const API_BASE = 'https://hermes.squaremcp.com';

// State
let currentUser = null;
let isAdmin = false;

// DOM refs
const loginView = document.getElementById('login-view');
const resetRequestView = document.getElementById('reset-request-view');
const resetConfirmView = document.getElementById('reset-confirm-view');
const dashboardView = document.getElementById('dashboard-view');
const loginForm = document.getElementById('login-form');
const signupForm = document.getElementById('signup-form');
const resetRequestForm = document.getElementById('reset-request-form');
const resetConfirmForm = document.getElementById('reset-confirm-form');
const loginError = document.getElementById('login-error');
const signupError = document.getElementById('signup-error');
const tabBtns = document.querySelectorAll('.tab-btn');
const userEmail = document.getElementById('user-email');
const logoutBtn = document.getElementById('logout-btn');
const modal = document.getElementById('connect-modal');
const modalBody = document.getElementById('modal-body');
const modalClose = document.querySelector('.modal-close');
const modalBackdrop = document.querySelector('.modal-backdrop');
const navLinks = document.querySelectorAll('.nav-link');
const platformGrid = document.querySelector('.platform-grid');
const invoicesSection = document.getElementById('invoices-section');
const adminSection = document.getElementById('admin-section');
const adminNav = document.getElementById('admin-nav');

// Platform config
const PLATFORM_CONFIG = {
  tiktok: {
    name: 'TikTok',
    type: 'oauth',
    oauthUrl: 'https://tiktok.squaremcp.com/auth/tiktok/start',
    scopes: 'user.info.basic,user.info.profile,user.info.stats,video.list,video.publish',
  },
  facebook: {
    name: 'Facebook',
    type: 'token',
    fields: [
      { key: 'accessToken', label: 'Page Access Token', type: 'password' },
      { key: 'pageId', label: 'Page ID', type: 'text' },
    ],
    help: 'Get your Page Access Token from the Facebook Graph API Explorer. Run GET /me/accounts and copy the access_token for your page.',
  },
  instagram: {
    name: 'Instagram',
    type: 'token',
    fields: [
      { key: 'accessToken', label: 'Instagram Access Token', type: 'password' },
      { key: 'businessAccountId', label: 'Business Account ID', type: 'text' },
    ],
    help: 'Your Instagram account must be a Business/Creator account connected to a Facebook Page. Get the token from Graph API Explorer with instagram_basic scope.',
  },
  linkedin: {
    name: 'LinkedIn',
    type: 'token',
    fields: [
      { key: 'accessToken', label: 'LinkedIn Access Token', type: 'password' },
    ],
    help: 'Generate an access token from the LinkedIn Developer Portal with w_member_social scope.',
  },
  twitter: {
    name: 'Twitter / X',
    type: 'token',
    fields: [
      { key: 'accessToken', label: 'Access Token', type: 'password' },
      { key: 'accessTokenSecret', label: 'Access Token Secret', type: 'password' },
      { key: 'apiKey', label: 'API Key', type: 'password' },
      { key: 'apiSecret', label: 'API Secret', type: 'password' },
    ],
    help: 'Get all four values from the Twitter Developer Portal under Keys and Tokens.',
  },
  telegram: {
    name: 'Telegram',
    type: 'token',
    fields: [
      { key: 'accessToken', label: 'Bot Token', type: 'password' },
    ],
    help: 'Message @BotFather on Telegram and create a new bot. Copy the token it gives you.',
  },
  discord: {
    name: 'Discord',
    type: 'token',
    fields: [
      { key: 'accessToken', label: 'Bot Token', type: 'password' },
    ],
    help: 'Go to discord.com/developers/applications → New Application → Bot → Reset Token.',
  },
  whatsapp: {
    name: 'WhatsApp',
    type: 'token',
    fields: [
      { key: 'accessToken', label: 'Access Token', type: 'password' },
      { key: 'phoneNumberId', label: 'Phone Number ID', type: 'text' },
      { key: 'businessAccountId', label: 'Business Account ID', type: 'text' },
    ],
    help: 'From Meta Business Settings → WhatsApp → API Setup. You need a verified business phone number.',
  },
  email: {
    name: 'Email',
    type: 'token',
    fields: [
      { key: 'host', label: 'IMAP Host', type: 'text' },
      { key: 'port', label: 'IMAP Port', type: 'text' },
      { key: 'user', label: 'Email Address', type: 'email' },
      { key: 'password', label: 'App Password', type: 'password' },
      { key: 'smtpHost', label: 'SMTP Host', type: 'text' },
      { key: 'smtpPort', label: 'SMTP Port', type: 'text' },
    ],
    help: 'Use an app-specific password (not your login password). Common hosts: Gmail=smtp.gmail.com, Yahoo=smtp.mail.yahoo.com.',
  },
};

