"""Tomie-specific parts of the Unity reader: ResourceManager actors and original variables."""
import json

from app.converter.compatibility import Issue
from app.games.hooks import ReaderHooks
from app.games.tomie.profile import PROFILE, extract_tables


class TomieHooks(ReaderHooks):
    def begin(self, package, root):
        package.profile = PROFILE
        package.function_data = extract_tables(root)

    def accept_duplicate_script(self, name):
        # This pinned build contains an editor/addressable Init alongside the main
        # corpus. The recovered port uses the main ResourceManager copy; it is read first.
        return name == "Init"

    def scan_object(self, package, obj, ctx):
        kind = obj.type.name
        if kind == "ResourceManager" and ctx.media:
            self._actors(package, obj, ctx)
            return True
        if kind == "MonoBehaviour" and obj.peek_name() == "CustomVariablesConfiguration":
            self._defaults(package, obj, ctx)
            return True
        return False

    @staticmethod
    def _actors(package, obj, ctx):
        from UnityPy.classes import PPtr

        actor_keys = set()
        for key, pointer in obj.read_typetree()["m_Container"]:
            if not key.lower().startswith("characters/"):
                continue
            name = key.lower().removeprefix("characters/")
            actor_keys.add(name)
            actor = PPtr(assetsfile=obj.assets_file, **pointer).deref()
            # Unity exposes both the complete texture and its Sprite under the same
            # Resources key. Naninovel's texture actor uses the complete texture,
            # as does the recovered Godot port.
            if actor.type.name == "Sprite":
                continue
            if actor.type.name != "Texture2D":
                package.issues.append(Issue("unsupported_actor", "Не поддерживается тип персонажа Tomie", key))
                continue
            identity = f"{ctx.source.relative_to(ctx.root).as_posix()}:{actor.assets_file.name}:{actor.path_id}"
            previous = package.actor_resources.get(name)
            if previous and previous != identity:
                package.issues.append(Issue("conflicting_actor", "Различающиеся изображения персонажа Tomie", key))
            package.actor_resources[name] = identity
            package.resources.append((ctx.source, actor))
        for name in actor_keys - package.actor_resources.keys():
            package.issues.append(Issue("missing_actor_texture", "Не найдена полная текстура персонажа Tomie", name))

    @staticmethod
    def _defaults(package, obj, ctx):
        codec = ctx.codec(str(obj.assets_file.unity_version))
        node = obj.serialized_type.node or codec.node("Elringus.Naninovel.Runtime", "Naninovel.CustomVariablesConfiguration")
        config = obj.read_typetree(nodes=node)
        defaults = {entry["name"]: json.loads(entry["value"]) for entry in config["PredefinedVariables"]}
        if package.defaults and package.defaults != defaults:
            package.issues.append(Issue("conflicting_defaults", "Различающиеся исходные переменные Naninovel"))
        else:
            package.defaults = defaults