from abc import ABC, abstractmethod
from datetime import datetime
from typing import Optional, Tuple

from sqlalchemy import select, func, and_, update
from sqlalchemy.ext.asyncio import AsyncSession

from common.database.db_session_manager import DB_SESSION_MNG
from common.database.model.models import quotations
from common.enums import ErrorType
from common.logger import LOG
from common.utils.gtime import GTime


# 견적 CRUD. quotations 테이블에는 company_id 가 없어 회사 스코프는 하지 않는다(토큰 검증만).
# user_id 는 생성 시 소유자로 기록만 한다.
class IQuotationCRUD(ABC):
    @abstractmethod
    async def search(
        self, cdb: AsyncSession, status, type_, start_from, start_to, skip, limit
    ) -> Tuple[ErrorType, list, int]:
        pass

    @abstractmethod
    async def get_by_id(self, cdb: AsyncSession, qt_id) -> Tuple[ErrorType, quotations]:
        pass

    @abstractmethod
    async def add_quotation(self, cdb: AsyncSession, quotation: quotations) -> ErrorType:
        pass

    @abstractmethod
    async def update_quotation(self, cdb: AsyncSession, qt_id, data: dict) -> ErrorType:
        pass

    @abstractmethod
    async def soft_delete(self, cdb: AsyncSession, qt_id) -> ErrorType:
        pass


class QuotationCRUD(IQuotationCRUD):
    async def search(
        self,
        cdb: AsyncSession,
        status: Optional[str],
        type_: Optional[str],
        start_from: Optional[datetime],
        start_to: Optional[datetime],
        skip: int,
        limit: int,
    ) -> Tuple[ErrorType, list, int]:
        try:
            conditions = [quotations.deleted == False]  # noqa: E712
            if status:
                conditions.append(quotations.status == status)
            if type_:
                conditions.append(quotations.type == type_)
            if start_from:
                conditions.append(quotations.start_time >= start_from)
            if start_to:
                conditions.append(quotations.start_time <= start_to)
            where = and_(*conditions)

            cnt_err, cnt_rows = await DB_SESSION_MNG.execute(cdb, select(func.count()).select_from(quotations).where(where))
            if cnt_err != ErrorType.SUCCESS:
                return cnt_err, [], 0
            total = int(cnt_rows[0] or 0) if cnt_rows else 0

            list_err, rows = await DB_SESSION_MNG.execute(
                cdb,
                select(quotations).where(where).order_by(quotations.created_at.desc()).offset(skip).limit(limit),
            )
            if list_err != ErrorType.SUCCESS:
                return list_err, [], 0
            return ErrorType.SUCCESS, list(rows), total
        except Exception as ex:
            LOG.e_no_callstack(ex)
            return ErrorType.DB_RUN_FAILED, [], 0

    async def get_by_id(self, cdb: AsyncSession, qt_id) -> Tuple[ErrorType, quotations]:
        try:
            query = select(quotations).where(quotations.qt_id == qt_id, quotations.deleted == False).limit(1)  # noqa: E712
            err_type, row_list = await DB_SESSION_MNG.execute(cdb, query)
            if err_type != ErrorType.SUCCESS:
                return err_type, None
            if len(row_list) != 1:
                return ErrorType.DB_INVALID_KEY, None
            return ErrorType.SUCCESS, row_list[0]
        except Exception as ex:
            LOG.e_no_callstack(ex)
            return ErrorType.DB_RUN_FAILED, None

    async def add_quotation(self, cdb: AsyncSession, quotation: quotations) -> ErrorType:
        try:
            return await DB_SESSION_MNG.insert(cdb, quotation)
        except Exception as ex:
            LOG.e_no_callstack(ex)
            return ErrorType.DB_RUN_FAILED

    async def update_quotation(self, cdb: AsyncSession, qt_id, data: dict) -> ErrorType:
        try:
            if not data:
                return ErrorType.SUCCESS
            query = update(quotations).where(quotations.qt_id == qt_id).values(**data)
            return await DB_SESSION_MNG.add(cdb, query)
        except Exception as ex:
            LOG.e_no_callstack(ex)
            return ErrorType.DB_RUN_FAILED

    async def soft_delete(self, cdb: AsyncSession, qt_id) -> ErrorType:
        try:
            query = update(quotations).where(quotations.qt_id == qt_id).values(deleted=True, updated_at=GTime.UTC())
            return await DB_SESSION_MNG.add(cdb, query)
        except Exception as ex:
            LOG.e_no_callstack(ex)
            return ErrorType.DB_RUN_FAILED