import { WSQuery } from '../types'

// Returns the current UTC time in the format
// YYYY-MM-DD HH:MM:SS
const getCurrentTimeString = () => {
    const now = new Date()
    const formatter = new Intl.DateTimeFormat('en-US', {
        year: 'numeric',
        month: '2-digit',
        day: '2-digit',
        hour: '2-digit',
        minute: '2-digit',
        second: '2-digit',
        hour12: false,
        timeZone: 'UTC',
    })
    return formatter.format(now).replace(',', '')
}

// Convert miles per hour to kilometers per hour
const mphToKph = (mph: string) => (parseFloat(mph) * 1.60934).toFixed(1)

// Convert Fahreneheit to Celsius
const fToC = (f: string) => (((parseFloat(f) - 32) * 5) / 9).toFixed(1)

// Convert inches Hg to hectopascal
const inHgTohPa = (inHg: string) => (parseFloat(inHg) * 33.8639).toFixed(1)

// Convert inches to mm
const inchToCm = (inch: string) => (parseFloat(inch) * 25.4).toFixed(1)

// Calculate the wet bulb temperature
//
const wetbulbtemperature = (tempf: string, humidity: string) => {
    const T = ((parseFloat(tempf) - 32) * 5) / 9
    const RH = parseFloat(humidity)
    return (
        T * Math.atan(0.151977 * Math.sqrt(RH + 8.313659)) +
        Math.atan(T + RH) -
        Math.atan(RH - 1.676331) +
        0.00391838 * Math.pow(RH, 1.5) * Math.atan(0.023101 * RH) -
        4.686035
    ).toFixed(2)
}

const transformData = (
    params: Omit<WSQuery, 'action' | 'ID' | 'PASSWORD' | 'realtime' | 'rtfreq'>
) => ({
    ...params,
    dateutc: params.dateutc === 'now' ? getCurrentTimeString() : params.dateutc,
    windspeedkph: mphToKph(params.windspeedmph),
    windgustkph: mphToKph(params.windgustmph),
    tempc: fToC(params.tempf),
    dewptc: fToC(params.dewptf),
    baromhpa: inHgTohPa(params.baromin),
    rainmm: inchToCm(params.rainin),
    dailyrainmm: inchToCm(params.dailyrainin),
    indoortempc: fToC(params.indoortempf),
    wetbulbtemperature: wetbulbtemperature(params.tempf, params.humidity),
})

export default transformData