#!/usr/bin/env bash
set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x

PLUGIN_BASE_PATH="$PLUGIN_PATH"
if [[ -n $DOKKU_API_VERSION ]]; then
  PLUGIN_BASE_PATH="$PLUGIN_ENABLED_PATH"
fi
source "$PLUGIN_BASE_PATH/common/functions"
source "$(dirname "$0")/functions"
source "$(dirname "$0")/config"

if [[ $1 == $PLUGIN_COMMAND_PREFIX:* ]]; then
  if [[ ! -d $PLUGIN_DATA_ROOT ]]; then
    dokku_log_fail "$PLUGIN_SERVICE: Please run: sudo dokku plugin:install"
  fi
fi

case "$1" in
  $PLUGIN_COMMAND_PREFIX:create)
    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
    [[ ! -d "$PLUGIN_DATA_ROOT/$2" ]] || dokku_log_fail "$PLUGIN_SERVICE service $2 already exists"
    SERVICE="$2"; SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"; LINKS_FILE="$SERVICE_ROOT/LINKS"

    if ! docker images | grep -e "^$PLUGIN_IMAGE " | grep -q " $PLUGIN_IMAGE_VERSION " ; then
      dokku_log_fail "$PLUGIN_SERVICE image $PLUGIN_IMAGE:$PLUGIN_IMAGE_VERSION not found"
    fi

    mkdir -p "$SERVICE_ROOT" || dokku_log_fail "Unable to create service directory"
    password=$(openssl rand -hex 16)
    echo "$password" > "$SERVICE_ROOT/PASSWORD"
    chmod 640 "$SERVICE_ROOT/PASSWORD"
    touch "$LINKS_FILE"

    dokku_log_info1 "Starting container"
    if [[ -n $POSTGRES_CUSTOM_ENV ]]; then
      echo "$POSTGRES_CUSTOM_ENV" | tr ';' "\n" > "$SERVICE_ROOT/ENV"
    else
      echo "" > "$SERVICE_ROOT/ENV"
    fi
    SERVICE_NAME=$(get_service_name "$SERVICE")
    ID=$(docker run --name "$SERVICE_NAME" -v "$SERVICE_ROOT/data:/var/lib/postgresql/data" -e "POSTGRES_PASSWORD=$password" --env-file="$SERVICE_ROOT/ENV" -d --restart always --label dokku=service --label dokku.service=postgres "$PLUGIN_IMAGE:$PLUGIN_IMAGE_VERSION")
    echo "$ID" > "$SERVICE_ROOT/ID"

    dokku_log_verbose_quiet "Waiting for container to be ready"
    docker run --rm --link "$SERVICE_NAME:$PLUGIN_COMMAND_PREFIX" dokkupaas/wait > /dev/null

    dokku_log_verbose_quiet "Creating container database"
    DATABASE_NAME="$(get_database_name "$SERVICE")"
    docker exec "$SERVICE_NAME" su - postgres -c "createdb -E utf8 $DATABASE_NAME" 2> /dev/null || echo 'Already exists'

    dokku_log_verbose_quiet "Securing connection to database"
    service_stop "$SERVICE" > /dev/null
    docker run --rm -i -v "$SERVICE_ROOT/data:/var/lib/postgresql/data" "$PLUGIN_IMAGE:$PLUGIN_IMAGE_VERSION" bash -s < "$(dirname "$0")/scripts/enable_ssl.sh" &> /dev/null
    service_start "$SERVICE" > /dev/null

    dokku_log_info2 "$PLUGIN_SERVICE container created: $SERVICE"
    dokku "$PLUGIN_COMMAND_PREFIX:info" "$SERVICE"
    ;;

  $PLUGIN_COMMAND_PREFIX:destroy)
    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
    verify_service_name "$2"
    SERVICE="$2"; SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"; LINKS_FILE="$SERVICE_ROOT/LINKS"
    SERVICE_NAME=$(get_service_name "$SERVICE")

    [[ -s "$LINKS_FILE" ]] && dokku_log_fail "Cannot delete linked service"