// Auth helpers
async function apiPost(path, body) {
  const res = await fetch(`${API_BASE}${path}`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    credentials: 'include',
    body: JSON.stringify(body),
  });
  return res.json();
}

async function apiGet(path) {
  const res = await fetch(`${API_BASE}${path}`, { credentials: 'include' });
  return res.json();
}

// Views
function hideAllViews() {
  loginView.classList.add('hidden');
  resetRequestView.classList.add('hidden');
  resetConfirmView.classList.add('hidden');
  dashboardView.classList.add('hidden');
}

function showLogin() {
  hideAllViews();
  loginView.classList.remove('hidden');
}

function showDashboard() {
  hideAllViews();
  dashboardView.classList.remove('hidden');
  userEmail.textContent = currentUser?.email || '';
  updateConnectionStatus();
  updateUsage();
  loadInvoices();
  if (isAdmin) loadAdminPanel();
}

// Tab switching
tabBtns.forEach(btn => {
  btn.addEventListener('click', () => {
    tabBtns.forEach(b => b.classList.remove('active'));
    btn.classList.add('active');
    const tab = btn.dataset.tab;
    if (tab === 'login') {
      loginForm.classList.remove('hidden');
      signupForm.classList.add('hidden');
    } else {
      loginForm.classList.add('hidden');
      signupForm.classList.remove('hidden');
    }
  });
});

// Navigation
navLinks.forEach(link => {
  link.addEventListener('click', () => {
    navLinks.forEach(l => l.classList.remove('active'));
    link.classList.add('active');
    const view = link.dataset.view;
    platformGrid.classList.toggle('hidden', view !== 'platforms');
    document.querySelector('.welcome').classList.toggle('hidden', view !== 'platforms');
    document.querySelector('.usage-bar').classList.toggle('hidden', view !== 'platforms');
    invoicesSection.classList.toggle('hidden', view !== 'invoices');
    adminSection.classList.toggle('hidden', view !== 'admin');
  });
});

// Login
loginForm.addEventListener('submit', async (e) => {
  e.preventDefault();
  loginError.textContent = '';
  const fd = new FormData(loginForm);
  const data = await apiPost('/api/auth/login', {
    email: fd.get('email'),
    password: fd.get('password'),
  });
  if (data.error) {
    loginError.textContent = data.error;
    return;
  }
  currentUser = data;
  isAdmin = data.plan === 'enterprise'; // simplistic admin check
  showDashboard();
});

// Signup
signupForm.addEventListener('submit', async (e) => {
  e.preventDefault();
  signupError.textContent = '';
  const fd = new FormData(signupForm);
  const data = await apiPost('/api/auth/signup', {
    email: fd.get('email'),
    password: fd.get('password'),
  });
  if (data.error) {
    signupError.textContent = data.error;
    return;
  }
  currentUser = data;
  isAdmin = false;
  showDashboard();
});

// Logout
logoutBtn.addEventListener('click', async () => {
  await apiPost('/api/auth/logout', {});
  currentUser = null;
  isAdmin = false;
  showLogin();
});

// Password reset request
resetRequestForm?.addEventListener('submit', async (e) => {
  e.preventDefault();
  const errorEl = document.getElementById('reset-request-error');
  const successEl = document.getElementById('reset-request-success');
  errorEl.textContent = '';
  successEl.textContent = '';
  const fd = new FormData(resetRequestForm);
  const data = await apiPost('/api/auth/forgot-password', { email: fd.get('email') });
  if (data.resetUrl) {
    successEl.textContent = `Reset link: ${data.resetUrl}`;
  } else {
    successEl.textContent = data.message;
  }
});

document.getElementById('back-to-login')?.addEventListener('click', (e) => {
  e.preventDefault();
  showLogin();
});

