#!/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 trigger will pass in the following variables (declared from
# the environment or from the SOLUTION file)
#

YES=
QUIET=

while getopts ydqp: opt; do
  case "${opt}" in
  q)
    QUIET=1
    ;;
  p)
    PROJECT=${OPTARG}
    ;;
  y)
    YES=1
    ;;
  [?])
    >&2 echo -e "\nInvalid parameter: ${opt}\n"
    usage >&2
    exit 1
    ;;
  esac
done
shift $(( OPTIND-1 ))

TRIGGER_VARS=(
  OS_DISTRO
  OS_RELEASE
  PACKAGE_STREAM
  PACKAGE_REPOSITORY
  BRANCH
  BUILD
  REF
)

# Create a copy of the current values for each trigger
# variable so we can show which ones were modified by the
# SOLUTION import.
for variable in ${TRIGGER_VARS[@]}; do
  def=def_${variable}
  export ${def}="${!variable}"
done

# Bring in the variables from SOLUTION file, supporting
# nested substitution
[[ -e SOLUTION ]] && . SOLUTION

VARS=()
[[ -e SOLUTION ]] && VARS=($(sed -nE "s,(^[^#][^=]*).*$,\1,pg" SOLUTION))
for var in ${VARS[@]}; do
  export ${var}
done

CURL=$(which curl)
[[ "${CURL}" != "" ]] || {
  2>&1 echo "'curl' not found. Please install via 'apt-get install curl' and try again."
  exit 1
}

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

PROJECT=${PROJECT:-${CONTAINER}}
PROJECT=${PROJECT:-$(basename $(pwd))}
PROJECT="vtt/sws/osgc/solutions/${PROJECT}"
URI_PROJECT=$(echo ${PROJECT} | sed -E 's,/,%2F,g')

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"

(( ! QUIET )) && echo "Looking for CI trigger on ${PROJECT}"

RESULTS=$(curl --noproxy '*' -s -X GET \
      --header "PRIVATE-TOKEN: ${SYS_OSGC_TOKEN}" \
      --header "Content-Type: application/json" \
      ${GITLAB}/api/v4/projects/${URI_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}" == "" ]] && {
  (( ! QUIET )) && echo "'sys_osgc CI trigger' does not exist on ${PROJECT}."

  (( YES )) || 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"' \
      ${GITLAB}/api/v4/projects/${URI_PROJECT}/triggers)

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

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

  (( ! QUIET )) && echo "Created token: ${TOKEN}"
}

(( ! QUIET )) && echo "Using token: ${TOKEN}"

function post {
  CMD="curl --noproxy '*' -s -X POST -F token=${TOKEN} -F ref=${REF} "
  for variable in ${TRIGGER_VARS[@]}; do
    CMD+="-F variables[${variable}]=${!variable} "
  done
  CMD+="${GITLAB}/api/v4/projects/${URI_PROJECT}/trigger/pipeline"

  RESULTS=$(${CMD})

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

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

  (( ! QUIET )) && echo -e "Pipeline URL:\n\n  ${GITLAB}${PIPELINE}\n"
  (( QUIET )) && echo "$(basename ${PIPELINE})"

  true
}

(( ! QUIET )) && cat << EOF
Triggering pipeline on project:

  ${PROJECT}

With the following variables:

$(
has_override=0
for variable in ${TRIGGER_VARS[@]}; do
  def=def_${variable}
  modified=' '
  if [[ "${!def}" != "" ]]; then
    if [[ "${!def}" != "${!variable}" ]]; then
      modified='*'
      has_override=1
    fi
  fi
  echo " ${modified} ${variable}=${!variable}"
done

(( has_override )) && {
  echo -e " ^\n │\n └── Value set in ENV but modified by SOLUTION file."
}
)

EOF

(( YES )) || while read -n1 -r -p "Is this correct [y|N]? "; do
  case $REPLY in
  y|Y)
    echo ""
    break
    ;;
  n|N|"")
    echo " Exiting."
    exit 1
    ;;
  *)
    echo ""
    ;;
  esac
done

post