FROM python:3.8-slim

# Install system dependencies
RUN apt-get update && apt-get install -y \
    ffmpeg \
    libsndfile1 \
    libsndfile1-dev \
    gcc \
    g++ \
    gfortran \
    libopenblas-dev \
    liblapack-dev \
    pkg-config \
    curl \
    && rm -rf /var/lib/apt/lists/*

# Set working directory
WORKDIR /app

# Upgrade pip, setuptools, wheel
RUN pip install --no-cache-dir --upgrade pip setuptools wheel

# Copy requirements
COPY requirements.txt .

# Install Python dependencies in stages for better caching
# Using versions compatible with Python 3.8
RUN pip install --no-cache-dir numpy==1.23.5
RUN pip install --no-cache-dir scipy==1.10.1

# Install Essentia - Python 3.8 version (latest available with pre-built wheels)
RUN ARCH=$(uname -m) && \
    if [ "$ARCH" = "x86_64" ]; then \
        echo "Installing Essentia for x86_64 Python 3.8..." && \
        pip install --no-cache-dir --trusted-host essentia.upf.edu \
            https://essentia.upf.edu/python-wheels/essentia-2.1b6.dev218-cp38-cp38-manylinux1_x86_64.whl || \
        echo "Essentia installation failed, using fallback mode"; \
    else \
        echo "Essentia wheels only available for x86_64, using fallback mode"; \
    fi

RUN pip install --no-cache-dir -r requirements.txt

# Copy application code
COPY src/ ./src/
COPY alembic.ini .
COPY models/ ./models/

# Create models directory if not exists
RUN mkdir -p /app/models

# Expose port
EXPOSE 8000

# Run migrations and start server
CMD alembic upgrade head && \
    uvicorn src.api.main:app --host 0.0.0.0 --port 8000