import { Injectable } from '@angular/core';
import { HttpClient, HttpErrorResponse } from '@angular/common/http';
import { Observable, catchError, tap, throwError } from 'rxjs';
import { environment } from '../../environments/environment';

export interface SavedPassword {
  _id: string;
  userId: string;
  description: string;
  password: string;
  createdAt: Date;
}

export interface SavePasswordRequest {
  description: string;
  password: string;
}

@Injectable({
  providedIn: 'root'
})
export class PasswordService {
  private readonly API_URL = `${environment.apiUrl}/passwords`;

  constructor(private http: HttpClient) {}

  private handleError(error: HttpErrorResponse) {
    let errorMessage = 'An unknown error occurred';

    if (error.error instanceof ErrorEvent) {
      // Client-side error
      errorMessage = error.error.message;
    } else {
      // Backend error
      if (error.error?.message) {
        errorMessage = error.error.message;
      } else if (typeof error.error === 'string') {
        // Try to parse HTML error message
        const match = error.error.match(/<pre>([^<]+)<\/pre>/);
        if (match) {
          errorMessage = match[1].split('<br>')[0];
        } else {
          errorMessage = error.error;
        }
      } else {
        errorMessage = `Server error: ${error.status}`;
      }
    }

    console.error('Error details:', {
      message: errorMessage,
      status: error.status,
      error: error.error
    });

    return throwError(() => ({ message: errorMessage, originalError: error }));
  }

  getPasswords(): Observable<SavedPassword[]> {
    return this.http.get<SavedPassword[]>(this.API_URL).pipe(
      catchError(this.handleError)
    );
  }

  savePassword(data: SavePasswordRequest): Observable<SavedPassword> {
    return this.http.post<SavedPassword>(this.API_URL, data).pipe(
      catchError(this.handleError)
    );
  }

  deletePassword(id: string): Observable<void> {
    return this.http.delete<void>(`${this.API_URL}/${id}`).pipe(
      catchError(this.handleError)
    );
  }

  updatePassword(id: string, data: SavePasswordRequest): Observable<SavedPassword> {
    return this.http.put<SavedPassword>(`${this.API_URL}/${id}`, data).pipe(
      catchError(this.handleError)
    );
  }
}