# FastApi imports
# Pydantic imports
from datetime import datetime, timedelta
from typing import List

from fastapi import APIRouter, Depends, HTTPException

# Sqlalchemy imports
from sqlalchemy.orm import Session
from starlette.responses import Response

# My imports
from config.settings import DECIMAL_PLACES
from cruds.companies import get_company_by_id
from cruds.fincas import get_finca_by_station_code, get_fincas_filter_company
from database.sqlalchemy import get_db
from routes.calculations.degrees_accumulated import monthly_avr_day_degrees
from routes.calculations.gnral_summary import general_summary
from routes.calculations.montly_precip import montly_precipitations
from routes.login import get_current_user
from schemas.tables import (
    DegreesAccumulatedAvgMonth as DegreesAccumulatedAvgMonthSchema,
)
from schemas.tables import MonthlyPrecipitations as MonthlyPrecipitationsSchema
from schemas.tables import Summary as SummarySchema
from schemas.tables import SummarySeason as SummarySeasonSchema
from schemas.users import User as UserSchema

router = APIRouter()

# Futuro Decorator
def check_daytimes_order(start_datetime, end_datetime):
    """Verifico que end_datetime sea despues que start_datetime"""
    if start_datetime > end_datetime:
        raise HTTPException(
            status_code=400,
            detail="start_datetime es mas grande que end_datetime",
        )
    """Verifico que el diff no supere una temporada (240 dias aprox)"""
    delta = end_datetime - start_datetime
    if delta.days > 240:
        raise HTTPException(
            status_code=400,
            detail="El rango de fechas pedido supera la cantidad de dias de una temporada",
        )


# Futuro Decorator
def finca_exists(db, station_code):
    """Verifico que la estacion exista"""
    if get_finca_by_station_code(db, station_code) == None:
        raise HTTPException(
            status_code=400,
            detail="ingrese un station_code valido",
        )


def has_finca_access(db, finca, user):
    if finca in get_fincas_filter_company(db, user.company_id):
        return True
    else:
        raise HTTPException(
            status_code=401,
            detail="no tienes acceso a esta finca",
        )


@router.get("/station/all/summary", response_model=List[SummarySchema])
async def get_fincas_summaries(
    start_datetime: datetime,
    end_datetime: datetime,
    db: Session = Depends(get_db),
    current_user: UserSchema = Depends(get_current_user),
) -> Response:

    check_daytimes_order(start_datetime, end_datetime)

    fincas = get_fincas_filter_company(db, current_user.company_id)
    response = []

    for finca in fincas:
        response.append(general_summary(finca, start_datetime, end_datetime))

    return response


@router.get("/station/{station_code}/summary", response_model=List[SummarySeasonSchema])
async def get_finca_summary(
    start_datetime: datetime,
    end_datetime: datetime,
    station_code: str,
    db: Session = Depends(get_db),
    current_user: UserSchema = Depends(get_current_user),
) -> Response:

    finca_exists(db, station_code)

    check_daytimes_order(start_datetime, end_datetime)

    finca = get_finca_by_station_code(db, station_code)

    has_finca_access(db, finca, current_user)

    response = []

    for i in range(5):
        new_start_date = start_datetime.replace(year=(start_datetime.year - i))
        new_end_date = end_datetime.replace(year=(end_datetime.year - i))

        summary = general_summary(finca, new_start_date, new_end_date)
        # REVIEW: Should write a new from_parent constructor
        summary_season = SummarySeasonSchema(
            station=summary.station,
            initial_date=summary.initial_date,
            final_date=summary.final_date,
            lt10=summary.lt10,
            gt30=summary.gt30,
            gt33=summary.gt33,
            grados_acumulados=summary.grados_acumulados,
            grados_acumulados_promedio=summary.grados_acumulados_promedio,
            amplitud_termica=summary.amplitud_termica,
            precip_acumulada=summary.precip_acumulada,
            data_percentage=summary.data_percentage,
        )

        if i == 0:
            summary_season.dias_igualar_temporada = 0
        else:
            this_camp_deg_acc = response[0].grados_acumulados
            this_camp_deg_acc_avg = response[0].grados_acumulados_promedio

            if (
                this_camp_deg_acc
                and this_camp_deg_acc_avg
                and summary_season.grados_acumulados
            ) is not None:
                summary_season.dias_igualar_temporada = round(
                    (summary_season.grados_acumulados - this_camp_deg_acc)
                    / this_camp_deg_acc_avg,
                    DECIMAL_PLACES,
                )

        response.append(summary_season)

    return response


@router.get(
    "/station/{station_code}/monthly-precip",
    response_model=List[MonthlyPrecipitationsSchema],
)
async def get_monthy_precipitations(
    start_datetime: datetime,
    end_datetime: datetime,
    station_code: str,
    db: Session = Depends(get_db),
    current_user: UserSchema = Depends(get_current_user),
) -> Response:

    finca_exists(db, station_code)

    check_daytimes_order(start_datetime, end_datetime)

    finca = get_finca_by_station_code(db, station_code)

    has_finca_access(db, finca, current_user)

    response = []

    for i in range(5):
        new_start_date = start_datetime.replace(year=(start_datetime.year - i))
        new_end_date = end_datetime.replace(year=(end_datetime.year - i))
        summary = montly_precipitations(finca, new_start_date, new_end_date)
        print(summary)
        if summary:
            response.append(summary)

    return response


@router.get(
    "/station/{station_code}/monthly-degrees",
    response_model=List[DegreesAccumulatedAvgMonthSchema],
)
async def get_monthly_avr_day_degrees(
    start_datetime: datetime,
    end_datetime: datetime,
    station_code: str,
    db: Session = Depends(get_db),
    current_user: UserSchema = Depends(get_current_user),
) -> Response:

    finca_exists(db, station_code)

    check_daytimes_order(start_datetime, end_datetime)

    finca = get_finca_by_station_code(db, station_code)

    has_finca_access(db, finca, current_user)

    response = []

    for i in range(5):
        new_start_date = start_datetime.replace(year=(start_datetime.year - i))
        new_end_date = end_datetime.replace(year=(end_datetime.year - i))
        summary = monthly_avr_day_degrees(finca, new_start_date, new_end_date)
        print(summary)
        if summary:
            response.append(summary)

    return response