# ==================== BUILD STAGE ====================
FROM node:20-alpine AS builder
WORKDIR /app

# Install chromium dependencies for whatsapp-web.js
RUN apk add --no-cache \
    chromium \
    nss \
    freetype \
    harfbuzz \
    ca-certificates \
    ttf-freefont \
    git

# Copy package files
COPY package*.json ./

# Install dependencies
RUN npm ci --production=false

# Copy patches directory if it exists
COPY patches ./patches

# Run postinstall (patch-package)
RUN npm run postinstall || true

# Copy application files
COPY server.js ./

# ==================== RUNTIME STAGE ====================
FROM node:20-alpine
WORKDIR /app

# Install chromium and runtime dependencies
RUN apk add --no-cache \
    chromium \
    nss \
    freetype \
    harfbuzz \
    ca-certificates \
    ttf-freefont

# Tell Puppeteer to use installed chromium
ENV PUPPETEER_SKIP_CHROMIUM_DOWNLOAD=true \
    PUPPETEER_EXECUTABLE_PATH=/usr/bin/chromium-browser

# Create non-root user
RUN addgroup -g 1000 whatsapp && \
    adduser -D -u 1000 -G whatsapp whatsapp

# Copy dependencies from builder
COPY --from=builder --chown=whatsapp:whatsapp /app/node_modules ./node_modules

# Copy application files
COPY --chown=whatsapp:whatsapp server.js ./
COPY --chown=whatsapp:whatsapp package*.json ./

# Create volume directories
RUN mkdir -p /app/data /app/media /app/.wwebjs_cache /app/.wwebjs_auth && \
    chown -R whatsapp:whatsapp /app

USER whatsapp

EXPOSE 3001

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
    CMD node -e "require('http').get('http://localhost:3001/health', (r) => { process.exit(r.statusCode === 200 ? 0 : 1); }).on('error', () => process.exit(1));"

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