import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:font_awesome_flutter/font_awesome_flutter.dart';
import 'package:url_launcher/url_launcher.dart';
import '../../core/auth/auth_notifier.dart';
import '../../core/theme/halo_tokens.dart';
import '../../core/theme/widgets/widgets.dart';
import 'support_handles_provider.dart';

/// Bestie Profil tab — mirrors
/// `figma-bestie/project/screens/v5.jsx::BestieProfile`.
///
/// Lives inside branch 2 of the shell (`router.dart`), so `BestieTabBar` is
/// rendered by `ShellScreen` — this screen owns body content only.
///
/// Menu items mirror the figma: Chat WhatsApp Kami + Chat Telegram Kami
/// (both deep-link via `support_handles_json` from backend config), then
/// Syarat & Ketentuan + Kebijakan Privasi (TODO content). Danger zone is
/// Keluar (logout) only — account deletion is intentionally not exposed
/// in-app; mitras request deletion via the same WA/TG channels.
class ProfilScreen extends ConsumerWidget {
  const ProfilScreen({super.key});

  // TODO(stage-4): replace with `PackageInfo.fromPlatform().version` when
  // the `package_info_plus` package is added in a future change.
  static const String _appVersion = '1.0.0';

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final authState = ref.watch(mitraAuthProvider);
    final authData = authState.valueOrNull;
    final handlesAsync = ref.watch(supportHandlesProvider);

    final profile = authData is MitraAuthAuthenticatedData ? authData.profile : null;
    final displayName = (profile?['display_name'] as String?) ?? 'Bestie';
    final phone = (profile?['phone'] as String?) ?? '';

    return Scaffold(
      backgroundColor: HaloTokens.bg,
      body: SafeArea(
        child: SingleChildScrollView(
          padding: const EdgeInsets.fromLTRB(20, 24, 20, 40),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              const _Header(),
              const SizedBox(height: 20),
              _ProfileCard(displayName: displayName, phone: phone),
              const SizedBox(height: 28),
              _MenuList(
                onTapWa: () => _launchHandle(context, handlesAsync.valueOrNull?.wa),
                onTapTelegram: () => _launchHandle(context, handlesAsync.valueOrNull?.telegram),
                onTapTerms: () => _snack(context, 'Segera tersedia'),
                onTapPrivacy: () => _snack(context, 'Segera tersedia'),
              ),
              const SizedBox(height: 24),
              HaloButton(
                label: 'Keluar',
                fullWidth: true,
                variant: HaloButtonVariant.secondary,
                onPressed: () => _confirmLogout(context, ref),
              ),
              const SizedBox(height: 16),
              const _VersionFooter(version: _appVersion),
            ],
          ),
        ),
      ),
    );
  }

  Future<void> _launchHandle(BuildContext context, SupportHandle? handle) async {
    if (handle == null || handle.deeplink.isEmpty) {
      _snack(context, 'Kontak belum tersedia');
      return;
    }
    final uri = Uri.tryParse(handle.deeplink);
    if (uri == null) {
      _snack(context, 'Tautan tidak valid');
      return;
    }
    final ok = await launchUrl(uri, mode: LaunchMode.externalApplication);
    if (!ok && context.mounted) {
      _snack(context, 'Gagal membuka ${handle.label}');
    }
  }

  void _snack(BuildContext context, String message) {
    ScaffoldMessenger.of(context).showSnackBar(
      SnackBar(
        content: Text(
          message,
          style: const TextStyle(fontFamily: HaloTokens.fontBody),
        ),
        behavior: SnackBarBehavior.floating,
      ),
    );
  }

  Future<void> _confirmLogout(BuildContext context, WidgetRef ref) async {
    final confirmed = await showDialog<bool>(
      context: context,
      barrierDismissible: true,
      builder: (ctx) => AlertDialog(
        title: const Text(
          'Yakin mau keluar?',
          style: TextStyle(
            fontFamily: HaloTokens.fontDisplay,
            fontWeight: FontWeight.w700,
            color: HaloTokens.brandDark,
          ),
        ),
        content: const Text(
          'Kamu bakal sign-out dari akun mitra ini. Login lagi pakai nomor HP yang sama untuk masuk.',
          style: TextStyle(
            fontFamily: HaloTokens.fontBody,
            fontSize: 13.5,
            height: 1.4,
            color: HaloTokens.inkSoft,
          ),
        ),
        actions: [
          TextButton(
            onPressed: () => Navigator.of(ctx).pop(false),
            child: const Text(
              'Batal',
              style: TextStyle(
                fontFamily: HaloTokens.fontBody,
                color: HaloTokens.inkSoft,
                fontWeight: FontWeight.w600,
              ),
            ),
          ),
          TextButton(
            onPressed: () => Navigator.of(ctx).pop(true),
            child: const Text(
              'Keluar',
              style: TextStyle(
                fontFamily: HaloTokens.fontBody,
                color: HaloTokens.danger,
                fontWeight: FontWeight.w700,
              ),
            ),
          ),
        ],
      ),
    );

    if (confirmed == true) {
      await ref.read(mitraAuthProvider.notifier).logout();
      // Router redirect handles navigation to /login on auth state change.
    }
  }
}

// ─── Header — centered "Profil" title (no back arrow; tab nav owns nav) ──
class _Header extends StatelessWidget {
  const _Header();

