setup_env_run.sh

#!/bin/bash

# Check Python version and existence
check_python(){
    if ! [[ -x "$(command -v python3)" ]]; then
        echo "Error: 
            Python 3 is required for Cinematica API.
            Please install the latest version of Python 3 from: https://www.python.org/downloads/installing-python/" >&2
        exit 1
    fi
}

# Creates virtual environment
create_virtual_venv(){
    if [ -d "src/$1" ]; then
        echo "A virtual environment named $1 already exists in the src directory!"
        echo "Skipping virtual environment creation."
    else
        python3 -m venv src/$1
        echo "Virtual environment $1 created in the src directory!"
    fi
}

# Activates virtual environment
activate_virtual_venv(){
    source src/$1/bin/activate
}

# Upgrades to the latest version of pip
upgrade_pip(){
    pip install --upgrade pip
}

# Install requirements and dependencies
install_requirements(){
    pip install -r $1  
}

# Create .env file with required environment variables
create_env_file(){
    cat <<EOT >> .env
DATABASE_URL="postgresql+psycopg2://cinematica_dbuser:cinematica888@localhost:5432/cinematica_db"
SECRET_KEY="the_most_secret_key"
EOT
}

# Resets the database before running the API
reset_database(){
    flask db drop
    flask db create
    flask db seed
    echo "Database reset complete!"
}

# Main execution of bash script
echo "Welcome! Let's get you set up for Cinematica API!"

sleep 2
clear

check_python

create_virtual_venv .venv

activate_virtual_venv .venv
echo "Virtual environment created and activated in the src directory!"

# Change to the src directory
cd src

sleep 2

upgrade_pip
clear

install_requirements requirements.txt

create_env_file

echo "Requirements and dependencies installed. .env file created in src directory!"

sleep 2
clear

reset_database

sleep 2
clear

echo "Setup complete! Virtual environment initialised, dependencies installed. Starting the Cinematica API now..."

flask run