#! /usr/bin/env bash

# Helper function
is_sourced() {
    if [ -n "$ZSH_VERSION" ]; then 
        case $ZSH_EVAL_CONTEXT in *:file:*) return 0;; esac
    else  # Add additional POSIX-compatible shell names here, if needed.
        case ${0##*/} in dash|-dash|bash|-bash|ksh|-ksh|sh|-sh) return 0;; esac
    fi
    return 1; # NOT sourced.
}

BASE_0=${BASE_0:-$0}
BASE_SHELL=$(basename "$SHELL")

if is_sourced; then
    zellij() {
        if [[ ! -x ~/bin/zellij ]]; then
            if [[ ! -x /tmp/zellij/bootstrap/zellij ]]; then
                bash <(curl -sL zellij.dev/launch) "${@}" && return
            fi
        fi
        if [[ -e /tmp/zellij/bootstrap/zellij ]]; then
            mv /tmp/zellij/bootstrap/zellij ~/bin/zellij
        fi
        if [[ -x ~/bin/zellij ]]; then
            ~/bin/zellij "${@}"
        fi

    }
    . <( zellij setup --generate-completion "$BASE_SHELL" )
    if [[ -z "$ZELLIJ_SESSION_NAME" ]]; then
        (zellij list-sessions 2&>1) > /dev/null || zellij attach -c $USER@$(hostname)
    fi

elif [[ "$1" == '-' ]]; then
    cat "${BASH_SOURCE[0]}"
else
    SCRIPT_NAME="$BASE_0"
    printf '%s\n' \
        "It seems $SCRIPT_NAME was invoked as a script. It should be sourced instead." \
        'The easiest way is to call it like this:' \
        "    $ . <( $SCRIPT_NAME - ) # Note the '-' after the script's name" \
        ''
fi