from __future__ import annotations

import math
from typing import TYPE_CHECKING

from app.config import settings
from app.log import logger
from app.models.beatmap import BeatmapAttributes
from app.models.mods import APIMod
from app.models.score import GameMode

from osupyparser import OsuFile
from osupyparser.osu.objects import Slider
from sqlmodel import col, exists, select
from sqlmodel.ext.asyncio.session import AsyncSession

try:
    import rosu_pp_py as rosu
except ImportError:
    raise ImportError(
        "rosu-pp-py is not installed. "
        "Please install it.\n"
        "   Official: uv add rosu-pp-py\n"
        "   ppy-sb: uv add git+https://github.com/ppy-sb/rosu-pp-py.git"
    )

if TYPE_CHECKING:
    from app.database.score import Score


def clamp[T: int | float](n: T, min_value: T, max_value: T) -> T:
    if n < min_value:
        return min_value
    elif n > max_value:
        return max_value
    else:
        return n


def calculate_beatmap_attribute(
    beatmap: str,
    gamemode: GameMode | None = None,
    mods: int | list[APIMod] | list[str] = 0,
) -> BeatmapAttributes:
    map = rosu.Beatmap(content=beatmap)
    if gamemode is not None:
        map.convert(gamemode.to_rosu(), mods)  # pyright: ignore[reportArgumentType]
    diff = rosu.Difficulty(mods=mods).calculate(map)
    return BeatmapAttributes(
        star_rating=diff.stars,
        max_combo=diff.max_combo,
        aim_difficulty=diff.aim,
        aim_difficult_slider_count=diff.aim_difficult_slider_count,
        speed_difficulty=diff.speed,
        speed_note_count=diff.speed_note_count,
        slider_factor=diff.slider_factor,
        aim_difficult_strain_count=diff.aim_difficult_strain_count,
        speed_difficult_strain_count=diff.speed_difficult_strain_count,
        mono_stamina_factor=diff.stamina,
    )


async def calculate_pp(score: "Score", beatmap: str, session: AsyncSession) -> float:
    from app.database.beatmap import BannedBeatmaps

    if settings.suspicious_score_check:
        beatmap_banned = (
            await session.exec(
                select(exists()).where(
                    col(BannedBeatmaps.beatmap_id) == score.beatmap_id
                )
            )
        ).first()
        if beatmap_banned:
            return 0
        is_suspicious = is_suspicious_beatmap(beatmap)
        if is_suspicious:
            session.add(BannedBeatmaps(beatmap_id=score.beatmap_id))
            logger.warning(f"Beatmap {score.beatmap_id} is suspicious, banned")
            return 0

    map = rosu.Beatmap(content=beatmap)
    map.convert(score.gamemode.to_rosu(), score.mods)  # pyright: ignore[reportArgumentType]
    perf = rosu.Performance(
        mods=score.mods,
        lazer=True,
        accuracy=score.accuracy,
        combo=score.max_combo,
        large_tick_hits=score.nlarge_tick_hit or 0,
        slider_end_hits=score.nslider_tail_hit or 0,
        small_tick_hits=score.nsmall_tick_hit or 0,
        n_geki=score.ngeki,
        n_katu=score.nkatu,
        n300=score.n300,
        n100=score.n100,
        n50=score.n50,
        misses=score.nmiss,
    )
    attrs = perf.calculate(map)
    pp = attrs.pp

    # mrekk bp1: 2048pp; ppy-sb top1 rxbp1: 2198pp
    if settings.suspicious_score_check and (
        (attrs.difficulty.stars > 25 and score.accuracy < 0.8) or pp > 2300
    ):
        logger.warning(
            f"User {score.user_id} played {score.beatmap_id} with {pp=} "
            f"acc={score.accuracy}. The score is suspicious and return 0pp"
            f"({score.id=})"
        )
        return 0
    return pp


# https://osu.ppy.sh/wiki/Gameplay/Score/Total_score
def calculate_level_to_score(n: int) -> float:
    if n <= 100:
        return 5000 / 3 * (4 * n**3 - 3 * n**2 - n) + 1.25 * 1.8 ** (n - 60)
    else:
        return 26931190827 + 99999999999 * (n - 100)


# https://github.com/ppy/osu-queue-score-statistics/blob/4bdd479530408de73f3cdd95e097fe126772a65b/osu.Server.Queues.ScoreStatisticsProcessor/Processors/TotalScoreProcessor.cs#L70-L116
def calculate_score_to_level(total_score: int) -> float:
    to_next_level = [
        30000,
        100000,
        210000,
        360000,
        550000,
        780000,
        1050000,
        1360000,
        1710000,
        2100000,
        2530000,
        3000000,
        3510000,
        4060000,
        4650000,
        5280000,
        5950000,
        6660000,
        7410000,
        8200000,
        9030000,
        9900000,
        10810000,
        11760000,
        12750000,
        13780000,
        14850000,
        15960000,
        17110000,
        18300000,
        19530000,
        20800000,
        22110000,
        23460000,
        24850000,
        26280000,
        27750000,
        29260000,
        30810000,
        32400000,
        34030000,
        35700000,
        37410000,
        39160000,
        40950000,
        42780000,
        44650000,
        46560000,
        48510000,
        50500000,
        52530000,
        54600000,
        56710000,
        58860000,
        61050000,
        63280000,
        65550000,
        67860000,
        70210001,
        72600001,
        75030002,
        77500003,
        80010006,
        82560010,
        85150019,
        87780034,
        90450061,
        93160110,
        95910198,
        98700357,
        101530643,
        104401157,
        107312082,
        110263748,
        113256747,
        116292144,
        119371859,
        122499346,
        125680824,
        128927482,
        132259468,
        135713043,
        139353477,
        143298259,
        147758866,
        153115959,
        160054726,
        169808506,
        184597311,
        208417160,
        248460887,
        317675597,
        439366075,
        655480935,
        1041527682,
        1733419828,
        2975801691,
        5209033044,
        9225761479,
        99999999999,
        99999999999,
        99999999999,
        99999999999,
        99999999999,
        99999999999,
        99999999999,
        99999999999,
        99999999999,
        99999999999,
        99999999999,
        99999999999,
        99999999999,
        99999999999,
        99999999999,
        99999999999,
    ]

    remaining_score = total_score
    level = 0.0

    while remaining_score > 0:
        next_level_requirement = to_next_level[
            min(len(to_next_level) - 1, round(level))
        ]
        level += min(1, remaining_score / next_level_requirement)
        remaining_score -= next_level_requirement

    return level + 1


# https://osu.ppy.sh/wiki/Performance_points/Weighting_system
def calculate_pp_weight(index: int) -> float:
    return math.pow(0.95, index)


def calculate_weighted_pp(pp: float, index: int) -> float:
    return calculate_pp_weight(index) * pp if pp > 0 else 0.0


def calculate_weighted_acc(acc: float, index: int) -> float:
    return calculate_pp_weight(index) * acc if acc > 0 else 0.0


def is_suspicious_beatmap(content: str) -> bool:
    osufile = OsuFile(content=content.encode("utf-8-sig")).parse_file()
    for obj in osufile.hit_objects:
        if obj.pos.x < 0 or obj.pos.y < 0 or obj.pos.x > 512 or obj.pos.y > 384:
            return True
        if isinstance(obj, Slider):
            for point in obj.points:
                if point.x < 0 or point.y < 0 or point.x > 512 or point.y > 384:
                    return True
    return False