#!/usr/bin/env bash
set -eo pipefail
[[ $DOKKU_TRACE ]] && set -x
source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
source "$PLUGIN_AVAILABLE_PATH/config/functions"
source "$PLUGIN_AVAILABLE_PATH/ps/functions"

get_phase_script() {
  declare desc="extracts app.json from app image and returns the appropriate json key/value"
  declare IMAGE_TAG="$1" PHASE_SCRIPT_KEY="$2"
  local APP_JSON_FILE=$(mktemp "/tmp/dokku-${DOKKU_PID}-${FUNCNAME[0]}.XXXXXX")
  trap "rm -rf '$APP_JSON_FILE' >/dev/null" RETURN INT TERM

  copy_from_image "$IMAGE" "app.json" "$APP_JSON_FILE" 2>/dev/null || true

  if [[ ! -f "$APP_JSON_FILE" ]]; then
    return 0
  fi

  get_json_value "scripts.dokku.${PHASE_SCRIPT_KEY}" <"$APP_JSON_FILE"
}

get_release_cmd() {
  declare desc="extracts the release command from a given app's procfile"
  declare APP="$1" IMAGE_TAG="$2"

  extract_procfile "$APP" "$IMAGE_TAG" >/dev/null
  trap "remove_procfile $APP" RETURN INT TERM EXIT

  get_cmd_from_procfile "$APP" "release" "5000"
}

execute_script() {
  declare desc="executes appropriate phase script key from app.json"
  declare APP="$1" IMAGE_TAG="$2" PHASE_SCRIPT_KEY="$3"
  local IMAGE id SCRIPT_CMD

  local DOCKER_COMMIT_LABEL_ARGS=("--change" "\"LABEL org.label-schema.schema-version=1.0\"" "--change" "\"LABEL org.label-schema.vendor=dokku\"" "--change" "\"LABEL com.dokku.app-name=$APP\"")
  local DOCKER_RUN_LABEL_ARGS="--label=com.dokku.app-name=$APP"

  IMAGE=$(get_deploying_app_image_name "$APP" "$IMAGE_TAG")
  if [[ "$PHASE_SCRIPT_KEY" == "release" ]]; then
    SCRIPT_CMD=$(get_release_cmd "$APP" "$IMAGE_TAG" 2>/dev/null || true)
  else
    SCRIPT_CMD=$(get_phase_script "$IMAGE" "$PHASE_SCRIPT_KEY" 2>/dev/null || true)
  fi

  if [[ -z "$SCRIPT_CMD" ]]; then
    return
  fi

  dokku_log_exclaim "${PHASE_SCRIPT_KEY^} command declared: '$SCRIPT_CMD'"
  local COMMAND
  COMMAND="set -eo pipefail; [[ \$DOKKU_TRACE ]] && set -x ; "
  COMMAND+=" if [[ -d '/app' ]]; then "
  COMMAND+="   export HOME=/app ; "
  COMMAND+="   cd \$HOME ; "
  COMMAND+=" fi ; "
  COMMAND+=" if [[ -d '/app/.profile.d' ]]; then "
  COMMAND+="   for file in /app/.profile.d/*; do source \$file; done ; "
  COMMAND+=" fi ; "
  COMMAND+=" if [[ -d '/cache' ]]; then "
  COMMAND+="   rm -rf /tmp/cache ; "
  COMMAND+="   ln -sf /cache /tmp/cache ; "
  COMMAND+=" fi ; "

  if [[ "$SCRIPT_CMD" == /* ]]; then
    local SCRIPT_BIN="$(echo "$SCRIPT_CMD" | cut -d' ' -f1)"
    COMMAND+=" if [[ ! -x \"$SCRIPT_BIN\" ]]; then "
    COMMAND+="   echo specified binary is not executable ; "
    COMMAND+="   exit 1 ; "
    COMMAND+=" fi ; "
  fi

