import 'package:flutter/material.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:trainhub_flutter/core/constants/ui_constants.dart';
import 'package:trainhub_flutter/core/theme/app_colors.dart';
import 'package:trainhub_flutter/domain/entities/program_workout.dart';

class RecentActivitySection extends StatelessWidget {
  const RecentActivitySection({super.key, required this.activity});

  final List<ProgramWorkoutEntity> activity;

  @override
  Widget build(BuildContext context) {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Row(
          children: [
            Expanded(
              child: Text(
                'Recent Activity',
                style: GoogleFonts.inter(
                  fontSize: 16,
                  fontWeight: FontWeight.w600,
                  color: AppColors.textPrimary,
                ),
              ),
            ),
            if (activity.isNotEmpty)
              Text(
                '${activity.length} workout${activity.length == 1 ? '' : 's'}',
                style: GoogleFonts.inter(
                  fontSize: 12,
                  color: AppColors.textMuted,
                ),
              ),
          ],
        ),
        const SizedBox(height: UIConstants.spacing12),
        if (activity.isEmpty)
          const _EmptyActivity()
        else
          _ActivityList(activity: activity),
      ],
    );
  }
}

class _EmptyActivity extends StatelessWidget {
  const _EmptyActivity();

  @override
  Widget build(BuildContext context) {
    return Container(
      width: double.infinity,
      padding: const EdgeInsets.symmetric(
        vertical: 40,
        horizontal: UIConstants.spacing24,
      ),
      decoration: BoxDecoration(
        color: AppColors.surfaceContainer,
        borderRadius: UIConstants.cardBorderRadius,
        border: Border.all(color: AppColors.border),
      ),
      child: Column(
        children: [
          const Icon(Icons.history, size: 32, color: AppColors.textMuted),
          const SizedBox(height: UIConstants.spacing12),
          Text(
            'No completed workouts yet',
            style: GoogleFonts.inter(
              fontSize: 14,
              fontWeight: FontWeight.w500,
              color: AppColors.textSecondary,
            ),
          ),
          const SizedBox(height: UIConstants.spacing4),
          Text(
            'Your recent workout history will appear here.',
            style: GoogleFonts.inter(
              fontSize: 13,
              color: AppColors.textMuted,
            ),
          ),
        ],
      ),
    );
  }
}

class _ActivityList extends StatelessWidget {
  const _ActivityList({required this.activity});

  final List<ProgramWorkoutEntity> activity;

  @override
  Widget build(BuildContext context) {
    return Container(
      decoration: BoxDecoration(
        color: AppColors.surfaceContainer,
        borderRadius: UIConstants.cardBorderRadius,
        border: Border.all(color: AppColors.border),
      ),
      child: ClipRRect(
        borderRadius: UIConstants.cardBorderRadius,
        child: Column(
          children: [
            for (int i = 0; i < activity.length; i++) ...[
              if (i > 0)
                const Divider(
                  height: 1,
                  thickness: 1,
                  color: AppColors.border,
                ),
              _ActivityItem(workout: activity[i]),
            ],
          ],
        ),
      ),
    );
  }
}

class _ActivityItem extends StatefulWidget {
  const _ActivityItem({required this.workout});

  final ProgramWorkoutEntity workout;

  @override
  State<_ActivityItem> createState() => _ActivityItemState();
}

class _ActivityItemState extends State<_ActivityItem> {
  bool _isHovered = false;

  Color get _typeColor {
    switch (widget.workout.type.toLowerCase()) {
      case 'strength':
        return AppColors.accent;
      case 'cardio':
        return AppColors.info;
      case 'flexibility':
      case 'mobility':
        return AppColors.purple;
      case 'rest':
        return AppColors.textMuted;
      default:
        return AppColors.success;
    }
  }

  IconData get _typeIcon {
    switch (widget.workout.type.toLowerCase()) {
      case 'strength':
        return Icons.fitness_center;
      case 'cardio':
        return Icons.directions_run;
      case 'flexibility':
      case 'mobility':
        return Icons.self_improvement;
      case 'rest':
        return Icons.bedtime_outlined;
      default:
        return Icons.check_circle;
    }
  }

  @override
  Widget build(BuildContext context) {
    return MouseRegion(
      onEnter: (_) => setState(() => _isHovered = true),
      onExit: (_) => setState(() => _isHovered = false),
      child: AnimatedContainer(
        duration: UIConstants.animationDuration,
        color: _isHovered
            ? AppColors.surfaceContainerHigh.withValues(alpha: 0.5)
            : Colors.transparent,
        padding: const EdgeInsets.symmetric(
          horizontal: UIConstants.cardPadding,
          vertical: UIConstants.spacing12,
        ),
        child: Row(
          children: [
            _buildLeadingIcon(),
            const SizedBox(width: UIConstants.spacing12),
            _buildWorkoutInfo(),
            _buildTypeBadge(),
            const SizedBox(width: UIConstants.spacing12),
            _buildStatusIcon(),
          ],
        ),
      ),
    );
  }

  Widget _buildLeadingIcon() {
    return Container(
      width: 36,
      height: 36,
      decoration: BoxDecoration(
        color: widget.workout.completed
            ? _typeColor.withValues(alpha: 0.15)
            : AppColors.zinc800,
        borderRadius: UIConstants.smallCardBorderRadius,
      ),
      child: Icon(
        widget.workout.completed ? _typeIcon : Icons.circle_outlined,
        size: 18,
        color: widget.workout.completed ? _typeColor : AppColors.textMuted,
      ),
    );
  }

  Widget _buildWorkoutInfo() {
    return Expanded(
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Text(
            widget.workout.name ?? 'Workout',
            style: GoogleFonts.inter(
              fontSize: 14,
              fontWeight: FontWeight.w500,
              color: AppColors.textPrimary,
            ),
          ),
          const SizedBox(height: 2),
          Text(
            'Week ${widget.workout.weekId}  ·  Day ${widget.workout.day}',
            style: GoogleFonts.inter(
              fontSize: 12,
              color: AppColors.textMuted,
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildTypeBadge() {
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
      decoration: BoxDecoration(
        color: _typeColor.withValues(alpha: 0.12),
        borderRadius: BorderRadius.circular(6),
      ),
      child: Text(
        widget.workout.type,
        style: GoogleFonts.inter(
          fontSize: 11,
          fontWeight: FontWeight.w500,
          color: _typeColor,
        ),
      ),
    );
  }

  Widget _buildStatusIcon() {
    if (widget.workout.completed) {
      return const Icon(
        Icons.check_circle,
        size: 18,
        color: AppColors.success,
      );
    }
    return const Icon(
      Icons.radio_button_unchecked,
      size: 18,
      color: AppColors.textMuted,
    );
  }
}