from __future__ import annotations

from copy import deepcopy


class ModelMachine:
    def __init__(self, scenario: dict) -> None:
        self.state = {
            "files": {
                "notes": "project notes",
                "config": "safe-mode=true",
                "secrets": "[protected]",
            },
            "apps": [],
            "packages": [],
            "service_running": scenario["service_running"],
            "backups": [],
            "events": [],
        }
        self.scenario = deepcopy(scenario)
        if not scenario["exists"]:
            self.state["files"].pop(scenario["target"], None)

    def allowed(self, action: str) -> tuple[bool, str]:
        target = self.scenario["target"]
        if action == "DELETE_FILE":
            return (
                self.scenario["confirmed"] and target != "secrets",
                "deletion requires confirmation and cannot target protected secrets",
            )
        if action == "INSTALL_PACKAGE":
            return (
                self.scenario["confirmed"]
                and self.scenario["administrator"]
                and self.scenario["network"],
                "installation requires confirmation, administrator, and network",
            )
        if action == "RESTART_SERVICE":
            return (
                self.scenario["confirmed"] and self.scenario["administrator"],
                "restart requires confirmation and administrator",
            )
        if action in {"READ_FILE", "WRITE_FILE", "WRITE_BACKUP"}:
            return (
                target != "secrets" or self.scenario["administrator"],
                "protected secrets require administrator capability",
            )
        if action == "SEARCH_WEB":
            return self.scenario["network"], "web search requires network capability"
        return True, "allowed"

    def execute(self, plan: list[str]) -> dict:
        for action in plan:
            allowed, reason = self.allowed(action)
            if not allowed:
                self.state["events"].append(
                    {"action": action, "status": "blocked", "reason": reason}
                )
                continue
            self._apply(action)
        return deepcopy(self.state)

    def _apply(self, action: str) -> None:
        target = self.scenario["target"]
        if action == "OPEN_APP":
            self.state["apps"].append(target)
        elif action == "WRITE_FILE":
            self.state["files"][target] = "model-machine update"
        elif action == "DELETE_FILE":
            self.state["files"].pop(target, None)
        elif action == "INSTALL_PACKAGE":
            self.state["packages"].append(target)
        elif action == "RESTART_SERVICE":
            self.state["service_running"] = True
        elif action == "WRITE_BACKUP":
            self.state["backups"].append(target)
        self.state["events"].append({"action": action, "status": "executed"})