"""
Data models and storage functions for the Flask job application system.
"""
import os
import yaml
from pathlib import Path
from flask import current_app


def get_application_path(session_id):
    """Get the path to an application folder"""
    return os.path.join(current_app.config['APPLICATIONS_FOLDER'], session_id)


def get_data_file_path(session_id):
    """Get the path to the application data YAML file"""
    return os.path.join(get_application_path(session_id), 'data.yaml')


def get_attachments_path(session_id):
    """Get the path to the attachments folder"""
    return os.path.join(get_application_path(session_id), 'attachments')


def load_application_data(session_id):
    """Load application data from YAML file"""
    data_file = get_data_file_path(session_id)
    if os.path.exists(data_file):
        with open(data_file, 'r', encoding='utf-8') as f:
            return yaml.safe_load(f)
    return None


def save_application_data(session_id, data):
    """Save application data to YAML file"""
    app_path = get_application_path(session_id)
    Path(app_path).mkdir(parents=True, exist_ok=True)

    data_file = get_data_file_path(session_id)
    with open(data_file, 'w', encoding='utf-8') as f:
        yaml.dump(data, f, allow_unicode=True, default_flow_style=False)