{% extends 'base.html' %}

{% block title %}Competitor Video Analyzer — Free Online Tool{% endblock %}

{% block content %}
<div class="container py-5">

  <!-- Breadcrumb -->
  <nav aria-label="breadcrumb" class="mb-4">
    <ol class="breadcrumb">
      <li class="breadcrumb-item"><a href="{{ url_for('main.index') }}">Home</a></li>
      <li class="breadcrumb-item"><a href="{{ url_for('main.index') }}#seo">SEO Tools</a></li>
      <li class="breadcrumb-item active" aria-current="page">Competitor Video Analyzer</li>
    </ol>
  </nav>

  <!-- Page Header -->
  <div class="row mb-4">
    <div class="col">
      <h1 class="h2 fw-bold"><i class="fa-brands fa-youtube me-2 text-danger"></i>Competitor Video Analyzer</h1>
      <p class="text-muted">Analyze a YouTube channel's top videos — view counts, engagement, publish dates, and estimated SEO scores.</p>
    </div>
  </div>

  <!-- API Key Notice -->
  <div class="alert alert-info d-flex align-items-start mb-4" role="alert">
    <i class="fa-solid fa-circle-info me-3 mt-1 fs-5"></i>
    <div>
      <strong>YouTube API Key Required:</strong> This tool requires a valid YouTube Data API v3 key configured on the server.
      If no key is configured you will see a friendly error message below. You can obtain a free API key from the
      <a href="https://console.cloud.google.com/" target="_blank" rel="noopener">Google Cloud Console</a>.
    </div>
  </div>

  <div class="row g-4">
    <!-- Form -->
    <div class="col-lg-4">
      <div class="card shadow-sm border-0">
        <div class="card-body p-4">
          <h5 class="fw-semibold mb-4"><i class="fa-solid fa-magnifying-glass me-2 text-primary"></i>Channel Details</h5>

          <div class="mb-3">
            <label for="channelUrl" class="form-label fw-semibold">YouTube Channel URL / Username <span class="text-danger">*</span></label>
            <input type="text" id="channelUrl" class="form-control"
                   placeholder="https://www.youtube.com/@ChannelName" required>
            <div class="form-text">Paste the full channel URL or @username.</div>
          </div>

          <div class="mb-4">
            <label for="maxVideos" class="form-label fw-semibold">Max Videos to Analyze</label>
            <select id="maxVideos" class="form-select">
              <option value="10" selected>10 videos</option>
              <option value="25">25 videos</option>
              <option value="50">50 videos</option>
            </select>
          </div>

          <!-- Error Alert -->
          <div id="errorAlert" class="alert alert-danger d-none" role="alert">
            <i class="fa-solid fa-circle-xmark me-2"></i>
            <span id="errorMsg"></span>
          </div>

          <div class="d-grid">
            <button id="submitBtn" type="button" class="btn btn-danger btn-lg">
              <i class="fa-brands fa-youtube me-2"></i>Analyze Channel
            </button>
          </div>
        </div>
      </div>
    </div>

    <!-- Results -->
    <div class="col-lg-8">
      <!-- Loading -->
      <div id="loadingCard" class="card shadow-sm border-0 d-none">
        <div class="card-body p-5 text-center">
          <div class="spinner-border text-danger mb-3" style="width:3rem;height:3rem;" role="status">
            <span class="visually-hidden">Analyzing...</span>
          </div>
          <p class="fw-semibold mb-0">Fetching channel data…</p>
          <p class="text-muted small">Contacting YouTube API, please wait.</p>
        </div>
      </div>

      <!-- Results Table -->
      <div id="resultsSection" class="d-none">
        <div class="card shadow-sm border-0">
          <div class="card-header bg-danger text-white fw-semibold d-flex justify-content-between align-items-center">
            <span><i class="fa-solid fa-table me-2"></i>Channel Video Analysis</span>
            <span id="channelName" class="badge bg-light text-dark"></span>
          </div>
          <div class="card-body p-0">
            <div class="table-responsive">
              <table class="table table-hover table-striped mb-0 align-middle small">
                <thead class="table-dark">
                  <tr>
                    <th>#</th>
                    <th>Video Title</th>
                    <th class="text-end">Views</th>
                    <th class="text-end">Likes</th>
                    <th>Published</th>
                    <th class="text-center">SEO Score</th>
                  </tr>
                </thead>
                <tbody id="videoTableBody"></tbody>
              </table>
            </div>
          </div>
        </div>
      </div>

