#!/bin/sh

set -e

thrd_ctrl () {
    while true; do
        if ! kill -0 "$1" 2>/dev/null; then 
            printf "Parent process died, I'm going to die too...\n"
            exit 0
        fi
        sleep 1
    done > "$NPIPE_IN"
}

term_process () {
    if kill -0 "$PID_CTRL" 2>/dev/null; then
        printf "Killing child process \"thrd_ctrl\" (PID %s)...\n" "$PID_CTRL"
        kill "$PID_CTRL"
    fi
    #printf "Removing created FIFOs...\n"
    #rm "$NPIPE_IN"
    printf "Terminating the program...\n"
    exit 0
}

trap_ctrlc () {
    printf "Termination signal by the user (CTLR+C) detected...\n"
    term_process
}

trap_sigterm () {
    printf "Termination signal detected...\n"
    term_process
}

trap "trap_ctrlc" 2
trap "trap_sigterm" 15

_pipe_dir="${XDG_RUNTIME_DIR:-/tmp/$(id -u)-runtime}/acejuice"
mkdir -p "$_pipe_dir"
NPIPE_IN="$_pipe_dir/main.sock"
unset _pipe_dir

if ! mkfifo "$NPIPE_IN" 2> /dev/null; then
  printf "fifo '%s' already present\n" "$NPIPE_IN" >&2
fi

PID_SELF=$$

thrd_ctrl $PID_SELF &
PID_CTRL=$!

_monitor_list=""
_workspaces="..."
_date="..."
_battery="..."
_cputemp="..."
_network="..."
_audio="..."


__print_bar() {
    # Print anyway even when the monitor is not specified
    [ ! -n "$_monitor_list" ] && printf "%%{l}%s%%{c}%s%%{r}%s %s %s %s" "$_workspaces" "$_date" "$_cputemp" "$_network" "$_audio" "$_battery"
    for _monitor_name in $_monitor_list; do
        printf "%%{Sn%s}%%{l}%s%%{c}%s%%{r}%s %s %s %s" "$_monitor_name" "$_workspaces" "$_date" "$_cputemp" "$_network" "$_audio" "$_battery"
    done
    printf "\n"
}

msg_cmd_colon () {
    #printf "CMD: \"%s\"\nCONTENT: \"%s\"\n" "$1" "$2"
    case "$1" in
        ":SET")
            case "$2" in
                [A-Za-z0-9][A-Za-z0-9][A-Za-z0-9][A-Za-z0-9]" "*)
                    widget_content=${2##[A-Za-z0-9][A-Za-z0-9][A-Za-z0-9][A-Za-z0-9] }
                    #printf "WIDGET NAME: \"%s\"\nWIDGET CONTENT: \"%s\"\n" "${2% "$widget_content"}" "$widget_content"
                    case "${2% "$widget_content"}" in
                        "work")
                            _workspaces="${widget_content}"
                        ;;
                        "date")
                            _date="${widget_content}"
                        ;;
                        "cput")
                            _cputemp="${widget_content}"
                        ;;
                        "netw")
                            _network="${widget_content}"
                        ;;
                        "audi")
                            _audio="${widget_content}"
                        ;;
                        "batt")
                            _battery="${widget_content}"
                        ;;
                        *)
                            :
                        ;;
                    esac
                ;;
                *)
                    :
                ;;
            esac
        ;;
        ":UST")
            case "$2" in
                "work")
                    _workspaces=""
                ;;
                "date")
                    _date=""
                ;;
                "cput")
                    _cputemp=""
                ;;
                "netw")
                    _network=""
                ;;
                "audi")
                    _audio=""
                ;;
                "batt")
                    _battery=""
                ;;
                *)
                    :
                ;;
            esac
        ;;
        ":MON")
            case "$2" in
                "LIST "[A-Za-z0-9]*)
                    _monitor_list=${2##LIST }
                    #printf "MONITOR LIST: \"%s\"\n" "$_monitor_list"
                ;;
                "ADD")
                    :
                ;;
                "DEL")
                    :
                ;;
                *)
                    :
                ;;
            esac
        ;;
        *)
            :
        ;;
    esac
    __print_bar
}

while read -r line; do
    case "$line" in
        :[A-Za-z0-9][A-Za-z0-9][A-Za-z0-9]" "*)
            content=${line##:[A-Za-z0-9][A-Za-z0-9][A-Za-z0-9] }
            msg_cmd_colon "${line% "$content"}" "${content}"
        ;;
        *)
            :
            #printf "%s\n" "$line"
        ;;
    esac
done < "$NPIPE_IN"