# ---- Builder stage: install deps + compile ----
FROM node:22-slim AS builder

WORKDIR /build

# Install pnpm and allow postinstall scripts for native addons
RUN npm install -g pnpm \
    && pnpm config set onlyBuiltDependencies '*' --location project

# Build-time system deps (python3 for node-gyp, g++ for native addons)
RUN apt-get update -qq && apt-get install -y -qq --no-install-recommends \
    python3 make g++ \
    && rm -rf /var/lib/apt/lists/*

# Copy manifest files first for layer caching
COPY services/backend/package.json ./
COPY patches/ ./patches/

# Install all deps (devDeps included for build)
RUN --mount=type=cache,id=pnpm-store,target=/root/.local/share/pnpm/store \
    pnpm install --no-frozen-lockfile

# Copy source (shared code embedded in src/shared/)
COPY services/backend/ ./

# Build TypeScript
RUN pnpm run build

# Strip devDependencies — production runtime only
RUN pnpm prune --prod

# ---- Runtime stage: minimal ----
FROM node:22-slim

WORKDIR /app

# Create non-root user
RUN groupadd --system app && useradd --system -g app app

# Only production artifacts from builder
COPY --from=builder /build/dist ./dist
COPY --from=builder /build/node_modules ./node_modules
COPY --from=builder /build/package.json ./

RUN chown -R app:app /app
USER app

EXPOSE 3000

HEALTHCHECK --interval=30s --timeout=10s --start-period=15s --retries=3 \
  CMD wget -qO- http://localhost:3000/api/health || exit 1

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