px; align-items: flex-end; }
        textarea { flex: 1; resize: none; min-height: 54px; max-height: 160px; padding: 13px; border: 1px solid #cbd5e1; border-radius: 12px; font-size: 15px; }
        select { width: 100%; padding: 9px; border-radius: 9px; border: 1px solid #cbd5e1; background: white; }
        .right-panel { background: white; border-left: 1px solid #e5e7eb; padding: 16px; overflow-y: auto; }
        .panel-section { margin-bottom: 20px; }
        .panel-section h3 { margin-bottom: 8px; font-size: 16px; }
        .toggle-row { display: flex; flex-direction: column; gap: 8px; font-size: 14px; }
        .metric { display: inline-block; background: #eef2ff; color: #3730a3; padding: 5px 8px; border-radius: 999px; font-size: 12px; margin: 3px; }
        .citation-card { border: 1px solid #e5e7eb; background: #f8fafc; border-radius: 12px; padding: 12px; margin-bottom: 11px; font-size: 13px; }
        .source-line { margin-top: 5px; color: #475569; }
        .preview-text { margin-top: 8px; color: #64748b; font-size: 12px; line-height: 1.5; }
        .answer-card { line-height: 1.72; }
        .answer-card h2 { margin: 0 0 10px; font-size: 18px; color: #0f172a; }
        .answer-card h3 { margin: 18px 0 8px; font-size: 15px; color: #1d4ed8; }
        .answer-card p { margin: 8px 0; }
        .evidence-box { background: #f8fafc; border: 1px solid #e5e7eb; border-radius: 12px; padding: 11px; margin-top: 9px; font-size: 13px; color: #475569; }
        .source-chip { display: inline-block; background: #eef2ff; color: #3730a3; padding: 3px 7px; border-radius: 999px; font-size: 12px; margin: 2px; font-weight: 700; }
        .warning { background: #fff7ed; border: 1px solid #fed7aa; color: #9a3412; padding: 10px; border-radius: 12px; margin: 10px 0; }
        .compare-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 12px; }
        .compare-card { border: 1px solid #e5e7eb; background: #f8fafc; border-radius: 14px; padding: 14px; line-height: 1.6; }
        .danger-zone { border-top: 1px solid #e5e7eb; padding-top: 14px; }
        @media (max-width: 1150px) { .app { grid-template-columns: 290px 1fr; } .right-panel { display: none; } }
        @media (max-width: 850px) { .compare-grid { grid-template-columns: 1fr; } }
        @media (max-width: 760px) { .app { grid-template-columns: 1fr; } .sidebar { display: none; } }
    </style>
</head>

<body>
<div class="app">
    <aside class="sidebar">
        <div class="brand">GraphResearcher</div>

        <div class="upload-box">
            <b>Upload document</b>
            <p class="small">Upload, select, and chat. If Hugging Face rebuilt recently, clear cache and re-upload.</p>
            <input id="fileInput" type="file">
            <button class="full green" onclick="uploadDocument()">Upload & Select</button>
            <button class="full secondary" onclick="refreshDocuments()">Refresh Documents</button>
        </div>

        <div class="small" style="margin-bottom:8px;">My Documents</div>
        <div id="documentList"></div>

        <hr style="border-color:rgba(255,255,255,0.15); margin:18px 0;">

        <button class="full secondary" onclick="newChat()">+ New Chat</button>
        <button class="full secondary" onclick="reindexSelectedDocument()">Re-index Selected</button>
        <button class="full secondary" onclick="buildGraph()">Build / Rebuild Graph</button>
        <button class="full secondary" onclick="openGraphViewer()">View Graph</button>
        <button class="full secondary" onclick="clearWorkspaceCache()">Clear Workspace Cache</button>
        <button class="full secondary" onclick="window.location.href='/'">Home</button>
    </aside>

    <main class="main">
        <div class="topbar">
            <div class="selected-doc" id="selectedDocTitle">
                No document selected
                <span>Upload or select a document from the left sidebar.</span>
            </div>
            <span id="appStatus" class="status-pill">Ready</span>
        </div>

