# syntax=docker/dockerfile:1.20

ARG PY_IMAGE=python:3.12-slim

# Stage 1: Base Builder
FROM ${PY_IMAGE} AS base-builder

RUN apt-get update && \
    apt-get install -y --no-install-recommends \
    curl git \
    && rm -rf /var/lib/apt/lists/*

COPY --from=ghcr.io/astral-sh/uv:latest /uv /uvx /bin/

WORKDIR /app

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    UV_COMPILE_BYTECODE=1 \
    UV_LINK_MODE=copy \
    UV_PROJECT_ENVIRONMENT=/opt/venv

COPY pyproject.toml uv.lock ./

# Stage 2: Backend Builder
FROM base-builder AS backend-builder

COPY ./src ./src

RUN uv sync --frozen --no-dev --no-cache --group backend

# Stage 3: ML Builder
FROM base-builder AS ml-builder

COPY ./src ./src

RUN uv sync --frozen --no-dev --no-cache --group ml

RUN uv add prometheus-fastapi-instrumentator


# Stage 4: Backend Runtime
FROM ${PY_IMAGE} AS runtime

RUN apt-get update && \
    apt-get install -y --no-install-recommends \
    curl \
    && rm -rf /var/lib/apt/lists/*

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PATH="/opt/venv/bin:$PATH" \
    PYTHONPATH="/app:$PYTHONPATH"

WORKDIR /app

COPY --from=backend-builder /opt/venv /opt/venv

COPY ./src/ ./

EXPOSE 8080

CMD [ "/opt/venv/bin/web_api_cli", "/app/config.toml" ]


# Stage 5: ML Runtime
FROM ${PY_IMAGE} AS ml

RUN apt-get update && \
    apt-get install -y --no-install-recommends \
    curl \
    && rm -rf /var/lib/apt/lists/*

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PATH="/opt/venv/bin:$PATH" \
    PYTHONPATH="/app:$PYTHONPATH"

WORKDIR /app

COPY --from=ml-builder /opt/venv /opt/venv

COPY ./src/ ./

EXPOSE 8081

CMD [ "/opt/venv/bin/ml_api_cli", "/app/config.toml" ]


# Stage 6: Testing
FROM base-builder AS tests

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PATH="/opt/venv/bin:$PATH" \
    PYTHONPATH="/app:$PYTHONPATH"

WORKDIR /app

COPY ./src ./src

COPY ./tests ./tests

RUN uv sync --group backend --group tests --frozen --no-cache --no-dev

RUN mkdir -p /app/cov && mkdir /app/cov/html

CMD [ "sh", "-c", "coverage run --source=src -m pytest -v && coverage report > /app/cov/coverage.txt && coverage xml -o /app/cov/coverage.xml && coverage html -d /app/cov/html" ]


# Stage 7: Migrations
FROM base-builder AS migrations

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PATH="/opt/venv/bin:$PATH" \
    PYTHONPATH="/app:$PYTHONPATH"

WORKDIR /app

RUN mkdir -p ./src/template_project

COPY ./src ./src

COPY ./tests ./tests

COPY ./alembic.ini ./

RUN uv sync --group backend --group migrations --frozen --no-cache --no-dev

CMD [ "alembic", "upgrade", "head" ]