g0v0-server/app/models/mods.py

from __future__ import annotations

import json
from typing import Literal, NotRequired, TypedDict

from app.path import STATIC_DIR

from msgpack_lazer_api import APIMod as MsgpackAPIMod


class APIMod(TypedDict):
    acronym: str
    settings: NotRequired[dict[str, bool | float | str | int]]


# https://github.com/ppy/osu-api/wiki#mods
API_MOD_TO_LEGACY: dict[str, int] = {
    "NF": 1 << 0,  # No Fail
    "EZ": 1 << 1,  # Easy
    "TD": 1 << 2,  # Touch Device
    "HD": 1 << 3,  # Hidden
    "HR": 1 << 4,  # Hard Rock
    "SD": 1 << 5,  # Sudden Death
    "DT": 1 << 6,  # Double Time
    "RX": 1 << 7,  # Relax
    "HT": 1 << 8,  # Half Time
    "NC": 1 << 9,  # Nightcore
    "FL": 1 << 10,  # Flashlight
    "AT": 1 << 11,  # Autoplay
    "SO": 1 << 12,  # Spun Out
    "AP": 1 << 13,  # Auto Pilot
    "PF": 1 << 14,  # Perfect
    "4K": 1 << 15,  # 4K
    "5K": 1 << 16,  # 5K
    "6K": 1 << 17,  # 6K
    "7K": 1 << 18,  # 7K
    "8K": 1 << 19,  # 8K
    "FI": 1 << 20,  # Fade In
    "RD": 1 << 21,  # Random
    "CN": 1 << 22,  # Cinema
    "TP": 1 << 23,  # Target Practice
    "9K": 1 << 24,  # 9K
    "CO": 1 << 25,  # Key Co-op
    "1K": 1 << 26,  # 1K
    "3K": 1 << 27,  # 3K
    "2K": 1 << 28,  # 2K
    "SV2": 1 << 29,  # ScoreV2
    "MR": 1 << 30,  # Mirror
}
LEGACY_MOD_TO_API_MOD = {}
for k, v in API_MOD_TO_LEGACY.items():
    LEGACY_MOD_TO_API_MOD[v] = APIMod(acronym=k, settings={})
API_MOD_TO_LEGACY["NC"] |= API_MOD_TO_LEGACY["DT"]
API_MOD_TO_LEGACY["PF"] |= API_MOD_TO_LEGACY["SD"]


# see static/mods.json
class Settings(TypedDict):
    Name: str
    Type: str
    Label: str
    Description: str


class Mod(TypedDict):
    Acronym: str
    Name: str
    Description: str
    Type: str
    Settings: list[Settings]
    IncompatibleMods: list[str]
    RequiresConfiguration: bool
    UserPlayable: bool
    ValidForMultiplayer: bool
    ValidForFreestyleAsRequiredMod: bool
    ValidForMultiplayerAsFreeMod: bool
    AlwaysValidForSubmission: bool


API_MODS: dict[Literal[0, 1, 2, 3], dict[str, Mod]] = {}


def init_mods():
    mods_file = STATIC_DIR / "mods.json"
    raw_mods = json.loads(mods_file.read_text())
    for ruleset in raw_mods:
        ruleset_mods = {}
        for mod in ruleset["Mods"]:
            ruleset_mods[mod["Acronym"]] = mod
        API_MODS[ruleset["RulesetID"]] = ruleset_mods


def int_to_mods(mods: int) -> list[APIMod]:
    mod_list = []
    for mod in range(31):
        if mods & (1 << mod):
            mod_list.append(LEGACY_MOD_TO_API_MOD[(1 << mod)])
    if mods & (1 << 14):
        mod_list.remove(LEGACY_MOD_TO_API_MOD[(1 << 5)])
    if mods & (1 << 9):
        mod_list.remove(LEGACY_MOD_TO_API_MOD[(1 << 6)])
    return mod_list


def mods_to_int(mods: list[APIMod]) -> int:
    sum_ = 0
    for mod in mods:
        sum_ |= API_MOD_TO_LEGACY.get(mod["acronym"], 0)
    return sum_


NO_CHECK = "DO_NO_CHECK"

# FIXME: 这里为空表示了两种情况：mod 没有配置项；任何时候都可以获得 pp
# 如果是后者，则 mod 更新的时候可能会误判。
COMMON_CONFIG: dict[str, dict] = {
    "EZ": {"retries": 2},
    "NF": {},
    "HT": {"speed_change": 0.75, "adjust_pitch": NO_CHECK},
    "DC": {"speed_change": 0.75},
    "HR": {},
    "SD": {},
    "PF": {},
    "HD": {},
    "DT": {"speed_change": 1.5, "adjust_pitch": NO_CHECK},
    "NC": {"speed_change": 1.5},
    "FL": {"size_multiplier": 1.0, "combo_based_size": True},
    "AC": {},
    "MU": {},
    "TD": {},
}

RANKED_MODS: dict[int, dict[str, dict]] = {
    0: COMMON_CONFIG,
    1: COMMON_CONFIG,
    2: COMMON_CONFIG,
    3: COMMON_CONFIG,
}
# osu
RANKED_MODS[0]["HD"]["only_fade_approach_circles"] = False
RANKED_MODS[0]["FL"]["follow_delay"] = 1.0
RANKED_MODS[0]["BL"] = {}
RANKED_MODS[0]["NS"] = {}
RANKED_MODS[0]["SO"] = {}
RANKED_MODS[0]["TC"] = {}
# taiko
del RANKED_MODS[1]["EZ"]["retries"]
# catch
RANKED_MODS[2]["NS"] = {}
# mania
del RANKED_MODS[3]["HR"]
RANKED_MODS[3]["FL"]["combo_based_size"] = False
RANKED_MODS[3]["MR"] = {}
for i in range(4, 10):
    RANKED_MODS[3][f"{i}K"] = {}


def mods_can_get_pp(ruleset_id: int, mods: list[APIMod]) -> bool:
    ranked_mods = RANKED_MODS[ruleset_id]
    for mod in mods:
        mod["settings"] = mod.get("settings", {})
        if (settings := ranked_mods.get(mod["acronym"])) is None:
            return False
        if settings == {}:
            continue
        for setting, value in mod["settings"].items():
            if (expected_value := settings.get(setting)) is None:
                return False
            if expected_value != NO_CHECK and value != expected_value:
                return False
    return True


def msgpack_to_apimod(mod: MsgpackAPIMod) -> APIMod:
    """
    Convert a MsgpackAPIMod to an APIMod.
    """
    return APIMod(
        acronym=mod.acronym,
        settings=mod.settings,
    )