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

from typing import Union

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

from crud.mark import crud_mark
from models.user import Teacher
from utils.depends import get_async_db, get_current_user


async def analysis_line_chart(
        cid: int = 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)):
    if year and year.isdigit():
        filters = {"class_id": cid, "year": year}
    else:
        filters = [
            text(f"class_id = {cid}"
                 if year is None else f"class_id = {cid} AND year IN ({year})")
        ]

    # 查询
    _, db_tasks = await crud_mark.find_all(db,
                                           filters=filters,
                                           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}