# Multi-stage build for Node.js frontend application
FROM node:iron-alpine3.22 AS builder

# Enable Corepack for Yarn 4.x
RUN corepack enable

# Set working directory
WORKDIR /app

# Copy Yarn configuration and package files
COPY .yarnrc.yml package.json yarn.lock ./

# Install dependencies (uses PnP by default from .yarnrc.yml)
RUN yarn install --immutable

# Copy source code
COPY . .

# Build the application
RUN yarn build

# Production stage
FROM node:iron-alpine3.22 AS production

# Enable Corepack for Yarn 4.x
RUN corepack enable

# Create app user
RUN addgroup -g 1001 -S nodejs && \
  adduser -S nextjs -u 1001

# Set working directory
WORKDIR /app

# Copy Yarn configuration and package files
COPY .yarnrc.yml package.json yarn.lock ./

# Install production dependencies (uses PnP)
RUN yarn install --immutable --production

# Copy PnP files and built application from builder stage
COPY --from=builder --chown=nextjs:nodejs /app/.pnp.cjs /app/.pnp.loader.mjs ./
COPY --from=builder --chown=nextjs:nodejs /app/.yarn ./.yarn
COPY --from=builder --chown=nextjs:nodejs /app/dist ./dist

# Switch to non-root user
USER nextjs

# Expose the application port
EXPOSE 3000

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
  CMD node -e "require('http').get('http://localhost:3000/health', (res) => { process.exit(res.statusCode === 200 ? 0 : 1) }).on('error', () => process.exit(1))"

# Command to run the application
CMD ["yarn", "start"]
