#!/usr/bin/env bash
#
# Main entry script for dotbare, used to route command to appropriate scripts
#
# @params
# Globals
#   ${mydir}: string, directory of the executing script, used for sourcing helpers
#   ${action_command}: string, determine which script to call
# Arguments
#   action_command: sub commands dotbare should run
#     General git command: log, status etc
#     dotbare specific commands: fadd | frm | fpop | freset | fcheckout | help etc
#   option flags:
#     check sub commands for available option flags

mydir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
source "${mydir}"/helper/set_variable.sh

function usage() {
  echo -e "Usage: dotbare [-h] [COMMANDS] [OPTIONS] ...\n"
  echo -e "Interactively manage dotfiles with the help of fzf and git bare repo"
  echo -e "To see all dotbare specific COMMANDS, run dotbare without any arguments\n"
  echo -e "dotbare is just a wrapper around git hence all git commands will function"
  echo -e "normally, just replace git with dotbare (e.g. dotbare commit -m 'message')."
  echo -e "dotbare added couple useful scripts starting with 'f' prefix to help you"
  echo -e "manage your interact with your git bare repo a little easier with the help of fzf\n"
  echo -e "optional arguments:"
  echo -e "  -h\t\tshow this help message and exit"
  echo -e "Available commands:"
  echo -e "  Any git commands, treat dotbare as git"
  echo -e "  fadd      \t\tstage modified file interactively"
  echo -e "  funtrack  \t\tuntrack file interactively"
  echo -e "  fstash    \t\tmanage stash interactively"
  echo -e "  fcheckout \t\tcheckout branch/files/commits interactively"
  echo -e "  fstat     \t\tstage/unstage interactively"
  echo -e "  fedit     \t\tselect files/commits and edit interactively"
  echo -e "  flog      \t\tmanage commits interactively"
  echo -e "  fbackup   \t\tperform backup for tracked dotfiles"
  echo -e "  fupgrade  \t\tupdate dotbare to the latest version"
  echo -e "  finit     \t\tinitialise/migrate dotbare"
  echo -e "  help      \t\tshow this help message and exit"
}

# if no argument, display all possible actions
# disbale shell check for ls, we are not processing
if [[ $# -eq 0 ]]; then
  # shellcheck disable=SC2012
  ls "${mydir}"/scripts \
    | fzf --no-multi --header='Available commands' --preview="dotbare {} -h" \
    | xargs -I __ dotbare __ -h
  exit 0
fi

# shellcheck disable=SC2199
[[ "$@" == 'add --all' ]] && \
  echo 'If you intend to stage all modified file, run dotbare add -u' && \
  echo "dotbare disabled add --all option as this will stage every single file in ${DOTBARE_TREE}" && \
  exit 1

action_command=''
case "$1" in
  fadd)
    action_command='fadd'
    shift
    ;;
  funtrack)
    action_command='funtrack'
    shift
    ;;
  fstash)
    action_command='fstash'
    shift
    ;;
  freset)
    action_command='freset'
    shift
    ;;
  fcheckout)
    action_command='fcheckout'
    shift
    ;;
  fstat)
    action_command='fstat'
    shift
    ;;
  fedit)
    action_command='fedit'
    shift
    ;;
  flog)
    action_command="flog"
    shift
    ;;
  fbackup)
    action_command="fbackup"
    shift
    ;;
  finit)
    action_command='finit'
    shift
    ;;
  fupgrade)
    action_command='fupgrade'
    shift
    ;;
  help)
    usage
    exit 0
    ;;
  -h)
    usage
    exit 0
    ;;
esac

if [[ -z "${action_command}" ]]; then
  /usr/bin/git --git-dir="${DOTBARE_DIR}" --work-tree="${DOTBARE_TREE}" "$@"
else
  # run the scripts
  "${mydir}/scripts/${action_command}" "$@"
fi