name: Build and Test Flask App

on:
  push:
    branches: [ main, master ]
  pull_request:
    branches: [ main, master ]

jobs:
  build:
    runs-on: ubuntu-latest
    
    steps:
    - uses: actions/checkout@v4
    
    - name: Set up Python via apt
      run: |
        apt update
        apt install -y python3 python3-pip python3-venv python3-dev python3-full
            
    - name: Create and activate virtual environment
      run: |
        python3 -m venv venv

        . venv/bin/activate
        pip install --upgrade pip

        echo "VIRTUAL_ENV=$PWD/venv" >> $GITHUB_ENV
        echo "$PWD/venv/bin" >> $GITHUB_PATH
    
    - name: Install dependencies
      run: |
        if [ -f dependencies.txt ]; then
          pip install --no-cache-dir -r dependencies.txt
        else
          echo "dependencies.txt not found, installing Flask only"
          pip install flask
        fi
        pip list

    - name: Debug build - check imports
      run: |
        export FLASK_APP=app.py
        export FLASK_ENV=development
        flask run --host 0.0.0.0 --debug &

    - name: Install release dependencies
      run: |
        pip install gunicorn
    
    - name: Release build (simulated)
      run: |
        gunicorn --check-config app:app