FROM node:20-alpine

# Set working directory
WORKDIR /app

# Install dependencies (including dev dependencies for build)
COPY package.json package-lock.json ./
RUN npm ci

# Copy source code and configuration files
COPY src/ ./src/
COPY public/ ./public/
COPY next.config.ts ./
COPY tsconfig.json ./
COPY postcss.config.mjs ./
COPY eslint.config.mjs ./

# NEXT_PUBLIC_* values are inlined by `next build`, so they must be set before it runs
ARG NEXT_PUBLIC_API_URL=http://localhost:8000
ARG NEXT_PUBLIC_RAG_API_URL=http://localhost:8001
ENV NEXT_PUBLIC_API_URL=$NEXT_PUBLIC_API_URL
ENV NEXT_PUBLIC_RAG_API_URL=$NEXT_PUBLIC_RAG_API_URL

# Build the application
RUN npm run build

# Expose port
EXPOSE 3000

# Health check (node:20-alpine ships busybox wget, not curl)
HEALTHCHECK --interval=30s --timeout=10s --start-period=60s --retries=3 \
    CMD wget -qO- http://localhost:3000 >/dev/null 2>&1 || exit 1

# Start the application
CMD ["npm", "start"]