  @override
  Widget build(BuildContext context) {
    return const Center(
      child: Text(
        'Profil',
        style: TextStyle(
          fontFamily: HaloTokens.fontDisplay,
          fontSize: 22,
          fontWeight: FontWeight.w700,
          color: HaloTokens.brandDark,
          letterSpacing: -0.4,
        ),
      ),
    );
  }
}

// ─── Profile card — HaloOrb + display name + role + phone ────────────────
class _ProfileCard extends StatelessWidget {
  final String displayName;
  final String phone;

  const _ProfileCard({required this.displayName, required this.phone});

  @override
  Widget build(BuildContext context) {
    // Deterministic seed from phone — same number always gets the same orb.
    final seed = phone.isEmpty ? 0 : phone.hashCode;

    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 24),
      decoration: BoxDecoration(
        color: HaloTokens.surface,
        borderRadius: HaloRadius.lg,
        border: Border.all(color: HaloTokens.border),
        boxShadow: HaloShadows.soft,
      ),
      child: Column(
        children: [
          HaloOrb(size: 96, seed: seed),
          const SizedBox(height: 16),
          Text(
            displayName,
            textAlign: TextAlign.center,
            style: const TextStyle(
              fontFamily: HaloTokens.fontDisplay,
              fontSize: 24,
              fontWeight: FontWeight.w700,
              color: HaloTokens.brandDark,
              letterSpacing: -0.4,
            ),
          ),
          const SizedBox(height: 4),
          const Text(
            'Bestie · Mitra Halo Bestie',
            textAlign: TextAlign.center,
            style: TextStyle(
              fontFamily: HaloTokens.fontBody,
              fontSize: 13,
              color: HaloTokens.inkSoft,
            ),
          ),
          if (phone.isNotEmpty) ...[
            const SizedBox(height: 6),
            Text(
              phone,
              textAlign: TextAlign.center,
              style: const TextStyle(
                fontFamily: HaloTokens.fontMono,
                fontSize: 12.5,
                color: HaloTokens.inkMuted,
              ),
            ),
          ],
        ],
      ),
    );
  }
}

// ─── Menu list — WA + Telegram + Terms + Privacy ─────────────────────────
class _MenuList extends StatelessWidget {
  final VoidCallback onTapWa;
  final VoidCallback onTapTelegram;
  final VoidCallback onTapTerms;
  final VoidCallback onTapPrivacy;

  const _MenuList({
    required this.onTapWa,
    required this.onTapTelegram,
    required this.onTapTerms,
    required this.onTapPrivacy,
  });

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        _MenuTile(
          icon: FontAwesomeIcons.whatsapp,
          label: 'Chat WhatsApp Kami',
          onTap: onTapWa,
        ),
        const SizedBox(height: 10),
        _MenuTile(
          icon: FontAwesomeIcons.telegram,
          label: 'Chat Telegram Kami',
          onTap: onTapTelegram,
        ),
        const SizedBox(height: 10),
        _MenuTile(
          icon: Icons.description_outlined,
          label: 'Syarat & Ketentuan',
          onTap: onTapTerms,
        ),
        const SizedBox(height: 10),
        _MenuTile(
          icon: Icons.lock_outline,
          label: 'Kebijakan Privasi',
          onTap: onTapPrivacy,
        ),
      ],
    );
  }
}

class _MenuTile extends StatelessWidget {
  final IconData icon;
  final String label;
  final String? subtitle;
  final VoidCallback onTap;

  const _MenuTile({
    required this.icon,
    required this.label,
    this.subtitle,
    required this.onTap,
  });

  @override
  Widget build(BuildContext context) {
    return Material(
      color: HaloTokens.surface,
      borderRadius: HaloRadius.md,
      child: InkWell(
        borderRadius: HaloRadius.md,
        onTap: onTap,
        child: Container(
          constraints: const BoxConstraints(minHeight: 56),
          padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 12),
          decoration: BoxDecoration(
            borderRadius: HaloRadius.md,
            border: Border.all(color: HaloTokens.border),
          ),
          child: Row(
            children: [
              Container(
                width: 36,
                height: 36,
                decoration: const BoxDecoration(
                  color: HaloTokens.brandSofter,
                  borderRadius: HaloRadius.sm,
                ),
                alignment: Alignment.center,
                child: Icon(icon, size: 18, color: HaloTokens.brandDark),
              ),
              const SizedBox(width: 14),
              Expanded(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    Text(
                      label,
                      style: const TextStyle(
                        fontFamily: HaloTokens.fontBody,
                        fontSize: 14,
                        fontWeight: FontWeight.w500,
                        color: HaloTokens.ink,
                      ),
                    ),
                    if (subtitle != null) ...[
                      const SizedBox(height: 2),
                      Text(
                        subtitle!,
                        style: const TextStyle(
                          fontFamily: HaloTokens.fontBody,
                          fontSize: 11.5,
                          color: HaloTokens.inkMuted,
                        ),
                      ),
                    ],
                  ],
                ),
              ),
              const Icon(
                Icons.chevron_right,
                size: 20,
                color: HaloTokens.inkMuted,
              ),
            ],
          ),
        ),
      ),
    );
  }
}

// ─── Version footer ──────────────────────────────────────────────────────
class _VersionFooter extends StatelessWidget {
  final String version;
  const _VersionFooter({required this.version});

  @override
  Widget build(BuildContext context) {
    return Center(
      child: Text(
        'HaloBestie · v$version',
        style: const TextStyle(
          fontFamily: HaloTokens.fontBody,
          fontSize: 11,
          color: HaloTokens.inkMuted,
        ),
      ),
    );
  }
}