from __future__ import annotations

from typing import Any
from xml.etree import ElementTree as ET

from .match_parser import local_name, safe_int


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


def _team_payload(node: ET.Element, language: str) -> dict[str, Any]:
    attrs = {str(key): _text(value) for key, value in node.attrib.items()}
    name_ru = attrs.get("name", "")
    name_en = attrs.get("nameen", "")
    return {
        "id": attrs.get("id", ""),
        "entry_id": attrs.get("id", ""),
        "club_id": attrs.get("clubid", ""),
        "name": name_en if language == "en" and name_en else name_ru or name_en,
        "names": {"ru": name_ru, "en": name_en},
        "rank": safe_int(attrs.get("rank")),
        "games": safe_int(attrs.get("gp")),
        "wins": safe_int(attrs.get("w")),
        "overtime_wins": safe_int(attrs.get("otw")),
        "shootout_wins": safe_int(attrs.get("sow")),
        "shootout_losses": safe_int(attrs.get("sol")),
        "overtime_losses": safe_int(attrs.get("otl")),
        "losses": safe_int(attrs.get("l")),
        "points": safe_int(attrs.get("pts")),
        "points_pct": attrs.get("pts_pct", ""),
        "goals_for": safe_int(attrs.get("gf")),
        "goals_against": safe_int(attrs.get("ga")),
        "penalty_minutes": safe_int(attrs.get("pim")),
        "opponent_penalty_minutes": safe_int(attrs.get("pima")),
        "playoffs_in": attrs.get("playoffs_in", "").upper() == "Y",
        "playoffs_out": attrs.get("playoffs_out", "").upper() == "Y",
        "highlighted": False,
        "side": "",
    }


def _group_payload(
    node: ET.Element,
    *,
    language: str,
    fallback_id: str,
) -> dict[str, Any]:
    attrs = {str(key): _text(value) for key, value in node.attrib.items()}
    name_ru = attrs.get("name", "")
    name_en = attrs.get("name_en", "")
    teams = [
        _team_payload(child, language)
        for child in list(node)
        if local_name(child.tag).lower() == "team"
    ]
    return {
        "id": attrs.get("item") or attrs.get("id") or fallback_id,
        "name": name_en if language == "en" and name_en else name_ru or name_en,
        "names": {"ru": name_ru, "en": name_en},
        "standings_type": attrs.get("standings_type", ""),
        "conference": attrs.get("conference", ""),
        "playoff_places": safe_int(attrs.get("in_playoff")),
        "teams": teams,
    }


def parse_standings_xml(
    content: bytes | str,
    *,
    language: str = "ru",
) -> dict[str, Any]:
    raw = content.encode("utf-8") if isinstance(content, str) else content
    root = ET.fromstring(raw)
    if local_name(root.tag).lower() != "standings":
        raise ValueError("Stat2TV вернул неизвестный формат турнирной таблицы")

    league_groups: list[dict[str, Any]] = []
    conference_groups: list[dict[str, Any]] = []
    division_groups: list[dict[str, Any]] = []

    for child in list(root):
        child_tag = local_name(child.tag).lower()
        if child_tag == "league":
            league_groups.append(
                _group_payload(child, language=language, fallback_id="league")
            )
        elif child_tag == "conferences":
            conference_groups.extend(
                _group_payload(
                    group,
                    language=language,
                    fallback_id=f"conference-{index}",
                )
                for index, group in enumerate(list(child), start=1)
                if local_name(group.tag).lower() == "conference"
            )
        elif child_tag == "divisions":
            division_groups.extend(
                _group_payload(
                    group,
                    language=language,
                    fallback_id=f"division-{index}",
                )
                for index, group in enumerate(list(child), start=1)
                if local_name(group.tag).lower() == "division"
            )

    variants = [
        {
            "id": "league",
            "label": "League" if language == "en" else "Общая",
            "groups": league_groups,
        },
        {
            "id": "conferences",
            "label": "Conferences" if language == "en" else "Конференции",
            "groups": conference_groups,
        },
        {
            "id": "divisions",
            "label": "Divisions" if language == "en" else "Дивизионы",
            "groups": division_groups,
        },
    ]
    variants = [variant for variant in variants if variant["groups"]]
    return {
        "tournament_id": _text(root.attrib.get("idtournament")),
        "generated_at": _text(root.attrib.get("genDate")),
        "order": _text(root.attrib.get("order")),
        "available": bool(variants),
        "variants": variants,
    }