import 'dart:io';
import 'dart:typed_data';

import 'package:flutter/foundation.dart' show kIsWeb;
import 'package:flutter/material.dart';

import 'hover_relief_widget.dart';

/// Cadre « croquis » par-dessus la photo (même ressource que les cartes enfant).
const String kRegistrationPhotoFrameAsset = 'assets/images/photo_frame.png';

/// Indique si une photo « réelle » est présente (hors seul placeholder asset).
bool registrationPhotoSlotHasImage({
  Uint8List? imageBytes,
  File? imageFile,
  String? imagePathOrAsset,
}) {
  if (imageBytes != null && imageBytes.isNotEmpty) return true;
  if (imageFile != null) return true;
  if (imagePathOrAsset == null || imagePathOrAsset.isEmpty) return false;
  return !imagePathOrAsset.startsWith('assets/');
}

/// Zone photo uniforme : cadre gris / placeholder, tap pour choisir, croix pour retirer, cadre dessin si photo.
///
/// Utilisé inscription **enfants** ([ChildCardWidget]) et **AM** ([ProfessionalInfoFormScreen]).
class RegistrationPhotoSlot extends StatelessWidget {
  final double side;
  final double scaleFactor;
  final Uint8List? imageBytes;
  final File? imageFile;
  /// Chemin fichier local (hors `assets/`) ou URI asset `assets/...`.
  final String? imagePathOrAsset;
  final VoidCallback? onTapPick;
  final VoidCallback? onClear;
  final Color baseShadowColor;
  final String placeholderAsset;
  final bool isMobile;

  const RegistrationPhotoSlot({
    super.key,
    required this.side,
    this.scaleFactor = 1.0,
    this.imageBytes,
    this.imageFile,
    this.imagePathOrAsset,
    this.onTapPick,
    this.onClear,
    required this.baseShadowColor,
    this.placeholderAsset = 'assets/images/photo.png',
    this.isMobile = false,
  });

  bool get _hasImage => registrationPhotoSlotHasImage(
        imageBytes: imageBytes,
        imageFile: imageFile,
        imagePathOrAsset: imagePathOrAsset,
      );

  Widget _buildImage({required BoxFit fit}) {
    final b = imageBytes;
    if (b != null && b.isNotEmpty) {
      return Image.memory(b, fit: fit);
    }
    final f = imageFile;
    if (f != null) {
      return kIsWeb ? Image.network(f.path, fit: fit) : Image.file(f, fit: fit);
    }
    final p = imagePathOrAsset;
    if (p != null && p.isNotEmpty) {
      if (p.startsWith('assets/')) {
        return Image.asset(p, fit: fit);
      }
      if (!kIsWeb) {
        try {
          final file = File(p);
          if (file.existsSync()) {
            return Image.file(file, fit: fit);
          }
        } catch (_) {}
      }
    }
    return Image.asset(placeholderAsset, fit: BoxFit.contain);
  }

  @override
  Widget build(BuildContext context) {
    final canPick = onTapPick != null;
    final canClear = onClear != null && _hasImage;
    final outerRadius = BorderRadius.circular(10 * scaleFactor);
    final photoClipRadius = BorderRadius.circular(side * 0.14);
    final initialPhotoShadow =
        Color.alphaBlend(Colors.black.withOpacity(0.22), baseShadowColor);
    final hoverPhotoShadow =
        Color.alphaBlend(Colors.black.withOpacity(0.32), baseShadowColor);

    return Stack(
      clipBehavior: Clip.none,
      alignment: Alignment.center,
      children: [
        HoverReliefWidget(
          onPressed: canPick ? onTapPick : null,
          borderRadius: outerRadius,
          initialElevation: 10,
          hoverElevation: 16,
          initialShadowColor: initialPhotoShadow,
          hoverShadowColor: hoverPhotoShadow,
          clipBehavior: _hasImage ? Clip.none : Clip.antiAlias,
          child: SizedBox(
            width: side,
            height: side,
            child: !_hasImage
                ? ClipRRect(
                    borderRadius: outerRadius,
                    child: Center(
                      child: Image.asset(
                        placeholderAsset,
                        fit: BoxFit.contain,
                        width: side,
                        height: side,
                      ),
                    ),
                  )
                : Stack(
                    fit: StackFit.expand,
                    children: [
                      Positioned.fill(
                        child: ClipRRect(
                          borderRadius: photoClipRadius,
                          child: _buildImage(fit: BoxFit.cover),
                        ),
                      ),
                      Positioned.fill(
                        child: Image.asset(
                          kRegistrationPhotoFrameAsset,
                          fit: BoxFit.fill,
                          errorBuilder: (context, error, stackTrace) =>
                              const SizedBox.shrink(),
                        ),
                      ),
                    ],
                  ),
          ),
        ),
        if (canClear)
          Positioned(
            top: 8 * scaleFactor,
            right: 8 * scaleFactor,
            child: Material(
              color: Colors.transparent,
              child: InkWell(
                onTap: onClear,
                customBorder: const CircleBorder(),
                child: Padding(
                  padding: const EdgeInsets.all(4),
                  child: Image.asset(
                    'assets/images/cross.png',
                    width: isMobile ? 26 : 30,
                    height: isMobile ? 26 : 30,
                    fit: BoxFit.contain,
                  ),
                ),
              ),
            ),
          ),
      ],
    );
  }
}