#!/usr/bin/env bash
# This is NOT a script for execution, but for loading functions, so NOT need execution permission.
# NOTE that you NOT need to `cd ..' because the `$0' is NOT this file, but the script file which will source this file.

# The script that use this file should have two lines on its top as follows:
# cd "$(dirname "$0")" export base="$(pwd)"
showhelp(){
echo -e "Syntax: $0 [Options]...

Idempotent installation script for dotfiles.
If no option is specified, run default install process.

  -h, --help         Print this help message and exit
  -f, --force        (Dangerous) Force mode without any confirm
  -c, --clean        Clean the build cache first
  -k, --kbset <set>  (Unavailable yet) Use a set of pre-defined keybindings
"
}

cleancache(){
  rm -rf "$base/cache"
}

# `man getopt` to see more
para=$(getopt \
       -o hfk:c \
       -l help,force,kbset:,clean \
       -n "$0" -- "$@")
[ $? != 0 ] && echo "$0: Error when getopt, please recheck parameters." && exit 1
#####################################################################################
## getopt Phase 1
# ignore parameter's order, execute options below first
eval set -- "$para"
while true ; do
  case "$1" in
    -h|--help) showhelp;exit;;
    -c|--clean) cleancache;shift;;
    --) break ;;
    *) shift ;;
  esac
done
#####################################################################################
## getopt Phase 2
eval set -- "$para"
while true ; do
  case "$1" in
    ## Already processed in phase 1, but not exited
    -c|--clean) shift;;
    ## Ones without parameter
    -f|--force) ask=false;shift;;
    ## Ones with parameter
    
    -k|--kbset)
    case $2 in
      "normal") kbname="Normal style";;
      "vim") kbname="Vim-style";;
      *) echo -e "Wrong argument for $1.";exit 1;;
    esac;echo "The keyboardset is ${kbname}.";shift 2;;

    ## Ending
    --) break ;;
    *) echo -e "$0: Wrong parameters.";exit 1;;
  esac
done