import os, sys, yaml
from jinja2 import Environment, FileSystemLoader
from pathlib import Path

class Config:
    def __init__(self):
        self.config_path = "config.yml"
        self.app_name = "microgen"
        self.app_description = "Simplistic static site generator"
        self.app_src_url = f"https://git.exocortex.ru/Exocortex/{self.app_name}"
        self.content_dir = 'content'
        self.templates_dir = 'templates'
        self.static_dir = 'static'
        self.output_dir = 'public'
        self.header_image = 'static/header.jpg'
        self.site_name = f"{self.app_name} library"
        self.theme = "default"
        self.debug = False
        if os.path.isfile (self.config_path):
            with open(self.config_path, "r") as f:
                config = yaml.safe_load(f)
                if config:
                    self.update_from_dict(config)


        # Get the script base_dir and check for templates dir
        if Path(f'themes/{self.theme}/templates').exists():
            self.base_dir = "."
        elif getattr(sys, 'frozen', False):
            # Running fron Pyinstaller-packed binary
            self.base_dir =  Path(sys._MEIPASS)
        else:
            # Running as a plain Python app
            self.base_dir = Path(__file__).resolve().parent    

        # Prepare template rendering engine
        if Path(f"themes/{self.theme}/templates").exists():
            # Use the templates from the initialized site instance and the installed theme 
            jinja_env_dir = f"themes/{self.theme}/templates"
            #logger.debug(f"Using locally initialized templates from {jinja_env_dir}")
        else:
            # Use default templates from the default theme shipped with the app
            # i.e. PyInstaller-packed single executable
            #logger.debug("Using shipped default temlpates.")
            jinja_env_dir = f"{self.base_dir}/themes/default/templates"
        self.env = Environment(loader=FileSystemLoader(f"{jinja_env_dir}"))
        self.env.globals['header_image'] = f"{self.base_dir}/themes/{self.theme}/static/images/header.jpg"
        self.index_template = self.env.get_template("index.html")
        self.content_item_template = self.env.get_template("content_item.html")  


    def update_from_dict(self, config_dict):
        for key, value in config_dict.items():
            setattr(self, key, value)

    def __repr__(self):
        return f"{self.__dict__}"
    
    def create_default_config(self):
        defaults = {
            "site_name": self.site_name,
            "theme": "default",
            "debug": False,
            "footer": "'' # Author / copyright / date / links, can be plaintext or valid HTML"
        }
        with open(self.config_path, mode="w", encoding="utf-8") as f:
            yaml.safe_dump(defaults, f)
    
config = Config()