#!/bin/bash
set -e

BASEDIR=$(dirname "$0")

list_available() {
    available=$(find "$SHEERKA_BACKUP_FOLDER"/*.sb -type f -printf "%f\n" | sed 's/\.[^.]*$//') 2> /dev/null

    if [ "$available" = "" ]; then
        echo "Error. No available backup !" >&2
    else
        echo "Available backups are:"
        for backup in ${available}; do
            echo "    ${backup}";
        done
    fi

}

usage() {
    echo "Usage: $0 <backup>"
    echo "Creates a fresh install of Sheerka, using the provided backup file."
    list_available
    exit 0
}

if [ "$#" -eq 0 ] ||  [ "$1" = "-h" ]; then
    usage
fi


if [ -z "${SHEERKA_BACKUP_FOLDER+x}" ]; then
    echo "SHEERKA_BACKUP_FOLDER is not set !"
    exit 1
fi


backup_file="$SHEERKA_BACKUP_FOLDER"/"$1".sb
sheerka_root_folder="$HOME/.sheerka_$1"

if ! [ -e "$backup_file" ]; then
    echo "$backup_file not found" >&2
    list_available
    exit 1
fi

echo "Rebuilding $1..."

# backup current sheerka
if [ -e ~/.sheerka ]; then
    rm -rf ~/.sheerka.bak
    mv  ~/.sheerka ~/.sheerka.bak
fi

# re-install sheerka, using the requested backup file
python "$BASEDIR"/../main.py "sheerka.restore('$1')"

# create a copy of the freshly installed sheerka, for future reset
rm -rf "$sheerka_root_folder"
cp -R ~/.sheerka "$sheerka_root_folder"