import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import '../../../core/providers/auth_provider.dart';
import '../../../core/services/realtime_service.dart';
import '../../../core/theme/app_theme.dart';
import '../../../core/widgets/gradient_app_bar.dart';
import '../../../models/job.dart';
import 'lab_jobs_repository.dart';

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

  @override
  ConsumerState<LabJobsInboundScreen> createState() =>
      _LabJobsInboundScreenState();
}

class _LabJobsInboundScreenState extends ConsumerState<LabJobsInboundScreen> {
  late Future<List<Job>> _future;
  bool _acceptingAll = false;
  late UnsubFn _unsub;

  @override
  void initState() {
    super.initState();
    _load();
    final tenantId = ref.read(authProvider).activeTenant!.tenant.id;
    _unsub = RealtimeService.instance.watch(
      'jobs',
      filter: "lab_tenant_id='$tenantId'",
      onEvent: (_) { if (mounted) _load(); },
    );
  }

  @override
  void dispose() {
    _unsub();
    super.dispose();
  }

  void _load() {
    final tenantId = ref.read(authProvider).activeTenant!.tenant.id;
    setState(() {
      _future =
          LabJobsRepository.instance.listInbound(tenantId, status: 'pending');
    });
  }

  Future<void> _acceptJob(Job job) async {
    try {
      await LabJobsRepository.instance.acceptJob(job);
      _load();
      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text('İş kabul edildi')),
        );
      }
    } catch (e) {
      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(content: Text('Hata: $e')),
        );
      }
    }
  }

  Future<void> _bulkAccept() async {
    final tenantId = ref.read(authProvider).activeTenant!.tenant.id;
    setState(() => _acceptingAll = true);
    try {
      await LabJobsRepository.instance.bulkAcceptPending(tenantId);
      _load();
      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text('Tüm işler kabul edildi')),
        );
      }
    } catch (e) {
      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(content: Text('Hata: $e')),
        );
      }
    } finally {
      if (mounted) setState(() => _acceptingAll = false);
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: AppColors.background,
      appBar: GradientAppBar(
        title: 'Gelen İşler',
        category: 'LABORATUVAR',
      ),
      floatingActionButton: FloatingActionButton.extended(
        onPressed: _acceptingAll ? null : _bulkAccept,
        icon: _acceptingAll
            ? const SizedBox(
                width: 18,
                height: 18,
                child: CircularProgressIndicator(
                    strokeWidth: 2, color: Colors.white),
              )
            : const Icon(Icons.done_all),
        label:
            Text(_acceptingAll ? 'Kabul ediliyor...' : 'Tümünü Kabul Et'),
        backgroundColor: AppColors.pending,
        foregroundColor: Colors.white,
      ),
      body: RefreshIndicator(
        onRefresh: () async => _load(),
        child: FutureBuilder<List<Job>>(
          future: _future,
          builder: (ctx, snap) {
            if (snap.connectionState == ConnectionState.waiting) {
              return const Center(child: CircularProgressIndicator());
            }
            if (snap.hasError) {
              return Center(
                child: Column(
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    Text('Hata: ${snap.error}'),
                    const SizedBox(height: 12),
                    FilledButton(
                      onPressed: _load,
                      child: const Text('Tekrar Dene'),
                    ),
                  ],
                ),
              );
            }

            final jobs = snap.data!;

            if (jobs.isEmpty) {
              return Center(
                child: Column(
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    Icon(Icons.inbox_outlined, size: 64, color: AppColors.textMuted),
                    const SizedBox(height: 16),
                    Text(
                      'Bekleyen iş yok',
                      style: TextStyle(
                          fontSize: 16, color: AppColors.textSecondary),
                    ),
                  ],
                ),
              );
            }

            return ListView.builder(
              padding: const EdgeInsets.fromLTRB(16, 16, 16, 80),
              itemCount: jobs.length,
              itemBuilder: (ctx, i) {
                final job = jobs[i];
                return _InboundJobCard(
                  job: job,
                  onAccept: () => _acceptJob(job),
                );
              },
            );
          },
        ),
      ),
    );
  }
}

class _InboundJobCard extends StatefulWidget {
  const _InboundJobCard({required this.job, required this.onAccept});
  final Job job;
  final VoidCallback onAccept;

