from __future__ import annotations

from datetime import UTC, datetime, timedelta
from typing import Literal

from app.database.pp_best_score import PPBestScore
from app.database.score import Score, get_leaderboard
from app.dependencies.database import Database
from app.models.mods import int_to_mods, mod_to_save, mods_to_int
from app.models.score import GameMode, LeaderboardType

from .router import AllStrModel, router

from fastapi import HTTPException, Query
from sqlalchemy.orm import joinedload
from sqlmodel import col, exists, select


class V1Score(AllStrModel):
    beatmap_id: int | None = None
    username: str | None = None
    score_id: int
    score: int
    maxcombo: int | None = None
    count50: int
    count100: int
    count300: int
    countmiss: int
    countkatu: int
    countgeki: int
    perfect: bool
    enabled_mods: int
    user_id: int
    date: datetime
    rank: str
    pp: float
    replay_available: bool

    @classmethod
    async def from_db(cls, score: Score):
        return cls(
            beatmap_id=score.beatmap_id,
            username=score.user.username,
            score_id=score.id,
            score=score.total_score,
            maxcombo=score.max_combo,
            count50=score.n50,
            count100=score.n100,
            count300=score.n300,
            countmiss=score.nmiss,
            countkatu=score.nkatu,
            countgeki=score.ngeki,
            perfect=score.is_perfect_combo,
            enabled_mods=mods_to_int(score.mods),
            user_id=score.user_id,
            date=score.ended_at,
            rank=score.rank,
            pp=score.pp,
            replay_available=score.has_replay,
        )


@router.get(
    "/get_user_best",
    response_model=list[V1Score],
    name="获取用户最好成绩",
    description="获取指定用户的最好成绩。",
)
async def get_user_best(
    session: Database,
    user: str = Query(..., alias="u", description="用户"),
    ruleset_id: int = Query(0, alias="m", description="Ruleset ID", ge=0),
    type: Literal["string", "id"] | None = Query(None, description="用户类型：string 用户名称 / id 用户 ID"),
    limit: int = Query(10, ge=1, le=100, description="返回的成绩数量"),
):
    try:
        scores = (
            await session.exec(
                select(Score)
                .where(
                    Score.user_id == user if type == "id" or user.isdigit() else col(Score.user).has(username=user),
                    Score.gamemode == GameMode.from_int_extra(ruleset_id),
                    exists().where(col(PPBestScore.score_id) == Score.id),
                )
                .order_by(col(Score.pp).desc())
                .options(joinedload(Score.beatmap))
                .limit(limit)
            )
        ).all()
        return [await V1Score.from_db(score) for score in scores]
    except KeyError:
        raise HTTPException(400, "Invalid request")


@router.get(
    "/get_user_recent",
    response_model=list[V1Score],
    name="获取用户最近成绩",
    description="获取指定用户的最近成绩。",
)
async def get_user_recent(
    session: Database,
    user: str = Query(..., alias="u", description="用户"),
    ruleset_id: int = Query(0, alias="m", description="Ruleset ID", ge=0),
    type: Literal["string", "id"] | None = Query(None, description="用户类型：string 用户名称 / id 用户 ID"),
    limit: int = Query(10, ge=1, le=100, description="返回的成绩数量"),
):
    try:
        scores = (
            await session.exec(
                select(Score)
                .where(
                    Score.user_id == user if type == "id" or user.isdigit() else col(Score.user).has(username=user),
                    Score.gamemode == GameMode.from_int_extra(ruleset_id),
                    Score.ended_at > datetime.now(UTC) - timedelta(hours=24),
                )
                .order_by(col(Score.pp).desc())
                .options(joinedload(Score.beatmap))
                .limit(limit)
            )
        ).all()
        return [await V1Score.from_db(score) for score in scores]
    except KeyError:
        raise HTTPException(400, "Invalid request")


@router.get(
    "/get_scores",
    response_model=list[V1Score],
    name="获取成绩",
    description="获取指定谱面的成绩。",
)
async def get_scores(
    session: Database,
    user: str | None = Query(None, alias="u", description="用户"),
    beatmap_id: int = Query(alias="b", description="谱面 ID"),
    ruleset_id: int = Query(0, alias="m", description="Ruleset ID", ge=0),
    type: Literal["string", "id"] | None = Query(None, description="用户类型：string 用户名称 / id 用户 ID"),
    limit: int = Query(10, ge=1, le=100, description="返回的成绩数量"),
    mods: int = Query(0, description="成绩的 MOD"),
):
    try:
        if user is not None:
            scores = (
                await session.exec(
                    select(Score)
                    .where(
                        Score.gamemode == GameMode.from_int_extra(ruleset_id),
                        Score.beatmap_id == beatmap_id,
                        Score.user_id == user if type == "id" or user.isdigit() else col(Score.user).has(username=user),
                    )
                    .options(joinedload(Score.beatmap))
                    .order_by(col(Score.classic_total_score).desc())
                )
            ).all()
        else:
            scores, _, _ = await get_leaderboard(
                session,
                beatmap_id,
                GameMode.from_int_extra(ruleset_id),
                LeaderboardType.GLOBAL,
                mod_to_save(int_to_mods(mods)),
                limit=limit,
            )
        return [await V1Score.from_db(score) for score in scores]
    except KeyError:
        raise HTTPException(400, "Invalid request")