import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';
import 'package:supabase_flutter/supabase_flutter.dart';

import '../../app/theme.dart';
import '../../core/env.dart';
import '../../data/catalog_repository.dart';
import '../profile/profile_screen.dart';

enum _Kind {
  claim('claim', 'This is my song', 'Credit me (or my family member) as the singer, writer or composer.'),
  takedown('takedown', 'Please remove this song', 'I am the artist, a family member or the rights holder.'),
  wrongInfo('wrong_info', 'The details are wrong', 'Title, singer, album or occasion needs correcting.'),
  other('other', 'Something else', 'Sound problem, offensive content or anything else.');

  const _Kind(this.id, this.title, this.subtitle);
  final String id;
  final String title;
  final String subtitle;
}

/// "Is this your song?" / report a problem. Goes to the admin team's queue.
class ReportScreen extends ConsumerStatefulWidget {
  const ReportScreen({super.key, this.trackId});

  final String? trackId;

  @override
  ConsumerState<ReportScreen> createState() => _ReportScreenState();
}

class _ReportScreenState extends ConsumerState<ReportScreen> {
  _Kind _kind = _Kind.claim;
  final _name = TextEditingController();
  final _contact = TextEditingController();
  final _song = TextEditingController();
  final _message = TextEditingController();
  bool _sending = false;
  bool _sent = false;

  @override
  void initState() {
    super.initState();
    if (!Env.hasSupabase) return;
    _contact.text = Supabase.instance.client.auth.currentUser?.email ?? '';
    ref.read(profileProvider.future).then((p) {
      if (mounted && p?.name != null && _name.text.isEmpty) setState(() => _name.text = p!.name!);
    }).ignore();
  }

  @override
  void dispose() {
    for (final c in [_name, _contact, _song, _message]) {
      c.dispose();
    }
    super.dispose();
  }

  bool get _valid =>
      _name.text.trim().isNotEmpty &&
      _contact.text.trim().length >= 6 &&
      _message.text.trim().length >= 5 &&
      (widget.trackId != null || _song.text.trim().isNotEmpty);

  Future<void> _send() async {
    setState(() => _sending = true);
    try {
      await Supabase.instance.client.from('takedown_requests').insert({
        'track_id': widget.trackId,
        'kind': _kind.id,
        'requester': _name.text.trim(),
        'contact': _contact.text.trim(),
        'reason': widget.trackId == null
            ? 'Song: ${_song.text.trim()}\n\n${_message.text.trim()}'
            : _message.text.trim(),
      });
      setState(() => _sent = true);
    } catch (_) {
      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text('Could not send. Check your connection, or email support@nkbmusic.com.')),
        );
      }
    } finally {
      if (mounted) setState(() => _sending = false);
    }
  }

  @override
  Widget build(BuildContext context) {
    final text = Theme.of(context).textTheme;
    final catalog = ref.watch(catalogProvider).value;
    final track = widget.trackId == null ? null : catalog?.trackById(widget.trackId!);

    if (_sent) {
      return Scaffold(
        appBar: AppBar(),
        body: Padding(
          padding: const EdgeInsets.all(24),
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              const Icon(Icons.favorite_rounded, color: NkColors.sun, size: 56),
              const SizedBox(height: 16),
              Text('Thank you', textAlign: TextAlign.center, style: text.headlineMedium),
              const SizedBox(height: 8),
              const Text(
                'We have received your message and will get back to you, usually within 7 days. '
                'Genuine removal requests are acted on as soon as we have checked them.',
                textAlign: TextAlign.center,
                style: TextStyle(color: NkColors.muted, height: 1.5),
              ),
              const SizedBox(height: 24),
              FilledButton(onPressed: () => context.pop(), child: const Text('Done')),
            ],
          ),
        ),
      );
    }

    return Scaffold(
      appBar: AppBar(title: const Text('Is this your song?')),
      body: ListView(
        padding: const EdgeInsets.fromLTRB(20, 0, 20, 32),
        children: [
          if (track != null)
            Text('About "${track.titleLatin}"', style: text.titleMedium?.copyWith(color: NkColors.sun)),
          const SizedBox(height: 8),
          const Text(
            'We want every artist credited properly. Tell us what is going on and our team will review it.',
            style: TextStyle(color: NkColors.muted, height: 1.5),
          ),
          const SizedBox(height: 12),
          RadioGroup<_Kind>(
            groupValue: _kind,
            onChanged: (k) => setState(() => _kind = k ?? _kind),
            child: Column(
              children: [
                for (final k in _Kind.values)
                  RadioListTile<_Kind>(
                    value: k,
                    contentPadding: EdgeInsets.zero,
                    title: Text(k.title, style: const TextStyle(fontWeight: FontWeight.w700)),
                    subtitle: Text(k.subtitle, style: const TextStyle(color: NkColors.muted)),
                  ),
              ],
            ),
          ),
          const SizedBox(height: 8),
          if (track == null) ...[
            TextField(
              controller: _song,
              onChanged: (_) => setState(() {}),
              decoration: const InputDecoration(labelText: 'Which song?', hintText: 'Song title and album'),
            ),
            const SizedBox(height: 12),
          ],
          TextField(
            controller: _name,
            textCapitalization: TextCapitalization.words,
            onChanged: (_) => setState(() {}),
            decoration: const InputDecoration(labelText: 'Your name'),
          ),
          const SizedBox(height: 12),
          TextField(
            controller: _contact,
            onChanged: (_) => setState(() {}),
            decoration: const InputDecoration(
              labelText: 'Email or WhatsApp number',
              helperText: 'Only our team sees this, to reply to you.',
            ),
          ),
          const SizedBox(height: 12),
          TextField(
            controller: _message,
            minLines: 4,
            maxLines: 8,
            onChanged: (_) => setState(() {}),
            decoration: const InputDecoration(
              labelText: 'Tell us more',
              hintText: 'For example: who sang it, who wrote it, the correct title, or why it should be removed.',
              alignLabelWithHint: true,
            ),
          ),
          const SizedBox(height: 20),
          FilledButton(
            onPressed: _valid && !_sending && Env.hasSupabase ? _send : null,
            child: _sending
                ? const SizedBox.square(dimension: 22, child: CircularProgressIndicator(strokeWidth: 2.5))
                : const Text('Send to the Nanga Kathai team'),
          ),
        ],
      ),
    );
  }
}