# ---- Stage 1: The "Builder" ----
# We use the full (not slim) Node.js image because it includes the build tools
# (like Python, make, g++) needed to compile native dependencies.
FROM node:20-bullseye AS builder

# Install system dependencies needed for the build
RUN apt-get update && apt-get install -y --no-install-recommends git ca-certificates && \
    apt-get clean && rm -rf /var/lib/apt/lists/*

WORKDIR /app

# Enable pnpm
RUN corepack enable

# Copy dependency files
COPY package.json pnpm-lock.yaml* ./

# Install ALL dependencies and run build scripts.
# The --unsafe-perm flag is often needed in Docker to allow build scripts to run correctly.
RUN pnpm install --unsafe-perm

# Copy the rest of your source code
COPY . .

# Run the build script ("tsc") to compile your TypeScript into JavaScript
RUN pnpm build

# Remove development dependencies to create a clean, production-only node_modules folder
RUN pnpm prune --prod


# ---- Stage 2: The Final "Production" Image ----
# We start from a slim image to keep the final size small.
FROM node:20-bullseye-slim

# Install ONLY the necessary RUNTIME system dependencies.
# - ffmpeg: For processing audio/video sent to the bot.
# - libvips-dev: Required by the 'sharp' package for image manipulation.
RUN apt-get update && apt-get install -y --no-install-recommends ffmpeg libvips-dev && \
    apt-get clean && rm -rf /var/lib/apt/lists/*

WORKDIR /app

# Enable pnpm
RUN corepack enable

# Create the directory for session data AS THE ROOT USER
RUN mkdir ./sessions

# Change ownership of the entire app directory to the 'node' user.
# This must be done BEFORE switching to the node user.
RUN chown -R node:node /app

# NOW, switch to the built-in, non-root 'node' user for security
USER node

# Copy over the essential files from the builder stage
# These files will now be correctly owned by 'node' because of the chown command above.
COPY --from=builder /app/package.json ./package.json
COPY --from=builder /app/pnpm-lock.yaml* ./
COPY --from=builder /app/node_modules ./node_modules
COPY --from=builder /app/dist ./dist

# Set the command to run your application using the "start" script.
CMD [ "pnpm", "start" ]