# Production Dockerfile for Backend
# Multi-stage build for optimization

# Stage 1: Dependencies
FROM node:20-alpine AS deps
RUN apk add --no-cache libc6-compat
WORKDIR /app

COPY package*.json ./
RUN npm ci --only=production

# Stage 2: Builder
FROM node:20-alpine AS builder
WORKDIR /app

COPY package*.json ./
COPY tsconfig.json ./
RUN npm ci

COPY src ./src
RUN npm run build

# Stage 3: Production
FROM node:20-alpine AS runner
WORKDIR /app

ENV NODE_ENV=production

# Create non-root user
RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 nodejs

# Copy built application
COPY --from=builder --chown=nodejs:nodejs /app/dist ./dist
COPY --from=deps --chown=nodejs:nodejs /app/node_modules ./node_modules
COPY --from=builder --chown=nodejs:nodejs /app/package.json ./package.json

# Create uploads directory
RUN mkdir -p /app/uploads && chown nodejs:nodejs /app/uploads
RUN mkdir -p /app/logs && chown nodejs:nodejs /app/logs

USER nodejs

EXPOSE 3001

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=40s --retries=3 \
  CMD node -e "require('http').get('http://localhost:3001/health', (r) => {process.exit(r.statusCode === 200 ? 0 : 1)})"

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