#!/bin/sh -e

get_merge_request_iid() {
    for page in 1 2 3 4 5; do
	for mr in $(curl --silent "${CI_API_V4_URL}/projects/${project_id}/merge_requests?page=${page}&per_page=50&state=opened&order_by=updated_at" | grep -Eo '"iid": *[0-9]+' | grep -Eo '[0-9]+$'); do
	    if curl --silent "${CI_API_V4_URL}"/projects/"${project_id}"/merge_requests/"${mr}"/pipelines \
		    | grep -Eo "\"id\": *${CI_PIPELINE_ID}," > /dev/null; then
		echo "${mr}"
		return 0
	    fi
	    1>&2 printf '.'
	done
    done
}

# insecure "captcha"
s=$((4$(printf "$CI_COMMIT_SHA" | wc -c)-10))
e=$((s+$(echo "$CI_SERVER_HOST" | wc -c)+18))
issuebot=$(cat .issuebot | cut -b${s}-${e})
project_id=36528

if test -z "$CI_API_V4_URL"; then
    echo CI_API_V4_URL is not set
    exit 1
elif test -z "$CI_PIPELINE_ID"; then
    echo CI_PIPELINE_ID is not set
    exit 1
fi

CI_MERGE_REQUEST_IID=$(get_merge_request_iid)

if test -z "$CI_MERGE_REQUEST_IID"; then
    echo "$0 No merge request found, not triggering"
    exit 0
fi

curl --silent --request POST \
     --form token="$issuebot" \
     --form ref=master \
     --form "variables[FROM_CI_COMMIT_REF_NAME]=$CI_COMMIT_REF_NAME" \
     --form "variables[FROM_CI_COMMIT_REF_SLUG]=$CI_COMMIT_REF_SLUG" \
     --form "variables[FROM_CI_COMMIT_SHA]=$CI_COMMIT_SHA" \
     --form "variables[FROM_CI_JOB_ID]=$CI_JOB_ID" \
     --form "variables[FROM_CI_MERGE_REQUEST_IID]=$CI_MERGE_REQUEST_IID" \
     --form "variables[FROM_CI_PIPELINE_ID]=$CI_PIPELINE_ID" \
     --form "variables[FROM_CI_PROJECT_PATH]=$CI_PROJECT_PATH" \
     --form "variables[FROM_CI_PROJECT_URL]=$CI_PROJECT_URL" \
     "${CI_API_V4_URL}"/projects/${project_id}/trigger/pipeline > logs/result.json \
    || echo "$0 failed to post to a merge request"