# 1. Base Image: Use a stable, slim Python image
FROM python:3.10-slim

# Set the environment variable for Python 
ENV PYTHONUNBUFFERED=1

# 2. System Dependencies: Install essential libraries for image processing and OCR
RUN apt-get update && \
    apt-get install -y --no-install-recommends \
    libgl1 \
    libgomp1 \
    libsm6 libxext6 libxrender1 \
    tesseract-ocr \
    build-essential \
    && apt-get clean && rm -rf /var/lib/apt/lists/*

# 3. Application Setup
WORKDIR /app

# 4. Copy dependency file and install Python dependencies
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# 5. Copy ALL project files (This is where the .pkl and .h5 files arrive)
# This step MUST be done before applying permissions to model files.
COPY . .

# 6. Final Permissions and Directory Fixes (Executed AFTER COPY)
# -----------------------------------------------------------------

# Grant general access to /app so the non-root user can read/write
RUN chmod -R 777 /app

# Set up EASYOCR CACHE with permissions (Resolves PermissionError)
ENV EASYOCR_MODULE_PATH /app/easyocr_models
RUN mkdir -p /app/easyocr_models
RUN chmod -R 777 /app/easyocr_models

# CRITICAL FIX: Ensure individual model files are explicitly readable by the Gunicorn worker.
# This prevents the "Model files missing" error during Gunicorn startup.
RUN chmod 666 /app/cnn_model.h5
RUN chmod 666 /app/model.pkl
RUN chmod 666 /app/target_encoder.pkl
RUN chmod 666 /app/model_features.pkl

# Ensure the 'uploads' directory is writable for runtime file saving
RUN mkdir -p /app/uploads
RUN chmod -R 777 /app/uploads

# 7. Deployment Configuration
ENV PORT=7860
EXPOSE 7860

# 8. Start app using Gunicorn
CMD exec gunicorn --bind 0.0.0.0:$PORT --workers 1 --threads 8 app:app