#! /bin/bash

set -u
set -e

dry_run=
if [[ "${1:-}" == '-n' || "${1:-}" == '--dry-run' ]]
then
    dry_run=echo
fi

generate_release_notes() {
    OLDIFS="$IFS"
    IFS=$'\n' changelog=( $(git-log-from-last-tag) )
    IFS="$OLDIFS"
    for l in "${changelog[@]}"
    do
        [[ "$l" == 'Bump' ]] && continue
        printf '%s\n' "$l"
    done
}

blue=$(tput setaf 32)
sgr0=$(tput sgr0)
eval $(grep version setup.py | sed 's/,$//')
tag="v$version"
title="v$version"
if which -s gh-token
then
    gh-token
fi
$dry_run git tag "$tag" || printf 'WARNING: tag "%s" already exists\n' "$tag"
$dry_run git push --tags
if which -s gh
then
    release_notes=$(mktemp)
    generate_release_notes > "$release_notes"
    $dry_run gh release create --title "$title" --notes-file "$release_notes" "$tag"
    printf '\nNext steps:\n'
    step=1
else
    printf '\nNext steps:\n'
    printf '1. Create new release on Github using tag=%s title=%s\n' "$tag" "$title"
    printf '    url: %s%s%s\n' "${blue}" 'https://github.com/dtmilano/AndroidViewClient/releases/new' "${sgr0}"
    printf '\n'
    generate_release_notes
    step=2
fi

printf '%d. Github Actions kicks off automatically to release new version\n' "$step"