        <div id="messages" class="messages"></div>

        <div class="composer">
            <div class="composer-box">
                <textarea id="messageInput" placeholder="Ask about the selected document..." onkeydown="handleKeyDown(event)"></textarea>
                <button onclick="sendMessage()">Send</button>
            </div>
            <div class="small" style="margin-top:8px;color:#64748b;">
                Tip: choose a second document in the right panel to compare two documents.
            </div>
        </div>
    </main>

    <aside class="right-panel">
        <div class="panel-section">
            <h3>Selected Document</h3>
            <div id="docDetails" class="small" style="color:#64748b;">No document selected.</div>
        </div>

        <div class="panel-section">
            <h3>Compare With</h3>
            <select id="compareDocumentSelect" onchange="renderSelectedDocument()">
                <option value="">No comparison</option>
            </select>
            <p class="small" style="color:#64748b;">Choose another document for side-by-side comparison.</p>
        </div>

        <div class="panel-section">
            <h3>Graph</h3>
            <button class="green" onclick="buildGraph()">Build / Rebuild Graph</button>
            <button class="secondary" onclick="openGraphViewer()">View Graph</button>
        </div>

        <div class="panel-section">
            <h3>Answer Style</h3>
            <select id="answerStyle">
                <option value="detailed" selected>Detailed</option>
                <option value="step_by_step">Step-by-step</option>
                <option value="concise">Concise</option>
                <option value="research">Research style</option>
                <option value="comparison">Comparison focused</option>
            </select>
        </div>

        <div class="panel-section">
            <h3>Advanced Settings</h3>
            <div class="toggle-row">
                <label><input type="checkbox" id="useLLM" checked> Use LLM</label>
                <label><input type="checkbox" id="useReranker" checked> Use reranker</label>
                <label><input type="checkbox" id="useGraph" checked> Use graph context</label>
                <label><input type="checkbox" id="useGraphRetrieval" checked> Use graph retrieval fusion</label>
            </div>
        </div>

        <div class="panel-section">
            <h3>Last Answer Metrics</h3>
            <div id="metricsBox"><span class="metric">No answer yet</span></div>
        </div>

        <div class="panel-section">
            <h3>Sources</h3>
            <div id="citationsBox" class="small" style="color:#64748b;">Sources will appear here after an answer.</div>
        </div>

        <div class="panel-section danger-zone">
            <h3>Danger Zone</h3>
            <button class="red" onclick="deleteSelectedDocument()">Delete Selected Document</button>
        </div>
    </aside>
</div>

<script>
let documents = JSON.parse(localStorage.getItem("graphrag_documents") || "[]");
let selectedDocumentId = localStorage.getItem("graphrag_selected_document_id") || null;
let conversations = JSON.parse(localStorage.getItem("graphrag_final_conversations") || "{}");
let lastSources = [];

function saveDocuments() {
    localStorage.setItem("graphrag_documents", JSON.stringify(documents));
    if (selectedDocumentId) localStorage.setItem("graphrag_selected_document_id", selectedDocumentId);
}
function saveConversations() { localStorage.setItem("graphrag_final_conversations", JSON.stringify(conversations)); }
function setStatus(text) { document.getElementById("appStatus").textContent = text; }
function getSelectedDocument() { return documents.find(d => d.id === selectedDocumentId) || null; }
function getCompareDocument() {
    const id = document.getElementById("compareDocumentSelect")?.value || "";
    if (!id) return null;
    return documents.find(d => d.id === id) || null;
}
function escapeHtml(value) {
    return String(value || "").replaceAll("&","&amp;").replaceAll("<","&lt;").replaceAll(">","&gt;").replaceAll('"',"&quot;");
}
function parseDocumentId(data) {
    return data.document_id || data.id || data.doc_id || data.documentId ||
           data.document?.document_id || data.document?.id ||
           data.file?.document_id || data.result?.document_id || data.data?.document_id;
}
async function tryEndpoints(candidates, optionsFactory) {
    let lastError = null;
    for (const candidate of candidates) {
        try {
            const response = await fetch(candidate, optionsFactory(candidate));
            const contentType = response.headers.get("content-type") || "";
            const data = contentType.includes("application/json") ? await response.json() : await response.text();
            if (response.ok) return { ok: true, endpoint: candidate, data };
            lastError = { endpoint: candidate, status: response.status, data };
        } catch (error) {
            lastError = { endpoint: candidate, error: error.message };
        }
    }
    return { ok: false, error: lastError };
}

