#!/bin/bash

list_available() {
    available=$(find $HOME/.sheerka_* -maxdepth 0 -type d | awk -F_ '{ print "    "$2}') 2> /dev/null

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

}

usage() {
    echo "Usage: $0 [environment]"
    echo "Resetting Sheerka environment from a previously build."
    echo "If no environment is set, create a fresh install of Sheerka from scratch."
    list_available
    exit 0
}

if [ "$1" = "-h" ]; then
    usage
fi

# No environment provided.
# Create a new environment from scratch (by simply removing .sheerka folder)
if [ "$#" -eq 0 ]; then
    echo "Resetting Sheerka environment."
    rm -rf ~/.sheerka
    exit 0
fi

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

echo "Resetting Sheerka environment to '$1'."
rm -rf ~/.sheerka
cp -r "$HOME/.sheerka_$1" ~/.sheerka