{% extends 'base.html' %}
{% block content %}
<div class="container" style="max-width:980px;">
  <div class="d-flex align-items-center justify-content-between mb-3">
    <h3 class="mb-0">
      <i class="bi bi-palette me-2"></i> Branding Settings
    </h3>
    <div class="d-flex gap-2">
      <a href="{{ url_for('admin.branding_settings') }}" class="btn btn-outline-secondary">
        <i class="bi bi-arrow-counterclockwise me-1"></i> Reset to Saved
      </a>
      <!-- Optional: Hook this to a backend defaults action if you like -->
      <button type="button" class="btn btn-outline-danger" id="applyDefaultsBtn">
        <i class="bi bi-magic me-1"></i> Apply Defaults
      </button>
    </div>
  </div>

  <form method="post" enctype="multipart/form-data" class="card border-0 shadow-sm">
    <div class="card-body">
      <div class="row g-4">
        <!-- Colors -->
        <div class="col-lg-7">
          <div class="card h-100 border-0">
            <div class="card-header bg-light">
              <strong>Colors</strong>
            </div>
            <div class="card-body">
              <!-- Sidebar color -->
              <div class="row g-2 align-items-center mb-3">
                <div class="col-12 col-md-5">
                  <label class="form-label mb-1">Sidebar Color</label>
                  <div class="d-flex align-items-center gap-2">
                    <input type="color" class="form-control form-control-color flex-shrink-0"
                           id="sidebarColor" value="{{ bs.sidebar_bg or theme.sidebar_bg }}">
                    <input type="text" class="form-control" id="sidebarHex"
                           value="{{ bs.sidebar_bg or theme.sidebar_bg }}" maxlength="7" placeholder="#0054A6">
                  </div>
                </div>
                <div class="col-12 col-md-7">
                  <div class="d-flex flex-wrap gap-2 mt-2 mt-md-4">
                    {% set sidebar_swatches = ['#0054A6','#0d6efd','#1f2937','#111827','#34495E','#2C3E50','#6C5CE7','#2E86C1'] %}
                    {% for c in sidebar_swatches %}
                      <button type="button" class="btn btn-sm border pick-swatch" data-target="sidebar" data-value="{{ c }}"
                              style="background: {{ c }}; width:28px; height:28px;"></button>
                    {% endfor %}
                  </div>
                </div>
              </div>

              <!-- Topbar color -->
              <div class="row g-2 align-items-center mb-3">
                <div class="col-12 col-md-5">
                  <label class="form-label mb-1">Topbar Color</label>
                  <div class="d-flex align-items-center gap-2">
                    <input type="color" class="form-control form-control-color flex-shrink-0"
                           id="topbarColor" value="{{ bs.topbar_bg or theme.topbar_bg }}">
                    <input type="text" class="form-control" id="topbarHex"
                           value="{{ bs.topbar_bg or theme.topbar_bg }}" maxlength="7" placeholder="#0054A6">
                  </div>
                </div>
                <div class="col-12 col-md-7">
                  <div class="d-flex flex-wrap gap-2 mt-2 mt-md-4">
                    {% set topbar_swatches = ['#0054A6','#0d6efd','#1D3557','#9B2226','#0E7490','#16A34A','#7C3AED','#111827'] %}
                    {% for c in topbar_swatches %}
                      <button type="button" class="btn btn-sm border pick-swatch" data-target="topbar" data-value="{{ c }}"
                              style="background: {{ c }}; width:28px; height:28px;"></button>
                    {% endfor %}
                  </div>
                </div>
              </div>

              <!-- Accent color -->
              <div class="row g-2 align-items-center">
                <div class="col-12 col-md-5">
                  <label class="form-label mb-1">Accent (Hover)</label>
                  <div class="d-flex align-items-center gap-2">
                    <input type="color" class="form-control form-control-color flex-shrink-0"
                           id="accentColor" value="{{ bs.accent or theme.accent }}">
                    <input type="text" class="form-control" id="accentHex"
                           value="{{ bs.accent or theme.accent }}" maxlength="7" placeholder="#F47C20">
                  </div>
                </div>
                <div class="col-12 col-md-7">
                  <div class="d-flex flex-wrap gap-2 mt-2 mt-md-4">
                    {% set accent_swatches = ['#F47C20','#F59E0B','#E11D48','#10B981','#06B6D4','#A855F7','#22C55E','#EF4444'] %}
                    {% for c in accent_swatches %}
                      <button type="button" class="btn btn-sm border pick-swatch" data-target="accent" data-value="{{ c }}"
                              style="background: {{ c }}; width:28px; height:28px;"></button>
                    {% endfor %}
                  </div>
                </div>
              </div>

