#!/usr/bin/env sh
# Bootstrap: curl -fsSL https://install.visudo.icu | sh
# Supports: curl -fsSL <url> | sh -s -- [install.sh flags...]
set -e

# --- Colors (POSIX-safe, respects NO_COLOR) ---

if [ -n "${NO_COLOR:-}" ] || [ ! -t 1 ]; then
	RED='' GREEN='' DIM='' NC=''
else
	RED='\033[0;31m'
	GREEN='\033[0;32m'
	DIM='\033[2m'
	NC='\033[0m'
fi

info()  { printf "  %b●%b %s\n" "$GREEN" "$NC" "$*"; }
error() { printf "  %b●%b %s\n" "$RED" "$NC" "$*" >&2; }

# --- Preflight ---

if [ "$(id -u)" = "0" ]; then
	error "Do not run this as root"
	exit 1
fi

if [ "$(uname)" != "Linux" ]; then
	error "This installer only supports Linux"
	exit 1
fi

if ! command -v bash >/dev/null 2>&1; then
	error "bash is required"
	exit 1
fi

if ! command -v curl >/dev/null 2>&1; then
	error "curl is required — install it first, then re-run"
	exit 1
fi

# --- Parse arguments ---

BASE_URL="${DOTFILES_URL:-https://install.visudo.icu}"
DOTFILES_DIR="$HOME/.dotfiles"
INSTALL_ARGS=""

while [ $# -gt 0 ]; do
	case "$1" in
		--dir|-d) DOTFILES_DIR="$2"; shift 2 ;;
		*)        INSTALL_ARGS="$INSTALL_ARGS $1"; shift ;;
	esac
done

# --- Download and extract ---

info "Downloading dotfiles..."

if [ -d "$DOTFILES_DIR" ]; then
	info "Existing install found at $DOTFILES_DIR — updating..."
	rm -rf "$DOTFILES_DIR"
fi

mkdir -p "$DOTFILES_DIR"
if ! curl -fsSL "$BASE_URL/dotfiles.tar.gz" | tar -xz -C "$DOTFILES_DIR"; then
	error "Failed to download or extract dotfiles from $BASE_URL/dotfiles.tar.gz"
	exit 1
fi

# --- Verify download integrity ---

if [ ! -f "$DOTFILES_DIR/install.sh" ]; then
	error "Download appears corrupted — install.sh not found in $DOTFILES_DIR"
	exit 1
fi

# --- Launch installer ---

info "Launching installer..."
printf "  %b%s%b\n\n" "$DIM" "$DOTFILES_DIR/install.sh$INSTALL_ARGS" "$NC"
# shellcheck disable=SC2086
exec bash "$DOTFILES_DIR/install.sh" $INSTALL_ARGS