#!/usr/bin/env bash

# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# what:        ct - for caretaker
# author:      fk
# started:     may 2024
#
# nifty:        https://github.com/dylanaraps/pure-bash-bible
#
# requires:    tree, wget
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

#############################################################################
#
#   WARNING: EXAMINE THE CONTENT BEFORE EXECUTION. RUN AT YOUR OWN RISK.
#
#############################################################################
echo "<< ct.sh >>"

base_url=https://gt.op.fo/fro/lnx-arch/raw/branch/master
scripts_url=${base_url}/scripts
home_dir=/usr/local/bin
this_file=ct.sh


# https://stackoverflow.com/questions/18215973/how-to-check-if-running-as-root-in-a-bash-script
if [ $(id -u) -ne 0 ]
  then echo "error: run as 'root'"
  exit
fi

this_file_name=`basename "$0"`
if [ $# -lt 1 ]; then
    echo "usage: '$this_file_name { dots | dots+ | uf / upd-full [host]? | sw / software {update/install/search/orphans/uninstall} [host]? | us / upd-self | yay }'"
    exit 1
fi

operation=$1
parameter_1=$2
parameter_2=$3

shopt -s extglob
case $operation in
    !(dots|dots+|uf|upd-full|services|sw|software|us|upd-self|yay))
        echo "error: unknown operation '$operation'"
        exit
        ;;
esac
shopt -u extglob

# ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

# helper function
execute_script() {
    file=$1
    parameter_1=$2
    parameter_2=$3
    echo "execute: ${file} ${parameter_1} ${parameter_2}"
    resource_url=${scripts_url}/${file}

    if ! wget -q --method=HEAD ${resource_url};
    then
        echo "error: unable to load '${resource_url}'"
        echo ""
        wget -v ${resource_url}
        echo ""
        echo "if the error is caused by an untrusted certificate, you can continue ignoring the untrusted cert. press enter to continue or type any character to stop."
        read user_input
        if [[ ${user_input} == "" ]]; then
            echo "ok. we will continue with wget's '--no-check-certificate' flag activated."
        echo ""
        else
            echo "ok. we will stop here."
            exit
        fi
    fi

    wget --no-check-certificate -q ${resource_url} -O /tmp/${file}
    chmod 755 /tmp/*.sh
    /tmp/${file} ${parameter_1} ${parameter_2}
}

# ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

# update dot files
shopt -s extglob
if [ $operation == "dots" ] ; then

    execute_script 99_deploy.sh dots

fi
shopt -u extglob

# update dots+ (wallpapers, fonts, ++)
shopt -s extglob
if [ $operation == "dots+" ] ; then

    execute_script 99_deploy.sh dots+

fi
shopt -u extglob

# enable services
shopt -s extglob
if [ $operation == "services" ] ; then

    if [ -z "${parameter_1}" ]; then
        parameter_1=services
    fi

    if [ $parameter_1 == "services" ] ; then
        if [ -z "${parameter_2}" ]; then
            parameter_2=$HOSTNAME
        fi
    fi

    execute_script 99_software.sh "${parameter_1}" "${parameter_2}"

fi
shopt -u extglob

# install software (update system)
shopt -s extglob
if [ $operation == "sw" ] || [ $operation == "software" ] ; then

    if [ -z "${parameter_1}" ]; then
        parameter_1=update
    fi

    if [ $parameter_1 == "update" ] ; then
        if [ -z "${parameter_2}" ]; then
            parameter_2=$HOSTNAME
        fi
    fi

    execute_script 99_software.sh "${parameter_1}" "${parameter_2}"

fi
shopt -u extglob

# self update, by re-downloading and overwriting itself
shopt -s extglob
if [ $operation == "us" ] || [ $operation == "upd-self" ] ; then

    wget --no-check-certificate -v ${base_url}/scripts/${this_file} -O ${home_dir}/${this_file}.tmp
    cp ${home_dir}/${this_file}.tmp ${home_dir}/${this_file}
    rm ${home_dir}/${this_file}.tmp
    chmod 755 ${home_dir}/*.sh

fi
shopt -u extglob

# full update: install software and update dots
shopt -s extglob
if [ $operation == "uf" ] || [ $operation == "upd-full" ] ; then

    if [ -z "${parameter_1}" ]; then
        parameter_1=$HOSTNAME
    fi

    if [ -z "${parameter_1}" ]; then
        echo "error: missing host name"
        exit 1
    fi

    ${home_dir}/${this_file} software update ${parameter_1}
    ${home_dir}/${this_file} dots

fi
shopt -u extglob

# install yay
shopt -s extglob
if [ $operation == "yay" ] ; then

    execute_script 99_yay.sh

fi
shopt -u extglob