              <div class="alert alert-info mt-3 py-2">
                <i class="bi bi-lightning-charge me-1"></i>
                Live preview is ON. Changes reflect immediately—save to persist.
              </div>
            </div>
          </div>
        </div>

        <!-- Logo -->
        <div class="col-lg-5">
          <div class="card h-100 border-0">
            <div class="card-header bg-light">
              <strong>Logo</strong>
            </div>
            <div class="card-body">
              <div class="text-center mb-3">
                <img id="logoPreview" src="{{ theme.logo_url }}?v={{ theme.version }}" alt="Logo" style="max-height:70px;">
              </div>
              <input type="file" name="logo_file" id="logoFile"
                     accept=".png,.jpg,.jpeg,.gif,.svg,.webp" class="form-control">
              <div class="form-text">Transparent PNG or SVG recommended. Max 1 MB.</div>
              <div id="logoMsg" class="small mt-2 text-muted"></div>
            </div>
          </div>
        </div>
      </div> <!-- /row -->
    </div>

    <div class="card-footer bg-white d-flex justify-content-between align-items-center">
      <div class="d-flex align-items-center gap-2">
        <span class="badge text-bg-secondary">Preview</span>
        <div class="form-check form-switch">
          <input class="form-check-input" type="checkbox" id="livePreview" checked>
          <label class="form-check-label" for="livePreview">Live Preview</label>
        </div>
      </div>
      <div class="d-flex gap-2">
        <button class="btn btn-primary">
          <i class="bi bi-check2-circle me-1"></i> Save Changes
        </button>
      </div>
    </div>

    {# Hidden inputs MUST live inside the form so values post correctly #}
    <input type="hidden" name="sidebar_bg" id="sidebarHidden" value="{{ bs.sidebar_bg or theme.sidebar_bg }}">
    <input type="hidden" name="topbar_bg"  id="topbarHidden"  value="{{ bs.topbar_bg  or theme.topbar_bg }}">
    <input type="hidden" name="accent"     id="accentHidden"  value="{{ bs.accent     or theme.accent }}">
  </form>

  <!-- Visual Mock Preview -->
  <div class="card border-0 shadow-sm mt-4">
    <div class="card-header bg-light d-flex justify-content-between align-items-center">
      <strong>Interface Preview</strong>
      <small class="text-muted">Mockup of how the app will look</small>
    </div>
    <div class="card-body">
      <div class="border rounded overflow-hidden" id="mockApp" style="min-height:180px;">
        <div id="mockTopbar" class="px-3 py-2 text-white d-flex align-items-center justify-content-between"
             style="background: {{ bs.topbar_bg or theme.topbar_bg }}">
          <div class="d-flex align-items-center gap-2">
            <img src="{{ theme.logo_url }}?v={{ theme.version }}" style="height:24px;">
            <span class="small">Topbar</span>
          </div>
          <div class="small opacity-75">User · Notifications</div>
        </div>
        <div class="d-flex">
          <div id="mockSidebar" class="text-white p-2" style="width:180px; background: {{ bs.sidebar_bg or theme.sidebar_bg }}">
            <div class="small mb-2">Sidebar</div>
            <div><span class="badge rounded-1" id="mockHover" style="background: {{ bs.accent or theme.accent }}">Hover</span></div>
          </div>
          <div class="p-3 flex-grow-1">
            <div class="small text-muted">Your content goes here…</div>
            <button type="button" class="btn btn-sm mt-2" id="mockButton">Action</button>
          </div>
        </div>
      </div>
    </div>
  </div>
</div>

<script>
(function(){
  // ===== Helpers =====
  const $ = (s, r=document) => r.querySelector(s);
  const setVar = (name,val) => document.documentElement.style.setProperty(name, val);
  const isHex = v => /^#([0-9A-Fa-f]{6})$/.test(v || '');

  // Bind color+hex pairs
  function bindPair(colorEl, hexEl, hiddenEl, cssVar, previewCb){
    const syncToHex = () => { hexEl.value = colorEl.value.toUpperCase(); updateAll(); };
    const syncToColor = () => {
      let v = hexEl.value.trim();
      if (!v.startsWith('#')) v = '#'+v;
      if (isHex(v)) { colorEl.value = v; updateAll(); }
      else { hexEl.classList.add('is-invalid'); return; }
      hexEl.classList.remove('is-invalid');
    };
    colorEl.addEventListener('input', syncToHex);
    hexEl.addEventListener('input', syncToColor);

    function updateAll(){
      hiddenEl.value = colorEl.value;
      setVar(cssVar, colorEl.value);
      previewCb && previewCb(colorEl.value);
    }
    // init
    updateAll();
  }

