export function mktime(
  hour?: number | string,
  minute?: number | string,
  second?: number | string,
  month?: number | string,
  day?: number | string,
  year?: number | string,
): number | false {
  //  discuss at: https://locutus.io/php/mktime/
  // original by: Kevin van Zonneveld (https://kvz.io)
  // improved by: baris ozdil
  // improved by: Kevin van Zonneveld (https://kvz.io)
  // improved by: FGFEmperor
  // improved by: Brett Zamir (https://brett-zamir.me)
  //    input by: gabriel paderni
  //    input by: Yannoo
  //    input by: jakes
  //    input by: 3D-GRAF
  //    input by: Chris
  // bugfixed by: Kevin van Zonneveld (https://kvz.io)
  // bugfixed by: Kevin van Zonneveld (https://kvz.io)
  // bugfixed by: Marc Palau
  // bugfixed by: Brett Zamir (https://brett-zamir.me)
  //  revised by: Theriault (https://github.com/Theriault)
  //      note 1: The return values of the following examples are
  //      note 1: received only if your system's timezone is UTC.
  //   example 1: mktime(14, 10, 2, 2, 1, 2008)
  //   returns 1: 1201875002
  //   example 2: mktime(0, 0, 0, 0, 1, 2008)
  //   returns 2: 1196467200
  //   example 3: var $make = mktime()
  //   example 3: var $td = new Date()
  //   example 3: var $real = Math.floor($td.getTime() / 1000)
  //   example 3: var $diff = ($real - $make)
  //   example 3: $diff < 5
  //   returns 3: true
  //   example 4: mktime(0, 0, 0, 13, 1, 1997)
  //   returns 4: 883612800
  //   example 5: mktime(0, 0, 0, 1, 1, 1998)
  //   returns 5: 883612800
  //   example 6: mktime(0, 0, 0, 1, 1, 98)
  //   returns 6: 883612800
  //   example 7: mktime(23, 59, 59, 13, 0, 2010)
  //   returns 7: 1293839999
  //   example 8: mktime(0, 0, -1, 1, 1, 1970)
  //   returns 8: -1

  const d = new Date()
  const resolved: [number, number, number, number, number, number] = [
    d.getHours(),
    d.getMinutes(),
    d.getSeconds(),
    d.getMonth() + 1, // +1 to fix JS months.
    d.getDate(),
    d.getFullYear(),
  ]
  const input: [
    number | string | undefined,
    number | string | undefined,
    number | string | undefined,
    number | string | undefined,
    number | string | undefined,
    number | string | undefined,
  ] = [hour, minute, second, month, day, year]

  for (let i = 0; i < input.length; i++) {
    const value = input[i]
    if (typeof value !== 'undefined') {
      const parsed = Number.parseInt(String(value), 10)
      if (Number.isNaN(parsed)) {
        return false
      }
      resolved[i] = parsed
    }
  }

  // Map years 0-69 to 2000-2069 and years 70-100 to 1970-2000.
  const normalizedYear =
    resolved[5] + (resolved[5] >= 0 ? (resolved[5] <= 69 ? 2e3 : resolved[5] <= 100 ? 1900 : 0) : 0)

  // Set year, month (-1 to fix JS months), and date.
  // !This must come before the call to setHours!
  d.setFullYear(normalizedYear, resolved[3] - 1, resolved[4])

  // Set hours, minutes, and seconds.
  d.setHours(resolved[0], resolved[1], resolved[2])

  const time = d.getTime()

  // Divide milliseconds by 1000 to return seconds and drop decimal.
  // Add 1 second if negative or it'll be off from PHP by 1 second.
  return ((time / 1e3) >> 0) - Number(time < 0)
}