  COMMAND+=" $SCRIPT_CMD || exit 1;"
  COMMAND+=" if [[ -d '/cache' ]]; then "
  COMMAND+="   rm -f /tmp/cache ; "
  COMMAND+=" fi ; "

  local CACHE_DIR="$DOKKU_ROOT/$APP/cache"
  local CACHE_HOST_DIR="$DOKKU_HOST_ROOT/$APP/cache"
  [[ -d $CACHE_DIR ]] || mkdir -p "$CACHE_DIR"

  local DOCKER_ARGS=$(: | plugn trigger docker-args-deploy "$APP" "$IMAGE_TAG")
  # strip --restart args from DOCKER_ARGS
  local DOCKER_ARGS=$(sed -e "s/--restart=[[:graph:]]\+[[:blank:]]\?//g" <<<"$DOCKER_ARGS")

  local IMAGE_SOURCE_TYPE="dockerfile"
  is_image_herokuish_based "$IMAGE" && IMAGE_SOURCE_TYPE="herokuish"
  DOCKER_ARGS+=$(: | plugn trigger docker-args-process-deploy "$APP" "$IMAGE_TAG" "$IMAGE_SOURCE_TYPE")

  # eval args as array to respect escapes
  declare -a ARG_ARRAY
  eval "ARG_ARRAY=($DOCKER_ARGS)"

  local DOKKU_APP_SHELL="/bin/bash"
  DOKKU_APP_SHELL="$(config_get --global DOKKU_APP_SHELL || echo "$DOKKU_APP_SHELL")"
  DOKKU_APP_SHELL="$(config_get "$APP" DOKKU_APP_SHELL || echo "$DOKKU_APP_SHELL")"
  [[ -z "$DOKKU_APP_SHELL" ]] && DOKKU_APP_SHELL="/bin/bash"

  id=$("$DOCKER_BIN" run "${DOCKER_RUN_LABEL_ARGS[@]}" $DOKKU_GLOBAL_RUN_ARGS -e DOKKU_TRACE="$DOKKU_TRACE" --label=dokku_phase_script="${PHASE_SCRIPT_KEY}" -d -v "$CACHE_HOST_DIR:/cache" "${ARG_ARRAY[@]}" "$IMAGE" "$DOKKU_APP_SHELL" -c "$COMMAND")
  if test "$("$DOCKER_BIN" wait "$id")" -ne 0; then
    dokku_container_log_verbose_quiet "$id"
    dokku_log_fail "execution of '$SCRIPT_CMD' failed!"
  fi

  dokku_container_log_verbose_quiet "$id"
  if [[ "$PHASE_SCRIPT_KEY" != "predeploy" ]]; then
    return
  fi

  if ! is_image_herokuish_based "$IMAGE"; then
    local DOKKU_DOCKERFILE_ENTRYPOINT=$(config_get "$APP" DOKKU_DOCKERFILE_ENTRYPOINT)
    local DOKKU_DOCKERFILE_CMD=$(config_get "$APP" DOKKU_DOCKERFILE_CMD)
    [[ -z "$DOKKU_DOCKERFILE_ENTRYPOINT" ]] && DOKKU_DOCKERFILE_ENTRYPOINT="$(get_entrypoint_from_image "$IMAGE")"
    [[ -z "$DOKKU_DOCKERFILE_CMD" ]] && DOKKU_DOCKERFILE_CMD="$(get_cmd_from_image "$IMAGE")"

    [[ -n "$DOKKU_DOCKERFILE_ENTRYPOINT" ]] && local DOCKER_COMMIT_ENTRYPOINT_CHANGE_ARG="--change='$DOKKU_DOCKERFILE_ENTRYPOINT'"
    [[ -n "$DOKKU_DOCKERFILE_CMD" ]] && local DOCKER_COMMIT_CMD_CHANGE_ARG="--change='$DOKKU_DOCKERFILE_CMD'"

    local DOCKER_COMMIT_ARGS="$DOCKER_COMMIT_ENTRYPOINT_CHANGE_ARG $DOCKER_COMMIT_CMD_CHANGE_ARG"
  fi

  eval "$DOCKER_BIN" commit "${DOCKER_COMMIT_LABEL_ARGS[@]}" "${DOCKER_COMMIT_ARGS[@]}" "$id" "$IMAGE" >/dev/null
}