//! Production CSS stylesheet with complete design tokens, responsive layout, and theme support.

use crate::theme::DesignTokens;

/// Compiles and returns the unified production CSS stylesheet.
pub fn generate_stylesheet() -> String {
    let mut css = String::with_capacity(16384);
    css.push_str(DesignTokens::css_variables());
    css.push_str(
        r#"
/* ── Universal Reset ─────────────────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  font-family: var(--font-sans);
  background-color: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--accent-text);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

/* ── Authentication & Login View ─────────────────────────────────────────────── */
#login-view {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-base);
  padding: 24px;
  box-sizing: border-box;
}

.login-card {
  width: 100%;
  max-width: 400px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-lg);
  box-sizing: border-box;
}

.login-header {
  text-align: center;
  margin-bottom: 24px;
}

.login-header .brand-mark {
  font-size: 14px;
  padding: 4px 10px;
  display: inline-block;
  margin-bottom: 12px;
}

.login-header h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

.login-header p {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.login-error {
  background-color: var(--status-fail-bg);
  color: var(--status-fail-text);
  border: 1px solid var(--status-fail-border);
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-size: 13px;
  margin-bottom: 16px;
  text-align: center;
}

/* ── App Shell Layout ────────────────────────────────────────────────────────── */
#app-layout {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.topbar {
  height: var(--topbar-height);
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.menu-toggle-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 6px 10px;
  cursor: pointer;
  font-size: 16px;
  min-height: 36px;
  min-width: 36px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.brand-mark {
  background: var(--accent-primary);
  color: #ffffff;
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  font-weight: 800;
  font-size: 12px;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.system-status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  border: 1px solid var(--status-pass-border);
  background: var(--status-pass-bg);
  color: var(--status-pass-text);
}

.ws-indicator {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  color: var(--text-muted);
}
.ws-indicator.connected {
  color: var(--status-pass-text);
}

.admin-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 500;
  background: var(--bg-elevated);
  padding: 4px 10px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

.theme-toggle-btn {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  padding: 6px 10px;
  cursor: pointer;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ── Sidebar & Navigation ────────────────────────────────────────────────────── */
.main-container {
  display: flex;
  flex: 1;
  min-height: calc(100vh - var(--topbar-height));
}

.sidebar {
  width: var(--sidebar-width);
  background-color: var(--bg-surface);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 20px 12px;
  overflow-y: auto;
  flex-shrink: 0;
}

.sidebar-section {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar-section-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  font-weight: 700;
  padding: 4px 10px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.nav-link:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
  text-decoration: none;
}

.nav-link.active {
  background-color: var(--bg-active);
  color: var(--text-primary);
  font-weight: 600;
  border-left: 3px solid var(--accent-primary);
}

.nav-icon {
  font-size: 14px;
  width: 18px;
  text-align: center;
}

.content-wrapper {
  flex: 1;
  padding: 28px 32px;
  overflow-y: auto;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
}

/* ── Page Header ─────────────────────────────────────────────────────────────── */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

.page-title-group h1 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.page-description {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.page-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ── Cards & Grid ────────────────────────────────────────────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}

.card-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}

.card-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.card-subtitle {
  font-size: 12px;
  color: var(--text-muted);
}

.card-stack {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.card-header-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-muted);
}

.card-header-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

/* ── Data Tables ─────────────────────────────────────────────────────────────── */
.table-wrapper {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
}

.table-toolbar {
  padding: 14px 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--border-subtle);
  flex-wrap: wrap;
}

.search-input {
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 6px 12px;
  color: var(--text-primary);
  font-size: 13px;
  min-width: 240px;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
}

table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  text-align: left;
}

table.data-table th {
  background-color: var(--bg-elevated);
  color: var(--text-secondary);
  font-weight: 600;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border-subtle);
  white-space: nowrap;
}

table.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-muted);
  color: var(--text-primary);
  vertical-align: middle;
}

table.data-table tr:last-child td {
  border-bottom: none;
}

table.data-table tr:hover td {
  background-color: var(--bg-hover);
}

/* ── Status Pills & Badges ───────────────────────────────────────────────────── */
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

.status-pass {
  background-color: var(--status-pass-bg);
  border: 1px solid var(--status-pass-border);
  color: var(--status-pass-text);
}

.status-warning {
  background-color: var(--status-warning-bg);
  border: 1px solid var(--status-warning-border);
  color: var(--status-warning-text);
}

.status-fail {
  background-color: var(--status-fail-bg);
  border: 1px solid var(--status-fail-border);
  color: var(--status-fail-text);
}

.status-info {
  background-color: var(--status-info-bg);
  border: 1px solid var(--status-info-border);
  color: var(--status-info-text);
}

