import 'package:flutter/material.dart';
import '../../../../shared/theme/app_theme.dart';
import '../../../../shared/theme/design_system.dart';

/// Card statistique professionnelle avec design basé sur le nombre d'or
class DashboardStatCard extends StatefulWidget {
  const DashboardStatCard({
    super.key,
    required this.title,
    required this.value,
    required this.icon,
    required this.color,
    this.trend,
    this.subtitle,
    this.onTap,
    this.isLoading = false,
  });

  final String title;
  final String value;
  final IconData icon;
  final Color color;
  final String? trend;
  final String? subtitle;
  final VoidCallback? onTap;
  final bool isLoading;

  @override
  State<DashboardStatCard> createState() => _DashboardStatCardState();
}

class _DashboardStatCardState extends State<DashboardStatCard>
    with SingleTickerProviderStateMixin {
  late AnimationController _animationController;
  late Animation<double> _scaleAnimation;
  late Animation<double> _fadeAnimation;
  bool _isHovered = false;

  @override
  void initState() {
    super.initState();
    _animationController = AnimationController(
      duration: DesignSystem.animationMedium,
      vsync: this,
    );

    _scaleAnimation = Tween<double>(
      begin: 0.0,
      end: 1.0,
    ).animate(CurvedAnimation(
      parent: _animationController,
      curve: DesignSystem.animationCurveEnter,
    ));

    _fadeAnimation = Tween<double>(
      begin: 0.0,
      end: 1.0,
    ).animate(CurvedAnimation(
      parent: _animationController,
      curve: DesignSystem.animationCurve,
    ));

    _animationController.forward();
  }

  @override
  void dispose() {
    _animationController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return AnimatedBuilder(
      animation: _animationController,
      builder: (context, child) {
        return Transform.scale(
          scale: _scaleAnimation.value,
          child: FadeTransition(
            opacity: _fadeAnimation,
            child: _buildCard(context),
          ),
        );
      },
    );
  }

  Widget _buildCard(BuildContext context) {
    return MouseRegion(
      onEnter: (_) => _setHovered(true),
      onExit: (_) => _setHovered(false),
      child: GestureDetector(
        onTap: widget.onTap,
        child: AnimatedContainer(
          duration: DesignSystem.animationFast,
          curve: DesignSystem.animationCurve,
          padding: EdgeInsets.all(DesignSystem.spacingLg),
          decoration: BoxDecoration(
            color: AppTheme.surfaceLight,
            borderRadius: BorderRadius.circular(DesignSystem.radiusLg),
            boxShadow: _isHovered ? DesignSystem.shadowCardHover : DesignSystem.shadowCard,
            border: Border.all(
              color: widget.color.withOpacity(0.1),
              width: 1,
            ),
          ),
          child: widget.isLoading ? _buildLoadingState() : _buildContent(),
        ),
      ),
    );
  }

  Widget _buildLoadingState() {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Row(
          mainAxisAlignment: MainAxisAlignment.spaceBetween,
          children: [
            _buildShimmer(40, 40, isCircular: true),
            if (widget.trend != null) _buildShimmer(60, 24, radius: 12),
          ],
        ),
        SizedBox(height: DesignSystem.spacingMd),
        _buildShimmer(80, 32),
        SizedBox(height: DesignSystem.spacingSm),
        _buildShimmer(120, 16),
        if (widget.subtitle != null) ...[
          SizedBox(height: DesignSystem.spacingXs),
          _buildShimmer(100, 14),
        ],
      ],
    );
  }

  Widget _buildShimmer(double width, double height, {double? radius, bool isCircular = false}) {
    return Container(
      width: width,
      height: height,
      decoration: BoxDecoration(
        color: AppTheme.textHint.withOpacity(0.1),
        borderRadius: isCircular
          ? BorderRadius.circular(height / 2)
          : BorderRadius.circular(radius ?? DesignSystem.radiusSm),
      ),
    );
  }

  Widget _buildContent() {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        _buildHeader(),
        SizedBox(height: DesignSystem.goldenHeight(DesignSystem.spacingLg)),
        _buildValue(),
        SizedBox(height: DesignSystem.spacingSm),
        _buildTitle(),
        if (widget.subtitle != null) ...[
          SizedBox(height: DesignSystem.spacingXs),
          _buildSubtitle(),
        ],
      ],
    );
  }

  Widget _buildHeader() {
    return Row(
      mainAxisAlignment: MainAxisAlignment.spaceBetween,
      children: [
        _buildIconContainer(),
        if (widget.trend != null) _buildTrendBadge(),
      ],
    );
  }

  Widget _buildIconContainer() {
    return Container(
      width: DesignSystem.goldenWidth(32),
      height: 32,
      decoration: BoxDecoration(
        gradient: LinearGradient(
          begin: Alignment.topLeft,
          end: Alignment.bottomRight,
          colors: [
            widget.color.withOpacity(0.15),
            widget.color.withOpacity(0.05),
          ],
        ),
        borderRadius: BorderRadius.circular(DesignSystem.radiusMd),
        border: Border.all(
          color: widget.color.withOpacity(0.2),
          width: 1,
        ),
      ),
      child: Icon(
        widget.icon,
        color: widget.color,
        size: 20,
      ),
    );
  }

  Widget _buildTrendBadge() {
    return Container(
      padding: EdgeInsets.symmetric(
        horizontal: DesignSystem.spacingSm,
        vertical: DesignSystem.spacingXs,
      ),
      decoration: BoxDecoration(
        color: _getTrendColor().withOpacity(0.1),
        borderRadius: BorderRadius.circular(DesignSystem.radiusXl),
        border: Border.all(
          color: _getTrendColor().withOpacity(0.2),
          width: 1,
        ),
      ),
      child: Row(
        mainAxisSize: MainAxisSize.min,
        children: [
          Icon(
            _getTrendIcon(),
            color: _getTrendColor(),
            size: 14,
          ),
          SizedBox(width: DesignSystem.spacing2xs),
          Text(
            widget.trend!,
            style: DesignSystem.labelSmall.copyWith(
              color: _getTrendColor(),
              fontWeight: FontWeight.w600,
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildValue() {
    return Text(
      widget.value,
      style: DesignSystem.displayMedium.copyWith(
        color: widget.color,
        fontWeight: FontWeight.w800,
        fontSize: 28,
      ),
    );
  }

  Widget _buildTitle() {
    return Text(
      widget.title,
      style: DesignSystem.labelLarge.copyWith(
        color: AppTheme.textSecondary,
        fontWeight: FontWeight.w500,
      ),
    );
  }

  Widget _buildSubtitle() {
    return Text(
      widget.subtitle!,
      style: DesignSystem.labelMedium.copyWith(
        color: AppTheme.textHint,
      ),
    );
  }

  void _setHovered(bool hovered) {
    if (mounted) {
      setState(() {
        _isHovered = hovered;
      });
    }
  }

  Color _getTrendColor() {
    if (widget.trend == null) return AppTheme.textSecondary;

    if (widget.trend!.startsWith('+')) {
      return AppTheme.successColor;
    } else if (widget.trend!.startsWith('-')) {
      return AppTheme.errorColor;
    } else {
      return AppTheme.warningColor;
    }
  }

  IconData _getTrendIcon() {
    if (widget.trend == null) return Icons.trending_flat;

    if (widget.trend!.startsWith('+')) {
      return Icons.trending_up;
    } else if (widget.trend!.startsWith('-')) {
      return Icons.trending_down;
    } else {
      return Icons.trending_flat;
    }
  }
}