// Password reset confirm
resetConfirmForm?.addEventListener('submit', async (e) => {
  e.preventDefault();
  const errorEl = document.getElementById('reset-confirm-error');
  const successEl = document.getElementById('reset-confirm-success');
  errorEl.textContent = '';
  successEl.textContent = '';
  const fd = new FormData(resetConfirmForm);
  const urlParams = new URLSearchParams(window.location.search);
  const token = urlParams.get('token');
  if (!token) {
    errorEl.textContent = 'Missing reset token';
    return;
  }
  const data = await apiPost('/api/auth/reset-password', {
    token,
    password: fd.get('password'),
  });
  if (data.error) {
    errorEl.textContent = data.error;
    return;
  }
  successEl.textContent = 'Password updated! Redirecting to login...';
  setTimeout(() => {
    window.location.href = '/';
  }, 2000);
});

// Add forgot password link to login form
const forgotLink = document.createElement('a');
forgotLink.href = '#';
forgotLink.textContent = 'Forgot password?';
forgotLink.style.cssText = 'color:#888;font-size:13px;text-align:center;display:block;margin-top:8px;';
forgotLink.addEventListener('click', (e) => {
  e.preventDefault();
  hideAllViews();
  resetRequestView.classList.remove('hidden');
});
loginForm.appendChild(forgotLink);

// Connection status
async function updateConnectionStatus() {
  try {
    const data = await apiGet('/api/connections');
    const connections = data.connections || {};
    document.querySelectorAll('.platform-card').forEach(card => {
      const platform = card.dataset.platform;
      const badge = card.querySelector('.status-badge');
      const btn = card.querySelector('.btn-connect');
      if (connections[platform]) {
        badge.textContent = 'Connected';
        badge.classList.remove('disconnected');
        badge.classList.add('connected');
        btn.textContent = 'Manage';
      } else {
        badge.textContent = 'Not connected';
        badge.classList.remove('connected');
        badge.classList.add('disconnected');
        btn.textContent = 'Connect';
      }
    });
  } catch {
    // ignore
  }
}

// Usage
async function updateUsage() {
  try {
    const data = await apiGet('/api/usage');
    const badge = document.getElementById('plan-badge');
    const text = document.getElementById('usage-text');
    const fill = document.getElementById('usage-bar-fill');
    badge.textContent = data.plan;
    if (data.monthlyLimit === -1) {
      text.textContent = `${data.used} calls (unlimited)`;
      fill.style.width = '5%';
      fill.className = 'usage-bar-fill';
    } else {
      text.textContent = `${data.used} / ${data.monthlyLimit} calls this month`;
      const pct = Math.min(100, (data.used / data.monthlyLimit) * 100);
      fill.style.width = pct + '%';
      fill.className = 'usage-bar-fill' + (pct > 90 ? ' danger' : pct > 70 ? ' warning' : '');
    }
  } catch {
    // ignore
  }
}

// Invoices
async function loadInvoices() {
  try {
    const data = await apiGet('/api/invoices');
    const list = document.getElementById('invoices-list');
    const invoices = data.invoices || [];
    if (!invoices.length) {
      list.innerHTML = '<p style="color:#888;font-size:14px;">No invoices yet.</p>';
      return;
    }
    list.innerHTML = invoices.map(inv => `
      <div class="invoice-item">
        <div>
          <div class="inv-num">${inv.invoice_number}</div>
          <div class="inv-period">${inv.period_start} → ${inv.period_end}</div>
        </div>
        <div style="text-align:right;">
          <div class="inv-amount">$${inv.amount}</div>
          <span class="inv-status ${inv.status}">${inv.status}</span>
        </div>
      </div>
    `).join('');
  } catch {
    document.getElementById('invoices-list').innerHTML = '<p style="color:#888;font-size:14px;">Failed to load invoices.</p>';
  }
}

// Admin panel
async function loadAdminPanel() {
  try {
    const data = await apiGet('/api/admin/customers');
    const container = document.getElementById('admin-customers');
    const customers = data.customers || [];
    container.innerHTML = `
      <table class="admin-table">
        <thead><tr><th>Email</th><th>Plan</th><th>Role</th><th>Active</th><th>Joined</th><th>Actions</th></tr></thead>
        <tbody>
          ${customers.map(c => `
            <tr>
              <td>${c.email}</td>
              <td>${c.plan}</td>
              <td>${c.role}</td>
              <td>${c.active ? 'Yes' : 'No'}</td>
              <td>${new Date(c.created_at).toLocaleDateString()}</td>
              <td><button class="btn btn-small btn-connect" data-cid="${c.id}" onclick="generateInvoice('${c.id}')">Invoice</button></td>
            </tr>
          `).join('')}
        </tbody>
      </table>
    `;
  } catch {
    document.getElementById('admin-customers').innerHTML = '<p style="color:#888;font-size:14px;padding:20px;">Failed to load admin data.</p>';
  }
}

