import GLib from "gi://GLib?version=2.0"
import { range } from "../../lib/utils.js"
import options from "../../options.js"

export default ({
  height = 18,
  width = 180,
  vertical = false,
  child,
}) => {
  const fill = Widget.Box({
    class_name: "fill",
    hexpand: vertical,
    vexpand: !vertical,
    hpack: vertical ? "fill" : "start",
    vpack: vertical ? "end" : "fill",
    child,
  })

  const container = Widget.Box({
    class_name: "progress",
    child: fill,
    css: `
            min-width: ${width}px;
            min-height: ${height}px;
        `,
  })

  let fill_size = 0
  let animations = []

  return Object.assign(container, {
    setValue(value) {
      if (value < 0)
        return

      if (animations.length > 0) {
        for (const id of animations)
          GLib.source_remove(id)

        animations = []
      }

      const axis = vertical ? "height" : "width"
      const axisv = vertical ? height : width
      const min = vertical ? width : height
      const preferred = (axisv - min) * value + min

      if (!fill_size) {
        fill_size = preferred
        fill.css = `min-${axis}: ${preferred}px;`
        return
      }

      const frames = options.transition / 10
      const goal = preferred - fill_size
      const step = goal / frames

      animations = range(frames, 0).map(i => Utils.timeout(5 * i, () => {
        fill_size += step
        fill.css = `min-${axis}: ${fill_size}px`
        animations.shift()
      }))
    },
  })
}