function renderDocuments() {
    const list = document.getElementById("documentList");
    list.innerHTML = "";

    if (documents.length === 0) list.innerHTML = `<div class="small">No documents yet. Upload one above.</div>`;

    documents.forEach(doc => {
        const div = document.createElement("div");
        div.className = "doc-card" + (doc.id === selectedDocumentId ? " active" : "");
        div.onclick = () => selectDocument(doc.id);
        div.innerHTML = `<div class="doc-title">${escapeHtml(doc.name || "Untitled document")}</div>
                         <div class="doc-meta">${escapeHtml(doc.status || "uploaded")} • ${escapeHtml(doc.graphStatus || "graph not built")}</div>`;
        list.appendChild(div);
    });

    renderCompareDropdown();
    renderSelectedDocument();
}
function renderCompareDropdown() {
    const select = document.getElementById("compareDocumentSelect");
    if (!select) return;

    const oldValue = select.value;
    select.innerHTML = `<option value="">No comparison</option>`;

    documents.filter(d => d.id !== selectedDocumentId).forEach(doc => {
        const option = document.createElement("option");
        option.value = doc.id;
        option.textContent = doc.name || "Untitled document";
        select.appendChild(option);
    });

    if ([...select.options].some(o => o.value === oldValue)) select.value = oldValue;
}
function renderSelectedDocument() {
    const doc = getSelectedDocument();
    const compareDoc = getCompareDocument();
    const title = document.getElementById("selectedDocTitle");
    const details = document.getElementById("docDetails");

    if (!doc) {
        title.innerHTML = `No document selected <span>Upload or select a document from the left sidebar.</span>`;
        details.textContent = "No document selected.";
        renderMessages();
        return;
    }

    const subtitle = compareDoc ? `Compare mode active with ${compareDoc.name || "second document"}.` : "Ready for document chat.";
    title.innerHTML = `${escapeHtml(doc.name || "Untitled document")} <span>${escapeHtml(subtitle)}</span>`;
    details.innerHTML = `<b>Name:</b> ${escapeHtml(doc.name || "Untitled")}<br>
                         <b>Status:</b> ${escapeHtml(doc.status || "uploaded")}<br>
                         <b>Graph:</b> ${escapeHtml(doc.graphStatus || "not built")}<br>
                         <b>Uploaded:</b> ${escapeHtml(doc.uploadedAt || "unknown")}
                         ${compareDoc ? `<br><br><b>Comparing with:</b> ${escapeHtml(compareDoc.name || "Untitled")}` : ""}`;
    renderMessages();
}
function selectDocument(id) {
    selectedDocumentId = id;
    saveDocuments();
    renderDocuments();
}
function getConversationKey() {
    const compareDoc = getCompareDocument();
    if (compareDoc) return `${selectedDocumentId}__compare__${compareDoc.id}`;
    return selectedDocumentId || "default";
}
function getConversation() {
    const key = getConversationKey();
    if (!conversations[key]) conversations[key] = [];
    return conversations[key];
}
function newChat() {
    if (!selectedDocumentId) return alert("Select a document first.");
    conversations[getConversationKey()] = [];
    saveConversations();
    renderMessages();
}
function renderMessages() {
    const box = document.getElementById("messages");
    const doc = getSelectedDocument();
    const compareDoc = getCompareDocument();

    if (!doc) {
        box.innerHTML = `<div class="empty"><h1>Upload a document to start</h1><p>No document ID needed. Upload a file from the left sidebar, then chat normally.</p></div>`;
        return;
    }

