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<!DOCTYPE html>
<html lang="fr">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Mariam M-0 | Solution Mathématique</title>
  <!-- Tailwind CSS -->
  <link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/tailwind.min.css" rel="stylesheet">
  
  <!-- SweetAlert2 -->
  <script src="https://cdn.jsdelivr.net/npm/sweetalert2@11"></script>

  <!-- Configuration de MathJax -->
  <script>
    window.MathJax = {
      tex: {
        inlineMath: [['$', '$']],
        displayMath: [['$$', '$$']],
        processEscapes: true,
        packages: {'[+]': ['autoload', 'ams']}
      },
      options: {
        enableMenu: false,
        messageStyle: 'none'
      },
      startup: {
        pageReady: () => { window.mathJaxReady = true; }
      }
    };
  </script>
  <script src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js" id="MathJax-script" async></script>
  <script src="https://cdn.jsdelivr.net/npm/[email protected]/lib/marked.umd.min.js"></script>

  <style>
    @import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;700&display=swap');
    body { font-family: 'Space Grotesk', sans-serif; }
    
    .uploadArea {
      background: #f3f4f6;
      border: 2px dashed #d1d5db;
      transition: border-color 0.2s ease;
    }
    .uploadArea:hover { border-color: #3b82f6; }
    
    .blue-button { background: #3b82f6; transition: background-color 0.2s ease; }
    .blue-button:hover { background: #2563eb; }
    
    .loader {
      width: 48px;
      height: 48px;
      border: 3px solid #3b82f6;
      border-bottom-color: transparent;
      border-radius: 50%;
      display: inline-block;
      animation: rotation 1s linear infinite;
    }
    @keyframes rotation { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }
    
    .thought-box {
      transition: max-height 0.3s ease-out;
      max-height: 0;
      overflow: hidden;
    }
    .thought-box.open { max-height: 500px; }
    
    #thoughtsContent, #answerContent {
      max-height: 500px;
      overflow-y: auto;
      scroll-behavior: smooth;
      white-space: pre-wrap;
    }
    
    .preview-image { max-width: 300px; max-height: 300px; object-fit: contain; }
    
    .timestamp { color: #3b82f6; font-size: 0.9em; margin-left: 8px; }
    
    table {
      border-collapse: collapse;
      width: 100%;
      margin-bottom: 1rem;
    }
    th, td {
      border: 1px solid #d1d5db;
      padding: 0.5rem;
      text-align: left;
    }
    th { background-color: #f3f4f6; font-weight: 600; }
    .table-responsive { overflow-x: auto; }
    
    /* Style pour le bouton Sauvegarder afin de le mettre en évidence */
    #saveButton {
      background: #3b82f6;
      color: white;
      padding: 0.5rem 1rem;
      border-radius: 0.375rem;
      transition: background-color 0.2s ease;
    }
    #saveButton:hover { background: #2563eb; }
    
    /* Modal plein écran pour les sauvegardes */
    #savedModal {
      display: none;
      position: fixed;
      inset: 0;
      background: rgba(0,0,0,0.5);
      z-index: 50;
    }
    #savedModal.active { display: block; }
    #savedModalContent {
      background: #fff;
      width: 100%;
      height: 100%;
      overflow-y: auto;
    }
  </style>
</head>
<body class="p-4">
  <div class="max-w-4xl mx-auto">
    <header class="p-6 text-center mb-8">
      <h1 class="text-4xl font-bold text-blue-600">Mariam M-1</h1>
      <p class="text-gray-600">Solution Mathématique/Physique/Chimie Intelligente</p>
      <div class="mt-4 flex justify-end">
        <button id="openSaved" class="blue-button px-4 py-2 text-white rounded">Sauvegardes</button>
      </div>
    </header>

    <main id="mainContent">
      <form id="problemForm" class="space-y-6" novalidate>
        <!-- Zone de dépôt / sélection d'image -->
        <div class="uploadArea p-8 text-center relative" aria-label="Zone de dépôt d'image">
          <input type="file" id="imageInput" accept="image/*" class="absolute inset-0 w-full h-full opacity-0 cursor-pointer" aria-label="Choisir une image">
          <div class="space-y-3">
            <div class="w-16 h-16 mx-auto border-2 border-blue-400 rounded-full flex items-center justify-center">
              <svg class="w-8 h-8 text-blue-400" fill="none" stroke="currentColor" viewBox="0 0 24 24" aria-hidden="true">
                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2"
                  d="M4 16l4.586-4.586a2 2 0 012.828 0L16 16m-2-2l1.586-1.586a2 2 0 012.828 0L20 14m-6-6h.01M6 20h12a2 2 0 002-2V6a2 2 0 00-2-2H6a2 2 0 00-2 2v12a2 2 0 002 2z" />
              </svg>
            </div>
            <p class="text-gray-700 font-medium">Déposez votre image ici</p>
            <p class="text-gray-500 text-sm">ou cliquez pour sélectionner</p>
          </div>
        </div>
        <!-- Aperçu de l'image -->
        <div id="imagePreview" class="hidden text-center">
          <img id="previewImage" class="preview-image mx-auto" alt="Prévisualisation de l'image">
        </div>
        <button type="submit" class="blue-button w-full py-3 text-white font-medium rounded-lg">
          Résoudre le problème
        </button>
      </form>

