"""Profilgebundenes Backlog-Vokabular — ADP P3 / AP2.4 Methoden-Vertrag."""

from __future__ import annotations

from typing import Any

_EMPTY: dict[str, Any] = {
    "profile_key": "none",
    "kinds": [],
    "labels": {},
    "default_kind": "story",
    "epic_hierarchy": False,
    "convertible_kinds": [],
    "capabilities": {
        "sprint_commit": False,
        "epic_hierarchy": False,
    },
}

_AGILE_INTAKE: dict[str, Any] = {
    "profile_key": "agile_intake",
    "kinds": ["epic", "story", "bug", "issue", "tech_debt"],
    "labels": {
        "epic": "Epic",
        "story": "Story",
        "bug": "Bug",
        "issue": "Issue",
        "tech_debt": "Technische Schuld",
    },
    "default_kind": "story",
    "epic_hierarchy": True,
    "convertible_kinds": ["story", "bug", "issue", "tech_debt"],
}

_CONTINUOUS_INTAKE: dict[str, Any] = {
    "profile_key": "continuous_intake",
    "kinds": ["story", "bug", "issue", "tech_debt"],
    "labels": {
        "story": "Idee",
        "bug": "Bug",
        "issue": "Störung",
        "tech_debt": "Technische Schuld",
    },
    "default_kind": "story",
    "epic_hierarchy": False,
    "convertible_kinds": ["story", "bug", "issue", "tech_debt"],
}

_STANDARD_INTAKE: dict[str, Any] = {
    "profile_key": "standard_intake",
    "kinds": ["story", "bug", "issue", "tech_debt"],
    "labels": {
        "story": "Story",
        "bug": "Bug",
        "issue": "Issue",
        "tech_debt": "Technische Schuld",
    },
    "default_kind": "story",
    "epic_hierarchy": False,
    "convertible_kinds": ["story", "bug", "issue", "tech_debt"],
}


def _with_capabilities(
    vocabulary: dict[str, Any],
    *,
    steering_elements: frozenset[str],
) -> dict[str, Any]:
    result = dict(vocabulary)
    sprint_commit = "work_cycle_scope" in steering_elements
    epic_hierarchy = "backlog_epic_hierarchy" in steering_elements
    result["epic_hierarchy"] = epic_hierarchy
    result["capabilities"] = {
        "sprint_commit": sprint_commit,
        "epic_hierarchy": epic_hierarchy,
    }
    return result


def resolve_backlog_vocabulary(
    *,
    data_slices: list[str],
    method_key: str,
    steering_elements: frozenset[str],
) -> dict[str, Any]:
    """Backlog-Typen/Labels aus effektivem Methoden-Vertrag — nicht aus Page-Ifs."""
    if "backlog" not in data_slices:
        return dict(_EMPTY)

    if "backlog_epic_hierarchy" in steering_elements:
        return _with_capabilities(dict(_AGILE_INTAKE), steering_elements=steering_elements)

    if method_key == "continuous_product":
        return _with_capabilities(
            dict(_CONTINUOUS_INTAKE), steering_elements=steering_elements
        )

    return _with_capabilities(dict(_STANDARD_INTAKE), steering_elements=steering_elements)