# Use Node.js 20 Alpine for smaller image size
FROM node:20-alpine AS base

# Install dependencies only when needed
FROM base AS deps
# Check https://github.com/nodejs/docker-node/tree/b4117f9333da4138b03a546ec926ef50a31506c3#nodealpine to understand why libc6-compat might be needed.
RUN apk add --no-cache libc6-compat
WORKDIR /app

# Install dependencies based on the preferred package manager
COPY package.json package-lock.json* ./
RUN npm ci

# Rebuild the source code only when needed
FROM base AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .

# Accept build arguments for environment variables
ARG DATABASE_URL
ARG CLOUDINARY_URL
ARG MAGIC_LINK_TOKEN

# Set environment variables for build
ENV DATABASE_URL=$DATABASE_URL
ENV CLOUDINARY_URL=$CLOUDINARY_URL
ENV MAGIC_LINK_TOKEN=$MAGIC_LINK_TOKEN

# Generate Prisma client
RUN npx prisma generate

# Build the application
RUN npm run build

# Production image, copy all the files and run the app
FROM base AS runner
WORKDIR /app

# Accept build arguments for environment variables
ARG DATABASE_URL
ARG CLOUDINARY_URL
ARG MAGIC_LINK_TOKEN

ENV NODE_ENV=production
ENV PORT=3000
ENV DATABASE_URL=$DATABASE_URL
ENV CLOUDINARY_URL=$CLOUDINARY_URL
ENV MAGIC_LINK_TOKEN=$MAGIC_LINK_TOKEN

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

# Copy the built application
COPY --from=builder --chown=sveltekit:nodejs /app/build ./build
COPY --from=builder --chown=sveltekit:nodejs /app/server.mjs ./server.mjs
COPY --from=builder --chown=sveltekit:nodejs /app/package.json ./package.json
COPY --from=builder --chown=sveltekit:nodejs /app/package-lock.json ./package-lock.json
COPY --from=builder --chown=sveltekit:nodejs /app/prisma ./prisma
COPY --from=builder --chown=sveltekit:nodejs /app/node_modules/.prisma ./node_modules/.prisma
COPY --from=builder --chown=sveltekit:nodejs /app/docker-entrypoint.sh ./docker-entrypoint.sh

# Keep "type": "module" for ES modules

# Install only production dependencies
RUN npm ci --omit=dev && npm cache clean --force

# Create directory for SQLite database
RUN mkdir -p /app/data && chown sveltekit:nodejs /app/data

# Set the database URL to use the volume
ENV DATABASE_URL="file:/app/data/database.db"

# Make entrypoint script executable
RUN chmod +x /app/docker-entrypoint.sh

USER sveltekit

EXPOSE 3000

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

ENTRYPOINT ["/app/docker-entrypoint.sh"]
CMD ["node", "server.mjs"]