{% extends "admin/layout.html" %}
{% block admin_title %}{% if is_edit %}{{ t.artists_edit_heading }}{% else %}{{ t.artists_new_heading }}{% endif %}{% endblock admin_title %}

{% block content %}
<h1>{% if is_edit %}{{ t.artists_edit_heading }}{% else %}{{ t.artists_new_heading }}{% endif %}</h1>

<form method="post" action="{% if is_edit %}/admin/artists/{{ form_artist_id }}/edit{% else %}/admin/artists/new{% endif %}">
  <table>
    <tr>
      <td><label for="name">{{ t.artists_name }}</label></td>
      <td><input name="name" id="name" value="{{ form_name }}" required style="width:100%"></td>
    </tr>
  </table>
  <button type="submit" style="margin-top: 1rem; padding: .5rem 1.5rem;">{{ t.settings_save }}</button>
</form>

{% if is_edit %}
<hr style="margin: 2rem 0;">
<h2>{{ t.artists_image }}</h2>

<div id="artist-image-section" style="margin-top: 1rem;">
  <!-- Current image -->
  <div style="margin-bottom: 1.5rem;">
    {% match current_image_url %}
      {% when Some with (url) %}
        <img id="current-image" src="{{ url }}" alt="" style="max-width: 200px; max-height: 200px; border-radius: 6px; border: 1px solid #ddd;">
        <br>
        <button type="button" onclick="removeImage()" style="margin-top: .5rem; padding: .3rem 1rem; cursor: pointer;">{{ t.artists_remove_image }}</button>
      {% when None %}
        <p style="color: #888;">{{ t.artists_no_image }}</p>
    {% endmatch %}
  </div>

  <!-- Upload custom image -->
  <div style="margin-bottom: 1.5rem;">
    <h3 style="font-size: .95rem; margin-bottom: .5rem;">{{ t.artists_upload_image }}</h3>
    <input type="file" id="image-upload" accept="image/*" style="margin-bottom: .5rem;">
    <br>
    <button type="button" id="upload-btn" onclick="uploadImage()" style="padding: .3rem 1rem; cursor: pointer;" disabled>{{ t.artists_upload }}</button>
  </div>

  <!-- Pick from album covers -->
  <div>
    <h3 style="font-size: .95rem; margin-bottom: .5rem;">{{ t.artists_pick_cover }}</h3>
    <div id="covers-grid" style="display: flex; flex-wrap: wrap; gap: .75rem;">
      <p style="color: #888;" id="covers-loading">...</p>
    </div>
  </div>
</div>

<script>
  const artistId = {{ form_artist_id }};

  // Enable upload button when file selected
  document.getElementById('image-upload').addEventListener('change', function() {
    document.getElementById('upload-btn').disabled = !this.files.length;
  });

  // Upload custom image
  function uploadImage() {
    const fileInput = document.getElementById('image-upload');
    const file = fileInput.files[0];
    if (!file) return;

    const reader = new FileReader();
    reader.onload = function() {
      const base64 = reader.result.split(',')[1];
      fetch('/admin/artists/' + artistId + '/upload-image', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          data: base64,
          filename: file.name,
          mime_type: file.type || 'image/jpeg'
        })
      }).then(function(r) {
        if (r.ok) location.reload();
        else r.text().then(function(t) { alert('Error: ' + t); });
      });
    };
    reader.readAsDataURL(file);
  }

  // Set image from album cover
  function setImage(mediaFileId) {
    fetch('/admin/artists/' + artistId + '/set-image', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ media_file_id: mediaFileId })
    }).then(function(r) {
      if (r.ok) location.reload();
      else r.text().then(function(t) { alert('Error: ' + t); });
    });
  }

  // Remove image
  function removeImage() {
    fetch('/admin/artists/' + artistId + '/set-image', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ media_file_id: null })
    }).then(function(r) {
      if (r.ok) location.reload();
      else r.text().then(function(t) { alert('Error: ' + t); });
    });
  }

  // Load available covers
  fetch('/admin/artists/' + artistId + '/available-covers')
    .then(function(r) { return r.json(); })
    .then(function(covers) {
      const grid = document.getElementById('covers-grid');
      grid.innerHTML = '';
      if (!covers.length) {
        grid.innerHTML = '<p style="color: #888;">{{ t.artists_no_covers }}</p>';
        return;
      }
      covers.forEach(function(c) {
        const div = document.createElement('div');
        div.style.cssText = 'cursor:pointer; text-align:center;';
        div.title = c.release_title;
        div.innerHTML = '<img src="' + c.cover_url + '" alt="" style="width:100px; height:100px; object-fit:cover; border-radius:4px; border:2px solid #ddd;">'
          + '<br><small style="font-size:.75rem; color:#666;">' + c.release_title.substring(0, 20) + '</small>';
        div.onclick = function() { setImage(c.media_file_id); };
        grid.appendChild(div);
      });
    })
    .catch(function() {
      document.getElementById('covers-grid').innerHTML = '<p style="color: #888;">{{ t.artists_no_covers }}</p>';
    });
</script>
{% endif %}
{% endblock content %}