#!/bin/sh

MAIN_REPO="/volume1/Restic-Main/restic-repository/"
MAIN_PASSWORD="..."
SECONDARY1_REPO="/volume1/Restic-secondary1/restic-repository/"
SECONDARY1_PASSWORD="...."
SECONDARY2_REPO="/volume1/Restic-secondary2/restic-repository/"
SECONDARY2_PASSWORD="..."


function backupNAS {
    export RESTIC_REPOSITORY="${MAIN_REPO}"
    export RESTIC_PASSWORD="${MAIN_PASSWORD}"

    ./restic backup --retry-lock 1m /volume1/ --no-scan --exclude-caches --exclude-file .restic-exclude-file

    export RESTIC_REPOSITORY=""
    export RESTIC_PASSWORD=""
}


function forgetMainRepo {
    export RESTIC_REPOSITORY="${MAIN_REPO}"
    export RESTIC_PASSWORD="${MAIN_PASSWORD}"

    ./restic forget --retry-lock 1m --compact --keep-within 14d --keep-within-hourly 30d --keep-within-daily 100d --keep-within-weekly 365d --keep-monthly unlimited

    export RESTIC_REPOSITORY=""
    export RESTIC_PASSWORD=""
}


function copyToMainRepo {
    export RESTIC_REPOSITORY="${MAIN_REPO}"
    export RESTIC_PASSWORD="${MAIN_PASSWORD}"
    export RESTIC_FROM_REPOSITORY="${1}"
    export RESTIC_FROM_PASSWORD="${2}"

    ./restic copy --retry-lock 1m

    export RESTIC_REPOSITORY=""
    export RESTIC_PASSWORD=""
    export RESTIC_FROM_REPOSITORY=""
    export RESTIC_FROM_PASSWORD=""
}


function forgetRemoteRepo {
    export RESTIC_REPOSITORY="${1}"
    export RESTIC_PASSWORD="${2}"

    ./restic forget --prune --keep-last 10 --compact --retry-lock 1m

    export RESTIC_REPOSITORY=""
    export RESTIC_PASSWORD=""
}


function removeStaleLocks {
    export RESTIC_REPOSITORY="${1}"
    export RESTIC_PASSWORD="${2}"

    ./restic unlock

    export RESTIC_REPOSITORY=""
    export RESTIC_PASSWORD=""
}


export GOMEMLIMIT=800MiB
export RESTIC_CACHE_DIR=/volume1/Backups/.cache/restic

removeStaleLocks "${MAIN_REPO}" "${MAIN_PASSWORD}"

backupNAS

removeStaleLocks "${SECONDARY1_REPO}" "${SECONDARY1_PASSWORD}"
copyToMainRepo   "${SECONDARY1_REPO}" "${SECONDARY1_PASSWORD}"

removeStaleLocks "${SECONDARY2_REPO}" "${SECONDARY2_PASSWORD}"
copyToMainRepo   "${SECONDARY2_REPO}" "${SECONDARY2_PASSWORD}"

forgetRemoteRepo "${SECONDARY1_REPO}" "${SECONDARY1_PASSWORD}"
forgetRemoteRepo "${SECONDARY2_REPO}" "${SECONDARY2_PASSWORD}"
forgetMainRepo

./restic cache --cleanup --max-age 28
./restic self-update