    [[ "$3" == "force" ]] && DOKKU_APPS_FORCE_DELETE=1
    if [[ -z "$DOKKU_APPS_FORCE_DELETE" ]]; then
      dokku_log_warn "WARNING: Potentially Destructive Action"
      dokku_log_warn "This command will destroy $SERVICE $PLUGIN_SERVICE service."
      dokku_log_warn "To proceed, type \"$SERVICE\""
      echo ""

      read -p "> " service_name
      if [[ "$service_name" != "$SERVICE" ]]; then
        dokku_log_warn "Confirmation did not match $SERVICE. Aborted."
        exit 1
      fi
    fi

    dokku_log_info1 "Deleting $SERVICE"
    if [[ -n $(docker ps -aq -f name="$SERVICE_NAME") ]]; then
      service_stop "$SERVICE"
      sleep 1

      dokku_log_verbose_quiet "Removing container"
      docker rm -v "$SERVICE_NAME" > /dev/null
      sleep 1
    else
      dokku_log_verbose_quiet "No container exists for $SERVICE"
    fi

    dokku_log_verbose_quiet "Removing data"
    docker run --rm -v "$SERVICE_ROOT/data:/data" "$PLUGIN_IMAGE:$PLUGIN_IMAGE_VERSION" chmod 777 -R /data
    rm -rf "$SERVICE_ROOT"

    dokku_log_info2 "$PLUGIN_SERVICE container deleted: $SERVICE"
    ;;

  $PLUGIN_COMMAND_PREFIX:link)
    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
    [[ -z $3 ]] && dokku_log_fail "Please specify an app to run the command on"
    verify_app_name "$3"
    verify_service_name "$2"
    service_link "$2" "$3"
    ;;

  $PLUGIN_COMMAND_PREFIX:unlink)
    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
    [[ -z $3 ]] && dokku_log_fail "Please specify an app to run the command on"
    verify_app_name "$3"
    verify_service_name "$2"
    service_unlink "$2" "$3"
    ;;

  $PLUGIN_COMMAND_PREFIX:export)
    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
    verify_service_name "$2"
    SERVICE="$2"; SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"
    SERVICE_NAME="$(get_service_name "$SERVICE")"
    DATABASE_NAME="$(get_database_name $SERVICE)"
    PASSWORD=$(cat "$SERVICE_ROOT/PASSWORD")

    [[ -n $SSH_TTY ]] && stty -opost
    docker exec "$SERVICE_NAME" env PGPASSWORD="$PASSWORD" pg_dump -Fc --no-acl --no-owner -h localhost -U postgres -w "$DATABASE_NAME"
    [[ -n $SSH_TTY ]] && stty opost
    ;;

  $PLUGIN_COMMAND_PREFIX:import)
    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
    verify_service_name "$2"
    SERVICE="$2"; SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"
    SERVICE_NAME="$(get_service_name "$SERVICE")"
    DATABASE_NAME="$(get_database_name $SERVICE)"
    PASSWORD=$(cat "$SERVICE_ROOT/PASSWORD")

    if [[ -t 0 ]]; then
      dokku_log_fail "No data provided on stdin."
    fi
    docker exec -i "$SERVICE_NAME" env PGPASSWORD="$PASSWORD" pg_restore -h localhost -cO -d "$DATABASE_NAME" -U postgres -w
    ;;

  $PLUGIN_COMMAND_PREFIX:logs)
    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
    verify_service_name "$2"
    service_logs "$2" "$3"
    ;;

  $PLUGIN_COMMAND_PREFIX:start)
    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
    verify_service_name "$2"
    service_start "$2"
    ;;

  $PLUGIN_COMMAND_PREFIX:stop)
    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
    verify_service_name "$2"
    service_stop "$2"
    ;;

  $PLUGIN_COMMAND_PREFIX:restart)
    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
    verify_service_name "$2"
    service_stop "$2"
    service_start "$2"
    dokku_log_info1 "Please call dokku ps:restart on all linked apps"
    ;;

  $PLUGIN_COMMAND_PREFIX:connect)
    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
    verify_service_name "$2"
    SERVICE="$2"; SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"
    DATABASE_NAME="$(get_database_name $SERVICE)"
    SERVICE_NAME="$(get_service_name "$SERVICE")"
    has_tty && SERVICE_TTY_OPTS="-t"

    docker exec -i $SERVICE_TTY_OPTS "$SERVICE_NAME" psql -h localhost -U postgres "$DATABASE_NAME"
    ;;

