#!/bin/bash

# curl -X POST -H "Content-Type: application/json" -d '{"path":"/","tag":"test3","request_id":"1","version":0}' http://127.0.0.1:9000/hooks/queue-restic-snapshot

pipe="/tmp/restic/snapshot_trigger_pipe"
if [ ! -p "$pipe" ]; then
    mkdir -p "/tmp/restic"
    mkfifo "$pipe"
    chmod 777 -R "/tmp/restic" # TODO fix this, the webhook web server runs as a user that can access this otherwise
fi

# keep pipe open
exec 3<"$pipe"

while read -u 3 msg; do
    ghost_db_running=false
    nassella_lldap_db_running=false
    nassella_authelia_db_running=false
    nassella_db_running=false
    nextcloud_db_running=false
    nextcloud_redis_running=false

    IFS=$'\t' # set IFS to tab (IFS is the delimiter used to split strings when parsing in the shell)
    set -- $msg # this splits msg based on IFS (tab)
    tag=$1
    request_id=$2
    path=$3 # TODO not currently used

    # update status for webhooks
    printf "%s\n" "running" > "/tmp/restic/snapshot_status_$request_id"

    touch /app/maintenance/maintenance.on

    # shut down databases so we can get a clean snapshot
    if docker ps --filter "name=^app-ghost_db-1$" --filter "status=running" | grep -q app-ghost_db-1; then
        ghost_db_running=true
        docker stop app-ghost_db-1
    fi
    if docker ps --filter "name=^app-nassella_lldap_db-1$" --filter "status=running" | grep -q app-nassella_lldap_db-1; then
        nassella_lldap_db_running=true
        docker stop app-nassella_lldap_db-1
    fi
    if docker ps --filter "name=^app-nassella_authelia_db-1$" --filter "status=running" | grep -q app-nassella_authelia_db-1; then
        nassella_authelia_db_running=true
        docker stop app-nassella_authelia_db-1
    fi
    if docker ps --filter "name=^app-nassella_db-1$" --filter "status=running" | grep -q app-nassella_db-1; then
        nassella_db_running=true
        docker stop app-nassella_db-1
    fi
    if docker ps --filter "name=^app-nextcloud_db-1$" --filter "status=running" | grep -q app-nextcloud_db-1; then
        nextcloud_db_running=true
        docker stop app-nextcloud_db-1
    fi
    if docker ps --filter "name=^app-nextcloud_redis-1$" --filter "status=running" | grep -q app-nextcloud_redis-1; then
        nextcloud_redis_running=true
        docker stop app-nextcloud_redis-1
    fi

    # perform the snapshot
    docker run --rm --volume /nassella:/nassella --volume /restic-password:/restic-password -e AWS_ACCESS_KEY_ID=${AWS_ACCESS_KEY_ID} -e AWS_SECRET_ACCESS_KEY=${AWS_SECRET_ACCESS_KEY} -i restic/restic:0.18.0 backup --verbose --repo s3:${BACKBLAZE_BUCKET_URL} --password-file /restic-password --tag "$tag" "/nassella"

    # restart databases
    if [ $ghost_db_running = true ]; then
        docker start app-ghost_db-1
    fi
    if [ $nassella_lldap_db_running = true ]; then
        docker start app-nassella_lldap_db-1
    fi
    if [ $nassella_authelia_db_running = true ]; then
        docker start app-nassella_authelia_db-1
    fi
    if [ $nassella_db_running = true ]; then
        docker start app-nassella_db-1
    fi
    if [ $nextcloud_db_running = true ]; then
        docker start app-nextcloud_db-1
    fi
    if [ $nextcloud_redis_running = true ]; then
        docker start app-nextcloud_redis-1
    fi

    rm /app/maintenance/maintenance.on

    # update status for webhooks
    printf "%s\n" "complete" > "/tmp/restic/snapshot_status_$request_id"

done