    const convo = getConversation();
    if (convo.length === 0) {
        box.innerHTML = `<div class="empty"><h1>${compareDoc ? "Compare documents" : "Chat with your document"}</h1>
                         <p>${compareDoc ? `You are comparing ${escapeHtml(doc.name)} with ${escapeHtml(compareDoc.name)}.` : `Ask a question about ${escapeHtml(doc.name)}.`}</p></div>`;
        return;
    }

    box.innerHTML = "";
    convo.forEach(msg => {
        const wrapper = document.createElement("div");
        wrapper.className = "message " + msg.role;

        const bubble = document.createElement("div");
        bubble.className = msg.type === "compare" ? "bubble" : "bubble";

        if (msg.role === "assistant" && msg.html) bubble.innerHTML = msg.html;
        else bubble.textContent = msg.content || "";

        wrapper.appendChild(bubble);
        box.appendChild(wrapper);
    });

    box.scrollTop = box.scrollHeight;
}

async function uploadDocument() {
    const file = document.getElementById("fileInput").files[0];
    if (!file) return alert("Choose a file first.");

    setStatus("Uploading...");
    const formData = new FormData();
    formData.append("file", file);

    const result = await tryEndpoints(["/documents/upload", "/upload", "/documents", "/api/documents/upload"], () => ({ method: "POST", body: formData }));
    if (!result.ok) {
        setStatus("Upload failed");
        return alert("Upload failed: " + JSON.stringify(result.error));
    }

    const documentId = parseDocumentId(result.data);
    if (!documentId) {
        setStatus("Upload returned no document ID");
        return alert("Upload worked but document ID was not found in response.");
    }

    const doc = { id: documentId, name: file.name, status: "uploaded", graphStatus: "not built", uploadedAt: new Date().toLocaleString() };
    const index = documents.findIndex(d => d.id === documentId);
    if (index >= 0) documents[index] = doc;
    else documents.unshift(doc);

    selectedDocumentId = documentId;
    saveDocuments();
    renderDocuments();

    setStatus("Uploaded");
    await autoIndexDocument(documentId);
    await buildGraph(true);
}
async function autoIndexDocument(documentId) {
    setStatus("Indexing...");
    const result = await tryEndpoints([`/documents/${documentId}/index`, `/documents/${documentId}/process`, `/documents/${documentId}/ingest`, `/index/${documentId}`], () => ({ method: "POST" }));
    const doc = documents.find(d => d.id === documentId);
    if (doc) {
        doc.status = result.ok ? "indexed" : "uploaded";
        saveDocuments();
        renderDocuments();
    }
    setStatus(result.ok ? "Indexed" : "Uploaded");
}
async function reindexSelectedDocument() {
    const doc = getSelectedDocument();
    if (!doc) return alert("Select a document first.");
    await autoIndexDocument(doc.id);
    await buildGraph(false);
    alert("Re-index attempt complete. Ask again now.");
}
async function buildGraph(silent = false) {
    const doc = getSelectedDocument();
    if (!doc) {
        if (!silent) alert("Select a document first.");
        return;
    }

    setStatus("Building graph...");
    try {
        const response = await fetch(`/documents/${doc.id}/graph/build`, { method: "POST" });
        const data = await response.json();
        if (!response.ok) throw new Error(JSON.stringify(data));

        doc.graphStatus = "graph built";
        doc.graphData = { entities: data.total_entities ?? data.entity_count ?? null, relations: data.total_relations ?? data.relation_count ?? null };
        saveDocuments();
        renderDocuments();

        document.getElementById("metricsBox").innerHTML = `<span class="metric">graph built</span>
            <span class="metric">entities: ${doc.graphData.entities ?? "NA"}</span>
            <span class="metric">relations: ${doc.graphData.relations ?? "NA"}</span>`;

        setStatus("Graph ready");
    } catch (error) {
        doc.graphStatus = "graph not built";
        saveDocuments();
        renderDocuments();
        setStatus("Graph skipped");
        if (!silent) alert("Graph build failed. Re-index or re-upload if needed.");
    }
}
function openGraphViewer() {
    const doc = getSelectedDocument();
    if (!doc) return alert("Select a document first.");
    window.open(`/documents/${doc.id}/graph/view`, "_blank");
}
async function deleteSelectedDocument() {
    const doc = getSelectedDocument();
    if (!doc) return alert("Select a document first.");
    if (!confirm(`Delete "${doc.name}"?`)) return;

