PDF_RAG_Chatbot/index.html at main · satyamshivam13/PDF_RAG_Chatbot · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <title>Chatbot</title>
  <style>
    body {
      font-family: Arial, sans-serif;
      padding: 20px;
      max-width: 600px;
      margin: auto;
      background-color: #f9f9f9;
    }

    h2 {
      text-align: center;
    }

    #chatbox {
      white-space: pre-wrap;
      border: 1px solid #ccc;
      padding: 10px;
      height: 400px;
      overflow-y: auto;
      background: #fff;
      margin-bottom: 10px;
    }

    #inputContainer {
      display: flex;
      gap: 8px;
      margin-bottom: 10px;
    }

    #webToggleBtn {
      background-color: #e0e0e0;
      color: #333;
    }

    #webToggleBtn.active {
      background-color: #007bff;
      color: white;
    }

    input[type="text"] {
      flex: 1;
      padding: 10px;
      font-size: 16px;
      border: 1px solid #999;
      border-radius: 4px;
    }

    button {
      padding: 10px 16px;
      font-size: 14px;
      border: none;
      border-radius: 4px;
      cursor: pointer;
    }

    #sendBtn {
      background-color: #28a745;
      color: white;
    }

    #sendBtn:hover {
      background-color: #218838;
    }

    #clearBtn {
      background-color: #dc3545;
      color: white;
    }

    #clearBtn:hover {
      background-color: #b52a37;
    }

    .loading {
      font-style: italic;
      color: #999;
    }
  </style>
</head>
<body>
  <h2>Chatbot</h2>
  <div id="chatbox">🤖 Ask me something...</div>

  <div id="inputContainer">
    <button id="webToggleBtn">🌐 Web</button>
    <input type="text" id="queryInput" placeholder="Type your question here" />
    <button id="sendBtn">Send</button>
    <button id="clearBtn">Clear Chat</button>
  </div>

  <script>
    const input = document.getElementById("queryInput");
    const chatbox = document.getElementById("chatbox");
    const sendBtn = document.getElementById("sendBtn");
    const webToggleBtn = document.getElementById("webToggleBtn");
    const clearBtn = document.getElementById("clearBtn");

    let webSearchEnabled = false;

    webToggleBtn.addEventListener("click", () => {
      webSearchEnabled = !webSearchEnabled;
      webToggleBtn.classList.toggle("active");
    });

    clearBtn.addEventListener("click", () => {
      chatbox.innerHTML = "🤖 Ask me something...";
      input.value = "";
      input.focus();
    });

    input.addEventListener("keypress", (e) => {
      if (e.key === "Enter") {
        e.preventDefault();
        sendBtn.click();
      }
    });

    sendBtn.addEventListener("click", async () => {
      const question = input.value.trim();
      if (!question) return;

      appendMessage(`\n\n🧑‍💼 You: ${question}`);
      input.value = "";
      scrollToBottom();

      if (webSearchEnabled) {
        appendMessage(`\n🌐 Web Search enabled. Searching...`);
        scrollToBottom();
        await performWebSearch(question);
      } else {
        appendMessage(`\n🤖 Bot: `);
        const responseEl = document.createElement("span");
        responseEl.classList.add("loading");
        responseEl.textContent = "⏳ Thinking...";
        chatbox.appendChild(responseEl);
        scrollToBottom();
        await askLLM(question, responseEl);
      }
    });

    function appendMessage(text) {
      chatbox.innerHTML += text;
    }

    async function askLLM(question, responseEl) {
      try {
        const start = Date.now();
        const res = await fetch("http://localhost:8000/ask-stream", {
          method: "POST",
          headers: { "Content-Type": "application/json" },
          body: JSON.stringify({ question }),
        });

        if (!res.ok) {
          responseEl.textContent = "⚠️ Server Error.";
          return;
        }

        const reader = res.body.getReader();
        const decoder = new TextDecoder("utf-8");
        let fullText = "";

        while (true) {
          const { done, value } = await reader.read();
          if (done) break;
          const chunk = decoder.decode(value, { stream: true });
          fullText += chunk;
          responseEl.textContent = fullText.trim();
          scrollToBottom();
        }

        const end = ((Date.now() - start) / 1000).toFixed(2);
        appendMessage(`\n⏱️ Response time: ${end} sec`);
      } catch (err) {
        responseEl.textContent = "⚠️ Failed to connect to backend.";
      }
    }

    async function performWebSearch(query) {
      try {
        const res = await fetch("http://localhost:8000/search", {
          method: "POST",
          headers: { "Content-Type": "application/json" },
          body: JSON.stringify({ query }),
        });

        const data = await res.json();
        if (data.results && data.results.length) {
          const links = data.results
            .map((r) => `\n${r.body}\n${r.href}`)
            .join("\n\n");
          appendMessage(`\n\n🌐 Web Results:\n${links}`);
        } else {
          appendMessage("\n❌ No results found.");
        }
      } catch (err) {
        appendMessage("\n⚠️ Web search error.");
      }

      scrollToBottom();
    }

    function scrollToBottom() {
      chatbox.scrollTop = chatbox.scrollHeight;
    }
  </script>
</body>
</html>