# Frontend Dockerfile - React with multi-stage build

# Stage 1: Build
FROM node:20-alpine AS builder

WORKDIR /app

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

# Install dependencies
RUN yarn install --frozen-lockfile

# Copy source code
COPY . .

# Build arguments for environment variables
ARG REACT_APP_BACKEND_URL
ENV REACT_APP_BACKEND_URL=$REACT_APP_BACKEND_URL

# Build the application
RUN yarn build

# Stage 2: Production with Nginx
FROM nginx:alpine AS production

# Copy custom nginx config
COPY nginx.conf /etc/nginx/conf.d/default.conf

# Copy built assets from builder stage
COPY --from=builder /app/build /usr/share/nginx/html

# Create non-root user for security
RUN adduser -D -g '' appuser && \
    chown -R appuser:appuser /usr/share/nginx/html && \
    chown -R appuser:appuser /var/cache/nginx && \
    chown -R appuser:appuser /var/log/nginx && \
    touch /var/run/nginx.pid && \
    chown -R appuser:appuser /var/run/nginx.pid

# Expose port
EXPOSE 80

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD wget --no-verbose --tries=1 --spider http://localhost:80/ || exit 1

# Start nginx
CMD ["nginx", "-g", "daemon off;"]