# Stage 1: Install dependencies
FROM node:20-alpine AS deps
WORKDIR /app

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

# Install dependencies
RUN npm ci --only=production && \
    npm cache clean --force

# Stage 2: Build the application
FROM node:20-alpine AS builder
WORKDIR /app

# Disable Next.js telemetry during build
ENV NEXT_TELEMETRY_DISABLED=1

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

# Install all dependencies (including devDependencies)
RUN npm ci

# Copy source code
COPY . .

# Build Next.js application
RUN npm run build

# Stage 3: Production runtime
FROM node:20-alpine AS runner
WORKDIR /app

# Set environment to production
ENV NODE_ENV=production
# Disable Next.js telemetry
ENV NEXT_TELEMETRY_DISABLED=1

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

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

# Set correct permissions
RUN chown -R nextjs:nodejs /app

# Switch to non-root user
USER nextjs

# Expose port
EXPOSE 3000

# Set environment variable for port
ENV PORT=3000
ENV HOSTNAME="0.0.0.0"

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