# =============================================================================
# GoHorse Backoffice - Ultra-Optimized Dockerfile with pnpm
# Target: < 200MB final image
# =============================================================================

# Stage 1: Base with pnpm
FROM node:20-alpine AS base
RUN corepack enable && corepack prepare pnpm@9.15.4 --activate
RUN apk add --no-cache libc6-compat

# Stage 2: Fetch dependencies (better cache utilization)
FROM base AS deps
WORKDIR /app
COPY pnpm-lock.yaml ./
RUN pnpm fetch

# Stage 3: Build
FROM base AS builder
WORKDIR /app

# Copy lockfile and fetch cache
COPY pnpm-lock.yaml ./
COPY --from=deps /app/node_modules ./node_modules

# Copy package files and install
COPY package.json ./
RUN pnpm install --frozen-lockfile --offline

# Copy source and build
COPY . .
RUN pnpm build

# Prune dev dependencies
RUN pnpm prune --prod && \
  pnpm store prune && \
  rm -rf /root/.local/share/pnpm/store

# =============================================================================
# Stage 4: Production - Minimal runtime (Distroless alternative: Alpine)
# =============================================================================
FROM node:20-alpine AS production

# Security: non-root user
RUN addgroup -g 1001 -S nodejs && \
  adduser -S nestjs -u 1001 -G nodejs

WORKDIR /app

# Copy only production artifacts
COPY --from=builder --chown=nestjs:nodejs /app/dist ./dist
COPY --from=builder --chown=nestjs:nodejs /app/node_modules ./node_modules
COPY --from=builder --chown=nestjs:nodejs /app/package.json ./

# Remove unnecessary files to reduce size
RUN find node_modules -name "*.md" -delete 2>/dev/null || true && \
  find node_modules -name "*.d.ts" -delete 2>/dev/null || true && \
  find node_modules -name "CHANGELOG*" -delete 2>/dev/null || true && \
  find node_modules -name "LICENSE*" -delete 2>/dev/null || true && \
  find node_modules -name "*.map" -delete 2>/dev/null || true && \
  find node_modules -type d -name "test" -exec rm -rf {} + 2>/dev/null || true && \
  find node_modules -type d -name "tests" -exec rm -rf {} + 2>/dev/null || true && \
  find node_modules -type d -name "__tests__" -exec rm -rf {} + 2>/dev/null || true && \
  find node_modules -type d -name "docs" -exec rm -rf {} + 2>/dev/null || true && \
  rm -rf /tmp/* /var/cache/apk/*

# Environment
ENV NODE_ENV=production
ENV PORT=3001
ENV HOST=0.0.0.0

# Switch to non-root user
USER nestjs

EXPOSE 3001

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=10s --retries=3 \
  CMD node -e "const http = require('http'); http.get('http://localhost:3001/health', (r) => process.exit(r.statusCode === 200 ? 0 : 1)).on('error', () => process.exit(1))"

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