FROM python:3.9-slim-bookworm

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PIP_NO_CACHE_DIR=1 \
    STREAMLIT_BROWSER_GATHER_USAGE_STATS=false \
    MPLBACKEND=Agg \
    MPLCONFIGDIR=/tmp/mplconfig

WORKDIR /app

# Minimal system deps for matplotlib fonts/rendering (no compilers needed)
RUN apt-get update && apt-get install -y --no-install-recommends \
    curl ca-certificates fonts-dejavu libfreetype6 libpng16-16 \
 && rm -rf /var/lib/apt/lists/* \
 && mkdir -p /tmp/mplconfig

# Install Python deps
COPY requirements.txt .
RUN python -m pip install --upgrade pip setuptools wheel \
 && pip install --no-cache-dir --only-binary=:all: "TA-Lib==0.6.5" \
 && pip install --no-cache-dir -r requirements.txt

# Your code
COPY . .

ENV PORT=7860
EXPOSE 7860

# (Optional) healthcheck
HEALTHCHECK --interval=30s --timeout=5s --start-period=20s --retries=3 \
  CMD curl --fail http://127.0.0.1:${PORT}/_stcore/health || exit 1

CMD ["sh","-c","streamlit run app.py --server.port=${PORT} --server.address=0.0.0.0"]