#!/usr/bin/env bash

# Cleanup
set -e
trap 'exit 1' SIGINT

# Source library
LIBDIR="/usr/share/file-scripts/"

for f in "$LIBDIR"/*.sh; do
    source "${f}"
done

BOOT_DIR='/boot'
ETC_DIR='/etc'

# Helper functions
function help() {
cat << HELPMESSAGE
$(basename "$0") $MAJOR_VERSION.$MINOR_VERSION.$PATCH_VERSION

Usage: $(basename "$0") [-h|--help] [options] [patterns]

Options
  -h, --help            show this help message and exit
  -b, --boot            edit a file in /boot
  -d DIR, --dir DIR     edit a file in a given directory
  -E, --etc             edit a file in /etc
  -I, --no-ignore       do not respect .(git|fd)ignore files
  -i, --no-ignore-vcs   do not respect .gitignore files

Note that this script uses EDITOR to select an editor
HELPMESSAGE
}

while true; do
    case "${1}" in
        '-b'|'--boot')
            EDIT_BOOT=1
            shift
            continue
            ;;
        '-d'|'--dir')
            DIR="${2}"
            case "${DIR}" in
                "")
                    exit 1
                    ;;
                -*)
                    exit 1
                    ;;
            esac
            shift 2
            continue
            ;;
        --dir=*)
            DIR="${1#*=}"
            case "${DIR}" in
                "")
                    exit 1
                    ;;
                -*)
                    exit 1
                    ;;
            esac
            shift
            continue
            ;;
        '-E'|'--etc')
            EDIT_ETC=1
            shift
            continue
            ;;
        '-i'|'--no-ignore-vcs')
            NO_IGNORE_VCS=1
            shift
            continue
            ;;
        '-I'|'--no-ignore')
            NO_IGNORE=1
            shift
            continue
            ;;
        '-h'|'--help')
            help
            exit
            ;;
        --)
            shift
            break
            ;;
        -*)
            printf '%s\n' "Unknown option: ${1}" >&2
            exit 1
            ;;
        *)
            break
            ;;
    esac
done

# Handle -b and -E, they are mutually exclusive
if [[ -n $EDIT_BOOT && -z $EDIT_ETC ]]; then
    DIR="$BOOT_DIR"
elif [[ -z $EDIT_BOOT && -n $EDIT_ETC ]]; then
    DIR="$ETC_DIR"
elif [[ -n $EDIT_BOOT && -n $EDIT_ETC ]]; then
    printf '%s\n' 'Select either --boot or --etc, not both'
    exit 1
elif [[ -z $DIR ]]; then
    DIR='.'
fi

# Handle extra options
declare -a extra_opts

if [[ -n $NO_IGNORE ]]; then
    extra_opts+=('--no-ignore')
elif [[ -n $NO_IGNORE_VCS ]]; then
    extra_opts+=('--no-ignore-vcs')
fi

files="$(find_files $DIR "${extra_opts[@]}")"
selected_file="$(run_fzf "$files")"

if [[ -w "${selected_file}" ]]; then
    "$EDITOR" "$selected_file"
else
    sudo --edit "$selected_file"
fi