import 'package:flutter/material.dart';
import 'package:manager_app/Components/resource_picker.dart';
import 'package:manager_app/Screens/Resources/resource_formatting.dart';
import 'package:manager_app/app_context.dart';
import 'package:manager_app/constants.dart';
import 'package:manager_app/l10n/app_localizations.dart';

/// Dialogue d'ajout d'une ressource.
///
/// Un seul corps, pas deux onglets : « Local » / « En ligne » imposait une question
/// technique — où vivent les octets — avant que l'utilisateur ait rien choisi. Une
/// zone de dépôt, et dessous une ligne « ou coller une URL » qui se déplie.
///
/// Rend la liste des entrées choisies, ou `null` si le dialogue est annulé.
Future<List<PickedResource>?> showNewResource(
    AppContext appContext, BuildContext context) async {
  final picked = <PickedResource>[];

  return showDialog<List<PickedResource>>(
    context: context,
    builder: (BuildContext context) => _NewResourceDialog(picked: picked),
  );
}

class _NewResourceDialog extends StatefulWidget {
  final List<PickedResource> picked;
  const _NewResourceDialog({required this.picked});

  @override
  State<_NewResourceDialog> createState() => _NewResourceDialogState();
}

class _NewResourceDialogState extends State<_NewResourceDialog> {
  int get _totalBytes =>
      widget.picked.fold<int>(0, (sum, entry) => sum + entry.sizeBytes);

  @override
  Widget build(BuildContext context) {
    final l = AppLocalizations.of(context)!;

    return Dialog(
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(kRadiusShell),
        side: const BorderSide(color: kLine),
      ),
      clipBehavior: Clip.antiAlias,
      child: SizedBox(
        width: 560,
        child: Column(
          mainAxisSize: MainAxisSize.min,
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            _header(l),
            Flexible(
              child: SingleChildScrollView(
                padding: const EdgeInsets.fromLTRB(kSpace6, 0, kSpace6, kSpace4),
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.stretch,
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    ResourcePicker(
                      picked: widget.picked,
                      onChanged: () => setState(() {}),
                    ),
                    if (widget.picked.isNotEmpty) _totals(l),
                  ],
                ),
              ),
            ),
            _footer(l),
          ],
        ),
      ),
    );
  }

  Widget _header(AppLocalizations l) {
    return Padding(
      padding: const EdgeInsets.fromLTRB(kSpace6, kSpace5, kSpace4, kSpace4),
      child: Row(
        children: [
          Expanded(child: Text(l.mediaAddTitle, style: kTitleCard)),
          IconButton(
            icon: const Icon(Icons.close, size: 18, color: kInk3),
            splashRadius: 16,
            tooltip: l.close,
            onPressed: () => Navigator.of(context).pop(),
          ),
        ],
      ),
    );
  }

  Widget _totals(AppLocalizations l) {
    return Padding(
      padding: const EdgeInsets.only(top: kSpace4),
      child: Text(
        l.mediaSelectedTotal(widget.picked.length, formatBytes(context, _totalBytes)),
        style: kTextHint,
      ),
    );
  }

  Widget _footer(AppLocalizations l) {
    // Désactivé plutôt qu'expliqué : l'ancien dialogue acceptait le clic à vide,
    // puis affichait une notification orange « aucun fichier chargé ».
    final canAdd = widget.picked.isNotEmpty;

    return Container(
      padding: const EdgeInsets.all(kSpace4),
      decoration: const BoxDecoration(
        color: kSurface2,
        border: Border(top: BorderSide(color: kLineSoft)),
      ),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.end,
        children: [
          TextButton(
            onPressed: () => Navigator.of(context).pop(),
            child: Text(l.cancel,
                style: const TextStyle(fontSize: 13, color: kInk2)),
          ),
          const SizedBox(width: kSpace2),
          FilledButton(
            onPressed:
                canAdd ? () => Navigator.pop(context, widget.picked) : null,
            style: FilledButton.styleFrom(
              backgroundColor: kPrimaryColor,
              padding: const EdgeInsets.symmetric(
                  horizontal: kSpace5, vertical: kSpace3),
              shape: RoundedRectangleBorder(
                  borderRadius: BorderRadius.circular(kRadiusPill)),
            ),
            child: Text(l.mediaAddCount(widget.picked.length),
                style: const TextStyle(fontSize: 13, fontWeight: FontWeight.w600)),
          ),
        ],
      ),
    );
  }
}