function isIPv4(token){
    return /^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$/.exec(token) !== null
}

function isTeXR(token){
    return !isNokIn(token) && (/^.*\/.*\/.*\/.*$/.exec(token) !== null || (/^.*$/.exec(token) && !isIPv4(token)))
}

function isNokIn(token){
    return /^INT.*/.exec(token) !== null
}

function getInt(tokens){
    console.log(tokens)
    //NOK
    if (isNokIn(tokens[0])) return {int:tokens[0],v:'NOK'}
    //IOS
    if (tokens.length === 6 && isTeXR(tokens[0])) return {int:tokens[0],v:'IOS'}
    if (tokens.length === 9 && isTeXR(tokens[0])) return {int:tokens[0],v:'IOS'}
    if (tokens.length === 8 && isTeXR(tokens[0]) && tokens[5] === 'interface') return {int:tokens[0],v:'IOS'}
    if (tokens.length === 7 && isIPv4(tokens[0]) && isTeXR(tokens[6])) return {int:tokens[6],v:'IOS'}
    if (tokens.length === 5 && isTeXR(tokens[0])) return {int:tokens[0],v:'IOS'}
    return undefined
}

function getILockOutput(i,prev){
    console.log(i)
    if (i.v === 'IOS'){
        if (prev !== null && prev.v === 'IOS'){
            return `interface `+i.int+`
shutdown
!
`}
        else {
            return `configure t
interface `+i.int+`
shutdown
!
`}
    }
    else if(i.v === 'NOK'){
        if (prev !== null && prev.v === 'IOS'){
        return `end
configure service ies 3000 interface "` + i.int+ `" shutdown
`}else{
        return `configure service ies 3000 interface "` + i.int+ `" shutdown
        `}
    }
}
function getIUnlockOutput(i,prev){
    if (i.v === 'IOS'){
        if (prev !== null && prev.v === 'IOS'){
            return `interface `+i.int+`
no shutdown
!
`
}
        else {
            return `configure t
interface `+i.int+`
no shutdown
!
`}
    }else if(i.v === 'NOK'){
        if (prev !== null && prev.v === 'IOS'){
        return `end
configure service ies 3000 interface "` + i.int+ `" no shutdown
`}else{
        return `configure service ies 3000 interface "` + i.int+ `" no shutdown
        `}
    }
}


function parseInput(input,l){
    let output = ""
    let lines = input.trim().split('\n')
    let prev = null
    lines.forEach(element => {
        let tokens = element.trim().split(/[\t ]+/)
        i = getInt(tokens)
        if (l === 'l') output+=getILockOutput(i,prev)
        else output+=getIUnlockOutput(i,prev)
        prev = i
    })
    if (prev.v === 'IOS') output+='end\n'
    return output
}

function convert(l){
    document.getElementById('out').value = parseInput(document.getElementById('in').value,l)
}