#!/usr/bin/env bash

echo "
Checking existing changelog PR ..."
response=$(
	curl -sSL \
         -H "Accept: application/vnd.github+json" \
         -H "Authorization: Bearer ${GITHUB_TOKEN}" \
         -H "X-GitHub-Api-Version: 2022-11-28" \
         "https://api.github.com/repos/${1}/pulls?state=open&base=${2}&head=${4}" \
	     | jq -er '.[] | select(.head.ref == "'"${4}"'") | [.html_url, .head.ref] | @tsv'
)

if [[ -z "${response:+x}" ]] ; then
    echo "Not found. Creating ..."
    curl -sSL \
         -H "Accept: application/vnd.github+json" \
         -H "Authorization: Bearer ${GITHUB_TOKEN}" \
         -H "X-GitHub-Api-Version: 2022-11-28" \
         "https://api.github.com/repos/${1}/pulls" \
         -d '{"base":"'"${2}"'", "title":"'"docs(release): generate ${3} changelog"'","body":"'"Generate ${3} changelog"'","head":"'"${4}"'"}' \
         | jq -r '[.html_url, .head.ref] | @tsv'
else
    printf 'Updated existing PR: %s\n' "${response}"
fi