import os
from dotenv import load_dotenv

basedir = os.path.abspath(os.path.dirname(__file__))
load_dotenv(os.path.join(basedir, '.env'))


class Config:
    """Base configuration."""
    
    # Flask
    SECRET_KEY = os.environ.get('SECRET_KEY') or 'dev-secret-key-change-in-production'
    
    # Database
    SQLALCHEMY_DATABASE_URI = os.environ.get('DATABASE_URL') or \
        'sqlite:///' + os.path.join(basedir, 'lego_instructions.db')
    SQLALCHEMY_TRACK_MODIFICATIONS = False
    
    # File Upload
    # basedir is E:\LIM\app, so we just need 'static/uploads' to get E:\LIM\app\static\uploads
    UPLOAD_FOLDER = os.path.join(basedir, 'static', 'uploads')
    MAX_CONTENT_LENGTH = int(os.environ.get('MAX_CONTENT_LENGTH', 52428800))  # 50MB
    ALLOWED_EXTENSIONS = {'pdf', 'png', 'jpg', 'jpeg', 'gif', 'webp'}
    
    # Brickset API
    BRICKSET_API_KEY = os.environ.get('BRICKSET_API_KEY')
    BRICKSET_USERNAME = os.environ.get('BRICKSET_USERNAME')
    BRICKSET_PASSWORD = os.environ.get('BRICKSET_PASSWORD')
    BRICKSET_API_URL = 'https://brickset.com/api/v3.asmx'
    
    # Pagination
    SETS_PER_PAGE = int(os.environ.get('SETS_PER_PAGE', 20))


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


class ProductionConfig(Config):
    """Production configuration."""
    DEBUG = False
    TESTING = False


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


config = {
    'development': DevelopmentConfig,
    'production': ProductionConfig,
    'testing': TestingConfig,
    'default': DevelopmentConfig
}