# TurboVault Production Dockerfile
# Multi-stage build for optimized image size

# Stage 1: Builder - Full environment with all gems
FROM ruby:3.3-slim AS builder

# Install build dependencies
RUN apt-get update -qq && \
    apt-get install -y --no-install-recommends \
    build-essential \
    libpq-dev \
    libyaml-dev \
    nodejs \
    npm \
    git \
    curl && \
    rm -rf /var/lib/apt/lists/*

WORKDIR /app

# Install ALL gems first (needed for asset compilation)
COPY Gemfile Gemfile.lock ./
RUN bundle install --jobs 4 --retry 3

# Copy application code
COPY . .

# Precompile assets
ENV RAILS_ENV=production \
    NODE_ENV=production \
    SECRET_KEY_BASE=dummy
RUN bundle exec rails assets:precompile

# Stage 2: Production gems only
FROM ruby:3.3-slim AS gems

# Install build dependencies (needed to install gems with native extensions)
RUN apt-get update -qq && \
    apt-get install -y --no-install-recommends \
    build-essential \
    libpq-dev \
    libyaml-dev && \
    rm -rf /var/lib/apt/lists/*

WORKDIR /app

# Install ONLY production gems
COPY Gemfile Gemfile.lock ./
RUN bundle config set --local without 'development test' && \
    bundle install --jobs 4 --retry 3

# Stage 3: Runtime - Minimal final image
FROM ruby:3.3-slim

# Install ONLY runtime dependencies (no build tools!)
RUN apt-get update -qq && \
    apt-get install -y --no-install-recommends \
    libpq5 \
    libyaml-0-2 \
    curl \
    ca-certificates && \
    rm -rf /var/lib/apt/lists/*

# Create app user
RUN groupadd -r app && useradd -r -g app app

WORKDIR /app

# Copy production gems from gems stage
COPY --from=gems /usr/local/bundle /usr/local/bundle

# Copy application code
COPY --chown=app:app . .

# Copy precompiled assets from builder
COPY --from=builder --chown=app:app /app/public /app/public

# Create necessary directories
RUN mkdir -p tmp/pids tmp/cache tmp/sockets log && \
    chown -R app:app tmp log

# Switch to app user
USER app

# Expose port
EXPOSE 3000

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=40s --retries=3 \
  CMD curl -f http://localhost:3000/up || exit 1

# Start Rails server
CMD ["bundle", "exec", "rails", "server", "-b", "0.0.0.0", "-p", "3000"]