window.generateInvoice = async function(customerId) {
  try {
    const res = await fetch(`${API_BASE}/api/admin/customers/${customerId}/invoice`, {
      method: 'POST',
      credentials: 'include',
    });
    const data = await res.json();
    if (data.error) {
      alert(data.error);
      return;
    }
    alert(`Invoice ${data.invoice_number} created for $${data.amount}`);
    loadAdminPanel();
  } catch {
    alert('Failed to generate invoice');
  }
};

// Modal
function openModal(html) {
  modalBody.innerHTML = html;
  modal.classList.remove('hidden');
}

function closeModal() {
  modal.classList.add('hidden');
  modalBody.innerHTML = '';
}

modalClose.addEventListener('click', closeModal);
modalBackdrop.addEventListener('click', closeModal);

// Platform connection
function renderConnectForm(platform) {
  const cfg = PLATFORM_CONFIG[platform];
  if (!cfg) return '';

  if (cfg.type === 'oauth') {
    const state = btoa(JSON.stringify({ platform, user: currentUser?.id }));
    const url = `${cfg.oauthUrl}?state=${encodeURIComponent(state)}&scope=${encodeURIComponent(cfg.scopes)}`;
    return `
      <div class="connect-form">
        <h3>Connect ${cfg.name}</h3>
        <p>You'll be redirected to ${cfg.name} to authorize SquareMCP.</p>
        <div class="instructions">${cfg.help || ''}</div>
        <a href="${url}" target="_blank" class="btn btn-primary" style="text-align:center;text-decoration:none;display:inline-block;">Connect with ${cfg.name}</a>
      </div>
    `;
  }

  const fieldsHtml = cfg.fields.map(f => `
    <label>${f.label}</label>
    <input type="${f.type}" name="${f.key}" placeholder="${f.label}" required>
  `).join('');

  return `
    <form class="connect-form" data-platform="${platform}">
      <h3>Connect ${cfg.name}</h3>
      <p>Paste your credentials below. They are encrypted and stored securely.</p>
      ${fieldsHtml}
      <div class="instructions">${cfg.help}</div>
      <button type="submit" class="btn btn-primary">Save Connection</button>
      <p class="error-msg" id="connect-error"></p>
    </form>
  `;
}

document.querySelectorAll('.btn-connect').forEach(btn => {
  btn.addEventListener('click', () => {
    const platform = btn.dataset.platform;
    openModal(renderConnectForm(platform));

    const form = modalBody.querySelector('form.connect-form');
    if (form) {
      form.addEventListener('submit', async (e) => {
        e.preventDefault();
        const errorEl = document.getElementById('connect-error');
        errorEl.textContent = '';
        errorEl.style.color = '#dc2626';
        const fd = new FormData(form);
        const credentials = {};
        for (const [key, value] of fd.entries()) {
          credentials[key] = value;
        }

        try {
          const res = await fetch(`${API_BASE}/api/connect/${platform}`, {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            credentials: 'include',
            body: JSON.stringify(credentials),
          });
          const data = await res.json();
          if (data.error) {
            errorEl.textContent = data.error;
            return;
          }
          errorEl.textContent = 'Connected successfully!';
          errorEl.style.color = '#10a37f';
          setTimeout(() => {
            closeModal();
            updateConnectionStatus();
          }, 1000);
        } catch (err) {
          errorEl.textContent = 'Network error. Please try again.';
        }
      });
    }
  });
});

// Check session on load
async function checkSession() {
  // Check for reset token in URL
  const urlParams = new URLSearchParams(window.location.search);
  if (urlParams.get('token')) {
    hideAllViews();
    resetConfirmView.classList.remove('hidden');
    return;
  }

  try {
    const data = await apiGet('/api/auth/me');
    if (data.id) {
      currentUser = data;
      isAdmin = data.plan === 'enterprise';
      if (isAdmin) adminNav.classList.remove('hidden');
      showDashboard();
    } else {
      showLogin();
    }
  } catch {
    showLogin();
  }
}

// Init
checkSession();