import 'package:flutter/material.dart';

import 'package:pshared/models/recipient/recipient.dart';

import 'package:pweb/pages/address_book/page/search.dart';
import 'package:pweb/pages/payment_methods/widgets/section_title.dart';
import 'package:pweb/providers/recipient.dart';
import 'package:pweb/utils/dimensions.dart';


class RecipientSection extends StatelessWidget {
  final Recipient? recipient;
  final AppDimensions dimensions;
  final RecipientProvider recipientProvider;
  final TextEditingController searchController;
  final FocusNode searchFocusNode;
  final ValueChanged<String> onSearchChanged;
  final ValueChanged<Recipient> onRecipientSelected;
  final VoidCallback onRecipientCleared;

  const RecipientSection({
    super.key,
    required this.recipient,
    required this.dimensions,
    required this.recipientProvider,
    required this.searchController,
    required this.searchFocusNode,
    required this.onSearchChanged,
    required this.onRecipientSelected,
    required this.onRecipientCleared,
  });

  @override
  Widget build(BuildContext context) {
    if (recipient != null) {
      return SelectedRecipientCard(
        dimensions: dimensions,
        recipient: recipient!,
        onClear: onRecipientCleared,
      );
    }

    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        const SectionTitle('Recipient'),
        SizedBox(height: dimensions.paddingSmall),
        RecipientSearchField(
          controller: searchController,
          onChanged: onSearchChanged,
          focusNode: searchFocusNode,
        ),
        if (recipientProvider.query.isNotEmpty) ...[
          SizedBox(height: dimensions.paddingMedium),
          RecipientSearchResults(
            dimensions: dimensions,
            recipientProvider: recipientProvider,
            onRecipientSelected: onRecipientSelected,
          ),
        ],
      ],
    );
  }
}

class SelectedRecipientCard extends StatelessWidget {
  final AppDimensions dimensions;
  final Recipient recipient;
  final VoidCallback onClear;

  const SelectedRecipientCard({
    super.key,
    required this.dimensions,
    required this.recipient,
    required this.onClear,
  });

  @override
  Widget build(BuildContext context) {
    final theme = Theme.of(context);

    return Container(
      width: double.infinity,
      padding: EdgeInsets.all(dimensions.paddingMedium),
      decoration: BoxDecoration(
        color: theme.colorScheme.surfaceVariant.withOpacity(0.4),
        borderRadius: BorderRadius.circular(dimensions.borderRadiusSmall),
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          const SectionTitle('Recipient'),
          SizedBox(height: dimensions.paddingSmall),
          Row(
            children: [
              CircleAvatar(
                child: Text(recipient.name.substring(0, 1).toUpperCase()),
              ),
              SizedBox(width: dimensions.paddingMedium),
              Expanded(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Text(recipient.name, style: theme.textTheme.titleMedium),
                    if (recipient.email.isNotEmpty)
                      Text(
                        recipient.email,
                        style: theme.textTheme.bodyMedium?.copyWith(
                          color: theme.colorScheme.onSurface.withOpacity(0.7),
                        ),
                      ),
                  ],
                ),
              ),
              TextButton(
                onPressed: onClear,
                child: const Text('Choose another recipient'),
              ),
            ],
          ),
        ],
      ),
    );
  }
}

class RecipientSearchResults extends StatelessWidget {
  final AppDimensions dimensions;
  final RecipientProvider recipientProvider;
  final ValueChanged<Recipient> onRecipientSelected;

  const RecipientSearchResults({
    super.key,
    required this.dimensions,
    required this.recipientProvider,
    required this.onRecipientSelected,
  });

  @override
  Widget build(BuildContext context) {
    if (recipientProvider.isLoading) {
      return const Center(child: CircularProgressIndicator());
    }

    if (recipientProvider.error != null) {
      return Text(
        recipientProvider.error!,
        style: TextStyle(color: Theme.of(context).colorScheme.error),
      );
    }

    if (recipientProvider.recipients.isEmpty) {
      return const Text('No recipients yet.');
    }

    final results = recipientProvider.filteredRecipients;

    if (results.isEmpty) {
      return const Text('No recipients found for this query.');
    }

    return ConstrainedBox(
      constraints: const BoxConstraints(maxHeight: 240),
      child: ListView.separated(
        shrinkWrap: true,
        itemCount: results.length,
        separatorBuilder: (_, __) => SizedBox(height: dimensions.paddingSmall),
        itemBuilder: (context, index) {
          final recipient = results[index];
          return ListTile(
            shape: RoundedRectangleBorder(
              borderRadius: BorderRadius.circular(dimensions.borderRadiusSmall),
            ),
            tileColor: Theme.of(context).colorScheme.surfaceVariant.withOpacity(0.2),
            leading: CircleAvatar(
              child: Text(recipient.name.substring(0, 1).toUpperCase()),
            ),
            title: Text(recipient.name),
            subtitle: Text(recipient.email),
            trailing: const Icon(Icons.arrow_forward_ios_rounded, size: 16),
            onTap: () => onRecipientSelected(recipient),
          );
        },
      ),
    );
  }
}