# Stage 1: Install dependencies
FROM node:20-alpine AS deps
WORKDIR /app
COPY package.json package-lock.json* ./
RUN npm ci --prefer-offline 2>/dev/null || npm install

# Stage 2: Build the static export
FROM node:20-alpine AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .

# Build environment variables (Stripe checkout URLs)
ARG NEXT_PUBLIC_STRIPE_STARTER_URL
ARG NEXT_PUBLIC_STRIPE_PRO_URL
ENV NEXT_PUBLIC_STRIPE_STARTER_URL=$NEXT_PUBLIC_STRIPE_STARTER_URL
ENV NEXT_PUBLIC_STRIPE_PRO_URL=$NEXT_PUBLIC_STRIPE_PRO_URL

RUN npm run build

# Stage 3: Serve with nginx
FROM nginx:alpine AS runner
COPY --from=builder /app/out /usr/share/nginx/html

# Custom nginx config for SPA routing
RUN printf 'server {\n\
    listen 80;\n\
    server_name _;\n\
    root /usr/share/nginx/html;\n\
    index index.html;\n\
\n\
    location / {\n\
        try_files $uri $uri.html $uri/ /index.html;\n\
    }\n\
\n\
    # Cache static assets\n\
    location /_next/static/ {\n\
        expires 1y;\n\
        add_header Cache-Control "public, immutable";\n\
    }\n\
\n\
    # Security headers\n\
    add_header X-Frame-Options "SAMEORIGIN" always;\n\
    add_header X-Content-Type-Options "nosniff" always;\n\
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;\n\
}\n' > /etc/nginx/conf.d/default.conf

EXPOSE 80
CMD ["nginx", "-g", "daemon off;"]