{% extends 'base.html' %}
{% load i18n static %}
{% block title %}Haikal Bot{% endblock %}
{% block content %}
    <script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/PapaParse/5.3.2/papaparse.min.js"></script>
    <div class="container mt-5">
        <div class="card shadow-sm">
            <div class="card-header d-flex justify-content-between align-items-center">
                <h5 class="mb-0">
                    <i class="fas fa-robot me-2"></i>{% trans "HaikalBot" %}
                </h5>
                <div>
                    <button id="export-btn"
                            class="btn btn-sm btn-phoenix-secondary"
                            style="display:none">{% trans "Export CSV" %}</button>
                </div>
            </div>
            <div class="card-body"
                 style="max-height: 60vh;
                        overflow-y: auto"
                 id="chat-history"></div>
            <div class="card-footer bg-white border-top">
                <form id="chat-form" class="d-flex align-items-center gap-2">
                    <button type="button" class="btn btn-light" id="mic-btn">
                        <i class="fas fa-microphone"></i>
                    </button>
                    <input type="text"
                           class="form-control"
                           id="chat-input"
                           placeholder="{% trans 'Type your question...' %}"
                           required />
                    <button type="submit" class="btn btn-phoenix-primary">
                        <i class="fas fa-paper-plane"></i>
                    </button>
                </form>
            </div>
            <div id="chart-container" style="display:none;" class="p-4 border-top">
                <canvas id="chart-canvas" height="200px"></canvas>
            </div>
        </div>
    </div>
    <script>
    const chatHistory = document.getElementById('chat-history');
    const chartContainer = document.getElementById('chart-container');
    const chartCanvas = document.getElementById('chart-canvas');
    const exportBtn = document.getElementById('export-btn');
    let chartInstance = null;
    let latestDataTable = null;

    function getCookie(name) {
      let cookieValue = null;
      if (document.cookie && document.cookie !== "") {
        const cookies = document.cookie.split(";");
        for (let cookie of cookies) {
          cookie = cookie.trim();
          if (cookie.substring(0, name.length + 1) === name + "=") {
            cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
            break;
          }
        }
      }
      return cookieValue;
    }

    function speak(text) {
      const utterance = new SpeechSynthesisUtterance(text);
      utterance.lang = document.documentElement.lang || "en";
      window.speechSynthesis.speak(utterance);
    }

    function renderTable(data) {
      latestDataTable = data;
      exportBtn.style.display = 'inline-block';
      const headers = Object.keys(data[0]);
      let html = '<div class="table-responsive"><table class="table table-bordered table-striped"><thead><tr>';
      headers.forEach(h => html += `<th>${h}</th>`);
      html += '</tr></thead><tbody>';
      data.forEach(row => {
        html += '<tr>' + headers.map(h => `<td>${row[h]}</td>`).join('') + '</tr>';
      });
      html += '</tbody></table></div>';
      return html;
    }

    function appendMessage(role, htmlContent) {
      const align = role === 'AI' ? 'bg-secondary-light' : 'bg-primary-light';
      chatHistory.innerHTML += `
    <div class="mb-3 p-3 rounded ${align}">
      <strong>${role}:</strong><br>${htmlContent}
    </div>
  `;
      chatHistory.scrollTop = chatHistory.scrollHeight;
    }

    document.getElementById('chat-form').addEventListener('submit', async function(e) {
      e.preventDefault();
      const input = document.getElementById('chat-input');
      const prompt = input.value.trim();
      const csrfToken = getCookie("csrftoken");

      if (!prompt) return;

      appendMessage('You', prompt);
      input.value = "";
      chartContainer.style.display = 'none';
      exportBtn.style.display = 'none';
      if (chartInstance) {
        chartInstance.destroy();
        chartInstance = null;
      }

      const response = await fetch("{% url 'haikalbot' %}", {
        method: "POST",
        headers: {
          "Content-Type": "application/x-www-form-urlencoded",
          "X-CSRFToken": csrfToken
        },
        body: new URLSearchParams({ prompt })
      });

      const result = await response.json();

  // Show chart if available
      if (result.chart && result.chart.type && result.chart.labels && result.chart.data) {
        chartInstance = new Chart(chartCanvas, {
          type: result.chart.type,
          data: {
            labels: result.chart.labels,
            datasets: [{
              label: result.chart.labels.join(", "),
              data: result.chart.data,
              backgroundColor: result.chart.backgroundColor || []
            }]
          },
          options: {
            responsive: true,
            plugins: {
              title: {
                display: true,
                text: result.chart.type.toUpperCase()
              }
            }
          }
        });
        chartContainer.style.display = 'block';
        appendMessage('AI', `{% trans "Chart displayed below." %}`);

        return;
      }

  // Table if list of objects
      if (Array.isArray(result.data) && result.data.length && typeof result.data[0] === 'object') {
        const tableHTML = renderTable(result.data);
        appendMessage('AI', tableHTML);

      } else {
        const content = typeof result.data === 'object'
          ? `<pre>${JSON.stringify(result.data, null, 2)}</pre>`
          : `<p>${result.data}</p>`;
        appendMessage('AI', content);
      }
    });

    document.getElementById('export-btn').addEventListener('click', () => {
      if (!latestDataTable) return;
      const csv = Papa.unparse(latestDataTable);
      const blob = new Blob([csv], { type: 'text/csv;charset=utf-8;' });
      const url = URL.createObjectURL(blob);
      const a = document.createElement('a');
      a.href = url;
      a.download = 'haikal_data.csv';
      document.body.appendChild(a);
      a.click();
      document.body.removeChild(a);
    });

// Voice input (speech-to-text)
    document.getElementById('mic-btn').addEventListener('click', () => {
      const recognition = new (window.SpeechRecognition || window.webkitSpeechRecognition)();
      recognition.lang = document.documentElement.lang || "en";
      recognition.interimResults = false;
      recognition.maxAlternatives = 1;

      recognition.onresult = (event) => {
        const speech = event.results[0][0].transcript;
        document.getElementById('chat-input').value = speech;
      };

      recognition.onerror = (e) => {
        console.error('Speech recognition error', e);
      };

      recognition.start();
    });
    </script>
{% endblock %}