  // Elements
  const el = {
    // pairs
    sidebarColor: $('#sidebarColor'),
    sidebarHex:   $('#sidebarHex'),
    sidebarHidden:$('#sidebarHidden'),

    topbarColor:  $('#topbarColor'),
    topbarHex:    $('#topbarHex'),
    topbarHidden: $('#topbarHidden'),

    accentColor:  $('#accentColor'),
    accentHex:    $('#accentHex'),
    accentHidden: $('#accentHidden'),

    // preview bits
    mockTopbar:   $('#mockTopbar'),
    mockSidebar:  $('#mockSidebar'),
    mockHover:    $('#mockHover'),
    mockButton:   $('#mockButton'),

    // switches & buttons
    livePreview:  $('#livePreview'),
    applyDefaultsBtn: $('#applyDefaultsBtn'),

    // logo
    logoFile:     $('#logoFile'),
    logoPreview:  $('#logoPreview'),
    logoMsg:      $('#logoMsg'),
  };

  // ===== Live preview switch =====
  let live = true;
  el.livePreview.addEventListener('change', () => {
    live = el.livePreview.checked;
    if (!live) window.location.reload(); // revert to saved theme
  });

  // ===== Bind pairs =====
  bindPair(
    el.sidebarColor, el.sidebarHex, el.sidebarHidden, '--sidebar-bg',
    (v)=>{ if(live){ el.mockSidebar.style.background = v; } }
  );
  bindPair(
    el.topbarColor, el.topbarHex, el.topbarHidden, '--topbar-bg',
    (v)=>{ if(live){ el.mockTopbar.style.background = v; } }
  );
  bindPair(
    el.accentColor, el.accentHex, el.accentHidden, '--accent',
    (v)=>{ if(live){ el.mockHover.style.background = v; } }
  );

  // ===== Swatch pickers =====
  document.querySelectorAll('.pick-swatch').forEach(btn=>{
    btn.addEventListener('click', ()=>{
      const target = btn.getAttribute('data-target');
      const val = btn.getAttribute('data-value');
      if (target==='sidebar'){ el.sidebarHex.value=val; el.sidebarHex.dispatchEvent(new Event('input')); }
      if (target==='topbar'){  el.topbarHex.value=val;  el.topbarHex.dispatchEvent(new Event('input')); }
      if (target==='accent'){  el.accentHex.value=val;  el.accentHex.dispatchEvent(new Event('input')); }
    });
  });

  // ===== Apply Defaults (client-side quick test) =====
  el.applyDefaultsBtn.addEventListener('click', ()=>{
    const defs = { sidebar:'#0054A6', topbar:'#0054A6', accent:'#F47C20' };
    el.sidebarHex.value = defs.sidebar; el.sidebarHex.dispatchEvent(new Event('input'));
    el.topbarHex.value  = defs.topbar;  el.topbarHex.dispatchEvent(new Event('input'));
    el.accentHex.value  = defs.accent;  el.accentHex.dispatchEvent(new Event('input'));
  });

  // ===== Logo preview + size guard =====
  el.logoFile.addEventListener('change', ()=>{
    const f = el.logoFile.files && el.logoFile.files[0];
    if (!f) return;
    const mb = f.size / (1024*1024);
    if (mb > 1.0){
      el.logoMsg.textContent = 'File too large (max 1 MB).';
      el.logoMsg.classList.remove('text-muted'); el.logoMsg.classList.add('text-danger');
      el.logoFile.value = '';
      return;
    }
    el.logoMsg.textContent = `${f.name} • ${(mb).toFixed(2)} MB`;
    el.logoMsg.classList.remove('text-danger'); el.logoMsg.classList.add('text-muted');

    const reader = new FileReader();
    reader.onload = e => { el.logoPreview.src = e.target.result; };
    reader.readAsDataURL(f);
  });

  // ===== Mock button hover uses accent color =====
  el.mockButton.addEventListener('mouseenter', ()=>{
    el.mockButton.style.background = getComputedStyle(document.documentElement).getPropertyValue('--accent');
    el.mockButton.style.color = '#fff';
  });
  el.mockButton.addEventListener('mouseleave', ()=>{
    el.mockButton.style.background = '';
    el.mockButton.style.color = '';
  });
})();
</script>
{% endblock %}