# Build stage
FROM node:20-alpine AS builder

WORKDIR /app

# Copy package files
COPY package.json package-lock.json* ./

# Install dependencies
RUN npm install

# Copy source code
COPY . .

# Build arguments for environment variables
ARG NEXT_PUBLIC_API_URL
ARG NEXT_PUBLIC_OLD_ADMIN_URL
ARG NEXT_PUBLIC_SDK_URL
ARG NEXT_PUBLIC_KLAUSUR_SERVICE_URL

# Set environment variables for build
ENV NEXT_PUBLIC_API_URL=$NEXT_PUBLIC_API_URL
ENV NEXT_PUBLIC_OLD_ADMIN_URL=$NEXT_PUBLIC_OLD_ADMIN_URL
ENV NEXT_PUBLIC_SDK_URL=$NEXT_PUBLIC_SDK_URL
ENV NEXT_PUBLIC_KLAUSUR_SERVICE_URL=$NEXT_PUBLIC_KLAUSUR_SERVICE_URL

# Build the application
RUN npm run build

# Production stage
FROM node:20-alpine AS runner

WORKDIR /app

# Set to production
ENV NODE_ENV=production

# Create non-root user
RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 nextjs

# Copy built assets
COPY --from=builder /app/public ./public
COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static

# Switch to non-root user
USER nextjs

# Expose port (internal port is 3000, mapped to 3002 externally)
EXPOSE 3000

# Set hostname
ENV HOSTNAME="0.0.0.0"

# Start the application
CMD ["node", "server.js"]