#!/bin/bash

CFG="$HOME/.config/obt.conf"

# ensure config file exists
mkdir -p "$(dirname "$CFG")"
[[ -e $CFG ]] || touch "$CFG"

read -r ADDR < "$CFG"

init() {
    # save address if not set and argument is not a command
    if [[ -z $ADDR && $1 != c && $1 != d ]]; then
        ADDR=$1
        echo "$ADDR" > "$CFG"
    fi

    echo "trusting..."
    bluetoothctl trust "$ADDR"
    echo "pairing..."
    bluetoothctl pair "$ADDR"
    echo "done!"
}

connect() {
    bluetoothctl connect "$ADDR"
}

disconnect() {
    bluetoothctl disconnect "$ADDR"
}

usage() {
    echo "usage:"
    echo "  $0 <BT_ADDRESS>   # pair + trust + save"
    echo "  $0 c              # connect"
    echo "  $0 d              # disconnect"
    exit 1
}

[[ $# -eq 0 ]] && usage

case "$1" in
    c)
        [[ -z $ADDR ]] && echo "no saved address" && exit 1
        connect
        ;;
    d)
        [[ -z $ADDR ]] && echo "no saved address" && exit 1
        disconnect
        ;;
    *)
        init "$1"
        ;;
esac