"""
净资产收益率
"""
from fastapi import APIRouter, HTTPException
from pydantic import BaseModel

from Common.schemas import IndicatorDescription

router = APIRouter()

# 指标描述
ENAME = "return_on_net_assets"
CNAME = "净资产收益率"
NATURE = "定量"
CATEGORY = "盈利能力"
DESCRIPTION = "净资产收益率 = 净利润 / [(期初所有者权益合计 + 期末所有者权益合计) / 2]"

# 参数描述
PARAM1_ENAME = "net_profit"
PARAM1_CNAME = "净利润"
PARAM1_DESCR = "利润表科目，即税后利润。"

PARAM2_ENAME = "current_total_owner_equity"
PARAM2_CNAME = "所有者权益合计（期末）"
PARAM2_DESCR = "资产负债表科目，指投资人对企业净资产的所有权。"

PARAM3_ENAME = "last_total_owner_equity"
PARAM3_CNAME = "所有者权益合计（期初）"
PARAM3_DESCR = "资产负债表科目，指投资人对企业净资产的所有权。"


# 输入参数
class Parameter(BaseModel):
    net_profit: float = "净利润"
    current_total_owner_equity: float = "所有者权益合计（期末）"
    last_total_owner_equity: float = "所有者权益合计（期初）"


# 计算接口
@router.post("/{}/".format(ENAME), tags=[CATEGORY], summary=CNAME, description=DESCRIPTION)
def calculation(parameter: Parameter):
    try:
        avg_total_owner_equity = (parameter.current_total_owner_equity + parameter.last_total_owner_equity) / 2
        result = parameter.net_profit / avg_total_owner_equity
        return round(result, 6)

    except Exception:
        raise HTTPException(status_code=400, detail="Calculate Failed")


# 描述接口
@router.get("/{}/description".format(ENAME),
            response_model=IndicatorDescription,
            tags=[CATEGORY], summary=CNAME, description=DESCRIPTION)
def description():

    body = {
        "ename": ENAME,
        "cname": CNAME,
        "nature": NATURE,
        "category": CATEGORY,
        "description": DESCRIPTION,
        "parameters": [
            {"ename": PARAM1_ENAME, "cname": PARAM1_CNAME, "description": PARAM1_DESCR},
            {"ename": PARAM2_ENAME, "cname": PARAM2_CNAME, "description": PARAM2_DESCR},
            {"ename": PARAM3_ENAME, "cname": PARAM3_CNAME, "description": PARAM3_DESCR},
        ],
    }

    return body