import 'package:appwrite/appwrite.dart';
import 'package:appwrite/models.dart';
import 'package:ltx_flutter/constants/constants.dart';
import 'package:ltx_flutter/constants/colors.dart';
import 'package:flutter/material.dart';

class Category {
  late final Color backgroundColor;
  late final Color foregroundColor;
  late final num number;
  late final num? parent;
  late final String name;
  late final String? description;

  Category(Document doc) {
    backgroundColor = _getBackgroundColor(doc.data['color']);
    foregroundColor = _getForegroundColor(doc.data['color']);
    number = doc.data['number'];
    parent = doc.data['parent'];
    name = doc.data['name'];
    description = doc.data['description'];
  }

  Color _getBackgroundColor(String colorStr) {
    return Color(int.parse("0xff$colorStr"));
  }

  Color _getForegroundColor(String colorStr) {
    return Color(int.parse("0xff$colorStr")).computeLuminance() > 0.5
        ? Colors.black
        : Colors.white;
  }

  bool hasParent() {
    return parent == number ? false : true;
  }

  double leftPadding() {
    return hasParent() ? 50.0 : 20.0;
  }
}

class CategoriesAPI extends ChangeNotifier {
  Client client = Client();
  late final Account account;
  late final Databases databases;
  late List<Document> _categories = [];

  // Constructor
  CategoriesAPI() {
    init();
    getCategories();
  }

  // Getters
  get total => _categories.length;
  get all => _categories;
  get isEmpty => _categories.isEmpty;
  get(n) => Category(_categories[n]);
  get colors => CategoryColor.values;

  init() {
    client.setEndpoint(APPWRITE_URL).setProject(APPWRITE_PROJECT_ID);
    account = Account(client);
    databases = Databases(client);
  }

  getCategories() async {
    print("Updating categories.");
    _categories = [];
    var response = await databases.listDocuments(
        databaseId: CATEGORIES_DB,
        collectionId: COLLECTION,
        queries: [
          Query.orderAsc("parent"),
          Query.orderAsc("number"),
        ]);
    _categories = response.documents;
    notifyListeners();
  }

  Future<Document>? addCategory({
    required String name,
    required double number,
    required String color,
    String? description,
    int? parentId,
  }) async {
    try {
      return await databases.createDocument(
          databaseId: CATEGORIES_DB,
          collectionId: COLLECTION,
          documentId: "category-${number.toString()}",
          data: {
            'name': name,
            'number': number,
            'color': color,
            'parent': parentId,
            'description': description,
          });
    } catch (e) {
      print(e);
      throw "Didn't work";
    } finally {
      notifyListeners();
    }
  }

  Future<dynamic> deleteCategory({required double number}) {
    return databases.deleteDocument(
        databaseId: CATEGORIES_DB,
        collectionId: COLLECTION,
        documentId: "category-${number.toString()}");
  }
}