import 'package:flutter/material.dart';
import 'package:hooks_riverpod/hooks_riverpod.dart';
import 'package:lucide_icons_flutter/lucide_icons.dart';

import '../../shared/l10n/l10n.dart';
import '../../shared/theme/theme.dart';
import '../../shared/widgets/buzz_loading_indicator.dart';
import '../../shared/widgets/modal_presentation.dart';
import '../pairing/pairing_page.dart';
import 'invite_join_provider.dart';

Future<void> showInviteJoinSheet(BuildContext context, WidgetRef ref) {
  return showBuzzModalBottomSheet<void>(
    context: context,
    isScrollControlled: true,
    showDragHandle: true,
    builder: (_) => const InviteJoinSheet(),
  );
}

class InviteJoinSheet extends ConsumerWidget {
  const InviteJoinSheet({super.key});

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final state = ref.watch(inviteJoinProvider);
    final isClaiming = state.status == InviteJoinStatus.claiming;
    final host = state.host ?? context.l10n.unknownHost;
    final derivedName = state.communityName;

    if (state.status == InviteJoinStatus.success) {
      return _InviteJoinSuccess(host: host, communityName: derivedName);
    }

    return SafeArea(
      child: Padding(
        padding: const EdgeInsets.fromLTRB(Grid.sm, 0, Grid.sm, Grid.sm),
        child: Column(
          mainAxisSize: MainAxisSize.min,
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            Icon(LucideIcons.userPlus, size: 40, color: context.colors.primary),
            const SizedBox(height: Grid.sm),
            Text(
              context.l10n.inviteJoinTitle,
              style: context.textTheme.titleLarge,
            ),
            const SizedBox(height: Grid.xxs),
            Text(
              context.l10n.inviteJoinHostPrompt,
              style: context.textTheme.bodyMedium?.copyWith(
                color: context.colors.onSurfaceVariant,
              ),
            ),
            const SizedBox(height: Grid.xs),
            Container(
              padding: const EdgeInsets.all(Grid.twelve),
              decoration: BoxDecoration(
                color: context.colors.surfaceContainerHighest.withValues(
                  alpha: 0.7,
                ),
                borderRadius: BorderRadius.circular(12),
                border: Border.all(color: context.colors.outlineVariant),
              ),
              child: Text(
                host,
                style: context.textTheme.titleMedium?.copyWith(
                  fontFamily: 'GeistMono',
                  fontWeight: FontWeight.w700,
                ),
              ),
            ),
            if (derivedName != null && derivedName != host) ...[
              const SizedBox(height: Grid.xxs),
              Text(
                context.l10n.inviteDisplayName(derivedName),
                style: context.textTheme.bodySmall?.copyWith(
                  color: context.colors.onSurfaceVariant,
                ),
              ),
            ],
            const SizedBox(height: Grid.sm),
            Text(
              context.l10n.inviteIdentityWarning,
              style: context.textTheme.bodyMedium?.copyWith(
                color: context.colors.onSurfaceVariant,
              ),
            ),
            if (state.status == InviteJoinStatus.error &&
                state.errorMessage != null) ...[
              const SizedBox(height: Grid.sm),
              Text(
                _localizedInviteError(context, state.errorMessage!),
                style: context.textTheme.bodySmall?.copyWith(
                  color: context.colors.error,
                ),
              ),
            ],
            const SizedBox(height: Grid.lg),
            Row(
              children: [
                Expanded(
                  child: OutlinedButton(
                    onPressed: isClaiming
                        ? null
                        : () => Navigator.of(context).pop(),
                    child: Text(context.l10n.cancel),
                  ),
                ),
                const SizedBox(width: Grid.sm),
                Expanded(
                  child: FilledButton.icon(
                    onPressed: isClaiming || state.requiresFreshInvite
                        ? null
                        : () => ref
                              .read(inviteJoinProvider.notifier)
                              .confirmJoin(),
                    icon: isClaiming
                        ? SizedBox(
                            width: 16,
                            height: 16,
                            child: BuzzLoadingIndicator(
                              size: 16,
                              semanticLabel: context.l10n.inviteJoiningCommunity,
                            ),
                          )
                        : const Icon(LucideIcons.check),
                    label: Text(
                      isClaiming ? context.l10n.joining : context.l10n.join,
                    ),
                  ),
                ),
              ],
            ),
          ],
        ),
      ),
    );
  }
}

class _InviteJoinSuccess extends StatelessWidget {
  final String host;
  final String? communityName;

  const _InviteJoinSuccess({required this.host, this.communityName});

  @override
  Widget build(BuildContext context) {
    return SafeArea(
      child: Padding(
        padding: const EdgeInsets.fromLTRB(Grid.sm, 0, Grid.sm, Grid.sm),
        child: Column(
          mainAxisSize: MainAxisSize.min,
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            Icon(
              LucideIcons.circleCheck,
              size: 40,
              color: context.colors.primary,
            ),
            const SizedBox(height: Grid.sm),
            Text(
              context.l10n.inviteJoined(communityName ?? host),
              style: context.textTheme.titleLarge,
            ),
            const SizedBox(height: Grid.xs),
            Text(
              context.l10n.inviteIdentityWarning,
              style: context.textTheme.bodyMedium?.copyWith(
                color: context.colors.onSurfaceVariant,
              ),
            ),
            const SizedBox(height: Grid.lg),
            FilledButton.icon(
              onPressed: () {
                Navigator.of(context).pop();
                Navigator.of(context).push(
                  MaterialPageRoute<void>(
                    builder: (_) => const PairingPage(addingCommunity: true),
                  ),
                );
              },
              icon: const Icon(LucideIcons.scanLine),
              label: Text(context.l10n.inviteBackupNow),
            ),
            const SizedBox(height: Grid.xs),
            TextButton(
              onPressed: () => Navigator.of(context).pop(),
              child: Text(context.l10n.inviteNotNow),
            ),
          ],
        ),
      ),
    );
  }
}

String _localizedInviteError(BuildContext context, String error) {
  if (Localizations.localeOf(context).languageCode == 'en') return error;
  if (error.startsWith('This invite has expired')) {
    return context.l10n.inviteExpired;
  }
  if (error.startsWith('This invite has reached its use limit')) {
    return context.l10n.inviteExhausted;
  }
  if (error.startsWith('This invite is not valid')) {
    return context.l10n.inviteInvalid;
  }
  if (error.startsWith('This invite approval has expired')) {
    return context.l10n.inviteApprovalExpired;
  }
  if (error.startsWith('Could not reach the relay')) {
    return context.l10n.inviteRelayUnreachable;
  }
  return context.l10n.inviteJoinFailed;
}