#!/bin/sh

error_exit() {
    echo "Failed to add \"aquote show\""
    exit 1
}

detect_shell() {
    case "$SHELL" in
        */bash ) echo "bash";;
        */zsh ) echo "zsh";;
        */fish ) echo "fish";;
    esac
}

add_for_bash() {
    echo "Adding \"aquote show\" to \"$HOME/.bashrc\""
}

add_for_zsh() {
    echo "Adding \"aquote show\" to \"$HOME/.zshrc\""
}

add_for_fish() {
    echo "Adding \"aquote show\" to \"$HOME/.config/fish/functions/fish_greeting.fish\""
}

add_shell_greeting() {
    case $(detect_shell) in
        bash ) add_for_bash;;
        zsh ) add_for_zsh;;
        fish ) add_for_fish;;
    esac
}

case $(detect_shell) in
    bash ) prompt_msg='Add "aquote show" to .bashrc? [Y/n] ';;
    zsh ) prompt_msg='Add "aquote show" to .zshrc? [Y/n] ';;
    fish ) prompt_msg='Add "aquote show" to fish_greeting.fish? [Y/n] ';;
esac

if [ -n "$prompt_msg" ]; then
    while true; do
        read -p "$prompt_msg" yn
        case $yn in
            [Yy]* ) add_shell_greeting; break;;
            [Nn]* ) echo '"aquote show" is not added'; break;;
            ?* ) echo "Please answer yes or no";;
            * ) add_shell_greeting; break;;
        esac
    done
else
    echo "Unable to automatically add \"aquote show\" for your shell, please add it manually"
fi