#!/bin/bash
## compose: no-hooks

## Load action gets a first argument a FILE/DIRECTORY/URL holding the necessary files.
##
##

if [ -z "$SERVICE_DATASTORE" ]; then
    echo "This script is meant to be run through 'compose' to work properly." >&2
    exit 1
fi

version=0.1
usage="$exname [-h|--help] DBNAME"
help="
USAGE:

$usage

DESCRIPTION:

Read stdin and content to related postgres service in the database
DBNAME. If DBNAME is not provided, it'll take the default database
from the ${DARKCYAN}postgres-database${NORMAL} relation of current
service.

EXAMPLES:

  $exname < foo.sql
  $exname mydb2 < foo.sql

"


dbname=
output=
while [ "$1" ]; do
    case "$1" in
        "--help"|"-h")
            print_help >&2
            exit 0
            ;;
        "--force"|"-f")
            force=yes
            ;;
        --*|-*)
            err "Unexpected optional argument '$1'"
            print_usage >&2
            exit 1
            ;;
        *)
            [ -z "$dbname" ] && { dbname=$1 ; shift ; continue ; }
            err "Unexpected positional argument '$1'"
            print_usage >&2
            exit 1
        ;;
    esac
    shift
done


if [ -z "$dbname" ]; then

    ##
    ## Fetch default dbname in relation to postgres-database
    ##

    ## XXXvlab: can't get real config here
    if ! read-0 ts _ _ < <(get_service_relation "$SERVICE_NAME" "postgres-database"); then
        err "Couldn't find relation ${DARKCYAN}postgres-database${NORMAL}."
        exit 1
    fi

    relation_dir=$(get_relation_data_dir "$SERVICE_NAME" "$ts" "postgres-database") || {
        err "Failed to find relation dir"
        exit 1
    }
    postgres_config=$(cat "$relation_dir"/data) || exit 2

    dbname="$(e "$postgres_config" | shyaml get-value dbname)" || {
        err "Couldn't retrieve information of ${DARKCYAN}postgres-database${NORMAL}'s relation."
        exit 1
    }
    dbuser="$(e "$postgres_config" | shyaml get-value user)" || {
        err "Couldn't retrieve information of ${DARKCYAN}postgres-database${NORMAL}'s relation."
        exit 1
    }
    password="$(e "$postgres_config" | shyaml get-value password)" || {
        err "Couldn't retrieve information of ${DARKCYAN}postgres-database${NORMAL}'s relation."
        exit 1
    }

fi

set -e

containers="$(get_running_containers_for_service "$RELATION_TARGET_SERVICE")"

if [ -z "$containers" ]; then
    err "No containers running for service $DARKYELLOW$service$NORMAL."
    exit 1
fi



## XXXvlab: taking first container is probably not a good idea
container_id="$(echo "$containers" | head -n 1)"
docker exec -i -u 0 \
       -e PGUSER="$dbuser" \
       -e PGPASSWORD="$password" \
       "${container_id}" psql -qAt "$dbname"