# Stage 1: Install dependencies
FROM node:22-alpine AS deps
WORKDIR /app

# Install dependencies based on your package manager
# If you use npm:
COPY package.json package-lock.json ./
RUN npm ci

# If you use yarn:
# COPY package.json yarn.lock ./
# RUN yarn install --frozen-lockfile

# Stage 2: Build the Next.js application
FROM node:22-alpine AS builder
WORKDIR /app

# Copy dependencies from the 'deps' stage
COPY --from=deps /app/node_modules ./node_modules
COPY . .

# Build the Next.js application
# This will create the .next directory with optimized production build
RUN npm run build

# Stage 3: Run the Next.js application in production
FROM node:22-alpine AS runner
WORKDIR /app

# Set environment variables for Next.js production server
ENV NODE_ENV production

# Next.js requires specific environment variables for standalone output
# If you are using `output: 'standalone'` in next.config.js, uncomment the following:
# ENV NEXT_SHARP_PATH=/usr/local/lib/node_modules/sharp
# COPY --from=builder /app/.next/standalone ./
# COPY --from=builder /app/.next/static ./.next/static
# COPY --from=builder /app/public ./public

# If not using standalone output, copy the necessary files
COPY --from=builder /app/public ./public
COPY --from=builder /app/.next ./.next
COPY --from=builder /app/node_modules ./node_modules
COPY --from=builder /app/package.json ./package.json

# Expose the port Next.js runs on (default is 3000)
EXPOSE 3000

# Command to run the Next.js application
CMD ["npm", "start"]