#!/bin/bash

# 1. List project triggers, looking for 'sys_osgc CI trigger'
# 2. If not found, create the 'sys_osgc CI trigger'
# 3. Invoke the trigger

# The following constants are used so we can run trigger.sh
# against a known build
BUILD=${BUILD:-7517585}
BRANCH=${BRANCH:-releases_19.4}
PROJECT=${PROJECT:-50552}
REF=${REF:-master}

eval $(grep ^SYS_OSGC_TOKEN SECRETS)

[[ "$SYS_OSGC_TOKEN" == "" ]] && {
  >&2 echo "SECRETS needs to contain a GitLab token for SYS_OSGC_TOKEN."
  exit -1
}

GITLAB="https://gitlab.devtools.intel.com"

echo "Looking for CI trigger"

RESULTS=$(curl --noproxy '*' -s -X GET \
      --header "PRIVATE-TOKEN: ${SYS_OSGC_TOKEN}" \
      --header "Content-Type: application/json" \
      ${GITLAB}/api/v4/projects/${PROJECT}/triggers)

TOKEN=$(echo ${RESULTS} | sed -E 's#([{},])#\1\n#g' | {
  STATE=0
  MATCH=
  TOKEN=
  # Parse the JSON looking for the trigger token and description of
  # 'sys_osgc CI Trigger'
  while read line; do
    case ${STATE} in
    0)
      [[ ${line} =~ ^[[:space:]]*\{ ]] && STATE=1
      ;;
    1)
      [[ "${MATCH}" != "sys_osgc CI trigger" ]] &&
        MATCH=$(echo ${line} |
          sed -nE 's,^.*"description":\s*"([^"]+)".*$,\1,p')
      [[ "${TOKEN}" == "" ]] &&
        TOKEN=$(echo ${line} |
          sed -nE 's,^.*"token":\s*"([^"]+)".*$,\1,p')
      [[ "${TOKEN}" != "" ]] && [[ "${MATCH}" == "sys_osgc CI trigger" ]] && break
      [[ "${line}" =~ .*\s*} ]] && {
        MATCH=
        TOKEN=
        STATE=0
      }
      ;;
    esac
  done
  [[ "${TOKEN}" == "" ]] && echo -n ""
  echo -n "${TOKEN}"
})

[[ "${TOKEN}" == "" ]] && {
  echo "'sys_osgc CI trigger' does not exist on ${PROJECT}."

  while read -n1 -r -p "Create new trigger [y|N]?"; do
    case $REPLY in
    y|Y)
      echo ""
      break
      ;;
    n|N|"")
      echo " Exiting."
      exit 1
      ;;
    *)
      echo ""
      ;;
    esac
  done


  RESULTS=$(curl --noproxy '*' -s -X POST \
      --header "PRIVATE-TOKEN: ${SYS_OSGC_TOKEN}" \
      -F 'description="sys_osgc CI trigger"' \
      ${GITLAB}/api/v4/projects/${PROJECT}/triggers)

  TOKEN=$(echo ${RESULTS} | sed -nE 's,.*"token":\s*"([^"]*).*,\1,p')

  [[ "${TOKEN}" == "" ]] && {
    >&2 echo "Unable to create trigger"
    >&2 echo "${RESULTS}"
    exit 1
  }

  echo "Created token: ${TOKEN}"
}

echo "Using token: ${TOKEN}"

function post {
  RESULTS=$(curl --noproxy '*' -s -X POST \
      -F "token=${TOKEN}" \
      -F "ref=${REF}" \
      -F "variables[OS_DISTRO]=ubuntu" \
      -F "variables[OS_RELEASE]=disco" \
      -F "variables[PACKAGE_STREAM]=disco" \
      -F "variables[BRANCH]=${BRANCH}" \
      -F "variables[BUILD]=${BUILD}" \
      -F "variables[BUILDNUMBER]=${BUILD}" \
      ${GITLAB}/api/v4/projects/${PROJECT}/trigger/pipeline)

  PIPELINE=$(echo ${RESULTS} | sed -nE 's,^.*details_path":"([^"]*)".*,\1,p')

  [[ "${PIPELINE}" == "" ]] && {
    >&2 echo "Unable to find pipeline details URL"
    >&2 echo ${RESULTS}
    return 1
  }

  echo -e "Pipeline URL:\n\n  ${GITLAB}${PIPELINE}\n"
  true
}

echo "Triggering pipeline on project ${PROJECT} for BUILD=${BUILD} and BRANCH=${BRANCH}"
while read -n1 -r -p "Is this correct [y|N]?"; do
  case $REPLY in
  y|Y)
    echo ""
    post
    break
    ;;
  n|N|"")
    echo " Exiting."
    exit 1
    ;;
  *)
    echo ""
    ;;
  esac
done