import { Component, linkEvent } from 'inferno';
import { Subscription } from "rxjs";
import { retryWhen, delay, take } from 'rxjs/operators';
import { LoginForm, RegisterForm, LoginResponse, UserOperation } from '../interfaces';
import { WebSocketService, UserService } from '../services';
import { msgOp } from '../utils';

interface State {
  loginForm: LoginForm;
  registerForm: RegisterForm;
}

let emptyState: State = {
  loginForm: {
    username_or_email: undefined,
    password: undefined
  },
  registerForm: {
    username: undefined,
    password: undefined,
    password_verify: undefined
  }
}

export class Login extends Component<any, State> {
  private subscription: Subscription;

  constructor(props, context) {
    super(props, context);

    this.state = emptyState;

    this.subscription = WebSocketService.Instance.subject
      .pipe(retryWhen(errors => errors.pipe(delay(3000), take(10))))
      .subscribe(
        (msg) => this.parseMessage(msg),
        (err) => console.error(err),
        () => console.log("complete")
      );
  }

  componentWillUnmount() {
    this.subscription.unsubscribe();
  }

  render() {
    return (
      <div class="container">
        <div class="row">
          <div class="col-12 col-lg-6 mb-4">
            {this.loginForm()}
          </div>
          <div class="col-12 col-lg-6">
            {this.registerForm()}
          </div>
        </div>
      </div>
    )
  }

  loginForm() {
    return (
      <div>
        <form onSubmit={linkEvent(this, this.handleLoginSubmit)}>
          <h4>Login</h4>
          <div class="form-group row">
            <label class="col-sm-2 col-form-label">Email or Username</label>
            <div class="col-sm-10">
              <input type="text" class="form-control" value={this.state.loginForm.username_or_email} onInput={linkEvent(this, this.handleLoginUsernameChange)} required minLength={3} />
            </div>
          </div>
          <div class="form-group row">
            <label class="col-sm-2 col-form-label">Password</label>
            <div class="col-sm-10">
              <input type="password" value={this.state.loginForm.password} onInput={linkEvent(this, this.handleLoginPasswordChange)} class="form-control" required />
            </div>
          </div>
          <div class="form-group row">
            <div class="col-sm-10">
              <button type="submit" class="btn btn-secondary">Login</button>
            </div>
          </div>
        </form>
        Forgot your password or deleted your account? Reset your password. TODO
      </div>
    );
  }
  registerForm() {
    return (
      <form onSubmit={linkEvent(this, this.handleRegisterSubmit)}>
        <h4>Sign Up</h4>
        <div class="form-group row">
          <label class="col-sm-2 col-form-label">Username</label>
          <div class="col-sm-10">
            <input type="text" class="form-control" value={this.state.registerForm.username} onInput={linkEvent(this, this.handleRegisterUsernameChange)} required minLength={3} />
          </div>
        </div>
        <div class="form-group row">
          <label class="col-sm-2 col-form-label">Email</label>
          <div class="col-sm-10">
            <input type="email" class="form-control" value={this.state.registerForm.email} onInput={linkEvent(this, this.handleRegisterEmailChange)} minLength={3} />
          </div>
        </div>
        <div class="form-group row">
          <label class="col-sm-2 col-form-label">Password</label>
          <div class="col-sm-10">
            <input type="password" value={this.state.registerForm.password} onInput={linkEvent(this, this.handleRegisterPasswordChange)} class="form-control" required />
          </div>
        </div>
        <div class="form-group row">
          <label class="col-sm-2 col-form-label">Verify Password</label>
          <div class="col-sm-10">
            <input type="password" value={this.state.registerForm.password_verify} onInput={linkEvent(this, this.handleRegisterPasswordVerifyChange)} class="form-control" required />
          </div>
        </div>
        <div class="form-group row">
          <div class="col-sm-10">
            <button type="submit" class="btn btn-secondary">Sign Up</button>
          </div>
        </div>
      </form>
    );
  }

  handleLoginSubmit(i: Login, event) {
    event.preventDefault();
    WebSocketService.Instance.login(i.state.loginForm);
  }

  handleLoginUsernameChange(i: Login, event) {
    i.state.loginForm.username_or_email = event.target.value;
    i.setState(i.state);
  }

  handleLoginPasswordChange(i: Login, event) {
    i.state.loginForm.password = event.target.value;
    i.setState(i.state);
  }

  handleRegisterSubmit(i: Login, event) {
    event.preventDefault();
    WebSocketService.Instance.register(i.state.registerForm);
  }

  handleRegisterUsernameChange(i: Login, event) {
    i.state.registerForm.username = event.target.value;
    i.setState(i.state);
  }

  handleRegisterEmailChange(i: Login, event) {
    i.state.registerForm.email = event.target.value;
    i.setState(i.state);
  }

  handleRegisterPasswordChange(i: Login, event) {
    i.state.registerForm.password = event.target.value;
    i.setState(i.state);
  }

  handleRegisterPasswordVerifyChange(i: Login, event) {
    i.state.registerForm.password_verify = event.target.value;
    i.setState(i.state);
  }

  parseMessage(msg: any) {
    let op: UserOperation = msgOp(msg);
    if (msg.error) {
      alert(msg.error);
      return;
    } else {
      if (op == UserOperation.Register || op == UserOperation.Login) {
        let res: LoginResponse = msg;
        UserService.Instance.login(msg);
        this.props.history.push('/');
      }
    }
  }
}