#!/usr/bin/env bash
source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/config"
set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/common-functions"
source "$PLUGIN_BASE_PATH/common/functions"
source "$PLUGIN_AVAILABLE_PATH/config/functions"
if [[ -f "$PLUGIN_AVAILABLE_PATH/docker-options/functions" ]]; then
  source "$PLUGIN_AVAILABLE_PATH/docker-options/functions"
fi

service_connect() {
  local SERVICE="$1"
  local SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"
  local SERVICE_NAME="$(get_service_name "$SERVICE")"
  local DATABASE_NAME="$(get_database_name "$SERVICE")"
  local SERVICE_TTY_OPTS
  has_tty && SERVICE_TTY_OPTS="-t"

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

service_create() {
  local SERVICE="$1"
  is_valid_service_name "$SERVICE" || dokku_log_fail "Please specify a valid name for the service. Valid characters are: [A-Za-z0-9_]+"
  [[ -z "$SERVICE" ]] && dokku_log_fail "Please specify a valid name for the service"
  [[ ! -d "$PLUGIN_DATA_ROOT/$SERVICE" ]] || dokku_log_fail "$PLUGIN_SERVICE service $SERVICE already exists"
  SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"; LINKS_FILE="$SERVICE_ROOT/LINKS"

  service_parse_args "${@:2}"

  if ! service_image_exists "$SERVICE"; then
    if [[ "$PLUGIN_DISABLE_PULL" == "true" ]]; then
      dokku_log_warn "${PLUGIN_DISABLE_PULL_VARIABLE} environment variable detected. Not running pull command." 1>&2
      dokku_log_warn "   docker pull ${IMAGE}" 1>&2
      dokku_log_warn "$PLUGIN_SERVICE service creation failed"
      exit 1
    fi
    docker pull "$PLUGIN_IMAGE:$PLUGIN_IMAGE_VERSION" || dokku_log_fail "$PLUGIN_SERVICE image $PLUGIN_IMAGE:$PLUGIN_IMAGE_VERSION pull failed"
  fi

  mkdir -p "$SERVICE_ROOT" || dokku_log_fail "Unable to create service directory"
  mkdir -p "$SERVICE_ROOT/data" || dokku_log_fail "Unable to create service data directory"
  touch "$LINKS_FILE"

  PASSWORD=$(openssl rand -hex 16)
  if [[ -n "$SERVICE_PASSWORD" ]]; then
    PASSWORD="$SERVICE_PASSWORD"
    dokku_log_warn "Specified password may not be as secure as the auto-generated password"
  fi
  echo "$PASSWORD" > "$SERVICE_ROOT/PASSWORD"
  chmod 640 "$SERVICE_ROOT/PASSWORD"

  [[ -n "$SERVICE_CUSTOM_ENV" ]] && POSTGRES_CUSTOM_ENV="$SERVICE_CUSTOM_ENV"
  if [[ -n $POSTGRES_CUSTOM_ENV ]]; then
    echo "$POSTGRES_CUSTOM_ENV" | tr ';' "\n" > "$SERVICE_ROOT/ENV"
  else
    echo "" > "$SERVICE_ROOT/ENV"
  fi
  service_create_container "$SERVICE"
}

service_create_container() {
  local SERVICE="$1"
  local SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"
  local SERVICE_HOST_ROOT="$PLUGIN_DATA_HOST_ROOT/$SERVICE"
  local SERVICE_NAME="$(get_service_name "$SERVICE")"
  local PASSWORD="$(cat "$SERVICE_ROOT/PASSWORD")"
  local PREVIOUS_ID

  ID=$(docker run --name "$SERVICE_NAME" -v "$SERVICE_HOST_ROOT/data:/var/lib/postgresql/data" -e "POSTGRES_PASSWORD=$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:0.2 -p "$PLUGIN_DATASTORE_WAIT_PORT" > /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 || dokku_log_verbose_quiet 'Already exists'

  dokku_log_verbose_quiet "Securing connection to database"
  service_stop "$SERVICE" > /dev/null
  docker run --rm -i -v "$SERVICE_HOST_ROOT/data:/var/lib/postgresql/data" "$PLUGIN_IMAGE:$PLUGIN_IMAGE_VERSION" bash -s < "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/scripts/enable_ssl.sh" &> /dev/null

  PREVIOUS_ID=$(docker ps -f status=exited --no-trunc | grep -e "$SERVICE_NAME$" | awk '{print $1}') || true
  docker start "$PREVIOUS_ID" > /dev/null
  service_port_unpause "$SERVICE"

  dokku_log_info2 "$PLUGIN_SERVICE container created: $SERVICE"
  service_info "$SERVICE"
}

service_export() {
  local SERVICE="$1"
  local SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"
  local SERVICE_NAME="$(get_service_name "$SERVICE")"
  local DATABASE_NAME="$(get_database_name "$SERVICE")"
  local PASSWORD="$(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"
  status=$?
  [[ -n $SSH_TTY ]] && stty opost
  exit $status
}

service_import() {
  local SERVICE="$1"
  local SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"
  local SERVICE_HOST_ROOT="$PLUGIN_DATA_HOST_ROOT/$SERVICE"
  local SERVICE_NAME="$(get_service_name "$SERVICE")"
  local DATABASE_NAME="$(get_database_name "$SERVICE")"
  local PASSWORD="$(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 --if-exists -d "$DATABASE_NAME" -U postgres -w
}

service_start() {
  local SERVICE="$1"
  local QUIET="$2"
  local SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"
  local SERVICE_NAME="$(get_service_name "$SERVICE")"
  local ID=$(docker ps -f status=running --no-trunc | grep -e "$SERVICE_NAME$" | awk '{print $1}') || true
  if [[ -n $ID ]]; then
    [[ -z $QUIET ]] && dokku_log_warn "Service is already started"
    return 0
  fi

  dokku_log_info2_quiet "Starting container"
  local PREVIOUS_ID=$(docker ps -f status=exited --no-trunc | grep -e "$SERVICE_NAME$" | awk '{print $1}') || true
  local PASSWORD="$(cat "$SERVICE_ROOT/PASSWORD")"

  if [[ -n $PREVIOUS_ID ]]; then
    docker start "$PREVIOUS_ID" > /dev/null
    service_port_unpause "$SERVICE"
    dokku_log_info2 "Container started"
  elif service_image_exists "$SERVICE" && [[ -n "$PASSWORD" ]]; then
    service_create_container "$SERVICE"
  else
    dokku_log_verbose_quiet "Neither container nor valid configuration exists for $SERVICE"
  fi
}

service_url() {
  local SERVICE="$1"
  local SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"

  local PASSWORD="$(cat "$SERVICE_ROOT/PASSWORD")"
  local DATABASE_NAME="$(get_database_name "$SERVICE")"
  local SERVICE_DNS_HOSTNAME="$(service_dns_hostname "$SERVICE")"
  echo "$PLUGIN_SCHEME://postgres:$PASSWORD@$SERVICE_DNS_HOSTNAME:${PLUGIN_DATASTORE_PORTS[0]}/$DATABASE_NAME"
}