import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';
import '../../../core/chat/active_session_notifier.dart';
import '../../../core/pairing/pairing_notifier.dart';
import '../../../core/theme/halo_tokens.dart';
import '../../../core/theme/widgets/widgets.dart';

/// Phase 4 Stage 5 — S9 Match-found screen.
///
/// Reskinned from the v4 mock (`v4.jsx::S9MatchV4`). Shows the matched
/// bestie's orb + a small online status dot, the matched-line copy, and a
/// primary CTA `mulai sesi {N} menit →`. The duration is read from the active
/// session payload (which the pairing notifier kicks via
/// `activeSessionProvider.refresh()` on the WS `paired` event).
///
/// `PairingActiveData` is the auto-advance signal — fired by the notifier
/// ~2s after WS `paired` lands. The same advance is also reachable manually
/// via the CTA in case the user is faster than the auto-advance timer.
class BestieFoundScreen extends ConsumerStatefulWidget {
  final String sessionId;
  final String mitraName;

  const BestieFoundScreen({
    super.key,
    required this.sessionId,
    required this.mitraName,
  });

  @override
  ConsumerState<BestieFoundScreen> createState() => _BestieFoundScreenState();
}

class _BestieFoundScreenState extends ConsumerState<BestieFoundScreen> {
  @override
  void initState() {
    super.initState();
    ref.listenManual<PairingData>(pairingProvider, (prev, next) {
      if (!mounted) return;
      if (next is PairingActiveData) {
        context.go('/chat/session/${next.sessionId}', extra: next.mitraName);
      }
    });
  }

  void _enterChat() {
    context.go('/chat/session/${widget.sessionId}', extra: widget.mitraName);
  }

  @override
  Widget build(BuildContext context) {
    final activeSession = ref.watch(activeSessionProvider).valueOrNull;
    final durationMinutes =
        activeSession?.session?['duration_minutes'] as int?;
    final ctaLabel = durationMinutes != null
        ? 'mulai sesi $durationMinutes menit →'
        : 'mulai sesi →';
    final subtitle = durationMinutes != null
        ? 'siap nemenin kamu $durationMinutes menit ke depan. cerita aja pelan-pelan ya 🤍'
        : 'siap nemenin kamu. cerita aja pelan-pelan ya 🤍';

    return Scaffold(
      backgroundColor: HaloTokens.bg,
      body: SafeArea(
        child: Padding(
          padding: const EdgeInsets.fromLTRB(
            HaloSpacing.s24,
            HaloSpacing.s24,
            HaloSpacing.s24,
            HaloSpacing.s24,
          ),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              Expanded(
                child: Center(
                  child: Column(
                    mainAxisSize: MainAxisSize.min,
                    children: [
                      Stack(
                        children: [
                          HaloOrb(
                            size: 140,
                            seed: widget.mitraName.hashCode,
                            label: widget.mitraName,
                          ),
                          Positioned(
                            right: 4,
                            bottom: 4,
                            child: Container(
                              width: 28,
                              height: 28,
                              decoration: BoxDecoration(
                                shape: BoxShape.circle,
                                color: HaloTokens.success,
                                border: Border.all(
                                  color: HaloTokens.bg,
                                  width: 3,
                                ),
                              ),
                            ),
                          ),
                        ],
                      ),
                      const SizedBox(height: HaloSpacing.s20),
                      const Text(
                        '◦ MATCHED ◦',
                        style: TextStyle(
                          fontFamily: HaloTokens.fontBody,
                          fontSize: 12,
                          fontWeight: FontWeight.w700,
                          letterSpacing: 1.6,
                          color: HaloTokens.brand,
                        ),
                      ),
                      const SizedBox(height: HaloSpacing.s8),
                      Text(
                        'halo, aku bestie ${widget.mitraName}',
                        textAlign: TextAlign.center,
                        style: const TextStyle(
                          fontFamily: HaloTokens.fontDisplay,
                          fontSize: 26,
                          height: 32 / 26,
                          fontWeight: FontWeight.w700,
                          color: HaloTokens.brandDark,
                        ),
                      ),
                      const SizedBox(height: HaloSpacing.s8),
                      ConstrainedBox(
                        constraints: const BoxConstraints(maxWidth: 280),
                        child: Text(
                          subtitle,
                          textAlign: TextAlign.center,
                          style: const TextStyle(
                            fontFamily: HaloTokens.fontBody,
                            fontSize: 14,
                            height: 22 / 14,
                            color: HaloTokens.inkSoft,
                          ),
                        ),
                      ),
                    ],
                  ),
                ),
              ),
              HaloButton(
                label: ctaLabel,
                fullWidth: true,
                size: HaloButtonSize.lg,
                onPressed: _enterChat,
              ),
            ],
          ),
        ),
      ),
    );
  }
}