# Stage 1: Dependencies
FROM node:18-alpine AS deps
WORKDIR /app

# Install dependencies
COPY package.json package-lock.json ./
RUN npm ci

# Copy source code
COPY . .

# Stage 2: Builder
FROM node:18-alpine AS builder
WORKDIR /app

# Copy dependencies and source code
COPY --from=deps /app/node_modules ./node_modules
COPY . .

# Build the application
ENV NODE_ENV=production
ENV NEXT_TELEMETRY_DISABLED=1
RUN npm run build

# Stage 3: Runner
FROM node:18-alpine AS runner
WORKDIR /app

# Install runtime dependencies
RUN apk add --no-cache dumb-init

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

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

# Set environment variables
ENV NODE_ENV=production
ENV PORT=3000

# Use non-root user
USER nextjs

# Expose port
EXPOSE 3000

# Use dumb-init to handle signals properly
ENTRYPOINT ["/usr/bin/dumb-init", "--"]

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