# ===============================================
# Stage 1: Dependencies Installation
# ===============================================
FROM node:20-alpine AS dependencies

# Install build dependencies
RUN apk add --no-cache python3 make g++ libc6-compat

# Set working directory
WORKDIR /app

# Copy package files
COPY package*.json ./
COPY tsconfig*.json ./

# Install all dependencies (including dev for build)
RUN npm install --legacy-peer-deps

# ===============================================
# Stage 2: Build Application
# ===============================================
FROM node:20-alpine AS builder

WORKDIR /app

# Copy dependencies from previous stage
COPY --from=dependencies /app/node_modules ./node_modules

# Copy source code
COPY . .

# Build the application
RUN npm run build

# Remove dev dependencies to reduce size
RUN npm prune --production --legacy-peer-deps

# ===============================================
# Stage 3: Production Image
# ===============================================
FROM node:20-alpine AS production

# Install dumb-init for proper signal handling
RUN apk add --no-cache dumb-init

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

# Set working directory
WORKDIR /app

# Copy built application from builder
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 ./

# Copy source code needed at runtime (for CSV storage path resolution)
COPY --from=builder --chown=nestjs:nodejs /app/src ./src

# Create logs and uploads directories
RUN mkdir -p /app/logs && \
    mkdir -p /app/src/infrastructure/storage/csv-storage/rates && \
    chown -R nestjs:nodejs /app/logs /app/src

# Switch to non-root user
USER nestjs

# Expose port
EXPOSE 4000

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
  CMD node -e "require('http').get('http://localhost:4000/health', (r) => process.exit(r.statusCode === 200 ? 0 : 1))"

# Set environment variables
ENV NODE_ENV=production \
    PORT=4000

# Use dumb-init to handle signals properly
ENTRYPOINT ["dumb-init", "--"]

# Start the application
CMD ["node", "dist/main"]