import os/Terminal
import math

ProgressBar: class {
    value: UInt = 0
    maxval: UInt = 100
    barwidth: UInt = 80

    text := "Please wait..."

    thorpe := "#" /* I wanted this to be a Char, but Chars don't have times() */
    period := "."

    thorpecolor := Color blue
    periodcolor := Color grey

    init: func() {
        println()
    }

    init: func ~withtext (=text) {
        println()
    }

    update: func() {
        "\e[A" print() /* Go up one line */
        "\b" times(999) print() /* Erase that line and go to the start of the line */

        this text println() /* Print the status text */

        ratio := (barwidth as Float/maxval as Float)

        Terminal setFgColor(this thorpecolor)
        this thorpe times(floor(value * ratio)) print()

        Terminal setFgColor(this periodcolor)
        this period times(barwidth - floor(value * ratio)) print()

        Terminal reset()
    }

    update: func ~withVal (val: Int) {
        if (val > maxval) {
            update(maxval)
        } else if (val < 0) {
            update(0)
        } else {
            this value = val
            update()
        }
    }

    finish: func() {
        this update(maxval)
        Terminal reset()
        "\n" print()
    }
}