#!/usr/bin/env bash

if [[ $(uname) == 'Darwin' ]]; then
    if ! command -v brew &>/dev/null
    then
        # We need to update bash, so we'll start with setting up homebrew.
        ./macos/pre_install
        exit
    fi
fi

source "script_helpers/printing.sh"
source "script_helpers/core.sh"
source "script_helpers/platform.sh"
source "script_helpers/file_ops.sh"

dotfiles_dir=$PWD
os_is_windows is_windows
os_is_macos is_macos
os_is_linux is_linux

# Check for admin permissions when running on Windows.
if [[ $is_windows -eq 1 ]]; then
    # `openfiles` is a command present on all supported Windows versions,
    # requires admin privileges, and has no side effects.
    openfiles &>/dev/null
    admin_error=$?
    if [[ ! $admin_error -eq 0 ]]; then
        fatal "You need to run this in an admin shell!"
    fi
fi

set -e

####################################################################################################
# Helpers
####################################################################################################

use_shell() {
    shell=$1
    if hash chsh >/dev/null 2>&1; then
        printf "\n${BLUE}Changing the default shell to $shell${NORMAL}\n"
        chsh -s $(which $shell)
    else
        error "\nUnable to change the shell because this system does not have chsh.\n"
    fi
}

setup_zsh() {
    printf "${MAGENTA}==> ${NORMAL}Setting up zsh...\n"

    if [[ $is_linux -eq 1 ]]; then
        sudo apt install zsh
    fi
}

####################################################################################################
# Setup
####################################################################################################

pushd "$HOME" &>/dev/null

set +e
git_comp_filename=".git-completion.bash"
printf "${MAGENTA}==> ${NORMAL}Downloading Git completion list to ${YELLOW}$PWD/$git_comp_filename${NORMAL}\n"
curl https://raw.githubusercontent.com/git/git/master/contrib/completion/git-completion.bash -o $git_comp_filename
set -e

#########################
# Setup platform files
#########################

if [[ $is_macos -eq 1 ]]; then
    printf "\n${BOLD}Setting up MacOS${NORMAL}\n\n"
    $dotfiles_dir/macos/install
    # might just switch back to bash since the zsh stuff is ancient.
    setup_zsh
    use_shell zsh

elif [[ $is_linux -eq 1 ]]; then
    printf "\n${BOLD}Setting up Linux${NORMAL}\n\n"
    $dotfiles_dir/linux/install
    use_shell bash
fi

popd "$HOME" &>/dev/null

printf "${BOLD}${GREEN}Done!${NORMAL}\n"