# Stage 1: Install dependencies and build the application
# We use node:20-slim as it's a small and efficient base image
FROM node:20-slim AS builder

# Set the working directory inside the container
WORKDIR /app

# Copy package manager files for NPM
COPY package.json package-lock.json ./

# Install dependencies using NPM's clean install command
# Also install the missing peer dependency for genkit/opentelemetry
RUN npm ci && npm install @opentelemetry/exporter-jaeger

# Copy the rest of your application's source code into the container
COPY . .

# Build the Next.js application for production
# We set an environment variable to disable Jaeger during the build process
RUN OTEL_TRACES_EXPORTER=none npm run build


# Stage 2: Create the final, small production image from the build artifacts
FROM node:20-slim AS runner

WORKDIR /app

# Set the environment to production to enable Next.js optimizations
ENV NODE_ENV=production
ENV NEXT_TELEMETRY_DISABLED 1

# --- PERMISSIONS FIX ---
# Create a non-root user and group for security
RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 nextjs

# Copy the standalone output, static assets, and public folder
# And give the new 'nextjs' user ownership of them
COPY --chown=nextjs:nodejs --from=builder /app/.next/standalone ./
COPY --chown=nextjs:nodejs --from=builder /app/.next/static ./.next/static
COPY --chown=nextjs:nodejs --from=builder /app/public ./public

# Switch to the non-root user
USER nextjs
# --- END PERMISSIONS FIX ---

# Expose the port that Next.js will run on. The default is 3000.
EXPOSE 3000

# Set the port environment variable for the container
ENV PORT=3000

# The command to start the Next.js server.
# This will now run as the 'nextjs' user.
CMD ["node", "server.js"]