    setStatus("Deleting...");
    await tryEndpoints([`/documents/${doc.id}/delete`, `/documents/${doc.id}`, `/api/documents/${doc.id}`], () => ({ method: "DELETE" }));

    documents = documents.filter(d => d.id !== doc.id);
    Object.keys(conversations).forEach(k => { if (k.includes(doc.id)) delete conversations[k]; });
    selectedDocumentId = documents.length ? documents[0].id : null;
    saveDocuments();
    saveConversations();
    renderDocuments();
    renderMessages();
    setStatus("Deleted");
}
function clearWorkspaceCache() {
    if (!confirm("Clear browser document list and chat history? Use this after Hugging Face rebuilds.")) return;
    ["graphrag_documents", "graphrag_selected_document_id", "graphrag_conversations", "graphrag_conversations_v2", "graphrag_conversations_v3", "graphrag_final_conversations"].forEach(k => localStorage.removeItem(k));
    documents = [];
    selectedDocumentId = null;
    conversations = {};
    renderDocuments();
    renderMessages();
    setStatus("Cache cleared");
}
function refreshDocuments() { renderDocuments(); setStatus("Refreshed"); }
function handleKeyDown(event) { if (event.key === "Enter" && !event.shiftKey) { event.preventDefault(); sendMessage(); } }

function buildContextualQuery(currentQuestion) {
    const clean = String(currentQuestion || "").trim();
    if (!clean) return clean;

    const wordCount = clean.split(/\\s+/).filter(Boolean).length;
    if (wordCount <= 8) {
        const prev = getConversation().filter(m => m.role === "user").slice(-2).map(m => m.content).join(" ");
        return prev ? prev + " " + clean : clean;
    }
    return clean;
}
function askPayload(query, documentId) {
    return {
        query,
        document_id: documentId,
        top_k: 8,
        retrieval_mode: "hybrid",
        use_reranker: document.getElementById("useReranker").checked,
        use_llm: document.getElementById("useLLM").checked,
        use_graph: document.getElementById("useGraph").checked,
        graph_entity_limit: 12,
        use_graph_retrieval: document.getElementById("useGraphRetrieval").checked,
        graph_retrieval_top_k: 6
    };
}
async function callAsk(payload) {
    const response = await fetch("/ask", { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify(payload) });
    const data = await response.json();
    if (!response.ok) throw new Error(JSON.stringify(data));
    return data;
}
function valueFrom(obj, keys, fallback = "Not available") {
    for (const key of keys) if (obj && obj[key] !== undefined && obj[key] !== null && obj[key] !== "") return obj[key];
    if (obj && obj.metadata) for (const key of keys) if (obj.metadata[key] !== undefined && obj.metadata[key] !== null && obj.metadata[key] !== "") return obj.metadata[key];
    return fallback;
}
function buildSources(data, doc) {
    const sources = [];
    (data.citations || []).forEach(x => sources.push(x));
    (data.retrieval_fusion?.fused_results || []).forEach(x => sources.push(x));
    (data.sources || data.source_chunks || data.retrieved_sources || []).forEach(x => sources.push(x));

    const cleaned = [];
    const seen = new Set();

    sources.forEach((src, i) => {
        const sid = valueFrom(src, ["source_id", "id", "citation_id"], "S" + (i + 1));
        const chunk = valueFrom(src, ["chunk_id", "source_chunk_id", "chunk"], sid);
        const page = valueFrom(src, ["page_number", "page", "page_no"], "Not available");
        const key = doc.id + "|" + sid + "|" + chunk + "|" + page;
        if (seen.has(key)) return;
        seen.add(key);

        cleaned.push({
            source_id: sid,
            document_id: doc.id,
            document_name: valueFrom(src, ["document_name", "source_file_name", "file_name", "filename", "document_title"], doc.name || "Selected document"),
            page,
            chunk_id: chunk,
            preview: valueFrom(src, ["text_preview", "preview", "chunk_preview", "content_preview", "text", "content"], "Preview not available"),
            raw: src
        });
    });

