import uuid

from sqlalchemy.orm import declarative_base
from sqlalchemy import Column, Integer, SmallInteger, BigInteger, Numeric, Float, String, Boolean, DateTime
from sqlalchemy.dialects.postgresql import UUID, JSONB
from sqlalchemy.sql import text

from common.enums import DBType, UserStatus, UserRole, CompanyStatus

# 모든 ORM 모델의 베이스. insert 시 isinstance 체크에도 사용된다.
MAIN_BASE = declarative_base()


# 공통 mixin
# DB 계약(_DBTypeMixin)과 ERD 공통 컬럼(MainTableMixin)을 분리해 둔다.
def _utc_now_sql():
    return text("(now() AT TIME ZONE 'utc')")


class _DBTypeMixin:
    """모델이 자신이 속한 논리 DB 를 알려준다 (람다 실행 시 DBType 으로 세션 선택)."""

    @staticmethod
    def DBType():
        return DBType.MAIN.value


# ERD 공통 컬럼(created/updated/deleted). negodata 도메인 테이블은 단일 MAIN DB 에서 soft-delete 를 쓴다.
class MainTableMixin(_DBTypeMixin):
    created_at = Column(DateTime, nullable=False, server_default=_utc_now_sql())
    updated_at = Column(DateTime, nullable=False, server_default=_utc_now_sql(), onupdate=_utc_now_sql())
    deleted = Column(Boolean, nullable=False, server_default=text("false"), default=False)


# 스캐폴드 예시 계정 (negosium 골격 유산)
# negodata 인증은 ERD 의 users/companies 를 쓴다(아래). tbl_account 는 스캐폴드
# 테스트 호환을 위해 남겨둔다 (negodata_db 의 postgres-init 이 생성).
class tbl_account(_DBTypeMixin, MAIN_BASE):
    __tablename__ = "tbl_account"

    uid = Column(Integer, primary_key=True, autoincrement=True)
    id = Column(String(45), nullable=False, unique=True)
    pw = Column(String(255), nullable=False, default="")
    nickname = Column(String(45), nullable=False, default="")
    is_blocked = Column(Boolean, nullable=False, default=False)
    last_login_at = Column(DateTime, nullable=False, server_default=_utc_now_sql())
    create_at = Column(DateTime, server_default=_utc_now_sql())


# ERD 도메인 모델 (negosium.sql 기준, UUID PK)
class companies(MainTableMixin, MAIN_BASE):
    __tablename__ = "companies"

    company_id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    name = Column(String(100), nullable=False)
    business_number = Column(String(30), nullable=True)
    code = Column(Integer, nullable=True)  # 내부 인덱스용
    representative_name = Column(String(50), nullable=True)
    email = Column(String(255), nullable=True)
    contact_number = Column(String(20), nullable=True)
    website_url = Column(String(255), nullable=True)
    industry = Column(SmallInteger, nullable=True)  # 업종 코드 (스키마 SMALLINT)
    status = Column(SmallInteger, nullable=False, default=CompanyStatus.ACTIVE.value)  # CompanyStatus


class users(MainTableMixin, MAIN_BASE):
    __tablename__ = "users"

    user_id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    company_id = Column(UUID(as_uuid=True), nullable=False, index=True)
    id = Column(String(20), nullable=False, unique=True, index=True)  # 로그인 아이디
    password = Column(String(255), nullable=False)  # bcrypt 해시 (ERD VARCHAR(30)→255 확장)
    name = Column(String(50), nullable=True)
    email = Column(String(255), nullable=True)
    contact_number = Column(String(20), nullable=True)
    last_accessed_at = Column(DateTime, nullable=False, server_default=_utc_now_sql())
    status = Column(SmallInteger, nullable=False, default=UserStatus.ACTIVE.value)  # UserStatus
    role = Column(SmallInteger, nullable=False, default=UserRole.USER.value)  # UserRole


class items(MainTableMixin, MAIN_BASE):
    __tablename__ = "items"