      <!-- Loader -->
      <div id="loader" class="hidden mt-8 text-center">
        <span class="loader"></span>
        <p class="mt-4 text-gray-600">Analyse en cours...</p>
      </div>

      <!-- Zone d'affichage de la solution -->
      <section id="solution" class="hidden mt-8 space-y-6 relative">
        <div class="border-t pt-4">
          <button id="thoughtsToggle" type="button" class="w-full flex justify-between items-center p-2">
            <span class="font-medium text-gray-700">Processus de Réflexion</span>
            <span id="timestamp" class="timestamp"></span>
          </button>
          <div id="thoughtsBox" class="thought-box">
            <div id="thoughtsContent" class="p-4 text-gray-600"></div>
          </div>
        </div>
        <div class="border-t pt-6">
          <div class="flex justify-between items-center">
            <h3 class="text-xl font-bold text-gray-800 mb-4">Solution</h3>
            <!-- Bouton Sauvegarder mis en évidence -->
            <button id="saveButton">Sauvegarder</button>
          </div>
          <div id="answerContent" class="text-gray-700 table-responsive"></div>
        </div>
      </section>
    </main>
  </div>

  <!-- Modal plein écran pour les sauvegardes -->
  <div id="savedModal">
    <div id="savedModalContent" class="p-6">
      <header class="flex justify-between items-center border-b pb-4">
        <h2 class="text-2xl font-bold">Sauvegardes</h2>
        <button id="closeSaved" class="text-3xl text-gray-600">&times;</button>
      </header>
      <div id="savedListContainer" class="mt-4">
        <ul id="savedList" class="space-y-4">
          <!-- Liste des sauvegardes insérée dynamiquement -->
        </ul>
      </div>
      <div class="mt-6">
        <button id="newExercise" class="blue-button w-full py-3 text-white font-medium rounded-lg">
          Résoudre un nouvel exercice
        </button>
      </div>
    </div>
  </div>

  <script>
    document.addEventListener('DOMContentLoaded', () => {
      // Récupération des éléments
      const form = document.getElementById('problemForm');
      const imageInput = document.getElementById('imageInput');
      const loader = document.getElementById('loader');
      const solutionSection = document.getElementById('solution');
      const thoughtsContent = document.getElementById('thoughtsContent');
      const answerContent = document.getElementById('answerContent');
      const thoughtsToggle = document.getElementById('thoughtsToggle');
      const thoughtsBox = document.getElementById('thoughtsBox');
      const imagePreview = document.getElementById('imagePreview');
      const previewImage = document.getElementById('previewImage');
      const timestamp = document.getElementById('timestamp');
      const saveButton = document.getElementById('saveButton');
      const openSaved = document.getElementById('openSaved');
      const closeSaved = document.getElementById('closeSaved');
      const savedModal = document.getElementById('savedModal');
      const savedList = document.getElementById('savedList');
      const newExercise = document.getElementById('newExercise');
      const mainContent = document.getElementById('mainContent');

      let startTime = null;
      let timerInterval = null;
      let thoughtsBuffer = '';
      let answerBuffer = '';
      let currentMode = null;
      let updateTimeout = null;

      // Mise à jour du temps écoulé
      const updateTimestamp = () => {
        if (startTime) {
          const seconds = Math.floor((Date.now() - startTime) / 1000);
          timestamp.textContent = `${seconds}s`;
        }
      };
      const startTimer = () => { startTime = Date.now(); timerInterval = setInterval(updateTimestamp, 1000); updateTimestamp(); };
      const stopTimer = () => { clearInterval(timerInterval); startTime = null; timestamp.textContent = ''; };

      // Affichage de l'image sélectionnée
      const handleFileSelect = file => {
        if (!file) return;
        const reader = new FileReader();
        reader.onload = e => {
          previewImage.src = e.target.result;
          imagePreview.classList.remove('hidden');
        };
        reader.readAsDataURL(file);
      };

      thoughtsToggle.addEventListener('click', () => { thoughtsBox.classList.toggle('open'); });
      imageInput.addEventListener('change', e => handleFileSelect(e.target.files[0]));

      // Gestion du glisser-déposer
      const dropZone = document.querySelector('.uploadArea');
      dropZone.addEventListener('dragover', e => { e.preventDefault(); dropZone.classList.add('border-blue-400'); });
      dropZone.addEventListener('dragleave', e => { e.preventDefault(); dropZone.classList.remove('border-blue-400'); });
      dropZone.addEventListener('drop', e => { e.preventDefault(); dropZone.classList.remove('border-blue-400'); handleFileSelect(e.dataTransfer.files[0]); });

