# ---- build stage ----
FROM node:20-slim AS build
WORKDIR /app
COPY package*.json ./
RUN npm ci
COPY . .
# npm run build => ensure-data (skip, dataset present) + nest build + copy-data
RUN npm run build

# ---- runtime stage ----
FROM node:20-slim AS runtime
ENV NODE_ENV=production \
    PORT=3000 \
    CORS_ENABLED=true \
    MEDIA_BASE_URL=https://cdn.jsdelivr.net/gh/hasaneyldrm/exercises-dataset@main \
    JWT_SECRET=fitcoach-dev-secret
WORKDIR /app
COPY package*.json ./
RUN npm ci --omit=dev && npm cache clean --force
COPY --from=build /app/dist ./dist

EXPOSE 3000
# data-store 是运行时生成的 JSON 库，挂卷持久化
VOLUME ["/app/data-store"]
HEALTHCHECK --interval=30s --timeout=5s --start-period=20s --retries=3 \
  CMD node -e "fetch('http://localhost:'+process.env.PORT+'/api/exercises').then(r=>process.exit(r.ok?0:1)).catch(()=>process.exit(1))"
CMD ["node", "dist/main.js"]