      <!-- Placeholder -->
      <div id="placeholderCard" class="card border-0 bg-light">
        <div class="card-body p-5 text-center text-muted">
          <i class="fa-brands fa-youtube fa-3x mb-3 opacity-25"></i>
          <p class="mb-0">Video analysis results will appear here.</p>
        </div>
      </div>
    </div>
  </div>
</div>
{% endblock %}

{% block scripts %}
<script>
(function () {
  'use strict';

  const submitBtn      = document.getElementById('submitBtn');
  const errorAlert     = document.getElementById('errorAlert');
  const errorMsg       = document.getElementById('errorMsg');
  const loadingCard    = document.getElementById('loadingCard');
  const resultsSection = document.getElementById('resultsSection');
  const placeholder    = document.getElementById('placeholderCard');

  function showError(msg) {
    errorMsg.textContent = msg;
    errorAlert.classList.remove('d-none');
    loadingCard.classList.add('d-none');
    placeholder.classList.remove('d-none');
    resultsSection.classList.add('d-none');
  }

  function formatNum(n) {
    if (n === undefined || n === null) return '—';
    return Number(n).toLocaleString();
  }

  function seoScoreBadge(score) {
    const s = parseInt(score) || 0;
    let cls = 'bg-danger';
    if (s >= 70) cls = 'bg-success';
    else if (s >= 40) cls = 'bg-warning text-dark';
    return `<span class="badge ${cls}">${s}/100</span>`;
  }

  submitBtn.addEventListener('click', async () => {
    const channelUrl = document.getElementById('channelUrl').value.trim();
    const maxVideos  = document.getElementById('maxVideos').value;

    if (!channelUrl) { showError('Please enter a YouTube channel URL or username.'); return; }

    errorAlert.classList.add('d-none');
    loadingCard.classList.remove('d-none');
    resultsSection.classList.add('d-none');
    placeholder.classList.add('d-none');
    submitBtn.disabled = true;

    try {
      const resp = await fetch('/tools/seo/competitor-video/analyze', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ channel_url: channelUrl, max_videos: parseInt(maxVideos) })
      });

      const data = await resp.json();
      if (!resp.ok) throw new Error(data.error || 'Server error ' + resp.status);

      document.getElementById('channelName').textContent = data.channel_name || channelUrl;

      const tbody = document.getElementById('videoTableBody');
      tbody.innerHTML = '';
      const videos = data.videos || [];
      if (videos.length === 0) {
        tbody.innerHTML = '<tr><td colspan="6" class="text-center text-muted py-4">No videos found.</td></tr>';
      } else {
        videos.forEach((v, i) => {
          const tr = document.createElement('tr');
          tr.innerHTML = `
            <td class="text-muted">${i + 1}</td>
            <td><a href="${escHtml(v.url || '#')}" target="_blank" rel="noopener" class="text-decoration-none">${escHtml(v.title)}</a></td>
            <td class="text-end fw-semibold">${formatNum(v.views)}</td>
            <td class="text-end">${formatNum(v.likes)}</td>
            <td class="text-nowrap">${escHtml(v.publish_date || '—')}</td>
            <td class="text-center">${seoScoreBadge(v.seo_score)}</td>`;
          tbody.appendChild(tr);
        });
      }

      loadingCard.classList.add('d-none');
      resultsSection.classList.remove('d-none');
    } catch (err) {
      showError(err.message);
    } finally {
      submitBtn.disabled = false;
    }
  });

  function escHtml(str) {
    return String(str).replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;').replace(/"/g,'&quot;');
  }
})();
</script>
{% endblock %}