# syntax=docker/dockerfile:1

# ── Stage 1: deps ─────────────────────────────────────────────────────────────
FROM oven/bun:1 AS deps
WORKDIR /app

COPY frontend/package.json frontend/bun.lock* ./
RUN bun install --frozen-lockfile

# ── Stage 2: builder ──────────────────────────────────────────────────────────
FROM oven/bun:1 AS builder
WORKDIR /app

COPY --from=deps /app/node_modules ./node_modules
COPY frontend/ .

ENV NEXT_TELEMETRY_DISABLED=1
RUN bun run build

# ── Stage 3: runner ───────────────────────────────────────────────────────────
FROM oven/bun:1-slim AS runner
WORKDIR /app

ENV NODE_ENV=production
ENV NEXT_TELEMETRY_DISABLED=1

# Suppress debconf warnings in Docker
ENV DEBIAN_FRONTEND=noninteractive

# Dedicated non-root user
RUN apt-get update && \
    apt-get install -y --no-install-recommends adduser && \
    rm -rf /var/lib/apt/lists/* && \
    addgroup --system --gid 1001 nodejs && \
    adduser --system --uid 1001 nextjs

# Create writable data directory with proper permissions
RUN mkdir -p /app/data/uploads && \
    chown -R nextjs:nodejs /app/data && \
    chmod 750 /app/data && \
    chmod 700 /app/data/uploads

# Copy only production artifacts from builder (no source code, no node_modules)
COPY --from=builder /app/public           ./public
COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
COPY --from=builder --chown=nextjs:nodejs /app/.next/static     ./.next/static

# Secure filesystem permissions
RUN chmod 755 /app && \
    chmod 755 /app/.next && \
    chmod 755 /app/public

# Switch to non-root user
USER nextjs

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
  CMD bun --eval "import('http').then(h => h.request('http://localhost:3000/', res => process.exit(res.statusCode === 200 ? 0 : 1)).end())" || exit 1

EXPOSE 3000

ENV PORT=3000
ENV HOSTNAME=0.0.0.0

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