from collections.abc import Mapping, Sequence
import json
from typing import List, Any

from app import app
from app.lists import lists
from app.models.base import MirrorList
from app.terraform.terraform import TerraformAutomation


def obfuscator(obj: Any) -> Any:
    if isinstance(obj, str):
        return "".join([f"!AAA!{hex(ord(c))[2:].zfill(4)}" for c in obj])
    if isinstance(obj, Mapping):
        return {obfuscator(k): obfuscator(v) for k, v in obj.items()}
    if isinstance(obj, Sequence):
        return [obfuscator(i) for i in obj]
    return obj


def json_encode(obj: Any, obfuscate: bool) -> str:
    if obfuscate:
        obj = obfuscator(obj)
        s = json.dumps(obj).replace("!AAA!", "\\u")
        return s
    return json.dumps(obj, indent=2, sort_keys=True)


def javascript_encode(obj: Any, obfuscate: bool) -> str:
    return "mirrors = " + json_encode(obj, obfuscate) + ";"


class ListAutomation(TerraformAutomation):
    template: str
    """
    Terraform configuration template using Jinja 2.
    """

    template_parameters: List[str]
    """
    List of parameters to be read from the application configuration for use
    in the templating of the Terraform configuration.
    """

    def tf_generate(self) -> None:
        self.tf_write(
            self.template,
            lists=MirrorList.query.filter(
                MirrorList.destroyed.is_(None),
                MirrorList.provider == self.provider,
            ).all(),
            global_namespace=app.config['GLOBAL_NAMESPACE'],
            **{
                k: app.config[k.upper()]
                for k in self.template_parameters
            }
        )
        for format_ in lists:
            for obfuscate in [True, False]:
                with open(self.working_directory(f"{format_}{'.jsno' if obfuscate else '.json'}"), 'w') as out:
                    out.write(json_encode(lists[format_](), obfuscate))
                with open(self.working_directory(f"{format_}{'.jso' if obfuscate else '.js'}"), 'w') as out:
                    out.write(javascript_encode(lists[format_](), obfuscate))