# Build stage
FROM node:20-alpine AS builder

WORKDIR /app

# Copy package files
COPY frontend/package*.json ./

# Install dependencies
RUN npm ci

# Copy source code
COPY frontend/ .

# Build argument for API URL (Next.js uses NEXT_PUBLIC_)
ARG NEXT_PUBLIC_API_URL=http://backend:8000
ENV NEXT_PUBLIC_API_URL=${NEXT_PUBLIC_API_URL}

# Build Next.js app
RUN npm run build

# Production stage
FROM node:20-alpine

WORKDIR /app

# Copy only necessary files from builder
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 3000

# Start Next.js in production mode
CMD ["npm", "start"]