import 'package:enter_farma_plus_mobile/src/core/storage/tenant_session_store.dart';
import 'package:enter_farma_plus_mobile/src/core/theme/app_tokens.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';

class SettingsScreen extends ConsumerStatefulWidget {
  const SettingsScreen({super.key});

  @override
  ConsumerState<SettingsScreen> createState() => _SettingsScreenState();
}

class _SettingsScreenState extends ConsumerState<SettingsScreen> {
  @override
  Widget build(BuildContext context) {
    final sessionAsync = ref.watch(currentSessionProvider);
    final isSeller = sessionAsync.maybeWhen(
      data: (s) => s?.isSeller ?? false,
      orElse: () => false,
    );

    final options = <_OptionEntry>[
      _OptionEntry(
        icon: Icons.person_rounded,
        title: 'Mi perfil',
        accent: AppTokens.primary,
        onTap: () => context.go('/profile'),
      ),
      _OptionEntry(
        icon: Icons.sync_problem_rounded,
        title: 'Pendientes sync',
        accent: AppTokens.warning,
        onTap: () => context.go('/pending-sync'),
      ),
      if (!isSeller) ...[
        _OptionEntry(
          icon: Icons.inventory_2_rounded,
          title: 'Productos',
          accent: AppTokens.primary,
          onTap: () => context.go('/catalog'),
        ),
        _OptionEntry(
          icon: Icons.design_services_rounded,
          title: 'Servicios',
          accent: AppTokens.cta,
          onTap: () => context.go('/services'),
        ),
        _OptionEntry(
          icon: Icons.people_alt_rounded,
          title: 'Clientes',
          accent: AppTokens.success,
          onTap: () => context.go('/customers'),
        ),
        _OptionEntry(
          icon: Icons.local_shipping_rounded,
          title: 'Proveedores',
          accent: AppTokens.cta,
          onTap: () => context.go('/suppliers'),
        ),
        _OptionEntry(
          icon: Icons.shopping_bag_rounded,
          title: 'Compras',
          accent: AppTokens.warning,
          onTap: () => context.go('/purchases'),
        ),
        _OptionEntry(
          icon: Icons.receipt_long_rounded,
          title: 'Ventas emitidas',
          accent: AppTokens.primary,
          onTap: () => context.go('/sales-history'),
        ),
        _OptionEntry(
          icon: Icons.hourglass_top_rounded,
          title: 'Por anular',
          accent: AppTokens.warning,
          onTap: () => context.go('/pending-voided'),
        ),
        _OptionEntry(
          icon: Icons.cloud_sync_rounded,
          title: 'Consulta SUNAT',
          accent: AppTokens.secondary,
          onTap: () => context.go('/quick'),
        ),
      ],
    ];

    return SafeArea(
      child: ListView(
        padding: AppTokens.pagePadding,
        children: [
          GridView.builder(
            shrinkWrap: true,
            physics: const NeverScrollableScrollPhysics(),
            itemCount: options.length,
            gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
              crossAxisCount: 2,
              crossAxisSpacing: 12,
              mainAxisSpacing: 12,
              childAspectRatio: 1.15,
            ),
            itemBuilder: (context, index) {
              final option = options[index];
              return _OptionCard(entry: option);
            },
          ),
        ],
      ),
    );
  }
}

class _OptionEntry {
  const _OptionEntry({
    required this.icon,
    required this.title,
    required this.accent,
    required this.onTap,
  });

  final IconData icon;
  final String title;
  final Color accent;
  final VoidCallback onTap;
}

class _OptionCard extends StatelessWidget {
  const _OptionCard({required this.entry});

  final _OptionEntry entry;

  @override
  Widget build(BuildContext context) {
    return Material(
      color: AppTokens.surface,
      borderRadius: BorderRadius.circular(AppTokens.radiusMedium),
      child: InkWell(
        onTap: entry.onTap,
        borderRadius: BorderRadius.circular(AppTokens.radiusMedium),
        child: Container(
          padding: const EdgeInsets.all(16),
          decoration: BoxDecoration(
            borderRadius: BorderRadius.circular(AppTokens.radiusMedium),
            border: Border.all(color: AppTokens.border),
          ),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
              Container(
                width: 48,
                height: 48,
                decoration: BoxDecoration(
                  color: entry.accent.withValues(alpha: 0.12),
                  borderRadius: BorderRadius.circular(14),
                ),
                child: Icon(entry.icon, color: entry.accent, size: 26),
              ),
              const SizedBox(height: 12),
              Text(
                entry.title,
                maxLines: 2,
                overflow: TextOverflow.ellipsis,
                style: Theme.of(context).textTheme.titleSmall?.copyWith(
                      fontWeight: FontWeight.w700,
                    ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}