# =============================================================================
# Builder Stage
# =============================================================================
FROM node:18-alpine AS builder

WORKDIR /app

# Copiar archivos de dependencias
COPY package*.json ./
COPY tsconfig.json ./

# Instalar dependencias
RUN npm ci --only=production

# Copiar código fuente
COPY src/ ./src/

# Compilar TypeScript
RUN npm run compile

# =============================================================================
# Production Stage
# =============================================================================
FROM node:18-alpine

WORKDIR /app

# Copiar node_modules y código compilado
COPY --from=builder /app/node_modules ./node_modules
COPY --from=builder /app/out ./out
COPY --from=builder /app/package.json ./

# Crear usuario no-root
RUN addgroup -g 1001 -S nodejs && \
    adduser -S nodejs -u 1001

USER nodejs

EXPOSE 3000

# Health check
HEALTHCHECK --interval=30s --timeout=5s --start-period=30s --retries=3 \
  CMD node -e "require('http').get('http://localhost:3000/health', (r) => {process.exit(r.statusCode === 200 ? 0 : 1)})"

CMD ["node", "out/server.js"]