    return cleaned.slice(0, 8);
}
function updateCitations(groups) {
    const box = document.getElementById("citationsBox");
    lastSources = [];
    box.innerHTML = "";

    groups.forEach(group => {
        const h = document.createElement("div");
        h.innerHTML = `<h4>${escapeHtml(group.label)}</h4>`;
        box.appendChild(h);

        group.sources.forEach(src => {
            const idx = lastSources.length;
            lastSources.push(src);
            const card = document.createElement("div");
            card.className = "citation-card";
            card.innerHTML = `<b>Source ${idx + 1}: ${escapeHtml(src.source_id)}</b>
                <div class="source-line"><b>Document:</b> ${escapeHtml(src.document_name)}</div>
                <div class="source-line"><b>Page:</b> ${escapeHtml(src.page)}</div>
                <div class="source-line"><b>Chunk:</b> ${escapeHtml(src.chunk_id)}</div>
                <div class="preview-text">${escapeHtml(String(src.preview).slice(0, 260))}</div><br>
                <button class="light" onclick="openSource(${idx})">Open source</button>`;
            box.appendChild(card);
        });
    });

    if (!lastSources.length) box.textContent = "No source details returned.";
}
function openSource(index) {
    const src = lastSources[index];
    if (!src) return;
    window.open(`/documents/${src.document_id}/sources/${encodeURIComponent(src.source_id)}/view?page=${encodeURIComponent(src.page || "")}&chunk_id=${encodeURIComponent(src.chunk_id || "")}`, "_blank");
}
function updateMetrics(data, label) {
    const fusion = data.retrieval_fusion || {};
    const graph = data.graph_context || {};
    document.getElementById("metricsBox").innerHTML += `<div style="margin-bottom:8px;"><b>${escapeHtml(label || "")}</b><br>
        <span class="metric">strategy: ${escapeHtml(data.answer_strategy || "NA")}</span>
        <span class="metric">LLM: ${data.used_llm}</span>
        <span class="metric">graph: ${data.graph_used}</span>
        <span class="metric">graph available: ${graph.graph_available}</span>
        <span class="metric">fusion: ${fusion.fusion_used}</span></div>`;
}
function answerLooksWeak(answer) {
    const words = String(answer || "").split(/\\s+/).filter(Boolean);
    return words.length < 100;
}
function renderAnswerHtml(question, data, doc) {
    const answer = String(data.answer || "I could not generate an answer.").trim();
    const sources = buildSources(data, doc);

    let html = `<div class="answer-card">`;

    if (answer.toLowerCase().includes("i could not find relevant indexed sources")) {
        html += `<h2>I could not find indexed evidence</h2>
                 <div class="warning">This usually means the browser remembers an old document but backend files were reset. Clear cache and upload again.</div></div>`;
        return html;
    }

    html += `<h2>Answer</h2>`;

    const escaped = escapeHtml(answer).replaceAll("\\n", "<br>");
    html += `<p>${escaped}</p>`;

    if (sources.length) {
        html += `<h3>Evidence used</h3>`;
        sources.slice(0, 5).forEach((src, i) => {
            html += `<div class="evidence-box"><b>[${escapeHtml(src.source_id)}]</b>
                     <span class="source-chip">Page: ${escapeHtml(src.page)}</span>
                     <span class="source-chip">Chunk: ${escapeHtml(src.chunk_id)}</span>
                     <div style="margin-top:6px;">${escapeHtml(String(src.preview).slice(0, 320))}</div></div>`;
        });
    } else {
        html += `<div class="warning">No source metadata was returned. Re-index or re-upload if this seems wrong.</div>`;
    }

    html += `</div>`;
    return html;
}

async function sendMessage() {
    const doc = getSelectedDocument();
    const compareDoc = getCompareDocument();
    const input = document.getElementById("messageInput");
    const userText = input.value.trim();

    if (!doc) return alert("Upload or select a document first.");
    if (!userText) return;

