#!/bin/bash

# Variables
USERNAME=isabell
USER_HOME=$(getent passwd $SUDO_USER | cut -d: -f6)
VERS_CONFIG_PATH=$(dirname "${BASH_SOURCE[0]}")/../home-directory/.zshrc
HOME_CONFIG_PATH=$USER_HOME/.zshrc
ANTIGEN_PATH=$USER_HOME/.antigen

# check, if sudo
if [[ "$EUID" = 0 ]]; then
    echo "starting zsh setup install."
else
    sudo -k # make sure to ask for password on next sudo
    if sudo false; then
        echo "wrong password"
        exit 1
    fi
fi

# creating symlink for .zshrc config file
if [[ -f "$VERS_CONFIG_PATH" ]] && echo "Creating symlink from $HOME_CONFIG_PATH to $VERS_CONFIG_PATH"; then
    if [[ -f "$HOME_CONFIG_PATH" ]]; then
        ln -s "$HOME_CONFIG_PATH" "$VERS_CONFIG_PATH"
    else
        echo "$HOME_CONFIG_PATH already exists. Overwrite? (y/n)"
        read OVERWRITE
        if [[ "$OVERWRITE" == "y" ]]; then
            rm "$HOME_CONFIG_PATH"
            ln -s "$HOME_CONFIG_PATH" "$VERS_CONFIG_PATH"
        fi
    fi
else
    echo "$VERS_CONFIG_PATH missing. abort."
    exit 1
fi

# install software

## install zsh
if [ "$(dpkg -l | awk '/zsh/ {print }'|wc -l)" -ge 1 ]; then
    echo "zsh already installed. skipping"
else
    sudo apt update
    sudo apt install zsh -y
fi

## install antigen.zsh
if [[ -d "$ANTIGEN_PATH" ]]; then
    if [[ -f "$ANTIGEN_PATH/antigen.zsh" ]]; then
        echo "antigen already installed. skipping"
    else
        curl -L git.io/antigen > "$ANTIGEN_PATH/antigen.zsh"
    fi
else
    mkdir "$ANTIGEN_PATH"
    curl -L git.io/antigen > "$ANTIGEN_PATH/antigen.zsh"
fi

# set zsh as default shell
echo "setting zsh as default shell."
sudo -u "$USERNAME" chsh -s $(which zsh)

echo "done."