FROM alpine:3.10 AS elm-builder

ARG ELM_VERSION=0.19.1
ARG ELM_URL=https://github.com/elm/compiler/releases/download/${ELM_VERSION}/binary-for-linux-64-bit.gz

# Download internet packages + Node & npm
RUN apk add --no-cache ca-certificates curl gzip bash nodejs npm

# Download & install Elm
RUN curl -L ${ELM_URL} \
    | gunzip > /usr/local/bin/elm \
    && chmod +x /usr/local/bin/elm

# Install uglify-js globally
RUN npm install -g uglify-js

WORKDIR /app

# Copy Elm code
COPY elm.json .
COPY elm/ elm/

# Compile module
RUN elm make --output=/app/elm.js --optimize elm/EloTracker.elm

# Optimize & Minify compiled JS
RUN uglifyjs elm.js \
        --compress "pure_funcs=[F2,F3,F4,F5,F6,F7,F8,F9,A2,A3,A4,A5,A6,A7,A8,A9],pure_getters,keep_fargs=false,unsafe_comps,unsafe" \
        | uglifyjs --mangle --output elo_tracker.js

FROM python:3.10-alpine AS python-builder
WORKDIR /app

# Install build dependencies
RUN apk add --no-cache gcc musl-dev python3-dev
COPY requirements-elo.txt .

# Create wheels for faster installation
RUN pip wheel --no-cache-dir --wheel-dir /wheels -r requirements-elo.txt

FROM python:3.10-alpine
WORKDIR /app

# Install from pre-built wheels
COPY --from=python-builder /wheels /wheels
COPY requirements-elo.txt .
RUN pip install --no-cache-dir --no-index --find-links=/wheels \
        -r requirements-elo.txt && rm -rf /wheels

# Install Elm front-end JS
COPY --from=elm-builder /app/elo_tracker.js /app/elo_tracker/static/elo_tracker.js

# Install ELO tracker code
COPY agents/ agents/
COPY elo_tracker/ elo_tracker/
COPY pyclient/ pyclient/
COPY pyserver/ pyserver/
COPY elo.py .

CMD ["python", "elo.py"]