  $PLUGIN_COMMAND_PREFIX:info)
    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
    verify_service_name "$2"
    service_info "$2"
    ;;

  $PLUGIN_COMMAND_PREFIX:list)
    service_list
    ;;

  $PLUGIN_COMMAND_PREFIX:clone)
    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
    [[ -z $3 ]] && dokku_log_fail "Please specify a name for the new service"
    verify_service_name "$2"
    SERVICE="$2"
    NEW_SERVICE="$3"
    dokku "$PLUGIN_COMMAND_PREFIX:create" "$NEW_SERVICE"
    dokku_log_info1 "Copying data from $SERVICE to $NEW_SERVICE"
    dokku "$PLUGIN_COMMAND_PREFIX:export" "$SERVICE" | dokku "$PLUGIN_COMMAND_PREFIX:import" "$NEW_SERVICE" > /dev/null 2>&1 || true
    dokku_log_info1 "Done"
    ;;

  $PLUGIN_COMMAND_PREFIX:expose)
    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
    verify_service_name "$2"
    service_port_expose "$2" "${@:3}"
    ;;

  $PLUGIN_COMMAND_PREFIX:unexpose)
    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
    verify_service_name "$2"
    service_port_unexpose "$2"
    ;;

  $PLUGIN_COMMAND_PREFIX:promote)
    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
    [[ -z $3 ]] && dokku_log_fail "Please specify an app to run the command on"
    verify_service_name "$2"
    verify_app_name "$3"
    promote "$2" "$3"
    ;;

  help | $PLUGIN_COMMAND_PREFIX:help)
    HELP=$(cat<<EOF
    $PLUGIN_COMMAND_PREFIX:create <name>, Create a $PLUGIN_SERVICE service
    $PLUGIN_COMMAND_PREFIX:destroy <name>, Delete the $PLUGIN_SERVICE service and stop its container if there are no links left
    $PLUGIN_COMMAND_PREFIX:link <name> <app>, Link the $PLUGIN_SERVICE service to the app
    $PLUGIN_COMMAND_PREFIX:unlink <name> <app>, Unlink the $PLUGIN_SERVICE service from the app
    $PLUGIN_COMMAND_PREFIX:export <name>, Export a dump of the $PLUGIN_SERVICE service database
    $PLUGIN_COMMAND_PREFIX:import <name> < <file>, Import a dump into the $PLUGIN_SERVICE service database
    $PLUGIN_COMMAND_PREFIX:connect <name>, Connect via psql to a $PLUGIN_SERVICE service
    $PLUGIN_COMMAND_PREFIX:logs <name> [-t], Print the most recent log(s) for this service
    $PLUGIN_COMMAND_PREFIX:restart <name>, Graceful shutdown and restart of the $PLUGIN_SERVICE service container
    $PLUGIN_COMMAND_PREFIX:info <name>, Print the connection information
    $PLUGIN_COMMAND_PREFIX:list, List all $PLUGIN_SERVICE services
    $PLUGIN_COMMAND_PREFIX:clone <name> <new-name>, Create container <new-name> then copy data from <name> into <new-name>
    $PLUGIN_COMMAND_PREFIX:expose <name> [port], Expose a $PLUGIN_SERVICE service on custom port if provided (random port otherwise)
    $PLUGIN_COMMAND_PREFIX:unexpose <name>, Unexpose a previously exposed $PLUGIN_SERVICE service
    $PLUGIN_COMMAND_PREFIX:start <name>, Start a previously stopped $PLUGIN_SERVICE service
    $PLUGIN_COMMAND_PREFIX:stop <name>, Stop a running $PLUGIN_SERVICE service
    $PLUGIN_COMMAND_PREFIX:promote <name> <app>, Promote service <name> as ${PLUGIN_DEFAULT_ALIAS}_URL in <app>
EOF
)
    if [[ -n $DOKKU_API_VERSION ]]; then
      echo "$HELP"
    else
      cat && echo "$HELP"
    fi
    ;;

  *)
    exit "$DOKKU_NOT_IMPLEMENTED_EXIT"
    ;;

esac