import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:shadcn_ui/shadcn_ui.dart';

import '../../models/supplement.dart';
import '../../providers/supplement_provider.dart';

/// Shows a bulk "Take supplements" dialog for a list of supplements.
/// - No time selection (records as now)
/// - Allows editing units per supplement
/// - Optional shared notes (applies to all)
Future<void> showBulkTakeDialog(
  BuildContext context,
  List<Supplement> supplements,
) async {
  if (supplements.isEmpty) {
    return;
  }

  // Controllers for each supplement's units
  final Map<int, TextEditingController> unitControllers = {
    for (final s in supplements.where((s) => s.id != null))
      s.id!: TextEditingController(text: s.numberOfUnits.toString()),
  };

  final notesController = TextEditingController();

  await showDialog(
    context: context,
    builder: (context) {
      return AlertDialog(
        title: Text('Take ${supplements.length} supplements'),
        content: SizedBox(
          width: double.maxFinite,
          child: ConstrainedBox(
            constraints: const BoxConstraints(maxWidth: 500),
            child: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              // List of supplements with editable units
              // Use a scroll view with explicit max height to avoid intrinsic dimension issues.
              ConstrainedBox(
                constraints: const BoxConstraints(maxHeight: 320),
                child: SingleChildScrollView(
                  child: Column(
                    children: [
                      for (int index = 0; index < supplements.length; index++) ...[
                        () {
                          final s = supplements[index];
                          final controller = unitControllers[s.id] ??
                              TextEditingController(text: s.numberOfUnits.toString());
                          return Container(
                            padding: const EdgeInsets.all(12),
                            decoration: BoxDecoration(
                              color: Theme.of(context).colorScheme.surfaceContainerHighest.withValues(alpha: 0.5),
                              borderRadius: BorderRadius.circular(8),
                              border: Border.all(
                                color: Theme.of(context).colorScheme.outline.withValues(alpha: 0.3),
                              ),
                            ),
                            child: Column(
                              crossAxisAlignment: CrossAxisAlignment.start,
                              children: [
                                // Name and per-unit info
                                Row(
                                  children: [
                                    Expanded(
                                      child: Text(
                                        s.name,
                                        style: const TextStyle(
                                          fontSize: 16,
                                          fontWeight: FontWeight.w600,
                                        ),
                                      ),
                                    ),
                                    const SizedBox(width: 8),
                                    Text(
                                      s.unitType,
                                      style: TextStyle(
                                        fontSize: 12,
                                        color: Theme.of(context).colorScheme.onSurfaceVariant,
                                      ),
                                    ),
                                  ],
                                ),
                                const SizedBox(height: 8),
                                // Units editor
                                Row(
                                  children: [
                                    Expanded(
                                      child: TextField(
                                        controller: controller,
                                        keyboardType: const TextInputType.numberWithOptions(decimal: true),
                                        decoration: InputDecoration(
                                          labelText: 'Units',
                                          border: const OutlineInputBorder(),
                                          suffixText: s.unitType,
                                        ),
                                      ),
                                    ),
                                  ],
                                ),
                                const SizedBox(height: 8),
                                // Dosage line
                                Container(
                                  width: double.infinity,
                                  padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 6),
                                  decoration: BoxDecoration(
                                    color: Theme.of(context).colorScheme.surface,
                                    borderRadius: BorderRadius.circular(6),
                                    border: Border.all(
                                      color: Theme.of(context).colorScheme.outline.withValues(alpha: 0.3),
                                    ),
                                  ),
                                  child: Row(
                                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
                                    children: [
                                      Text(
                                        'Per unit:',
                                        style: TextStyle(
                                          fontSize: 12,
                                          color: Theme.of(context).colorScheme.onSurfaceVariant,
                                        ),
                                      ),
                                      Text(
                                        s.ingredientsDisplay,
                                        style: TextStyle(
                                          fontSize: 12,
                                          fontWeight: FontWeight.w600,
                                          color: Theme.of(context).colorScheme.onSurface,
                                        ),
                                      ),
                                    ],
                                  ),
                                ),
                              ],
                            ),
                          );
                        }(),
                        if (index != supplements.length - 1) const SizedBox(height: 8),
                      ],
                    ],
                  ),
                ),
              ),
              const SizedBox(height: 12),
              // Shared notes
              TextField(
                controller: notesController,
                decoration: const InputDecoration(
                  labelText: 'Notes for all (optional)',
                  border: OutlineInputBorder(),
                ),
                maxLines: 2,
              ),
            ],
          ),
        )),
        actions: [
          TextButton(
            onPressed: () => Navigator.of(context).pop(),
            child: const Text('Cancel'),
          ),
          ElevatedButton(
            onPressed: () {
              final provider = context.read<SupplementProvider>();
              int recorded = 0;

              for (final s in supplements) {
                if (s.id == null) continue;
                final controller = unitControllers[s.id]!;
                final units = double.tryParse(controller.text) ?? s.numberOfUnits.toDouble();

                // totalDosageTaken stays 0.0 for now (ingredients-based tracking later)
                provider.recordIntake(
                  s.id!,
                  0.0,
                  unitsTaken: units,
                  notes: notesController.text.isNotEmpty ? notesController.text : null,
                  takenAt: null, // "now"
                );
                recorded++;
              }

              Navigator.of(context).pop();
              if (recorded > 0) {
                final sonner = ShadSonner.of(context);
                final id = DateTime.now().millisecondsSinceEpoch;
                sonner.show(
                  ShadToast(
                    id: id,
                    title: Text('Recorded $recorded supplement${recorded == 1 ? '' : 's'}'),
                    action: ShadButton(
                      size: ShadButtonSize.sm,
                      child: const Text('Dismiss'),
                      onPressed: () => sonner.hide(id),
                    ),
                  ),
                );
              }
            },
            child: const Text('Record All'),
          ),
        ],
      );
    },
  );

  // Dispose controllers
  for (final c in unitControllers.values) {
    c.dispose();
  }
  notesController.dispose();
}