#!/bin/bash

# fail on error , debug all lines
# set -eu -o pipefail

cecho () {
 
    declare -A colors;
    colors=(\
        ['black']='\E[0;47m'\
        ['red']='\E[0;31m'\
        ['green']='\E[0;32m'\
        ['yellow']='\E[0;33m'\
        ['blue']='\E[0;34m'\
        ['magenta']='\E[0;35m'\
        ['cyan']='\E[0;36m'\
        ['white']='\E[0;37m'\
    );
 
    local defaultMSG="No message passed.";
    local defaultColor="black";
    local defaultNewLine=true;
 
    while [[ $# -gt 1 ]];
    do
    key="$1";
 
    case $key in
        -c|--color)
            color="$2";
            shift;
        ;;
        -n|--noline)
            newLine=false;
        ;;
        *)
            # unknown option
        ;;
    esac
    shift;
    done
 
    message=${1:-$defaultMSG};   # Defaults to default message.
    color=${color:-$defaultColor};   # Defaults to default color, if not specified.
    newLine=${newLine:-$defaultNewLine};
 
    echo -en "${colors[$color]}";
    echo -en "$message";
    if [ "$newLine" = true ] ; then
        echo;
    fi
    tput sgr0; #  Reset text attributes to normal without clearing screen.
 
    return;
}
 
warn () {
 
    cecho -c 'yellow' "Warn: $@";
}
 
error () {
 
    cecho -c 'red' "Erro: $@";
}
 
info () {
 
    cecho -c 'green' "Info: $@";
}

################################################################################
###
############### function to disable Raspberry Pi onboard bluetooth #############
###
################################################################################
function disable-onboard-bluetooth()
{
    info "Disabling onboard bluetooth"
    isInFile=$(cat /etc/modprobe.d/raspi-blacklist.conf | grep -c "blacklist btbcm")
    if [ $isInFile -eq 0 ]; then
        sudo bash -c 'echo "blacklist btbcm" >> /etc/modprobe.d/raspi-blacklist.conf'
    fi
    isInFile=$(cat /etc/modprobe.d/raspi-blacklist.conf | grep -c "blacklist hci_uart")
    if [ $isInFile -eq 0 ]; then
        sudo bash -c 'echo "blacklist hci_uart" >> /etc/modprobe.d/raspi-blacklist.conf'
    fi
}

function install-prerequisites()
{
info 'installing the must-have pre-requisites'

sudo apt-get install -y ofono
if [ $? != 0 ]; then
    sudo apt-get install ./bin/ofono_1.21-1_armhf.deb -y
    sudo apt-get install ./bin/libasound2-plugins_1.1.8-1_armhf.deb -y
    sudo apt-get install ./bin/rtkit_0.11-6_armhf.deb -y
fi

while read -r p ; do sudo apt-get install -y $p ; done < <(cat << "EOF"
   pulseaudio
   pulseaudio-module-bluetooth
EOF
)
}

function remove-pkg()
{
    info 'rempving bluealsa'
    sudo apt-get purge bluealsa -y
}

function enable-headset-ofono()
{
    info 'enable headset ofono'
    sudo sed -i '/^load-module module-bluetooth-discover/ s/$/ headset=ofono/' /etc/pulse/default.pa
}

function install_python_pkg()
{
    info 'installing python libraries'
    pip install pexpect
    pip3 install pexpect
}

# main

sudo -n true
test $? -eq 0 || exit 1 "you should have sudo priveledge to run this script"

#
disable-onboard-bluetooth
install-prerequisites
remove-pkg
enable-headset-ofono
install_python_pkg

echo installing the nice-to-have pre-requisites
echo you have 5 seconds to reboot
echo or
echo hit Ctrl+C to quit
echo -e "\n"
sleep 5

sudo reboot