const DATA_SIZE  = 60 * 60 * 12 // every second for 12 hours
const adjectives = 'autumn hidden smiling bitter misty'.split(' ')
const nouns      = 'waterfall river carefully breeze moon rain'.split(' ')

const getRandomNumber = limit => (Math.random() * limit).toFixed(4) * 1

function insertData(left, right, coll) {
    print(`inserting: ${left}-${right} `)
    coll.insert({
        serverName : `${left}-${right}`,
        hostName   : `${left}${right}.local`,
        eventName  : right,
        data       : generateRandomData(DATA_SIZE)
    })
}

function generateRandomData(size) {
    var temp = []
    for(let i = 0; i < size; i++ ) {
        temp.push({
            ts : new Date().getTime() + i,
            v  : i + getRandomNumber(1000)
        })
    }
    return temp
}

function populateCollection(coll) {
    coll.drop()
    coll.createIndex({serverName: 1, eventName: 1})
    adjectives.forEach(adj => nouns.forEach(noun => insertData(adj, noun, coll)))
}

populateCollection(db.iot)

print('Enjoy!')