#!/usr/bin/env bash
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
source "$SCRIPT_DIR/../lib/common.sh"

PLAN9_INSTALL_DIR="/usr/local/plan9"

log_info "Installing plan9port"

if [ -d "$PLAN9_INSTALL_DIR" ] && [ -f "$PLAN9_INSTALL_DIR/bin/9" ]; then
    log_success "plan9port already installed at ${PLAN9_INSTALL_DIR}"
    exit 0
fi

# Install build dependencies
log_info "Installing build dependencies"
if is_macos; then
    # macOS needs Xcode Command Line Tools
    if ! xcode-select -p >/dev/null 2>&1; then
        log_error "Xcode Command Line Tools required. Run: xcode-select --install"
        exit 1
    fi
elif is_debian; then
    maybe_sudo apt-get install -y build-essential libx11-dev libxt-dev libxext-dev libfontconfig1-dev
elif is_arch; then
    maybe_sudo pacman -S --noconfirm --needed base-devel xorg-server-devel fontconfig
fi

log_info "Cloning plan9port repository"
TEMP_DIR=$(mktemp -d)
cd "$TEMP_DIR"

if ! git clone https://github.com/9fans/plan9port.git plan9; then
    log_error "Failed to clone plan9port"
    rm -rf "$TEMP_DIR"
    exit 1
fi

cd plan9

log_info "Building plan9port (this may take a while)"
if ! ./INSTALL; then
    log_error "Failed to build plan9port"
    cd -
    rm -rf "$TEMP_DIR"
    exit 1
fi

log_info "Installing to ${PLAN9_INSTALL_DIR}"
cd ..
maybe_sudo mv plan9 "$PLAN9_INSTALL_DIR"

cd -
rm -rf "$TEMP_DIR"

log_success "plan9port installed to ${PLAN9_INSTALL_DIR}"
log_info "Add to environment:"
log_info "  export PLAN9=${PLAN9_INSTALL_DIR}"
log_info "  export PATH=\$PATH:\$PLAN9/bin"