import { Injectable } from '@angular/core';
import { Guid } from 'guid-typescript';
import { User } from '../../models/identity/user.model';
import { FormGroup } from '@angular/forms';
import { AppConstants } from 'src/app/app-constants.module';
import { HttpClient, HttpHeaders, HttpParams } from '@angular/common/http';
import { Observable } from 'rxjs';
import { Role } from 'src/models/identity/role.model';
import { Friend } from 'src/models/identity/friend.model';
import { TokenService } from './token.service';
import { Language } from 'src/models/language.model';
import { Technology } from 'src/models/technology.model';

@Injectable({
  providedIn: 'root'
})
export class UserService {
  constructor(private _http: HttpClient, private _tokenService: TokenService)
  { }

  getDefaultUser(): User {
    return new User(Guid.createEmpty(), '', '', '', '', AppConstants.FALLBACK_PROFILE_ICON, [], [], [], []);
  }

  /* Requests from session storage */

  getUserFromSessionStorageRequest(): Observable<object> {
    const userId = this._tokenService.getUserIdFromSessionStorageToken();
    const token = this._tokenService.getTokenFromSessionStorage();

    return this.getUserRequest(userId, token);
  }

  addFriendToUserFromSessionStorageRequest(newFriendUserName: string): Observable<object> {
    const userUserName = this._tokenService.getUsernameFromSessionStorageToken();
    const token = this._tokenService.getTokenFromSessionStorage();

    return this.addFriendToUserRequest(userUserName, token, newFriendUserName);
  }

  putUserFromSessionStorageRequest(updateUserFormGroup: FormGroup, languages: Language[], technologies: Technology[], userRoles: Role[], userFriends: Friend[]): Observable<object> {
    const userId = this._tokenService.getUserIdFromSessionStorageToken();
    const token = this._tokenService.getTokenFromSessionStorage();

    return this.putUserRequest(userId, token, updateUserFormGroup, languages, technologies, userRoles, userFriends);
  }

  putProfilePictureFromSessionStorageRequest(newPicture: File): Observable<object> {
    const userId = this._tokenService.getUserIdFromSessionStorageToken();
    const token = this._tokenService.getTokenFromSessionStorage();

    return this.putProfilePictureRequest(userId, token, newPicture);
  }

  putBareUserFromSessionStorageRequest(user: User, password: string): Observable<object> {
    const userId = this._tokenService.getUserIdFromSessionStorageToken();
    const token = this._tokenService.getTokenFromSessionStorage();

    return this.putBareUserRequest(userId, token, user, password);
  }

  deleteUserFromSessionStorageRequest(): Observable<object> {
    const userId = this._tokenService.getUserIdFromSessionStorageToken();
    const token = this._tokenService.getTokenFromSessionStorage();

    return this.deleteUserRequest(userId, token);
  }

  removeFriendFromUserFromSessionStorageRequest(friendToRemoveUserName: string): Observable<object> {
    const userUserName = this._tokenService.getUsernameFromSessionStorageToken();
    const token = this._tokenService.getTokenFromSessionStorage();

    return this.removeFriendFromUserRequest(userUserName, token, friendToRemoveUserName);
  }


  /* User requests */

  loginUserRequest(loginUserFormGroup: FormGroup): Observable<object> {
    const body = {
      UserName: loginUserFormGroup.get('username')?.value,
      Password: loginUserFormGroup.get('password')?.value
    };
    return this._http.post(AppConstants.API_USER_LOGIN_URL, body);
  }

  registerUserRequest(registerUserFormGroup: FormGroup): Observable<object> {
    const body = {
      UserName: registerUserFormGroup.get('username')?.value,
      Email: registerUserFormGroup.get('email')?.value,
      FirstName: registerUserFormGroup.get('firstName')?.value,
      LastName: registerUserFormGroup.get('lastName')?.value,
      Password: registerUserFormGroup.get('password')?.value
    };
    return this._http.post(AppConstants.API_USER_REGISTER_URL, body);
  }

  addFriendToUserRequest(userUserName: string, authToken: string, newFriendUserName: string): Observable<object> {
    const body = {
      newFriendUserName: newFriendUserName
    };
    const options = {
      params: new HttpParams().set('UserName', userUserName),
      headers: new HttpHeaders().set('Authorization', 'Bearer ' + authToken)
    };
    return this._http.put(AppConstants.API_USER_URL + '/AddFriend', body, options);
  }

  getUserRequest(userId: Guid, authToken: string): Observable<object> {
    const options = {
      params: new HttpParams().set('Id', userId.toString()),
      headers: new HttpHeaders().set('Authorization', 'Bearer ' + authToken)
    };
    return this._http.get(AppConstants.API_USER_URL, options);
  }

  getUserByUsernameRequest(username: string): Observable<object> {
    const options = {
      params: new HttpParams().set('UserName', username),
    };
    return this._http.get(AppConstants.API_USER_URL + '/GetUser', options);
  }

  putUserRequest(userId: Guid, authToken: string, updateUserFormGroup: FormGroup, languages: Language[], technologies: Technology[], userRoles: Role[], userFriends: Friend[]): Observable<object> {
    const body = {
      UserName: updateUserFormGroup.get('username')?.value,
      Email: updateUserFormGroup.get('email')?.value,
      FirstName: updateUserFormGroup.get('firstName')?.value,
      LastName: updateUserFormGroup.get('lastName')?.value,
      Password: updateUserFormGroup.get('password')?.value,
      Roles: userRoles,
      Friends: userFriends,
      Languages: languages,
      Technologies: technologies
    };
    const options = {
      params: new HttpParams().set('Id', userId.toString()),
      headers: new HttpHeaders().set('Authorization', 'Bearer ' + authToken)
    };
    return this._http.put(AppConstants.API_USER_URL, body, options);
  }

  putBareUserRequest(userId: Guid, authToken: string, user: User, password: string): Observable<object> {
    const body: object = user;
    Object.assign(body, { password: password });
    const options = {
      params: new HttpParams().set('Id', userId.toString()),
      headers: new HttpHeaders().set('Authorization', 'Bearer ' + authToken)
    };
    return this._http.put(AppConstants.API_USER_URL, body, options);
  }

  putProfilePictureRequest(userId: Guid, authToken: string, newPicture: File): Observable<object> {
    const form = new FormData();
    form.append('picture', newPicture);
    const options = {
      params: new HttpParams().set('UserId', userId.toString()),
      headers: new HttpHeaders().set('Authorization', 'Bearer ' + authToken)
    };
    return this._http.put(AppConstants.API_USER_URL + '/ProfilePicture', form, options);
  }

  deleteUserRequest(userId: Guid, authToken: string): Observable<object> {
    const options = {
      params: new HttpParams().set('Id', userId.toString()),
      headers: new HttpHeaders().set('Authorization', 'Bearer ' + authToken)
    };
    return this._http.delete(AppConstants.API_USER_URL, options);
  }

 removeFriendFromUserRequest(userUserName: string, authToken: string, friendToRemoveUserName: string): Observable<object> {
    const body = {
      friendUserNameToRemove: friendToRemoveUserName
    };
    const options = {
      params: new HttpParams().set('UserName', userUserName),
      headers: new HttpHeaders().set('Authorization', 'Bearer ' + authToken)
    };
    return this._http.post(AppConstants.API_USER_URL + '/RemoveFriend', body, options);
  }
}