from __future__ import annotations

import math
from typing import Mapping


USER_OPERATION_PRIORITY: dict[str, int] = {
    "push_pull_plane": 10,
    "resize_cylinder": 20,
    "resize_depth": 24,
    "suppress_cylinder": 28,
    "resize_slot_width": 30,
    "resize_slot_depth": 31,
    "resize_slot_arc_length": 34,
    "resize_slot_angular_span": 35,
    "resize_boss": 40,
    "resize_boss_height": 41,
    "move_boss_axis": 44,
    "inspect_existing_fillet": 50,
    "inspect_existing_chamfer": 51,
    "fillet_edge": 52,
    "chamfer_edge": 53,
    "resize_shell_thickness": 60,
    "resize_edge_length": 70,
    "resize_ellipse_edge_major_radius": 72,
    "resize_ellipse_edge_minor_radius": 73,
}

USER_PRIORITY_BUCKETS: tuple[tuple[int, str, str], ...] = (
    (10, "Face 面编辑", "最常用：平面拉伸/切除、面尺寸、中心和偏移。"),
    (20, "孔", "常用：孔径、孔深、孔轴心和封堵。"),
    (30, "槽/半孔", "常用：槽宽、槽深、弧长、弧角和槽轴心。"),
    (40, "凸台/外圆", "常用：凸台直径、高度和轴心。"),
    (50, "圆角/倒角", "常用但风险更高：已有圆角半径、新增圆角或倒角。"),
    (60, "壳体厚度", "专项：相对面可识别时修改局部厚度。"),
    (70, "Edge 边编辑", "受限：边长、端点、圆边半径等一级关系编辑。"),
    (80, "解析曲面", "较少直接修改：圆锥、球面、环面等解析曲面参数。"),
    (90, "只读/诊断", "暂未稳定归类为可修改特征。"),
)


def _text(value: object) -> str:
    return str(value or "").strip()


def _float_or_none(value: object) -> float | None:
    try:
        return float(value)
    except (TypeError, ValueError):
        return None


def _is_effectively_full_cylinder(info: Mapping[str, object]) -> bool:
    if bool(info.get("is_full_cylinder")):
        return True
    for key in ("same_domain_angular_span", "angular_span"):
        angular_span = _float_or_none(info.get(key))
        if angular_span is not None and angular_span >= math.tau * 0.92:
            return True
    return False


def feature_recognition_priority(info: Mapping[str, object]) -> int:
    """Rank feature candidates by likely user editing frequency.

    The rank is intentionally product-facing, not a geometry confidence score:
    lower numbers should appear earlier in editable-feature lists.
    """
    operation_key = _text(info.get("operation_key"))
    if operation_key in USER_OPERATION_PRIORITY:
        return USER_OPERATION_PRIORITY[operation_key]

    surface = _text(info.get("surface"))
    feature_guess = _text(info.get("feature_guess"))
    feature_type = _text(info.get("feature_type"))
    feature_actions = _text(info.get("feature_edit_actions"))
    ready_actions = _text(info.get("recognition_ready_actions"))

    combined_text = "；".join(item for item in (feature_type, feature_actions, ready_actions) if item)

    if _text(info.get("existing_chamfer_status")) == "candidate" or feature_guess == "chamfer candidate":
        return 50

    if surface == "plane":
        return 10

    if surface == "cylinder":
        if feature_guess == "hole/groove candidate":
            angular_span = _float_or_none(info.get("angular_span"))
            if (
                not _is_effectively_full_cylinder(info)
                and angular_span is not None
                and angular_span < math.tau * 0.92
            ) or _text(info.get("slot_kind")) == "partial-cylindrical-groove" or "槽/半孔候选" in feature_type:
                return 30
            return 20
        if feature_guess == "boss/outer-round candidate":
            return 40
        if feature_guess == "round/fillet candidate":
            return 50
        if "孔" in combined_text:
            return 20
        if "槽" in combined_text or "半孔" in combined_text:
            return 30
        if "凸台" in combined_text or "外圆" in combined_text:
            return 40
        if "圆角" in combined_text or "倒圆" in combined_text:
            return 50
        return 90

    if surface == "edge" or _text(info.get("curve")):
        if "圆角" in combined_text:
            return 52
        if "倒角" in combined_text:
            return 53
        return 70

    if surface in {"cone", "sphere", "torus"}:
        return 80

    if "壳体" in combined_text or _text(info.get("shell_region_status")) == "candidate":
        return 60

    return 90


def feature_recognition_priority_bucket(priority: int) -> tuple[int, str, str]:
    selected = USER_PRIORITY_BUCKETS[-1]
    for bucket in USER_PRIORITY_BUCKETS:
        if priority >= bucket[0]:
            selected = bucket
        else:
            break
    return selected


def feature_recognition_priority_label(info: Mapping[str, object]) -> str:
    priority = feature_recognition_priority(info)
    _start, label, _reason = feature_recognition_priority_bucket(priority)
    return f"{priority:02d} · {label}"


def feature_recognition_priority_reason(info: Mapping[str, object]) -> str:
    priority = feature_recognition_priority(info)
    _start, _label, reason = feature_recognition_priority_bucket(priority)
    return reason


def feature_recognition_sort_key(info: Mapping[str, object]) -> tuple[int, int, int, int]:
    status_order = {"ready": 0, "candidate": 0, "caution": 1, "blocked": 2}
    risk_order = {"low": 0, "medium": 1, "high": 2, "blocked": 3}
    target_id = info.get("target_id", info.get("face_id", info.get("edge_id", -1)))
    try:
        numeric_target = int(target_id)
    except (TypeError, ValueError):
        numeric_target = -1
    return (
        feature_recognition_priority(info),
        status_order.get(_text(info.get("status")), 9),
        risk_order.get(_text(info.get("risk")), 9),
        numeric_target,
    )