    item_id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    company_id = Column(UUID(as_uuid=True), nullable=False, index=True)
    user_id = Column(UUID(as_uuid=True), nullable=False, index=True)  # 등록한 유저

    name = Column(String(100), nullable=False)
    code = Column(String(30), nullable=True)
    category = Column(String(255), nullable=True)
    category_type = Column(Integer, nullable=False, default=1)  # 카테고리 탐색용 자동 증가 숫자

    image_url = Column(String(255), nullable=True)
    model_name = Column(String(100), nullable=True)
    spec = Column(String(255), nullable=True)
    manufacturer = Column(String(50), nullable=True)
    made_in = Column(String(100), nullable=True)

    price = Column(BigInteger, nullable=True)  # 금액(원), 스키마 BIGINT
    internet_lowest_price_yn = Column(Boolean, nullable=False, default=False)  # 최저가 솔루션 원자성 보존용

    moq = Column(String(50), nullable=True)  # 최소 주문 수량
    lead_time = Column(SmallInteger, nullable=True)  # 주문 후 배송 도착까지 시간
    quantity_unit = Column(String(50), nullable=True)  # 단위 라벨(자유입력): EA/BOX/SET/ROLL ...
    delivery_type = Column(SmallInteger, nullable=True)  # 배송 유형 코드
    vat_yn = Column(Boolean, nullable=True)
    delivery_fee_yn = Column(Boolean, nullable=True)


class suppliers(MainTableMixin, MAIN_BASE):
    __tablename__ = "suppliers"

    supplier_id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    company_id = Column(UUID(as_uuid=True), nullable=False, index=True)
    user_id = Column(UUID(as_uuid=True), nullable=False, index=True)  # 등록한 유저

    name = Column(String(100), nullable=False)
    code = Column(String(20), nullable=True)
    manager_name = Column(String(50), nullable=True)
    manager_email = Column(String(255), nullable=True)
    manager_contact_number = Column(String(20), nullable=True)  # ERD 오타(manger) 교정
    priority = Column(String(10), nullable=True)  # True/False 가 아닌 string value 가능


class quotation_settings(MainTableMixin, MAIN_BASE):
    __tablename__ = "quotation_settings"

    qt_setting_id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    user_id = Column(UUID(as_uuid=True), nullable=True, index=True)  # 설정 소유 유저
    target_margin_rate = Column(Numeric(8, 6), nullable=False)
    anchoring_value = Column(Numeric(8, 6), nullable=False, default=0.01)
    card_count = Column(Integer, nullable=False, default=3)  # 한 협상 내 협상카드 사용 횟수


class quotations(MainTableMixin, MAIN_BASE):
    __tablename__ = "quotations"

    qt_id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    user_id = Column(UUID(as_uuid=True), nullable=False, index=True)
    qt_setting_id = Column(UUID(as_uuid=True), nullable=False, index=True)
    version_id = Column(UUID(as_uuid=True), nullable=False, index=True)

    name = Column(String(50), nullable=False)
    number = Column(String(30), nullable=False)
    type = Column(SmallInteger, nullable=False)  # QuotationType: 1=renego(1:1) / 2=requote(1:N)
    round = Column(Integer, nullable=False, default=1)  # 재견적 진행 시 증가
    status = Column(SmallInteger, nullable=False)  # 진행 상태 코드
    start_time = Column(DateTime, nullable=False)
    end_time = Column(DateTime, nullable=False)

    manager_name = Column(String(50), nullable=True)
    manager_email = Column(String(255), nullable=True)
    manager_contact_number = Column(String(20), nullable=True)
    memo = Column(String(100), nullable=True)

    iteration = Column(Integer, nullable=False, default=0)
    preferred_sp_yn = Column(Boolean, nullable=True)
    preferred_sp_id = Column(UUID(as_uuid=True), nullable=True)
    preferred_sp_name = Column(String(20), nullable=True)
    equal_bid_yn = Column(Boolean, nullable=True)
    equal_bid_data = Column(JSONB, nullable=True)