# -*- coding: utf-8 -*-

from typing import Union

from fastapi import Query, Depends
from sqlalchemy import between
from sqlalchemy.ext.asyncio import AsyncSession

from crud.marktask import crud_task
from models.marktask import MarkTask
from models.user import Teacher
from utils.depends import get_async_db, get_current_user


async def analysis_line_chart(cid: str = Query("", description="班级ID"),
                              year: Union[int,
                                          str] = Query(None,
                                                       description="年份，单个或范围，范围逗号分隔，形式：开始年,结束年"),
                              db: AsyncSession = Depends(get_async_db),
                              current_user: Teacher = Depends(get_current_user)):
    _q = []

    # 班级ID
    if (not cid) or (cid == "0"):
        _q.append(MarkTask.class_id.in_([int(x) for x in current_user.class_id.split(",")]))
    else:
        _q = [MarkTask.class_id == int(cid)]

    if isinstance(year, str):
        _q.append(between(MarkTask.year, *[int(x) for x in year.split(",")]))
    elif isinstance(year, int):
        _q.append(MarkTask.year == year)

    # 查询
    _, db_tasks = await crud_task.find_all(
        db,
        filters=_q,
        return_fields=["name", "year", "score", "high_score", "avg_score", "low_score"])

    # 组装返回结构
    x = []
    scores = []
    high_scores = []
    avg_scores = []
    low_scores = []
    for item in db_tasks:
        x.append(f"{item.name}({item.year})")
        scores.append(item.score)
        high_scores.append(item.high_score)
        avg_scores.append(item.avg_score)
        low_scores.append(item.low_score)
    data = {
        "score": {
            "x": x,
            "y": scores
        },
        "high_score": {
            "x": x,
            "y": high_scores
        },
        "avg_score": {
            "x": x,
            "y": avg_scores
        },
        "low_scores": {
            "x": x,
            "y": low_scores
        }
    }
    return {"data": data}