# Use Node.js 20 Alpine for smaller image size
FROM node:20-alpine AS base

# Install dependencies only when needed
FROM base AS deps
RUN apk add --no-cache libc6-compat
WORKDIR /app

# Copy package files
COPY package.json yarn.lock* ./
RUN yarn install

# Rebuild the source code only when needed
FROM base AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .

# Build Next.js app
ENV NEXT_TELEMETRY_DISABLED 1
# Create public directory if it doesn't exist (Next.js may need it)
RUN mkdir -p public
RUN yarn build

# Production image, copy all the files and run next
FROM base AS runner
WORKDIR /app

ENV NODE_ENV production
ENV NEXT_TELEMETRY_DISABLED 1

RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 nextjs

# Copy necessary files from standalone build
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

USER nextjs

# Expose port 7860 (Hugging Face Spaces default)
EXPOSE 7860

ENV PORT 7860
ENV HOSTNAME "0.0.0.0"

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