# Build stage
FROM node:20-alpine AS builder

WORKDIR /app

# Install dependencies
COPY package*.json ./
RUN npm ci

# Copy application source
COPY . .

# Set build-time environment variable for API URL
ARG PUBLIC_API_URL=http://localhost:8000
ENV PUBLIC_API_URL=${PUBLIC_API_URL}

# Build the application
RUN npm run build

# Production stage
FROM node:20-alpine

WORKDIR /app

# Create non-root user
RUN addgroup -g 1001 -S nodejs && adduser -S sveltekit -u 1001

# Copy built application
COPY --from=builder --chown=sveltekit:nodejs /app/build ./build
COPY --from=builder --chown=sveltekit:nodejs /app/package*.json ./
COPY --from=builder --chown=sveltekit:nodejs /app/node_modules ./node_modules

# Switch to non-root user
USER sveltekit

# Expose port
EXPOSE 3000

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD wget --no-verbose --tries=1 --spider http://localhost:3000/ || exit 1

# Run production server
ENV NODE_ENV=production
ENV PORT=3000
CMD ["node", "build"]