#!/bin/bash

REPOAPIURL=https://git.bitmessage.org/api/v1/repos/Bitmessage/PyBitmessage
upstream="v0.6"

if [ -z "${1}" ]; then
    echo "Please specify a credential string"
    exit 1
fi

if [ -z "${2}" ]; then
    echo "No PR# specified, here is a list:"
    curl -s -X GET -u ${1} ${REPOAPIURL}/pulls \
	| jq '.[] | select(.state == "open") | .number, .title' | paste - -
    exit 1
fi

# Read PR and parse its fields
pr=$(curl -s -X GET -u ${1} ${REPOAPIURL}/pulls/${2})

branch=$(echo $pr | jq '.head | (.repo.ssh_url + " " + .label)' | tr -d '"')
title=$(echo $pr | jq '.title')
body=$(echo $pr | jq '.body')


echo "Merging PR ${2}"

# Merge PR branch into the newly created branch and push it to github
git checkout v0.6
git branch -d gitea-${2}
git checkout -b gitea-${2} v0.6
git pull ${branch} || exit 1
git push --set-upstream origin gitea-${2}
git checkout v0.6

if [ -z "${3}" ]; then
    echo "No github credentials specified, stopping"
    exit 1
fi

head=$(echo ${3} | cut -d: -f1):gitea-${2}

REPOAPIURL=https://api.github.com/repos/Bitmessage/PyBitmessage

# Create PR on github and parse its fields
pr=$(curl -s -u ${3} -X POST \
  -H "Accept: application/vnd.github.v3+json" ${REPOAPIURL}/pulls \
  -d "{\"title\":${title},\"body\":${body},\"head\":\"${head}\",\"base\":\"${upstream}\"}")

commit=$(echo $pr | jq '.head.sha' | tr -d '"')
branch=(echo $pr | jq '.base.ref' | tr -d '"')
url=$(echo $pr | jq '.url' | tr -d '"')


# Return non-zero status if have a check with conclusion other than "success"
pr_status () {
    checks=$(
	curl -s -X GET \
	     -H "Accept: application/vnd.github.v3+json" \
	     ${REPOAPIURL}/commits/${1}/check-runs)
    if [[ \
$(echo $checks | jq \
'(.check_runs | map(select(.conclusion == "success")) | length) == .total_count'\
) != true ]]; then
	return 1
    fi
}

# Invoke pullrequest.sh script if pr_status is 0 within 30 tries in 5 min
for tick in {1..30}; do
    sleep 10
    pr_status ${commit}

    if [[ $? -eq 0 ]]; then
	./git-tools.sh mergepullrequest $(curl -s -X GET ${url} | jq '.number')
	break
    fi
done


# curl -s -X GET ${REPOAPIURL}/commits/${commit}/status

# curl -s -u ${3} -X POST \
#      -H "Accept: application/vnd.github.v3+json" $url/reviews \
#      -d '{"event":"APPROVE"}'
# "Can not approve your own pull request"

# Delete branch:
# curl -s -u ${3} -X DELETE -H "Accept: application/vnd.github.v3+json" \
# ${REPOAPIURL}/git/refs/heads/gitea-${2}