import React from "react"
import Die from "./Die"
import {nanoid} from "nanoid"

export default function App() {

    const [dice, setDice] = React.useState(allNewDice())
    
    function allNewDice() {
        const newDice = []
        for (let i = 0; i < 10; i++) {
            newDice.push({
                value: Math.ceil(Math.random() * 6),
                isHeld: false,
                id: nanoid()
            })
        }
        return newDice
    }
    
/**
 * Challenge: Update the `rollDice` function to not just roll
 * all new dice, but instead to look through the existing dice
 * to NOT role any that are being `held`.
 * 
 * Hint: this will look relatively similiar to the `holdDice`
 * function below. When creating new dice, remember to use
 * `id: nanoid()` so any new dice have an `id` as well.
 */
    function rollDice() {
        setDice(allNewDice())
    }
    
    function holdDice(id) {
        setDice(oldDice => oldDice.map(die => {
            return die.id === id ? 
                {...die, isHeld: !die.isHeld} :
                die
        }))
    }
    
    const diceElements = dice.map(die => (
        <Die 
            key={die.id} 
            value={die.value} 
            isHeld={die.isHeld} 
            holdDice={() => holdDice(die.id)}
        />
    ))
    
    return (
        <main>
            <div className="dice-container">
                {diceElements}
            </div>
            <button className="roll-dice" onClick={rollDice}>Roll</button>
        </main>
    )
}