# Containerfile for MOTM (Man of the Match) Application
# Flask-based voting system for hockey matches

# Stage 1: Build stage
FROM python:3.11-slim as builder

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PIP_NO_CACHE_DIR=1 \
    PIP_DISABLE_PIP_VERSION_CHECK=1

# Install system dependencies for building Python packages
RUN apt-get update && apt-get install -y \
    build-essential \
    libpq-dev \
    default-libmysqlclient-dev \
    pkg-config \
    && rm -rf /var/lib/apt/lists/*

# Create and activate virtual environment
RUN python -m venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"

# Copy requirements and install Python dependencies
COPY requirements.txt ./
RUN pip install --upgrade pip && \
    pip install -r requirements.txt

# Stage 2: Runtime stage
FROM python:3.11-slim

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PATH="/opt/venv/bin:$PATH" \
    DATABASE_TYPE=postgresql \
    FLASK_ENV=production \
    FLASK_APP=main.py \
    FLASK_RUN_HOST=0.0.0.0 \
    FLASK_RUN_PORT=5000

# Install runtime dependencies
RUN apt-get update && apt-get install -y \
    libpq5 \
    default-mysql-client \
    curl \
    && rm -rf /var/lib/apt/lists/*

# Copy virtual environment from builder stage
COPY --from=builder /opt/venv /opt/venv

# Create non-root user
RUN groupadd -r appuser && useradd -r -g appuser appuser

# Create application directory
WORKDIR /app

# Copy application code
COPY --chown=appuser:appuser . .

# Create directories for data and logs
RUN mkdir -p /app/data /app/logs && \
    chown -R appuser:appuser /app/data /app/logs

# Create a startup script for better initialization
RUN echo '#!/bin/bash\n\
# Wait for database to be ready\n\
echo "Waiting for database connection..."\n\
while ! python -c "import psycopg2; psycopg2.connect(host=\"$DB_HOST\", port=\"$DB_PORT\", user=\"$DB_USER\", password=\"$DB_PASSWORD\", dbname=\"$DB_NAME\")" 2>/dev/null; do\n\
  echo "Database not ready, waiting..."\n\
  sleep 2\n\
done\n\
echo "Database connection established!"\n\
\n\
# Initialize database if needed\n\
python -c "from db_setup import db_config_manager; db_config_manager.load_config(); db_config_manager._update_environment_variables()"\n\
\n\
# Start the application\n\
exec python main.py' > /app/start.sh && \
    chmod +x /app/start.sh && \
    chown appuser:appuser /app/start.sh

# Switch to non-root user
USER appuser

# Expose port
EXPOSE 5000

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:5000/ || exit 1

# Default command
CMD ["/app/start.sh"]