// Academy Auth Integration
// Kopplar academy-progress till quiXzoom inloggningssystem

class AcademyAuth {
  constructor() {
    this.apiUrl = 'https://api.quixzoom.com';
    this.token = this.getToken();
    this.user = this.getUser();
  }

  getToken() {
    // Kolla flera möjliga token-lagringar
    return localStorage.getItem('qz_token') || 
           localStorage.getItem('auth_token') || 
           sessionStorage.getItem('qz_token') ||
           this.getCookie('qz_session');
  }

  getUser() {
    try {
      return JSON.parse(localStorage.getItem('qz_user') || '{}');
    } catch {
      return {};
    }
  }

  getCookie(name) {
    const match = document.cookie.match(new RegExp('(^| )' + name + '=([^;]+)'));
    return match ? match[2] : null;
  }

  isLoggedIn() {
    return !!this.token;
  }

  // Hämta progress från backend
  async fetchProgress() {
    if (!this.isLoggedIn()) return null;
    
    try {
      const response = await fetch(`${this.apiUrl}/academy/progress`, {
        headers: {
          'Authorization': `Bearer ${this.token}`,
          'Content-Type': 'application/json'
        }
      });
      
      if (response.ok) {
        const data = await response.json();
        // Spara till localStorage som backup
        localStorage.setItem('academyProgress', JSON.stringify(data.completedLessons || []));
        return data;
      }
    } catch (error) {
      console.warn('Kunde inte hämta progress från backend:', error);
    }
    
    return null;
  }

  // Spara progress till backend
  async saveProgress(lessonId) {
    if (!this.isLoggedIn()) {
      // Spara lokalt tills användaren loggar in
      this.saveLocalProgress(lessonId);
      return false;
    }

    try {
      const response = await fetch(`${this.apiUrl}/academy/progress`, {
        method: 'POST',
        headers: {
          'Authorization': `Bearer ${this.token}`,
          'Content-Type': 'application/json'
        },
        body: JSON.stringify({ lessonId, completedAt: new Date().toISOString() })
      });

      if (response.ok) {
        // Uppdatera även localStorage
        this.saveLocalProgress(lessonId);
        return true;
      }
    } catch (error) {
      console.warn('Kunde inte spara progress till backend:', error);
      // Fallback till localStorage
      this.saveLocalProgress(lessonId);
    }

    return false;
  }

  saveLocalProgress(lessonId) {
    const progress = JSON.parse(localStorage.getItem('academyProgress') || '[]');
    if (!progress.includes(lessonId)) {
      progress.push(lessonId);
      localStorage.setItem('academyProgress', JSON.stringify(progress));
    }
  }

  // Visa inloggnings-prompt
  showLoginPrompt() {
    const prompt = document.createElement('div');
    prompt.id = 'academy-login-prompt';
    prompt.innerHTML = `
      <div style="position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,0.5);z-index:10000;display:flex;align-items:center;justify-content:center;padding:20px">
        <div style="background:white;border-radius:20px;padding:40px;max-width:400px;width:100%;text-align:center;box-shadow:0 20px 60px rgba(0,0,0,0.3)">
          <div style="font-size:48px;margin-bottom:16px">🔐</div>
          <h2 style="font-size:24px;font-weight:800;margin-bottom:12px">Logga in för att spara din progress</h2>
          <p style="color:#6E6E73;margin-bottom:24px">Dina lektioner och certifiering sparas till ditt quiXzoom-konto så du kan fortsätta på vilken enhet som helst.</p>
          <div style="display:flex;gap:12px;flex-direction:column">
            <a href="/login?redirect=/academy/" style="background:#0066FF;color:white;padding:16px;border-radius:12px;text-decoration:none;font-weight:700;font-size:16px">Logga in</a>
            <button onclick="document.getElementById('academy-login-prompt').remove()" style="background:#F5F5F7;color:#0A0A0A;padding:16px;border-radius:12px;border:none;font-weight:600;font-size:16px;cursor:pointer">Fortsätt utan inloggning</button>
          </div>
        </div>
      </div>
    `;
    document.body.appendChild(prompt);
  }

  // Hämta certifiering
  async getCertificate() {
    if (!this.isLoggedIn()) return null;

    try {
      const response = await fetch(`${this.apiUrl}/academy/certificate`, {
        headers: {
          'Authorization': `Bearer ${this.token}`
        }
      });

      if (response.ok) {
        return await response.json();
      }
    } catch (error) {
      console.warn('Kunde inte hämta certifikat:', error);
    }

    return null;
  }
}

// Initiera
const academyAuth = new AcademyAuth();

// Exportera för global användning
window.academyAuth = academyAuth;