#!/bin/bash

# adding commands
usage() {
    # how to use this build script
    cat <<EOF
usage: $0 [-c][-l][-i s] s1 [s2....]
    s1, s2, etc.    the systems to build for (see -l)
Options:
  -c, --clean       cleans the bin folder of any existing builds
  -f, --force       same as clean but skips prompt
  -l, --list        list available systems to build for
  -s, --scp         will attempt to scp to aplicable devices
  -h, --help        display this message
EOF
}

list_systems() {
    # list available systems to build for
    cat <<EOF
Name (shorthand) SCP available? (y/n)
$0 Name or $0 (shorthand) will build for the device

RaspberryPi (rpi) y 
BeagleBone (bb) y
Desktop (d) n
Server (s) n
EOF
}

clean_builds() {
    # cleans old builds
    if [[ "$FORCE"=true ]] ; then
        printf 'Cleaning old builds... \n'
        rm -v bin/* 2>/dev/null
    else
        read -p "Clean old builds?(y/n) " -n 1 -r
        if [[ $REPLY =~ ^[Yy]$ ]] ; then
            rm -v bin/* 2>/dev/null
        fi
    fi
    printf 'Clean!\n'
}

create_build() {
    # create build for $1
    case $1 in
        'rpi' )
            printf 'Building for Raspberry Pi!\n'
            GARCH="arm64"
            PLATFORM="reactor"
            ;;
        'bb')
            printf 'Building for BeagleBone!\n'
            GARCH="arm"
            GARM="GOARM=7"
            PLATFORM="reactor"
            ;;
        's')
            printf 'Building for Server!\n'
            GARCH="amd64"
            PLATFORM="server"
            ;;
        'd')
            printf 'Building for Desktop!\n'
            GARCH="amd64"
            PLATFORM="server"
            ;;
        * )
            printf 'ERROR: %s type unrecognized!\n' "$1"
            usage
            exit 1
            ;;
    esac
    # setting up build
    OUTFILE=$(printf '%s_linux_%s' "$PLATFORM" "$GARCH")
    INFILE=$(printf '%s/main.go' "$PLATFORM")
    # building
    env GOOS=linux GOARCH="$GARCH" $GARM go build -o bin/"$OUTFILE" cmd/"$INFILE"
    echo "Finished"
    if [[ "$SCP"=true ]] ; then
        printf 'Attempting to transfer to %s\n' "$2"
        if [[ "$1" == "bb" ]] ; then
            printf 'Copying to %s\n' "192.168.100.90"
            scp "$HOME/FRMS/bin/$OUTFILE" debian:~/
        else
            printf 'SCP Not available!\n'
        fi
    fi
}

# handle long form
for arg in "$@"; do
    shift
    case "$arg" in
        '--help')       set -- "$@" "-h"    ;;
        '--list')       set -- "$@" "-l"    ;;
        '--scp')        set -- "$@" "-s"    ;;
        '--clean')      set -- "$@" "-c"    ;;
        '--force')      set -- "$@" "-f"    ;;
        *)              set -- "$@" "$arg"  ;;
    esac
done

# handle args
while getopts "lcsfh" opt ; do
    case "$opt" in
        'h' )
            usage
            exit 0
            ;;
        'c' )
            clean_builds
            ;;
        'f' )
            FORCE=true
            clean_builds
            ;;
        's' )
            SCP=true
            ;;
        'l')
            list_systems
            ;;
        '?' )
            usage
            exit 1
            ;;
    esac
done

shift $(($OPTIND - 1))

for dev in "$@"; do
    case "$dev" in
        'RaspberryPi')  dev='rpi'   ;;
        'BeagleBone')   dev='bb'    ;;
        'Server')       dev='s'     ;;
        'Desktop')      dev='d'     ;;
    esac
    create_build "$dev"
done
printf 'Nothing else to do!\n'

# echo "Compressing binaries for distrubution"
# tar -czf pireactor.tar.gz  -C bin reactor_linux_arm64
# tar -czf bbreactor.tar.gz  -C bin reactor_linux_arm
# tar -czf server.tar.gz     -C bin server_linux_amd64
# tar -czf tui.tar.gz        -C bin tui_linux_amd64 tui_linux_arm tui_linux_arm64