#!/usr/bin/env bash

releaseControllerUrl="https://amd64.ocp.releases.ci.openshift.org"

mapfile -t menu_items < \
  <(curl -L -s ${releaseControllerUrl} \
    | grep "<h2" \
    | sort -V \
    | sed -E 's/.*title="([^"]*)".*id="([^"]*)".*/\2\n\1/' \
  )

latest_nightly=$(printf "%s\n" "${menu_items[@]}" | grep ".nightly" | tail -n 1)

if [ "$1" == "latest" ] ; then
  release="${latest_nightly}"
elif [ -n "$1" ] ; then
  release="$1"
else
  release=$( \
    whiptail --title "Download OpenShift Installer" \
      --menu "Select an image stream to download openshift-install from:" \
      20 80 12 "${menu_items[@]}" \
      3>&1 1>&2 2>&3
  )
fi

if [ "${release}" == "4-stable" ] ; then
  mapfile -t menu_items < \
    <(curl -L -s "${releaseControllerUrl}/api/v1/releasestream/${release}/tags?phase=Accepted&format=json" \
      | jq -r '.tags[]|select(.name|contains("-")|not)|select(.pullSpec|contains("@sha")|not)|.pullSpec,""' \
    )
  release_pullSpec=$( \
    whiptail --title "Download Stable OpenShift Installer" \
      --menu "Select a release to download openshift-install from:" \
      20 80 12 "${menu_items[@]}" \
      3>&1 1>&2 2>&3
  )
fi

if [ -z "$release_pullSpec" ] ; then
  release_pullSpec=$(curl -L -s "${releaseControllerUrl}/api/v1/releasestream/${release}/latest?format=pullSpec")
fi

if [ -n "$release" ] ; then
  echo "Extracting openshift-install (${release_pullSpec}) to bin/..."
  oc adm release extract --command=openshift-install --to=bin/ "${release_pullSpec}"
fi