nkbmusic/admin/lib/cover_editor.dart

import 'package:flutter/material.dart';
import 'package:image_picker/image_picker.dart';

import 'api.dart';
import 'theme.dart';
import 'widgets.dart';

/// Cover photo for an album or song. Uploads and removes straight away (not on Save),
/// so the photo is live in the app as soon as it shows here.
class CoverEditor extends StatefulWidget {
  const CoverEditor({super.key, required this.table, required this.id, required this.coverUrl, this.hint});

  /// 'albums' or 'tracks'.
  final String table;
  final String id;
  final String? coverUrl;
  final String? hint;

  @override
  State<CoverEditor> createState() => _CoverEditorState();
}

class _CoverEditorState extends State<CoverEditor> {
  late String? _url = widget.coverUrl;
  bool _busy = false;

  Future<void> _pick() async {
    // Resized in the browser: covers show at most ~400 px wide in the app.
    final file = await ImagePicker().pickImage(source: ImageSource.gallery, maxWidth: 1200, maxHeight: 1200, imageQuality: 85);
    if (file == null) return;
    await _run(() async {
      final bytes = await file.readAsBytes();
      if (bytes.length > 5 << 20) throw 'That photo is too large. Please choose one under 5 MB.';
      final url = await AdminApi.setCover(widget.table, widget.id, bytes, file.mimeType ?? 'image/jpeg');
      setState(() => _url = url);
    }, 'Cover photo saved');
  }

  Future<void> _remove() => _run(() async {
        await AdminApi.removeCover(widget.table, widget.id);
        setState(() => _url = null);
      }, 'Cover photo removed');

  Future<void> _run(Future<void> Function() job, String done) async {
    setState(() => _busy = true);
    try {
      await job();
      if (mounted) showMessage(context, done);
    } catch (e) {
      if (mounted) showError(context, e);
    } finally {
      if (mounted) setState(() => _busy = false);
    }
  }

  @override
  Widget build(BuildContext context) => Row(
        children: [
          ClipRRect(
            borderRadius: BorderRadius.circular(10),
            child: SizedBox.square(
              dimension: 88,
              child: _busy
                  ? const Center(child: CircularProgressIndicator())
                  : _url == null
                      ? const ColoredBox(color: NkColors.surface, child: Icon(Icons.image_outlined, color: NkColors.muted, size: 36))
                      : Image.network(_url!, fit: BoxFit.cover),
            ),
          ),
          const SizedBox(width: 16),
          Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text('Cover photo', style: Theme.of(context).textTheme.titleMedium),
                Text(widget.hint ?? 'Square photos look best. JPG, PNG or WebP.',
                    style: const TextStyle(color: NkColors.muted)),
                const SizedBox(height: 8),
                Wrap(
                  spacing: 8,
                  children: [
                    OutlinedButton.icon(
                      onPressed: _busy ? null : _pick,
                      icon: const Icon(Icons.upload_outlined),
                      label: Text(_url == null ? 'Upload photo' : 'Change photo'),
                    ),
                    if (_url != null)
                      TextButton(onPressed: _busy ? null : _remove, child: const Text('Remove')),
                  ],
                ),
              ],
            ),
          ),
        ],
      );
}