#!/bin/bash
set -e

NODE_VERSION="${NODE_VERSION:-20}"
SKILLS_DIR="${SKILLS_DIR:-/skills}"
SKILL_DIR="$(dirname "$(dirname "$0")")"

# Idempotent Node.js installation
install_node() {
    if command -v node &>/dev/null; then
        echo "Node.js already installed: $(node --version)"
        return 0
    fi

    echo "Installing Node.js ${NODE_VERSION}..."

    # Install via NodeSource
    apt-get update
    apt-get install -y curl ca-certificates gnupg

    mkdir -p /etc/apt/keyrings
    curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg

    echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_${NODE_VERSION}.x nodistro main" > /etc/apt/sources.list.d/nodesource.list

    apt-get update
    apt-get install -y nodejs

    echo "Node.js installed: $(node --version)"
    echo "npm installed: $(npm --version)"
}

# Install UI dependencies
install_deps() {
    local ui_dir="$SKILL_DIR/ui"

    if [ -d "$ui_dir/node_modules" ]; then
        echo "Dependencies already installed"
        return 0
    fi

    echo "Installing UI dependencies..."
    cd "$ui_dir"
    npm install

    echo "Dependencies installed"
}

# Build UI for production
build_ui() {
    local ui_dir="$SKILL_DIR/ui"

    if [ -d "$ui_dir/dist" ]; then
        echo "UI already built"
        return 0
    fi

    echo "Building UI..."
    cd "$ui_dir"
    npm run build

    echo "UI built"
}

# Configure Caddy if domain set
configure_caddy() {
    local caddy_dir="$SKILLS_DIR/caddy"
    local dashboard_domain="${DASHBOARD_DOMAIN:-}"
    local dashboard_port="${DASHBOARD_PORT:-3000}"

    if [ ! -d "$caddy_dir" ]; then
        echo "Caddy not found - dashboard will run standalone"
        return 0
    fi

    if [ -z "$dashboard_domain" ]; then
        echo "DASHBOARD_DOMAIN not set - skipping Caddy config"
        return 0
    fi

    echo "Configuring Caddy for $dashboard_domain..."

    local snippets_dir="$caddy_dir/snippets.d"
    mkdir -p "$snippets_dir"

    cat > "$snippets_dir/dashboard.caddy" << EOF
# Auto-generated by dashboard skill
$dashboard_domain {
    reverse_proxy localhost:$dashboard_port
}
EOF

    echo "Caddy config: $dashboard_domain -> localhost:$dashboard_port"
}

install_node
install_deps
build_ui
configure_caddy

echo "Dashboard setup complete"