# DrAgnes Dockerfile — Multi-stage build for Cloud Run
# Stage 1: Build SvelteKit application
# Stage 2: Production image with minimal footprint

# ---- Build stage -------------------------------------------------------------
FROM node:20-alpine AS build

WORKDIR /app

# Copy package files first for layer caching
COPY package.json package-lock.json ./
RUN npm ci --ignore-scripts

# Copy source and build
COPY . .
RUN npm run build

# ---- Production stage --------------------------------------------------------
FROM node:20-alpine AS production

RUN addgroup -g 1001 -S dragnes && \
    adduser -S dragnes -u 1001 -G dragnes

WORKDIR /app

# Copy built output and production dependencies
COPY --from=build /app/build ./build
COPY --from=build /app/node_modules ./node_modules
COPY --from=build /app/package.json ./package.json

# Copy WASM assets
COPY --from=build /app/static/wasm ./build/client/wasm
COPY --from=build /app/static/manifest.json ./build/client/manifest.json
COPY --from=build /app/static/dragnes-icon-192.svg ./build/client/dragnes-icon-192.svg
COPY --from=build /app/static/dragnes-icon-512.svg ./build/client/dragnes-icon-512.svg
COPY --from=build /app/static/sw.js ./build/client/sw.js

# Set environment
ENV NODE_ENV=production
ENV PORT=3000
ENV HOST=0.0.0.0

EXPOSE 3000

# Health check
HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
  CMD wget -qO- http://localhost:3000/api/health || exit 1

# Run as non-root
USER dragnes

CMD ["node", "build/index.js"]