Dockerfile.api

# --- Stage 1: Production Dependency Builder ---
# Builds a lean virtual environment with only production dependencies.
FROM python:3.11 AS prod_builder

WORKDIR /app

# Upgrade system packages to minimize vulnerabilities
RUN apt-get update && \
    apt-get install -y --no-install-recommends build-essential && \
    apt-get dist-upgrade -y && \
    apt-get clean && \
    rm -rf /var/lib/apt/lists/*

# Copy Poetry files and install only production dependencies
COPY pyproject.toml poetry.lock ./
RUN pip install --upgrade pip setuptools wheel && \
    pip install --upgrade poetry && \
    poetry cache clear . --all || true && \
    for i in 1 2 3; do poetry install --only main --no-root && break || sleep 10; done


# --- Stage 2: Development & Test Dependency Builder ---
# Builds on the production environment, adding development dependencies.
FROM prod_builder AS dev_builder

COPY pyproject.toml poetry.lock ./
RUN pip install --upgrade pip setuptools wheel && \
    pip install --upgrade poetry && \
    poetry cache clear . --all || true && \
    for i in 1 2 3; do poetry install --with dev --no-root && break || sleep 10; done


# --- Stage 3: Tester ---
# Uses the full development environment to run the test suite as a quality gate.
# The build will fail here if any tests fail.
FROM dev_builder AS tester

WORKDIR /app

COPY src ./src
COPY tests ./tests
COPY config ./config
COPY data/dev ./data/dev
COPY pytest.ini .

RUN poetry run pytest


# --- Stage 4: Final Production Image ---
# Creates the final, lean, and secure image for the API server.
FROM python:3.11

WORKDIR /app

# Update system packages and remove build tools to minimize vulnerabilities
RUN apt-get update && \
    apt-get dist-upgrade -y && \
    apt-get install -y --no-install-recommends libpq-dev gcc && \
    apt-get clean && \
    rm -rf /var/lib/apt/lists/* && \
    apt-get purge -y --auto-remove gcc

# Copy installed dependencies from builder
COPY --from=prod_builder /usr/local /usr/local

# Copy application code
COPY src/ ./src/
COPY infrastructure/ ./infrastructure/
COPY notebooks/ ./notebooks/
COPY config/ ./config/
COPY infrastructure/app.py ./app.py

# Expose the API port
EXPOSE 8000

# Set environment variables (override in ECS/EKS/production)
ENV PYTHONUNBUFFERED=1

# Use uvicorn as the entrypoint (run FastAPI app)
CMD ["poetry", "run", "uvicorn", "src.adapters.api.main:app", "--host", "0.0.0.0", "--port", "8000"]