import { HttpClient } from '@angular/common/http';
import { inject, Injectable } from '@angular/core';
import { BehaviorSubject, Observable } from 'rxjs';
import { IUser } from '../model/interface/user.interface';
import { IKey } from '../model/interface/key.interface';
import { ICylinder } from '../model/interface/cylinder.interface';
import { HotToastService } from '@ngxpert/hot-toast';

@Injectable({
  providedIn: 'root'
})
export class ApiService {
  private http: HttpClient = inject(HttpClient);
  private toast: HotToastService = inject(HotToastService);

  public keys: BehaviorSubject<IKey[]> = new BehaviorSubject<IKey[]>([]);
  public cylinders: BehaviorSubject<ICylinder[]> = new BehaviorSubject<ICylinder[]>([]);



  constructor() { }


  getAllUsers(): Observable<IUser[]> {
    return this.http.get<IUser[]>('/api/user');
  }

  saveUser(user: IUser) {
    return this.http.post('/api/user', user);
  }

  getRoles(): Observable<{id: string, name: string}[]> {
    return this.http.get<{id: string, name: string}[]>('/api/role');
  }

  private getKeys(): Observable<IKey[]> {
    return this.http.get<IKey[]>('api/key')
  }

  refreshKeys(): void{
    this.getKeys().subscribe({
      next: keys => {
        this.keys.next(keys);
      },
      error: () => {
        this.toast.error('Fehler beim Laden der Schlüssel')
      }
    })
  }

  getLostKeys(): Observable<IKey[]> {
    return this.http.get<IKey[]>('api/key/lost')
  }

  updateKey(key: IKey): Observable<IKey> {
    return this.http.put<IKey>('api/key', key);
  }

  createKey(key: any) {
    return this.http.post<IKey>('api/key', key);
  }

  createSystem(keySystem: any) {
    return this.http.post('api/system', keySystem);
  }

  getSystems(): Observable<any[]> {
    return this.http.get<any[]>('api/system');
  }

  getSystemManagers(id: string): Observable<IUser[]> {
    return this.http.get<any[]>(`api/system/${id}/manager`);
  }

  handoverKey(data: any) {
    return this.http.post(`api/key/${data.key.id}/handover`, data);
  }

  getHandovers(keyID: string): Observable<any[]> {
    return this.http.get<any[]>(`api/key/${keyID}/handover`);
  }

  createCustomer(data: { name: string, system: any}) {
    return this.http.post('api/customer', data);
  }

  getCustomers(): Observable<any[]> {
    return this.http.get<any[]>('api/customer')
  }

  deleteKey(id: string) {
    return this.http.delete(`api/key/${id}`);
  }

  getKeyArchive(): Observable<IKey[]> {
    return this.http.get<IKey[]>('api/key/archive');
  }

  restoreKey(id: string) {
    return this.http.put(`api/key/${id}/restore`, null);
  }

  private getCylinders(): Observable<ICylinder[]> {
    return this.http.get<ICylinder[]>('api/cylinder');
  }

  /**
   * Aktualisiert die Zylinder im Behaviour Subject
   * cylinders
   * @returns Promise wenn geladen
   */
  refreshCylinders(): Promise<void> {
    return new Promise<void>(resolve => {
      this.getCylinders().subscribe({
      next: data => {
        this.cylinders.next(data);
      },
      error: () => {
        this.toast.error('Fehler beim Laden der Zylinder')
      },
      complete: () => resolve()
    })
    })
  }

  deleteCylinder(cylinder: ICylinder): Observable<any> {
    return this.http.delete(`api/cylinder/${cylinder.id}`)
  }

  deleteUser(id: string) {
    return this.http.delete(`api/user/${id}`)
  }

  addManager(systemID: string, email: string): Observable<IUser[]> {
    return this.http.post<IUser[]>(`api/system/${systemID}/manager`, {
      email,
      action: 'add'
    });
  }

  removeManager(systemID: string, email: string): Observable<IUser[]> {
    return this.http.post<IUser[]>(`api/system/${systemID}/manager`, {
      email,
      action: 'remove'
    });
  }

  getStats(): Observable<{ keys: number, cylinders: number, systems: number, handedOut: number }> {
    return this.http.get<{ keys: number, cylinders: number, systems: number, handedOut: number }>('api/user/stats');
  }

  getActivities(): Observable<any[]> {
    return this.http.get<any[]>('api/user/activities');
  }

  createCylinder(data: any) {
    return this.http.post<ICylinder>('api/cylinder', data);
  }

  getSettings(): Observable<any> {
    return this.http.get('api/user/settings')
  }

  updateSettings(settings: any): Observable<any> {
    return this.http.post('api/user/settings', settings)
  }
}