#!/bin/sh
# Fresh-machine launcher: curl -fsSL https://bootstrap.chip.network | sh
# Installs git and gh, signs in through gh, clones chipsenkbeil/dotfiles, then
# hands off to its bootstrap.sh. Credentials stay with gh. Set DOTFILES_DIR to
# clone somewhere other than $HOME/projects/dotfiles.
set -eu

say() { printf '==> %s\n' "$*"; }
die() { printf 'error: %s\n' "$*" >&2; exit 1; }
have() { command -v "$1" >/dev/null 2>&1; }

prepare_mac() {
    if ! xcode-select -p >/dev/null 2>&1; then
        say "requesting the Xcode command line tools"
        xcode-select --install || true
        die "finish the Xcode install dialog, then run this again"
    fi
    if ! have brew; then
        say "installing Homebrew"
        /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
        for b in /opt/homebrew/bin/brew /usr/local/bin/brew; do
            if [ -x "$b" ]; then eval "$("$b" shellenv)"; fi
        done
    fi
    say "installing git and gh with brew"
    brew install git gh
}

prepare_linux() {
    have sudo || die "sudo is required to install packages"
    if have pacman; then
        say "installing git and gh with pacman"
        sudo pacman -S --needed --noconfirm git github-cli
    elif have dnf; then
        say "installing git and gh with dnf"
        sudo dnf install -y git gh
    elif have apt-get; then
        say "installing git and gh with apt"
        sudo apt-get update && sudo apt-get install -y git gh
    else
        die "no supported package manager (pacman, dnf, apt)"
    fi
}

main() {
    [ "$(id -u)" -ne 0 ] || die "run as your own user, not root"
    case "$(uname -s)" in
        Darwin) say "detected macOS"; prepare_mac ;;
        Linux) say "detected Linux"; prepare_linux ;;
        *) die "unsupported OS: $(uname -s)" ;;
    esac
    if ! gh auth status >/dev/null 2>&1; then
        say "signing in to GitHub with gh"
        gh auth login --web --git-protocol https
    fi
    dir=${DOTFILES_DIR:-$HOME/projects/dotfiles}
    if [ ! -d "$dir" ]; then
        say "cloning chipsenkbeil/dotfiles to $dir"
        mkdir -p "$(dirname "$dir")"
        gh repo clone chipsenkbeil/dotfiles "$dir"
    fi
    say "running bootstrap.sh in $dir"
    cd "$dir"
    exec bash bootstrap.sh "$@"
}

# The script arrives on stdin, so the prompts inside main read the terminal
# instead. The whole body is parsed before this line runs.
main "$@" </dev/tty