FROM node:20-alpine AS base
WORKDIR /app

# Install dependencies
FROM base AS deps
COPY package*.json ./
RUN npm ci --omit=dev

# Build TypeScript
FROM base AS builder
COPY package*.json ./
RUN npm ci
COPY . .
RUN npm run build


# Production image
FROM base AS runner
ENV NODE_ENV=production

RUN addgroup --system --gid 1001 nodejs && \
  adduser --system --uid 1001 express

# Copy built files
COPY --from=deps /app/node_modules ./node_modules
COPY --from=builder /app/dist ./dist
COPY --from=builder /app/package.json ./

# Create required directories
RUN mkdir -p sessions uploads logs && \
  chown -R express:nodejs sessions uploads logs

USER express

EXPOSE 3001

# Healthcheck
HEALTHCHECK --interval=30s --timeout=10s --start-period=30s --retries=3 \
  CMD wget -q --spider http://localhost:3001/api/health || exit 1

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