"""Bounded native metadata shared by JSON and XML hierarchy observations."""

import json
import math
from typing import Any


def _finite_number(value: Any) -> bool:
    # Android ranges are finite floats. Reject malformed oversized JSON integers
    # before conversion, which otherwise raises OverflowError in math.isfinite.
    return type(value) in (int, float) and -1e308 <= value <= 1e308 and math.isfinite(value)


def native_control_state(node: dict[str, Any]) -> dict[str, Any]:
    state: dict[str, Any] = {}
    for key in ("range", "actions"):
        value = node.get(key)
        if isinstance(value, str) and len(value) <= 8192:
            try:
                value = json.loads(value)
            except ValueError:
                value = None
        if key == "actions" and isinstance(value, list):
            state[key] = [item for item in value[:32] if isinstance(item, str) and len(item) <= 64]
        elif key == "range" and isinstance(value, dict):
            numbers = [value.get(k) for k in ("min", "max", "current")]
            if all(_finite_number(v) for v in numbers):
                if numbers[0] <= numbers[2] <= numbers[1]:
                    state[key] = {k: value[k] for k in ("min", "max", "current")}
                    state[key]["type"] = value.get("type")
    for key in (
        "visible",
        "enabled",
        "scrollable",
        "editable",
        "password",
        "checked",
        "checkable",
        "selected",
        "focused",
    ):
        value = node.get(key)
        if isinstance(value, bool) or value in ("true", "false"):
            state[key] = value is True or value == "true"
    for key in ("selection_start", "selection_end"):
        value = node.get(key, node.get(key.replace("_", "-")))
        if isinstance(value, str) and len(value) < 12:
            digits = value[1:] if value.startswith("-") else value
            if digits and digits.isascii() and digits.isdecimal():
                value = int(value)
        if isinstance(value, int) and not isinstance(value, bool) and -1 <= value <= 2**31 - 1:
            state[key] = value
    return state


def informative_native_control(state: dict[str, Any]) -> bool:
    return bool(
        state.get("range")
        or state.get("scrollable")
        or set(state.get("actions", []))
        & {
            "click",
            "long_click",
            "set_progress",
            "set_text",
            "set_selection",
            "ime_enter",
        }
    )