Final Exam 01.Concert

function solve(input) {


    const bandMembers = new Map();
    function saveBandsAndMembers(band, members) {
        if (!bandMembers.has(band)) {
            bandMembers.set(band, {
                members: new Set(members)
            });
        } else {
            const currentValue = bandMembers.get(band);
            const currentMembers = Array.from(currentValue.members || []);
            const newMembers = currentMembers.concat(members); ///[...currentMembers, ...members];
            bandMembers.set(band, {
                ...currentValue,
                members: new Set(newMembers)
            });
        }
    }

    function addBandTime(band, time) {
        if (bandMembers.has(band)) {
            const value = bandMembers.get(band);
            const members = value.members;
            const currentTime = value.time;
            bandMembers.set(band, {
                members,
                time: (currentTime || 0) + time
            });
        } else {
            bandMembers.set(band, {
                time
            });
        }
    }

    function getTotalTime() {
        let totalTime = 0;
        for (const [, value] of bandMembers.entries()) {
            const { time } = value;
            totalTime += time;
        }
        return totalTime;
    }

    function sortBandByTimePlayed() {
        const sortedBands = new Map([...bandMembers.entries()].sort((a, b) => b[1].time - a[1].time || a[0].localeCompare(b[0])));
        return sortedBands;
    }

    function logBandAndTimePlayed(bands) {
        for (const [band, value] of bands.entries()) {
            console.log(`${band} -> ${value.time}`);
        }
    }

    function logBandAndMembers(band) {
        console.log(band);
        const { members } = bandMembers.get(band);
        for (const member of members) {
            console.log(`=> ${member}`);
        }
    }
    let bandToLog = input[input.length - 1];
    for (let line of input) {
        if (line === 'start of concert') {
            break;
        }
        let [command, band, otherParams] = line.split('; ');
        if (command === 'Play') {
            let playTime = parseInt(otherParams);
            addBandTime(band, playTime);

        } else if (command === 'Add') {
            let members = otherParams.split(', ');
            saveBandsAndMembers(band, members);
        }
    }
    const totalTime = `Total time: ${getTotalTime()}`;
    console.log(totalTime);
    const sortedBands = sortBandByTimePlayed();
    logBandAndTimePlayed(sortedBands);
    logBandAndMembers(bandToLog);

}