import 'package:flutter/material.dart';
import '../unionflow_design_system.dart';

/// Header de page compact et moderne
/// 
/// Composant header minimaliste pour les pages principales du BottomNavigationBar.
/// Design épuré sans gradient lourd, optimisé pour l'espace.
/// 
/// Usage:
/// ```dart
/// UFPageHeader(
///   title: 'Membres',
///   icon: Icons.people,
///   actions: [
///     IconButton(icon: Icon(Icons.add), onPressed: () {}),
///   ],
/// )
/// ```
class UFPageHeader extends StatelessWidget {
  final String title;
  final IconData icon;
  final List<Widget>? actions;
  final Color? iconColor;
  final bool showDivider;

  const UFPageHeader({
    super.key,
    required this.title,
    required this.icon,
    this.actions,
    this.iconColor,
    this.showDivider = true,
  });

  @override
  Widget build(BuildContext context) {
    final effectiveIconColor = iconColor ?? ColorTokens.primary;

    return Column(
      children: [
        Padding(
          padding: const EdgeInsets.symmetric(
            horizontal: SpacingTokens.lg,
            vertical: SpacingTokens.md,
          ),
          child: Row(
            children: [
              // Icône
              Container(
                padding: const EdgeInsets.all(SpacingTokens.sm),
                decoration: BoxDecoration(
                  color: effectiveIconColor.withOpacity(0.1),
                  borderRadius: BorderRadius.circular(SpacingTokens.radiusMd),
                ),
                child: Icon(
                  icon,
                  color: effectiveIconColor,
                  size: 20,
                ),
              ),
              const SizedBox(width: SpacingTokens.md),
              
              // Titre
              Expanded(
                child: Text(
                  title,
                  style: TypographyTokens.titleLarge.copyWith(
                    color: ColorTokens.onSurface,
                    fontWeight: FontWeight.w600,
                  ),
                ),
              ),
              
              // Actions
              if (actions != null) ...actions!,
            ],
          ),
        ),
        
        // Divider optionnel
        if (showDivider)
          Divider(
            height: 1,
            thickness: 1,
            color: ColorTokens.outline.withOpacity(0.1),
          ),
      ],
    );
  }
}

/// Header de page avec statistiques
/// 
/// Header compact avec des métriques KPI intégrées.
/// 
/// Usage:
/// ```dart
/// UFPageHeaderWithStats(
///   title: 'Membres',
///   icon: Icons.people,
///   stats: [
///     UFHeaderStat(label: 'Total', value: '142'),
///     UFHeaderStat(label: 'Actifs', value: '128'),
///   ],
/// )
/// ```
class UFPageHeaderWithStats extends StatelessWidget {
  final String title;
  final IconData icon;
  final List<UFHeaderStat> stats;
  final List<Widget>? actions;
  final Color? iconColor;

  const UFPageHeaderWithStats({
    super.key,
    required this.title,
    required this.icon,
    required this.stats,
    this.actions,
    this.iconColor,
  });

  @override
  Widget build(BuildContext context) {
    final effectiveIconColor = iconColor ?? ColorTokens.primary;

    return Column(
      children: [
        // Titre et actions
        Padding(
          padding: const EdgeInsets.fromLTRB(
            SpacingTokens.lg,
            SpacingTokens.md,
            SpacingTokens.lg,
            SpacingTokens.sm,
          ),
          child: Row(
            children: [
              // Icône
              Container(
                padding: const EdgeInsets.all(SpacingTokens.sm),
                decoration: BoxDecoration(
                  color: effectiveIconColor.withOpacity(0.1),
                  borderRadius: BorderRadius.circular(SpacingTokens.radiusMd),
                ),
                child: Icon(
                  icon,
                  color: effectiveIconColor,
                  size: 20,
                ),
              ),
              const SizedBox(width: SpacingTokens.md),
              
              // Titre
              Expanded(
                child: Text(
                  title,
                  style: TypographyTokens.titleLarge.copyWith(
                    color: ColorTokens.onSurface,
                    fontWeight: FontWeight.w600,
                  ),
                ),
              ),
              
              // Actions
              if (actions != null) ...actions!,
            ],
          ),
        ),
        
        // Statistiques
        Padding(
          padding: const EdgeInsets.fromLTRB(
            SpacingTokens.lg,
            0,
            SpacingTokens.lg,
            SpacingTokens.md,
          ),
          child: Row(
            children: stats.map((stat) {
              final isLast = stat == stats.last;
              return Expanded(
                child: Padding(
                  padding: EdgeInsets.only(
                    right: isLast ? 0 : SpacingTokens.sm,
                  ),
                  child: _buildStatItem(stat),
                ),
              );
            }).toList(),
          ),
        ),
        
        // Divider
        Divider(
          height: 1,
          thickness: 1,
          color: ColorTokens.outline.withOpacity(0.1),
        ),
      ],
    );
  }

  Widget _buildStatItem(UFHeaderStat stat) {
    return UFContainer.rounded(
      padding: const EdgeInsets.symmetric(
        horizontal: SpacingTokens.md,
        vertical: SpacingTokens.sm,
      ),
      color: (stat.color ?? ColorTokens.primary).withOpacity(0.05),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Text(
            stat.value,
            style: TypographyTokens.titleMedium.copyWith(
              color: stat.color ?? ColorTokens.primary,
              fontWeight: FontWeight.bold,
            ),
          ),
          const SizedBox(height: SpacingTokens.xs),
          Text(
            stat.label,
            style: TypographyTokens.labelSmall.copyWith(
              color: ColorTokens.onSurfaceVariant,
            ),
            maxLines: 1,
            overflow: TextOverflow.ellipsis,
          ),
        ],
      ),
    );
  }
}

/// Statistique pour UFPageHeaderWithStats
class UFHeaderStat {
  final String label;
  final String value;
  final Color? color;

  const UFHeaderStat({
    required this.label,
    required this.value,
    this.color,
  });
}