"""
Configuration settings for ScholarPress application.
"""

import os
from datetime import timedelta

basedir = os.path.abspath(os.path.dirname(__file__))


class Config:
    """Base configuration class."""
    
    # Secret key for session management
    SECRET_KEY = os.environ.get('SECRET_KEY') or 'scholarpress-secret-key-change-in-production'
    
    # Database configuration
    SQLALCHEMY_DATABASE_URI = os.environ.get('DATABASE_URL') or \
        'mysql+pymysql://tezloans_scholarpress:Test%PASS123@148.113.4.193/tezloans_scholarpress'
    SQLALCHEMY_TRACK_MODIFICATIONS = False
    
    # File upload configuration
    UPLOAD_FOLDER = os.path.join(basedir, 'uploads')
    MAX_CONTENT_LENGTH = 16 * 1024 * 1024  # 16MB max file size
    ALLOWED_EXTENSIONS = {'pdf', 'docx', 'txt', 'doc'}
    ALLOWED_IMAGE_EXTENSIONS = {'png', 'jpg', 'jpeg', 'gif', 'webp'}
    
    # Mail configuration
    MAIL_SERVER = os.environ.get('MAIL_SERVER') or 'smtp.gmail.com'
    MAIL_PORT = int(os.environ.get('MAIL_PORT') or 587)
    MAIL_USE_TLS = os.environ.get('MAIL_USE_TLS', 'true').lower() in ['true', 'on', '1']
    MAIL_USERNAME = os.environ.get('MAIL_USERNAME')
    MAIL_PASSWORD = os.environ.get('MAIL_PASSWORD')
    MAIL_DEFAULT_SENDER = os.environ.get('MAIL_DEFAULT_SENDER') or 'noreply@scholarpress.org'
    
    # Session configuration
    PERMANENT_SESSION_LIFETIME = timedelta(days=7)
    
    # CSRF configuration
    WTF_CSRF_TIME_LIMIT = None  # No expiration - token valid for the entire session
    
    # Pagination
    ARTICLES_PER_PAGE = 10
    SUBMISSIONS_PER_PAGE = 15
    
    # Site URL for email links
    SITE_URL = os.environ.get('SITE_URL') or 'https://scholarpress.efficosoftwares.com'


class DevelopmentConfig(Config):
    """Development configuration."""
    DEBUG = True
    

class ProductionConfig(Config):
    """Production configuration."""
    DEBUG = False
    
    
class TestingConfig(Config):
    """Testing configuration."""
    TESTING = True
    SQLALCHEMY_DATABASE_URI = 'sqlite:///:memory:'