const btn = document.getElementById("button")
btn.addEventListener('click', onButtonClick)
const outputContainer = document.getElementById('output-container')

const people = ["Alice", "Bob", "Carly", "Dan", "Ed", "Ferdinand", "Ginny"]
let secretSantaPairs = {}

function generateSecretSantaPairs(participantsList) {
    //Your code here
    // let secretSantaPairs = {}

    for (let i = 0; i < participantsList.length; i++) {
        //creating a copy of the array to avoid modifying the original
        let allParticipants = [...participantsList]
        console.log("allParticipants: " + allParticipants)
        
        //removing the person that was paired with Santa, but returning the array, not the person 
        //slice(0, i) captures elements before the current participant
        //slice(i + 1) captures elements after the current participant
        let remainingParticipants = allParticipants.slice(0, i).concat(allParticipants.slice(i + 1))
        // storing (for my sake), logging the participant that was paired w/Santa / removed from the array 
        let removedParticipant = allParticipants[i];
        console.log("remainingParticipants: " + remainingParticipants)
        console.log("selected participant for Santa: " + removedParticipant)

        let randomIndex = Math.floor(Math.random() * remainingParticipants.length)
        let selectedSanta = remainingParticipants[randomIndex]
        console.log("selectedSanta: " + selectedSanta)

        secretSantaPairs[participantsList[i]] = selectedSanta
        console.log("selectedSanta in object: " + selectedSanta)
    }
    return secretSantaPairs
}

function onButtonClick() {
    generateSecretSantaPairs(people)
    outputContainer.innerHTML = '' //clear
    
    //creating a new paragraph for each key-value pair in the object
    for (const [key, value] of Object.entries(secretSantaPairs)) {
        const paragraph = document.createElement("p")
        paragraph.textContent = `${key} is the Secret Santa for ${value}`
        outputContainer.appendChild(paragraph)
    }
}




// console.log(generateSecretSantaPairs(people))
/**
Example output:
{
    Alice: "Dan",
    Bob: "Ferdinand",
    Carly: "Ed",
    Dan: "Alice",
    Ed: "Ginny",
    Ferdinand: "Bob",
    Ginny: "Carly"
}
 */