import 'package:flutter/material.dart';
import 'package:intl/intl.dart';
import '../../../../core/l10n/l10n.dart';
import '../../../../core/theme/design_tokens.dart';
import '../../../../shared/widgets/app_button.dart';
import '../../domain/services/reminder_queue_manager.dart';
import '../../domain/models/reminder_payload.dart';

class ReminderOverlay extends StatefulWidget {
  const ReminderOverlay({
    super.key,
    required this.queueManager,
    required this.onComplete,
    required this.onSnooze,
    required this.onArchive,
  });

  final ReminderQueueManager queueManager;
  final VoidCallback onComplete;
  final void Function(int minutes) onSnooze;
  final VoidCallback onArchive;

  @override
  State<ReminderOverlay> createState() => _ReminderOverlayState();
}

class _ReminderOverlayState extends State<ReminderOverlay> {
  OverlayEntry? _overlayEntry;

  ReminderPayload? get _currentPayload => widget.queueManager.currentPayload;

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

  void _hideSnoozeOptions() {
    _overlayEntry?.remove();
    _overlayEntry = null;
  }

  void _showSnoozeDropdown() {
    _hideSnoozeOptions();

    final box = context.findRenderObject() as RenderBox?;
    if (box == null) return;

    final button = box.localToGlobal(Offset.zero);

    _overlayEntry = OverlayEntry(
      builder: (context) => Positioned(
        left: button.dx,
        top: button.dy + box.size.height + 4,
        width: 120,
        child: Material(
          elevation: 4,
          borderRadius: BorderRadius.circular(8),
          child: Container(
            decoration: BoxDecoration(
              color: AppColors.white,
              borderRadius: BorderRadius.circular(8),
              border: Border.all(color: AppColors.borderSecondary),
            ),
            child: Column(
              mainAxisSize: MainAxisSize.min,
              children: [
                _SnoozeOption(
                  label: context.l10n.notificationSnoozeMinutes(5),
                  onTap: () {
                    _hideSnoozeOptions();
                    _handleSnooze(5);
                  },
                ),
                const Divider(height: 1, color: AppColors.borderSecondary),
                _SnoozeOption(
                  label: context.l10n.notificationSnoozeMinutes(15),
                  onTap: () {
                    _hideSnoozeOptions();
                    _handleSnooze(15);
                  },
                ),
              ],
            ),
          ),
        ),
      ),
    );

    Overlay.of(context).insert(_overlayEntry!);
  }

  void _handleComplete() {
    widget.onArchive();
    widget.queueManager.dequeueCurrent();
    widget.onComplete();
  }

  void _handleSnooze(int minutes) {
    widget.onSnooze(minutes);
    widget.queueManager.dequeueCurrent();
    widget.onComplete();
  }

  @override
  Widget build(BuildContext context) {
    final payload = _currentPayload;
    if (payload == null) {
      return const SizedBox.shrink();
    }

    return Container(
      color: AppColors.white,
      child: SafeArea(
        child: Padding(
          padding: const EdgeInsets.all(AppSpacing.lg),
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              Text(
                payload.title,
                style: Theme.of(context).textTheme.headlineSmall?.copyWith(
                  color: AppColors.slate900,
                  fontWeight: FontWeight.w600,
                ),
                textAlign: TextAlign.center,
              ),
              const SizedBox(height: AppSpacing.sm),
              Text(
                DateFormat('HH:mm').format(DateTime.now()),
                style: Theme.of(
                  context,
                ).textTheme.titleLarge?.copyWith(color: AppColors.slate500),
                textAlign: TextAlign.center,
              ),
              const SizedBox(height: AppSpacing.xl),
              Row(
                children: [
                  Expanded(
                    child: AppButton(
                      text: context.l10n.notificationSnoozeLater,
                      isOutlined: true,
                      onPressed: _showSnoozeDropdown,
                    ),
                  ),
                  const SizedBox(width: AppSpacing.md),
                  Expanded(
                    child: AppButton(
                      text: context.l10n.commonDone,
                      onPressed: _handleComplete,
                    ),
                  ),
                ],
              ),
            ],
          ),
        ),
      ),
    );
  }
}

class _SnoozeOption extends StatelessWidget {
  const _SnoozeOption({required this.label, required this.onTap});

  final String label;
  final VoidCallback onTap;

  @override
  Widget build(BuildContext context) {
    return InkWell(
      onTap: onTap,
      child: Padding(
        padding: const EdgeInsets.symmetric(
          horizontal: AppSpacing.md,
          vertical: AppSpacing.sm,
        ),
        child: Text(
          label,
          style: Theme.of(
            context,
          ).textTheme.bodyMedium?.copyWith(color: AppColors.slate900),
        ),
      ),
    );
  }
}