import 'package:flutter/material.dart';

import '../data/chat_message_matcher.dart';
import 'chat_search_controller.dart';
import 'chat_search_results.dart';

/// Search inside one chat, built like `FilesSearchDelegate`. Closes with the
/// tapped hit so the chat can jump there.
class ChatSearchDelegate extends SearchDelegate<ChatSearchHit?> {
  final ChatSearchController _controller;

  ChatSearchDelegate(this._controller)
    : super(searchFieldLabel: 'In Chat suchen');

  /// Must be called by the host widget after `showSearch` returns so the
  /// controller's listeners and pending debounce timers are released.
  void disposeController() => _controller.dispose();

  @override
  List<Widget>? buildActions(BuildContext context) => [
    if (query.isNotEmpty)
      IconButton(
        tooltip: 'Suche leeren',
        icon: const Icon(Icons.clear),
        onPressed: () {
          query = '';
        },
      ),
  ];

  @override
  Widget? buildLeading(BuildContext context) => IconButton(
    icon: const Icon(Icons.arrow_back),
    tooltip: 'Zurück',
    onPressed: () => close(context, null),
  );

  @override
  Widget buildResults(BuildContext context) => buildSuggestions(context);

  @override
  Widget buildSuggestions(BuildContext context) {
    _controller.setQuery(query);
    return ChatSearchResults(
      controller: _controller,
      onResultTap: (hit) => close(context, hit),
    );
  }
}