# ---------- 1) Build frontend (React + Vite) ----------
FROM node:20-alpine AS frontend-build
WORKDIR /frontend

# Accept build arguments for Vite environment variables
# Hugging Face Spaces should pass these as build args, but we'll also check environment
ARG VITE_FIREBASE_API_KEY
ARG VITE_FIREBASE_AUTH_DOMAIN
ARG VITE_FIREBASE_PROJECT_ID
ARG VITE_FIREBASE_STORAGE_BUCKET
ARG VITE_FIREBASE_MESSAGING_SENDER_ID
ARG VITE_FIREBASE_APP_ID
ARG VITE_API_BASE_URL

# Export as environment variables so the build script can access them
# Use ARG value if provided, otherwise it will be empty and script will check env
ENV VITE_FIREBASE_API_KEY=$VITE_FIREBASE_API_KEY
ENV VITE_FIREBASE_AUTH_DOMAIN=$VITE_FIREBASE_AUTH_DOMAIN
ENV VITE_FIREBASE_PROJECT_ID=$VITE_FIREBASE_PROJECT_ID
ENV VITE_FIREBASE_STORAGE_BUCKET=$VITE_FIREBASE_STORAGE_BUCKET
ENV VITE_FIREBASE_MESSAGING_SENDER_ID=$VITE_FIREBASE_MESSAGING_SENDER_ID
ENV VITE_FIREBASE_APP_ID=$VITE_FIREBASE_APP_ID
ENV VITE_API_BASE_URL=$VITE_API_BASE_URL

# Install frontend dependencies
COPY frontend/package*.json ./
RUN npm install

# Copy rest of frontend (including build script)
COPY frontend/ .

# Make build script executable and run it to create .env file
# Hugging Face Spaces makes environment variables available during build
RUN chmod +x build-env.sh && \
    ./build-env.sh && \
    npm run build
# Vite will output to /frontend/dist by default

# ---------- 2) Backend (FastAPI + Python) ----------
FROM python:3.11-slim

ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

WORKDIR /app

# System deps (optional but useful for some libs)
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    && rm -rf /var/lib/apt/lists/*

# Install backend dependencies
COPY backend/requirements.txt ./backend/requirements.txt
RUN pip install --no-cache-dir -r backend/requirements.txt

# Copy backend code
COPY backend ./backend

# Copy built frontend into backend/frontend_dist
# FastAPI will serve from this folder later
RUN mkdir -p backend/frontend_dist
COPY --from=frontend-build /frontend/dist ./backend/frontend_dist

# Create data directory for SQLite
RUN mkdir -p data

# Env vars used in backend/db.py etc.
ENV DB_PATH=/app/data/app.db
ENV PORT=7860
ENV PYTHONPATH=/app

EXPOSE 7860

# Launch FastAPI app (we'll use backend.app.main:app)
CMD ["uvicorn", "backend.app.main:app", "--host", "0.0.0.0", "--port", "7860"]