task_1

function horse_racing(data) {
    let horse_positions = data.shift().split('|')
    data.pop()
    for (const line of data) {
        let command_data = line.split(' ')
        let command = command_data[0]
        if (command === 'Retake') {
            let overtaking_horse = command_data[1]
            let overtaken_horse = command_data[2]
            let overtaking_index = horse_positions.indexOf(overtaking_horse)
            let overtaken_index = horse_positions.indexOf(overtaken_horse);
            [horse_positions[overtaking_index], horse_positions[overtaken_index]] = [horse_positions[overtaken_index], horse_positions[overtaking_index]]
            console.log(`${overtaking_horse} retakes ${overtaken_horse}.`)
        }
        else if (command === 'Trouble') {
            let trouble_horse = command_data[1]

            if (horse_positions.indexOf(trouble_horse) !== 0) {
                let horse_index = horse_positions.indexOf(trouble_horse);
                [horse_positions[horse_index], horse_positions[horse_index + 1]] = [horse_positions[horse_index + 1], horse_positions[horse_index]]
                console.log(`Trouble for ${trouble_horse} - drops one position.`)
            }
        }
        else if (command === 'Rage') {
            let rage_horse = command_data[1]
            let horse_index = horse_positions.indexOf(rage_horse)
            if (horse_index === horse_positions[horse_positions.length - 2]) {
                let current_horse = horse_positions.splice(horse_index, 1)
                horse_positions.push(current_horse);
            } else if (horse_index < 1) {
                [horse_positions[horse_index], horse_positions[horse_index - 2]] = [horse_positions[horse_index - 2], horse_positions[horse_index]]
            }
            console.log(`${rage_horse} rages 2 positions ahead.`)
        }
        else if (command === 'Miracle') {
            let last_horse = horse_positions.shift()
            horse_positions.push(last_horse)
            console.log(`What a miracle - ${last_horse} becomes first.`)
        }
    }
    console.log(horse_positions.join('->'))
    console.log(`The winner is: ${horse_positions[horse_positions.length - 1]}`)
}

horse_racing(['Onyx|Domino|Sugar|Fiona',
    'Trouble Onyx',
    'Retake Onyx Sugar',
    'Rage Domino',
    'Miracle',
    'Finish'])