      // Rendu MathJax et mise à jour de l'affichage
      const typesetAnswerIfReady = async () => {
        if (window.mathJaxReady) {
          MathJax.startup.document.elements = [document.getElementById('answerContent')];
          await MathJax.typesetPromise();
          answerContent.scrollTop = answerContent.scrollHeight;
        } else { setTimeout(typesetAnswerIfReady, 200); }
      };
      const updateDisplay = async () => {
        thoughtsContent.innerHTML = marked.parse(thoughtsBuffer);
        answerContent.innerHTML = marked.parse(answerBuffer);
        await typesetAnswerIfReady();
        updateTimeout = null;
      };
      const scheduleUpdate = () => { if (!updateTimeout) updateTimeout = setTimeout(updateDisplay, 200); };

      marked.setOptions({ gfm: true, breaks: true });

      // Envoi de l'image pour résolution
      form.addEventListener('submit', async e => {
        e.preventDefault();
        const file = imageInput.files[0];
        if (!file) { alert('Veuillez sélectionner une image.'); return; }
        startTimer();
        loader.classList.remove('hidden');
        solutionSection.classList.add('hidden');
        thoughtsContent.innerHTML = '';
        answerContent.innerHTML = '';
        thoughtsBuffer = '';
        answerBuffer = '';
        currentMode = null;
        thoughtsBox.classList.add('open');

        const formData = new FormData();
        formData.append('image', file);
        try {
          const response = await fetch('/solve', { method: 'POST', body: formData });
          const reader = response.body.getReader();
          const decoder = new TextDecoder();
          let buffer = '';
          const processChunk = async chunk => {
            buffer += decoder.decode(chunk, { stream: true });
            const lines = buffer.split('\n\n');
            buffer = lines.pop();
            for (const line of lines) {
              if (!line.startsWith('data:')) continue;
              const data = JSON.parse(line.slice(5));
              if (data.mode) {
                currentMode = data.mode;
                loader.classList.add('hidden');
                solutionSection.classList.remove('hidden');
              }
              if (data.content) {
                if (currentMode === 'thinking') { thoughtsBuffer += data.content; }
                else if (currentMode === 'answering') { answerBuffer += data.content; }
              }
            }
            scheduleUpdate();
          };
          while (true) {
            const { done, value } = await reader.read();
            if (done) {
              if (buffer) {
                const data = JSON.parse(buffer.slice(5));
                if (data.content) {
                  if (currentMode === 'thinking') { thoughtsBuffer += data.content; }
                  else if (currentMode === 'answering') { answerBuffer += data.content; }
                }
              }
              scheduleUpdate();
              break;
            }
            await processChunk(value);
          }
          stopTimer();
        } catch (error) {
          console.error('Erreur:', error);
          alert('Une erreur est survenue.');
          loader.classList.add('hidden');
          stopTimer();
        }
      });

      // Sauvegarde de la solution avec SweetAlert2
      saveButton.addEventListener('click', () => {
        const saveName = prompt("Entrez un nom pour la sauvegarde :");
        if (!saveName) return;
        const saveData = {
          answer: answerContent.innerHTML,
          thinking: thoughtsContent.innerHTML,
          date: new Date().toLocaleString()
        };
        let savedExercises = JSON.parse(localStorage.getItem('savedExercises') || '{}');
        savedExercises[saveName] = saveData;
        localStorage.setItem('savedExercises', JSON.stringify(savedExercises));
        Swal.fire({
          icon: 'success',
          title: 'Sauvegarde réussie',
          text: 'Votre solution a bien été sauvegardée !',
          timer: 2000,
          showConfirmButton: false
        });
      });

      // Chargement des sauvegardes dans le modal
      const loadSavedList = () => {
        savedList.innerHTML = '';
        const savedExercises = JSON.parse(localStorage.getItem('savedExercises') || '{}');
        for (const [name, data] of Object.entries(savedExercises)) {
          const li = document.createElement('li');
          li.innerHTML = `<button class="w-full text-left text-blue-600 hover:underline" data-save="${name}">${name} <span class="text-gray-500 text-xs">(${data.date})</span></button>`;
          savedList.appendChild(li);
        }
      };

      savedList.addEventListener('click', (e) => {
        if (e.target && e.target.dataset.save) {
          const saveName = e.target.dataset.save;
          const savedExercises = JSON.parse(localStorage.getItem('savedExercises') || '{}');
          const data = savedExercises[saveName];
          if (data) {
            form.classList.add('hidden');
            loader.classList.add('hidden');
            solutionSection.classList.remove('hidden');
            thoughtsContent.innerHTML = data.thinking;
            answerContent.innerHTML = data.answer;
            savedModal.classList.remove('active');
          }
        }
      });

      // Ouverture / fermeture du modal de sauvegardes
      openSaved.addEventListener('click', () => { loadSavedList(); savedModal.classList.add('active'); });
      closeSaved.addEventListener('click', () => { savedModal.classList.remove('active'); });

      // Bouton présent uniquement dans le modal pour lancer un nouvel exercice
      newExercise.addEventListener('click', () => {
        form.reset();
        form.classList.remove('hidden');
        solutionSection.classList.add('hidden');
        imagePreview.classList.add('hidden');
        thoughtsContent.innerHTML = '';
        answerContent.innerHTML = '';
        thoughtsBuffer = '';
        answerBuffer = '';
        savedModal.classList.remove('active');
      });
    });
  </script>
</body>
</html>