import 'dart:convert';
import 'package:http/http.dart' as http;
import '../models/action_template.dart';
import '../../core/constants/api_constants.dart';

/// Service for fetching action templates and categories
/// Used by ActionPickerDialog to show available actions
class ActionTemplateService {
  final String baseUrl;
  final String? authToken;

  ActionTemplateService({
    required this.baseUrl,
    this.authToken,
  });

  Map<String, String> get _headers => {
        'Content-Type': 'application/json',
        if (authToken != null) 'Authorization': 'Bearer $authToken',
      };

  /// Fetch all action categories
  Future<ActionCategoriesResponse> getActionCategories() async {
    final url = '$baseUrl/api/v1/configuration/action-categories';
    final response = await http.get(
      Uri.parse(url),
      headers: _headers,
    );

    if (response.statusCode == 200) {
      final json = jsonDecode(response.body) as Map<String, dynamic>;
      return ActionCategoriesResponse.fromJson(json);
    } else {
      throw Exception('Failed to load action categories: ${response.statusCode}');
    }
  }

  /// Fetch all action templates
  Future<Map<String, ActionTemplate>> getActionTemplates() async {
    final url = '$baseUrl/api/v1/configuration/action-types';
    final response = await http.get(
      Uri.parse(url),
      headers: _headers,
    );

    if (response.statusCode == 200) {
      final json = jsonDecode(response.body) as Map<String, dynamic>;
      final actionTypesMap = json['action_types'] as Map<String, dynamic>;

      return actionTypesMap.map((key, value) {
        final templateJson = value as Map<String, dynamic>;
        templateJson['action_name'] = key; // Add action name to the template
        return MapEntry(key, ActionTemplate.fromJson(templateJson));
      });
    } else {
      throw Exception('Failed to load action templates: ${response.statusCode}');
    }
  }

  /// Fetch a specific action template by name
  Future<ActionTemplate> getActionTemplate(String actionName) async {
    final url = '$baseUrl/api/v1/configuration/action-types/$actionName';
    final response = await http.get(
      Uri.parse(url),
      headers: _headers,
    );

    if (response.statusCode == 200) {
      final json = jsonDecode(response.body) as Map<String, dynamic>;
      return ActionTemplate.fromJson(json);
    } else if (response.statusCode == 404) {
      throw Exception('Action template "$actionName" not found');
    } else {
      throw Exception('Failed to load action template: ${response.statusCode}');
    }
  }
}