.status-neutral {
  background-color: var(--status-neutral-bg);
  border: 1px solid var(--status-neutral-border);
  color: var(--status-neutral-text);
}

.key-code {
  font-family: var(--font-mono);
  font-size: 11px;
  background-color: var(--bg-elevated);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-muted);
}

/* ── Buttons & Controls ──────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 7px 14px;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  min-height: 36px;
  line-height: 1;
}

.btn-primary {
  background-color: var(--accent-primary);
  color: #ffffff;
}
.btn-primary:hover {
  background-color: var(--accent-hover);
}

.btn-secondary {
  background-color: var(--bg-elevated);
  border-color: var(--border-subtle);
  color: var(--text-primary);
}
.btn-secondary:hover {
  background-color: var(--bg-hover);
}

.btn-danger {
  background-color: var(--status-fail-bg);
  border-color: var(--status-fail-border);
  color: var(--status-fail-text);
}
.btn-danger:hover {
  background-color: var(--status-fail-border);
  color: #ffffff;
}

.btn-sm {
  padding: 4px 8px;
  font-size: 12px;
  min-height: 28px;
}

.btn-icon {
  padding: 6px;
  min-width: 32px;
  min-height: 32px;
}

/* ── Forms & Inputs ──────────────────────────────────────────────────────────── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

.form-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-input, .form-select, .form-textarea {
  padding: 8px 12px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 13px;
  font-family: inherit;
  width: 100%;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--border-accent);
  box-shadow: 0 0 0 3px rgba(56, 139, 253, 0.2);
}

.form-section {
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-muted);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 16px;
}

.form-section-header {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.form-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-help {
  font-size: 11px;
  color: var(--text-muted);
}

.alert-box {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 13px;
  margin-bottom: 16px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.alert-box.warning {
  background-color: var(--status-warning-bg);
  border: 1px solid var(--status-warning-border);
  color: var(--status-warning-text);
}

/* ── Modals & Sheets ─────────────────────────────────────────────────────────── */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--backdrop-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 16px;
  backdrop-filter: blur(2px);
}

.modal-sheet {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 640px;
  max-height: calc(100vh - 48px);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

.modal-close-btn {
  background: transparent;
  border: none;
  font-size: 18px;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px 8px;
}
.modal-close-btn:hover {
  color: var(--text-primary);
}

.modal-body {
  padding: 20px;
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  background-color: var(--bg-elevated);
}

/* ── QR Presentation ─────────────────────────────────────────────────────────── */
.qr-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background-color: #ffffff;
  border-radius: var(--radius-lg);
  margin: 16px 0;
  border: 1px solid var(--border-subtle);
  box-sizing: border-box;
  overflow: hidden;
}

.qr-target-box {
  width: 240px;
  height: 240px;
  max-width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.qr-target-box svg {
  width: 100%;
  height: 100%;
  max-width: 240px;
  max-height: 240px;
  display: block;
}

.qr-image {
  max-width: 240px;
  height: auto;
}

/* ── Responsive Adaptations ──────────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .sidebar {
    width: 210px;
  }
  .content-wrapper {
    padding: 20px;
  }
}

@media (max-width: 768px) {
  .menu-toggle-btn {
    display: block;
  }
  
  .sidebar {
    position: fixed;
    top: var(--topbar-height);
    left: 0;
    bottom: 0;
    width: 260px;
    z-index: 950;
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    box-shadow: var(--shadow-lg);
  }
  
  .sidebar.open {
    transform: translateX(0);
  }
  
  .mobile-overlay {
    display: none;
    position: fixed;
    top: var(--topbar-height);
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--backdrop-overlay);
    z-index: 900;
  }
  .mobile-overlay.active {
    display: block;
  }
  
  .content-wrapper {
    padding: 16px;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
  
  .form-grid-2 {
    grid-template-columns: 1fr;
  }
  
  .modal-sheet {
    max-width: calc(100vw - 20px);
    max-height: calc(100vh - 20px);
  }
  
  .page-header {
    flex-direction: column;
    align-items: stretch;
  }
  
  .table-toolbar {
    flex-direction: column;
    align-items: stretch;
  }
  
  .search-input {
    width: 100%;
  }
}
"#,
    );
    css
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_generate_stylesheet() {
        let css = generate_stylesheet();
        assert!(css.contains("--bg-base"));
        assert!(css.contains("--bg-surface"));
        assert!(css.contains("[data-theme=\"dark\"]"));
        assert!(css.contains("[data-theme=\"light\"]"));
        assert!(css.contains("@media (max-width: 768px)"));
    }
}