    const convo = getConversation();
    convo.push({ role: "user", content: userText, createdAt: new Date().toISOString() });
    input.value = "";
    saveConversations();
    renderMessages();

    setStatus(compareDoc ? "Comparing..." : "Thinking...");
    document.getElementById("metricsBox").innerHTML = "";

    try {
        if (compareDoc) {
            let data;
            try {
                const res = await fetch("/documents/compare", {
                    method: "POST",
                    headers: { "Content-Type": "application/json" },
                    body: JSON.stringify({
                        primary_document_id: doc.id,
                        compare_document_id: compareDoc.id,
                        query: userText,
                        retrieval_mode: "hybrid",
                        top_k: 8,
                        use_reranker: true,
                        use_llm: true,
                        use_graph: true,
                        graph_entity_limit: 12,
                        use_graph_retrieval: true,
                        graph_retrieval_top_k: 6
                    })
                });
                data = await res.json();
                if (!res.ok) throw new Error(JSON.stringify(data));
            } catch (err) {
                const dataA = await callAsk(askPayload(buildContextualQuery(userText), doc.id));
                const dataB = await callAsk(askPayload(buildContextualQuery(userText), compareDoc.id));
                data = {
                    document_a: { answer: dataA.answer, ask_response: dataA },
                    document_b: { answer: dataB.answer, ask_response: dataB }
                };
            }

            const dataA = data.document_a?.ask_response || { answer: data.document_a?.answer || "No answer.", citations: data.document_a?.sources || [] };
            const dataB = data.document_b?.ask_response || { answer: data.document_b?.answer || "No answer.", citations: data.document_b?.sources || [] };

            const html = `<div class="answer-card"><h2>Comparison Answer</h2>
                <div class="compare-grid">
                    <div class="compare-card"><h3>${escapeHtml(doc.name || "Document A")}</h3>${renderAnswerHtml(userText, dataA, doc)}</div>
                    <div class="compare-card"><h3>${escapeHtml(compareDoc.name || "Document B")}</h3>${renderAnswerHtml(userText, dataB, compareDoc)}</div>
                </div></div>`;

            convo.push({ role: "assistant", html, content: "Comparison answer", createdAt: new Date().toISOString(), rawCompare: data });
            saveConversations();
            renderMessages();

            updateMetrics(dataA, doc.name || "Document A");
            updateMetrics(dataB, compareDoc.name || "Document B");
            updateCitations([
                { label: doc.name || "Document A", sources: buildSources(dataA, doc) },
                { label: compareDoc.name || "Document B", sources: buildSources(dataB, compareDoc) }
            ]);
            setStatus("Comparison ready");
        } else {
            const data = await callAsk(askPayload(buildContextualQuery(userText), doc.id));
            const html = renderAnswerHtml(userText, data, doc);
            convo.push({ role: "assistant", content: data.answer || "Answer", html, createdAt: new Date().toISOString(), raw: data });
            saveConversations();
            renderMessages();

            updateMetrics(data, doc.name || "Selected document");
            updateCitations([{ label: doc.name || "Selected document", sources: buildSources(data, doc) }]);
            setStatus("Ready");
        }
    } catch (error) {
        convo.push({ role: "assistant", content: "Error: " + error.message, createdAt: new Date().toISOString() });
        saveConversations();
        renderMessages();
        setStatus("Error");
    }
}

renderDocuments();
</script>
</body>
</html>
"""
''', encoding="utf-8")

hf_path = Path("app/deployment/hf_status.py")
text = hf_path.read_text(encoding="utf-8-sig")
text = text.replace("\ufeff", "")

alias_block = """
# =====================================================
# Phase 38 final stable UI export
# This keeps old helper functions but forces / and /app to use the clean final UI.
# =====================================================
from app.product.final_product_ui import get_home_html, get_product_app_html
"""

if "Phase 38 final stable UI export" not in text:
    text += "\\n\\n" + alias_block
    print("Added Phase 38 final UI export alias.")
else:
    print("Phase 38 final UI export already exists.")

hf_path.write_text(text, encoding="utf-8")

print("Phase 38 final UI stabilization complete.")