#!/bin/bash

## When writing relation script, remember:
##  - they should be idempotents
##  - they can be launched while the dockers is already up
##  - they are launched from the host
##  - the target of the link is launched first, and get a chance to ``relation-set``
##  - both side of the scripts get to use ``relation-get``.


DBNAME=$(relation-get dbname) || {
    DBNAME="$BASE_SERVICE_NAME"
    relation-set dbname "$DBNAME"
}

USER=$(relation-get user) || {
    USER="$BASE_SERVICE_NAME"
    relation-set user "$USER"
}

HOST=$(options-get host) || true
if [ -z "$HOST" ]; then
    err "No host specified. Please specify ${WHITE}host${NORMAL}" \
        "in ${DARKYELLOW}$SERVICE_NAME${NORMAL}'s option."
    exit 1
fi

if [[ "$HOST" =~ :[0-9]+$ ]]; then
    PORT="${HOST##*:}"
    HOST="${HOST%:*}"
fi
if ! [[ "$HOST" =~ ^[0-9a-zA-Z.-]+$ ]]; then
    err "Invalid host specified: '$HOST'. Please provide a valid" \
        "network target as ${WHITE}host${NORMAL} value" \
        "in ${DARKYELLOW}$SERVICE_NAME${NORMAL}'s option."
    exit 1
fi

PORT=${PORT:-5432}

relation-set host "$HOST"
relation-set port "$PORT"

. lib/common

set -e

if ! PASSWORD="$(relation-get password 2>/dev/null)"; then
	err "Please provide a password"
	exit 1
fi

echo "SELECT 1;" | ddb "$DBNAME" || {
    err "Connection failed to $DBNAME on $HOST:$PORT with user $USER and given password"
    exit 1
}

array_read-0 extensions < <(relation-get extensions 2>/dev/null | shyaml get-values-0)

if [ "${#extensions[@]}" -gt 0 ]; then
    db_install_extensions "$DBNAME" "${extensions[@]}" || exit 1
fi