#!/bin/bash

# Where in the world is bootstrap?
BOOTSTRAP_ARCHIVE="https://github.com/br0ns/bootstrap/archive/master.zip"

THISDIR="$(dirname "$(realpath "$0")")"
export BOOTSTRAP_ALL=true

# Fail on any error
set -e

# Packages needed for Bootstrap to work
REQUIREMENTS=(
    ca-certificates
    unzip
    wget
    whiptail
)

# If this file does not exist it's probably because we're bootstrapping a fresh
# system.  So we download the Git repository and bootstrap from there
if [ ! -e "$THISDIR/bs.sh" ] ; then
    # Required packages
    for pkg in $REQUIREMENTS ; do
        if ! dpkg --status $pkg >/dev/null 2>&1 ; then
            echo Installing $pkg
            sudo CHECK_PKGS_DONT_RUN=1 apt-get install --yes --no-install-recommends $pkg
        fi
    done

    echo -e "Downloading \x1b[32m$BOOTSTRAP_ARCHIVE\x1b[m => \x1b[32m$PWD/\x1b[m"
    wget "$BOOTSTRAP_ARCHIVE"
    unzip master.zip && rm master.zip
    # Overwrite this script with a symlink to it inside the downloaded repo, so
    # subsequent runs won't download it again
    BSDIR="$(realpath "$PWD"/bootstrap-master)"
    ln -sf "$BSDIR"/bootstrap "$0"
else
    BSDIR="$THISDIR"
fi

# Build menu for whiptail showing all the steps
OPTS=()
OPTN=0
for f in $(ls "$BSDIR" | sort -n) ; do
    p="$BSDIR/$f"
    # Path must be a file (-f) which starts with a digit
    [[ "$f" =~ ^[0-9] ]] && [ -f "$p" ] || continue
    # Executable (-x) files are selected by default
    if [ -x "$p" ] ; then
        s=on
    else
        s=off
    fi
    OPTS+=("$p" "$f" "$s")
    OPTN=$((OPTN+1))
done

ROWS=$(tput lines 2>/dev/null || echo 25)
COLS=72

SLACK=7
MAXOPTN=$((ROWS-SLACK))
if [ $OPTN -gt $MAXOPTN ] ; then
    OPTN=$MAXOPTN
else
    ROWS=$((OPTN+SLACK))
fi

STEPS=$(whiptail --separate-output --notags --checklist \
                 "Select steps:" \
                 $ROWS \
                 $COLS \
                 $OPTN \
                 "${OPTS[@]}" 2>&1 >/dev/tty)

for p in ${STEPS[@]} ; do
    "$p" "$@"
done

exit 0