import React, {Component} from 'react';
 
 
class App extends Component {
 
    constructor(props){
        super(props)
        this.onHandleUsers = this.onHandleUsers.bind(this)
        this.tekstas = "a";
     
        this.state = {
            isLoaded: false,
            users: []
        }
    }
     
     
     
     
    handleUserChange = (e) => {
        const {value} = e.target
        this.onHandleCurrentUsers(value)
        this.tekstas = this.onHandleCurrentUsers(value)
     
      }
     
    onHandleUsers() {
        fetch("http://localhost:3000/api/users")
        .then(res => res.json())
        .then(result => {
            this.setState({
                isLoaded: true,
                users: result
            })
        })
        .catch(e => console.log(e))
    }
     
    onHandleCurrentUsers(userId) {
        const data = {userId: userId}
        fetch("http://localhost:3000/api/user", {
            method: 'POST',
            headers: { "Content-Type": "application/json"},
            body: JSON.stringify(data)
        })
        .then(res => res.json())
        .then(result => {
            this.setState({
                isLoaded: false,
                currentUser: result
            })
        })
        .catch(e => console.log(e))
    }
     
     
     
     
    render() {
        const {currentUser} = this.state
        return (
            <div>
                 
                <div>
                    {
                        currentUser && <div>{currentUser.name} {currentUser.surname}</div>
                    }
                </div>
                <div>
                   
                <form onSubmit={this.handleUserChange}>
            <label>
                <input
            name="userId"
            type="number"
            //value={this.handleUserChange}
            onChange={this.handleUserChange} 
            />
            </label>
                <input type="submit" value="Submit" />
                    
                    </form>
                    {this.tekstas}
                 </div>
     
                    <div> </div>  
        </div>
     
        )
    }
    }
     
     
    export default App