# --- Frontend Build ---
FROM node:20-alpine as frontend-builder
WORKDIR /app/frontend
COPY frontend/package*.json ./
RUN npm install --force
COPY frontend/ ./
RUN npm run build

# --- Backend Build ---
FROM rust:1.95-slim as backend-builder
WORKDIR /app/backend
# Pre-build dependencies for caching
COPY backend/Cargo.toml backend/Cargo.lock ./
RUN mkdir src && echo "fn main() {}" > src/main.rs && cargo build --release && rm -rf src
COPY backend/src ./src
COPY backend/migrations ./migrations
# Ensure we actually rebuild the binary with the real source
RUN touch src/main.rs && cargo build --release

# --- Final Image ---
FROM debian:bookworm-slim
RUN apt-get update && apt-get install -y sqlite3 ca-certificates && rm -rf /var/lib/apt/lists/*
WORKDIR /app
COPY --from=backend-builder /app/backend/target/release/attendance ./server
COPY --from=frontend-builder /app/frontend/build ./frontend/build

ENV STATIC_DIR=/app/frontend/build
ENV DATABASE_URL=sqlite:/data/attendance.db
ENV JWT_SECRET=change-me-at-runtime
EXPOSE 3000
CMD ["./server"]