import 'package:flutter/material.dart';
import 'package:shimmer/shimmer.dart';
import '../theme.dart';

class SkeletonBox extends StatelessWidget {
  final double? width;
  final double height;
  final double radius;

  const SkeletonBox({
    super.key,
    this.width,
    required this.height,
    this.radius = 6,
  });

  @override
  Widget build(BuildContext context) {
    return Container(
      width: width,
      height: height,
      decoration: BoxDecoration(
        color: Colors.white,
        borderRadius: BorderRadius.circular(radius),
      ),
    );
  }
}

class SkeletonShimmer extends StatelessWidget {
  final Widget child;

  const SkeletonShimmer({super.key, required this.child});

  @override
  Widget build(BuildContext context) {
    final base = AppColors.isDark
        ? const Color(0xFF334155)
        : const Color(0xFFE2E8F0);
    final highlight = AppColors.isDark
        ? const Color(0xFF475569)
        : const Color(0xFFF1F5F9);
    return Shimmer.fromColors(
      baseColor: base,
      highlightColor: highlight,
      period: const Duration(milliseconds: 1400),
      child: child,
    );
  }
}

class EventCardSkeleton extends StatelessWidget {
  const EventCardSkeleton({super.key});

  @override
  Widget build(BuildContext context) {
    return Container(
      margin: const EdgeInsets.only(bottom: 12),
      decoration: BoxDecoration(
        color: AppColors.surface,
        borderRadius: BorderRadius.circular(16),
        boxShadow: [
          BoxShadow(
            color: Colors.black.withOpacity(0.03),
            blurRadius: 10,
            offset: const Offset(0, 2),
          ),
        ],
      ),
      child: SkeletonShimmer(
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Padding(
              padding: const EdgeInsets.all(16),
              child: Row(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  const SkeletonBox(width: 44, height: 44, radius: 12),
                  const SizedBox(width: 12),
                  Expanded(
                    child: Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [
                        Row(
                          children: const [
                            Expanded(child: SkeletonBox(height: 16, radius: 6)),
                            SizedBox(width: 8),
                            SkeletonBox(width: 48, height: 18, radius: 10),
                          ],
                        ),
                        const SizedBox(height: 10),
                        const SkeletonBox(height: 12, radius: 4),
                        const SizedBox(height: 6),
                        const SkeletonBox(width: 180, height: 12, radius: 4),
                      ],
                    ),
                  ),
                ],
              ),
            ),
            Padding(
              padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
              child: Row(
                children: const [
                  SkeletonBox(width: 160, height: 12, radius: 4),
                ],
              ),
            ),
          ],
        ),
      ),
    );
  }
}

class WorkOrderCardSkeleton extends StatelessWidget {
  const WorkOrderCardSkeleton({super.key});

  @override
  Widget build(BuildContext context) {
    return Container(
      margin: const EdgeInsets.only(bottom: 12),
      padding: const EdgeInsets.all(16),
      decoration: BoxDecoration(
        color: AppColors.surface,
        borderRadius: BorderRadius.circular(16),
        boxShadow: [
          BoxShadow(
            color: Colors.black.withOpacity(0.03),
            blurRadius: 10,
            offset: const Offset(0, 2),
          ),
        ],
      ),
      child: SkeletonShimmer(
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Row(
              children: const [
                Expanded(child: SkeletonBox(height: 16, radius: 6)),
                SizedBox(width: 8),
                SkeletonBox(width: 56, height: 18, radius: 10),
              ],
            ),
            const SizedBox(height: 12),
            const SkeletonBox(height: 12, radius: 4),
            const SizedBox(height: 6),
            const SkeletonBox(width: 220, height: 12, radius: 4),
            const SizedBox(height: 14),
            Row(
              children: const [
                SkeletonBox(width: 80, height: 12, radius: 4),
                SizedBox(width: 12),
                SkeletonBox(width: 100, height: 12, radius: 4),
                Spacer(),
                SkeletonBox(width: 36, height: 16, radius: 4),
              ],
            ),
          ],
        ),
      ),
    );
  }
}

class OrderCardSkeleton extends StatelessWidget {
  const OrderCardSkeleton({super.key});

  @override
  Widget build(BuildContext context) {
    return Container(
      margin: const EdgeInsets.only(bottom: 12),
      padding: const EdgeInsets.all(16),
      decoration: BoxDecoration(
        color: AppColors.surface,
        borderRadius: BorderRadius.circular(16),
        boxShadow: [
          BoxShadow(
            color: Colors.black.withOpacity(0.03),
            blurRadius: 10,
            offset: const Offset(0, 2),
          ),
        ],
      ),
      child: SkeletonShimmer(
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Row(
              children: const [
                SkeletonBox(width: 140, height: 14, radius: 4),
                Spacer(),
                SkeletonBox(width: 56, height: 18, radius: 10),
              ],
            ),
            const SizedBox(height: 14),
            const SkeletonBox(height: 15, width: 200, radius: 4),
            const SizedBox(height: 10),
            Row(
              children: const [
                SkeletonBox(width: 90, height: 12, radius: 4),
                SizedBox(width: 16),
                SkeletonBox(width: 50, height: 12, radius: 4),
              ],
            ),
            const SizedBox(height: 14),
            Row(
              children: const [
                SkeletonBox(width: 100, height: 12, radius: 4),
                Spacer(),
                SkeletonBox(width: 70, height: 16, radius: 4),
              ],
            ),
          ],
        ),
      ),
    );
  }
}

class DetailPageSkeleton extends StatelessWidget {
  const DetailPageSkeleton({super.key});

  @override
  Widget build(BuildContext context) {
    return SkeletonShimmer(
      child: SingleChildScrollView(
        padding: const EdgeInsets.all(20),
        physics: const NeverScrollableScrollPhysics(),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Container(
              padding: const EdgeInsets.all(20),
              decoration: BoxDecoration(
                color: AppColors.surface,
                borderRadius: BorderRadius.circular(16),
              ),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: const [
                  SkeletonBox(width: 100, height: 14, radius: 4),
                  SizedBox(height: 12),
                  SkeletonBox(height: 22, radius: 6),
                  SizedBox(height: 10),
                  SkeletonBox(width: 220, height: 14, radius: 4),
                ],
              ),
            ),
            const SizedBox(height: 20),
            _block(height: 130),
            const SizedBox(height: 20),
            _block(height: 130),
            const SizedBox(height: 20),
            _block(height: 100),
          ],
        ),
      ),
    );
  }

  Widget _block({required double height}) {
    return Container(
      width: double.infinity,
      height: height,
      decoration: BoxDecoration(
        color: AppColors.surface,
        borderRadius: BorderRadius.circular(16),
      ),
      child: Padding(
        padding: const EdgeInsets.all(20),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: const [
            SkeletonBox(width: 80, height: 14, radius: 4),
            SizedBox(height: 14),
            SkeletonBox(height: 14, radius: 4),
            SizedBox(height: 8),
            SkeletonBox(width: 200, height: 14, radius: 4),
          ],
        ),
      ),
    );
  }
}

class SkeletonList extends StatelessWidget {
  final WidgetBuilder itemBuilder;
  final int count;
  final EdgeInsetsGeometry padding;

  const SkeletonList({
    super.key,
    required this.itemBuilder,
    this.count = 5,
    this.padding = const EdgeInsets.all(16),
  });

  @override
  Widget build(BuildContext context) {
    return ListView.builder(
      padding: padding,
      itemCount: count,
      physics: const NeverScrollableScrollPhysics(),
      itemBuilder: (context, _) => itemBuilder(context),
    );
  }
}