  @override
  State<_InboundJobCard> createState() => _InboundJobCardState();
}

class _InboundJobCardState extends State<_InboundJobCard> {
  bool _accepting = false;

  String _formatDate(DateTime dt) =>
      '${dt.day.toString().padLeft(2, '0')}.${dt.month.toString().padLeft(2, '0')}.${dt.year}';

  @override
  Widget build(BuildContext context) {
    final job = widget.job;
    return Semantics(
      label: job.patientCode,
      button: true,
      excludeSemantics: true,
      child: Dismissible(
      key: ValueKey(job.id),
      direction: DismissDirection.endToStart,
      background: Container(
        alignment: Alignment.centerRight,
        padding: const EdgeInsets.only(right: 20),
        margin: const EdgeInsets.only(bottom: 8),
        decoration: BoxDecoration(
          color: AppColors.success,
          borderRadius: BorderRadius.circular(12),
        ),
        child: const Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Icon(Icons.check, color: Colors.white, size: 28),
            SizedBox(height: 4),
            Text('Kabul Et',
                style: TextStyle(color: Colors.white, fontSize: 12)),
          ],
        ),
      ),
      confirmDismiss: (_) async {
        setState(() => _accepting = true);
        try {
          await LabJobsRepository.instance.acceptJob(job);
          return true;
        } catch (e) {
          if (context.mounted) {
            ScaffoldMessenger.of(context).showSnackBar(
              SnackBar(content: Text('Hata: $e')),
            );
          }
          return false;
        } finally {
          if (mounted) setState(() => _accepting = false);
        }
      },
      child: Card(
        margin: const EdgeInsets.only(bottom: 8),
        child: Padding(
          padding: const EdgeInsets.all(14),
          child: Row(
            children: [
              CircleAvatar(
                backgroundColor: AppColors.pendingBg,
                child: const Icon(Icons.assignment_outlined,
                    color: AppColors.pending),
              ),
              const SizedBox(width: 12),
              Expanded(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Text(
                      job.patientCode,
                      style: const TextStyle(fontWeight: FontWeight.bold),
                    ),
                    const SizedBox(height: 2),
                    Text(
                      job.clinicName ?? 'Klinik',
                      style: TextStyle(
                          color: AppColors.textSecondary, fontSize: 13),
                    ),
                    const SizedBox(height: 4),
                    Row(
                      children: [
                        _Chip(
                          label: job.prostheticType.label,
                          color: AppColors.inProgressBg,
                          textColor: AppColors.inProgress,
                        ),
                        const SizedBox(width: 6),
                        _Chip(
                          label: '${job.memberCount} üye',
                          color: AppColors.background,
                          textColor: AppColors.textSecondary,
                        ),
                      ],
                    ),
                    const SizedBox(height: 4),
                    Text(
                      _formatDate(job.dateCreated),
                      style: TextStyle(
                          color: AppColors.textMuted, fontSize: 12),
                    ),
                  ],
                ),
              ),
              const SizedBox(width: 8),
              _accepting
                  ? const SizedBox(
                      width: 24,
                      height: 24,
                      child: CircularProgressIndicator(strokeWidth: 2),
                    )
                  : FilledButton(
                      onPressed: widget.onAccept,
                      style: FilledButton.styleFrom(
                        backgroundColor: AppColors.success,
                        padding: const EdgeInsets.symmetric(
                            horizontal: 12, vertical: 8),
                        minimumSize: Size.zero,
                        tapTargetSize: MaterialTapTargetSize.shrinkWrap,
                      ),
                      child: const Text('Kabul Et',
                          style: TextStyle(fontSize: 13)),
                    ),
            ],
          ),
        ),
      ),
      ),
    );
  }
}

class _Chip extends StatelessWidget {
  const _Chip(
      {required this.label,
      required this.color,
      required this.textColor});
  final String label;
  final Color color;
  final Color textColor;

  @override
  Widget build(BuildContext context) {
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 2),
      decoration: BoxDecoration(
        color: color,
        borderRadius: BorderRadius.circular(10),
      ),
      child: Text(label,
          style: TextStyle(
              color: textColor,
              fontSize: 11,
              fontWeight: FontWeight.w500)),
    );
  }
}