import 'package:flutter/material.dart';
import 'package:hooks_riverpod/hooks_riverpod.dart';
import 'package:lucide_icons_flutter/lucide_icons.dart';

import '../l10n/l10n.dart';
import '../theme/theme.dart';
import '../widgets/sheet_divider.dart';
import '../widgets/modal_presentation.dart';
import 'reminder_service.dart';
import 'reminder_time_presets.dart';

/// Bottom sheet for "Remind me later": desktop-parity presets plus a native
/// date/time picker, publishing the same author-private kind-30300 reminder
/// events desktop reads.
void showRemindMeLaterSheet({
  required BuildContext context,
  required WidgetRef ref,
  required ReminderTarget target,
}) {
  final service = ref.read(reminderServiceProvider);
  final messenger = ScaffoldMessenger.of(context);
  if (service == null) {
    messenger.showSnackBar(
      SnackBar(content: Text(context.l10n.signInSetReminders)),
    );
    return;
  }

  Future<void> submit(int notBefore) async {
    try {
      await service.createReminder(target: target, notBefore: notBefore);
      messenger.showSnackBar(SnackBar(content: Text(context.l10n.reminderSet)));
    } catch (error) {
      // Stable user-facing copy; the relay/crypto detail goes to the log.
      debugPrint('[RemindMeLater] createReminder failed: $error');
      messenger.showSnackBar(
        SnackBar(content: Text(context.l10n.reminderSetFailed)),
      );
    }
  }

  showBuzzModalBottomSheet<void>(
    context: context,
    showDragHandle: true,
    builder: (sheetContext) => SafeArea(
      child: IconTheme.merge(
        data: const IconThemeData(size: 22),
        child: SingleChildScrollView(
          child: Padding(
            padding: const EdgeInsets.fromLTRB(
              Grid.gutter,
              0,
              Grid.gutter,
              Grid.xs,
            ),
            child: Column(
              mainAxisSize: MainAxisSize.min,
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Padding(
                  padding: const EdgeInsets.only(
                    left: Grid.half,
                    bottom: Grid.xxs,
                  ),
                  child: Text(
                    sheetContext.l10n.remindAboutMessage,
                    style: Theme.of(sheetContext).textTheme.titleSmall,
                  ),
                ),
                for (final preset in reminderTimePresets)
                  ListTile(
                    leading: const Icon(LucideIcons.clock),
                    title: Text(_presetLabel(sheetContext, preset)),
                    onTap: () {
                      Navigator.of(sheetContext).pop();
                      submit(preset.getTimestamp());
                    },
                  ),
                const SheetDivider(),
                ListTile(
                  leading: const Icon(LucideIcons.calendarClock),
                  title: Text(sheetContext.l10n.pickDateTime),
                  onTap: () async {
                    final navigator = Navigator.of(sheetContext);
                    final timestamp = await _pickCustomDateTime(context);
                    // Cancelled or not-in-the-future: keep the preset sheet
                    // open so retrying doesn't mean long-pressing again.
                    if (timestamp == null) return;
                    if (navigator.mounted) navigator.pop();
                    await submit(timestamp);
                  },
                ),
              ],
            ),
          ),
        ),
      ),
    ),
  );
}

/// Native date + time pickers chained together. Returns a future Unix
/// timestamp in seconds, or null when cancelled or not in the future.
Future<int?> _pickCustomDateTime(BuildContext context) async {
  final now = DateTime.now();
  final date = await showBuzzDialog<DateTime>(
    context: context,
    builder: (_) => DatePickerDialog(
      initialDate: now,
      firstDate: DateTime(now.year, now.month, now.day),
      lastDate: now.add(const Duration(days: 365 * 2)),
    ),
  );
  if (date == null || !context.mounted) return null;

  final time = await showBuzzDialog<TimeOfDay>(
    context: context,
    builder: (_) =>
        const TimePickerDialog(initialTime: TimeOfDay(hour: 9, minute: 0)),
  );
  if (time == null) return null;

  final timestamp = combineCustomDateTime(date, time.hour, time.minute);
  if (timestamp == null && context.mounted) {
    ScaffoldMessenger.of(
      context,
    ).showSnackBar(SnackBar(content: Text(context.l10n.pickFutureTime)));
  }
  return timestamp;
}

String _presetLabel(BuildContext context, ReminderTimePreset preset) {
  final l10n = context.l10n;
  return switch (preset.id) {
    ReminderTimePresetId.in30Minutes => l10n.reminderIn30Minutes,
    ReminderTimePresetId.in1Hour => l10n.reminderIn1Hour,
    ReminderTimePresetId.in3Hours => l10n.reminderIn3Hours,
    ReminderTimePresetId.tomorrow9am => l10n.reminderTomorrow9am,
    ReminderTimePresetId.nextMonday9am => l10n.reminderNextMonday9am,
    ReminderTimePresetId.legacy => preset.label,
  };
}