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

# Vite bakes VITE_* vars in at BUILD time — pass them as build args
# (see docker-compose.yml). Empty values keep the demo fallback UI.
ARG VITE_SUPABASE_URL=""
ARG VITE_SUPABASE_ANON_KEY=""
ARG VITE_API_URL=""
ENV VITE_SUPABASE_URL=$VITE_SUPABASE_URL \
    VITE_SUPABASE_ANON_KEY=$VITE_SUPABASE_ANON_KEY \
    VITE_API_URL=$VITE_API_URL

# Install dependencies first (layer caching)
COPY package.json ./
RUN npm install

# Copy source and build frontend + bundle server
COPY . .
RUN npm run build

# ---- Stage 2: Production ----
FROM node:20-alpine AS production
WORKDIR /app

# HF Spaces routes to 7860 — the server MUST default to it (see server.ts).
ENV NODE_ENV=production \
    PORT=7860

# Install production-only dependencies (esbuild, vitest, typescript etc. excluded)
COPY package.json ./
RUN npm install --omit=dev && npm cache clean --force

# Copy the built output from builder stage
COPY --from=builder /app/dist ./dist

EXPOSE 7860

HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
  CMD wget -qO- http://127.0.0.1:7860/api/health >/dev/null 2>&1 || exit 1

CMD ["node", "dist/server.cjs"]