# ── Build stage ──────────────────────────────────────────────────
FROM node:20-slim AS builder

WORKDIR /app

COPY package.json package-lock.json* ./
RUN npm ci

COPY tsconfig.json ./
COPY src/ ./src/

RUN npx tsc

# ── Run stage ────────────────────────────────────────────────────
FROM node:20-slim

WORKDIR /app

# Only production deps
COPY package.json package-lock.json* ./
RUN npm ci --omit=dev && npm cache clean --force

# Compiled JS from build stage
COPY --from=builder /app/dist ./dist

# Config directory (mount domains.txt here)
RUN mkdir -p /etc/email-worker /var/log/email-worker

EXPOSE 8000 8080

HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
  CMD node -e "fetch('http://localhost:8080').then(r => r.ok ? process.exit(0) : process.exit(1)).catch(() => process.exit(1))"

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