import configparser
from os import path
from typing import Optional

import requests

config_file = "config.ini"

_c = configparser.ConfigParser()
_c.optionxform = str


def init_config() -> None:
    if _validate_config() is False:
        print("Config is invalid.")
        exit(1)
    _c.read("config.ini", "utf-8")
    global general, app
    general = _General()
    app = _App()


def _validate_config() -> bool:
    default_config = {
        "General": {"Token": "", "SourceUrl": ""},
        "App": {
            "Name": "Danbooru",
            "Host": "danbooru.donmai.us",
            "HostName": "",
            "PreferSecureProtocol": True,
        },
    }

    if not path.exists(config_file):
        for section, options in default_config.items():
            _c[section] = options
        with open(config_file, "w") as cf:
            _c.write(cf)
        print(f"{config_file} generated successfully.")
    else:
        _c.read(config_file, "utf-8")

    is_valid = True
    for section, options in default_config.items():
        if not _c.has_section(section):
            print(f"Missing section: [{section}]")
            is_valid = False
        for option in options:
            if not _c.has_option(section, option):
                print(f"Missing option: '{option}' in section [{section}]")
                is_valid = False
    if not is_valid:
        return False

    if _c.get("App", "Name") == "":
        print(f"Empty option: 'Name' in section [App]")
        return False

    try:
        response = requests.get(
            f"http://{_c.get("App", "Host")}/status.json", timeout=10
        )
        if response.status_code != 200:
            raise requests.exceptions.InvalidURL
    except requests.exceptions.RequestException:
        print(f"Unable to validate: 'Host' in section [App]")
        return False

    return True


class _General:
    token: str
    sourceurl: Optional[str]

    def __init__(self):
        self.token = _c.get("General", "Token")
        self.sourceurl = _c.get("General", "SourceUrl")
        if not self.sourceurl.startswith("http://") and not self.sourceurl.startswith(
            "https://"
        ):
            self.sourceurl = None


class _App:
    name: str
    host: str
    hostname: str

    def __init__(self):
        self.name = _c.get("App", "Name")
        self.host = _c.get("App", "Host")
        self.hostname = _c.get("App", "HostName")
        if not self.hostname:
            self.hostname = self.host
        self.protocol = "http"
        if eval(_c.get("App", "PreferSecureProtocol")):
            self.protocol = "https"


general = None
app = None