import uuid
from datetime import datetime, timezone
from sqlalchemy import Column, String, Boolean, DateTime, Text, Integer, ForeignKey
from sqlalchemy.dialects.postgresql import UUID
from app.core.database import Base


def now_utc():
    return datetime.now(timezone.utc)


class ChassisLocationMaster(Base):
    """
    Macro Factory Locations (Chassis Inward, Unit-2, Production, FVI, PDI, Dispatch, etc.).
    Ordered sequentially via sequence_no.
    """
    __tablename__ = 'chassis_location_master'

    location_id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    location_code = Column(String(50), unique=True, nullable=False)
    location_name = Column(String(150), nullable=False)
    sequence_no = Column(Integer, nullable=False, default=0)
    description = Column(Text)
    is_active = Column(Boolean, nullable=False, default=True)
    created_at = Column(DateTime(timezone=True), default=now_utc)


class StationQaChecklistItemMaster(Base):
    """
    QA Checklist Items configured per Station.
    """
    __tablename__ = 'station_qa_checklist_item_master'

    item_id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    station_id = Column(UUID(as_uuid=True), ForeignKey('station_master.station_id'), nullable=False)
    zone_name = Column(String(150), nullable=False, default='General')  # e.g., Paint, Wiring, Underchassis
    checkpoint_text = Column(Text, nullable=False)
    specification = Column(Text)
    sequence_no = Column(Integer, nullable=False, default=0)
    is_active = Column(Boolean, nullable=False, default=True)
    created_at = Column(DateTime(timezone=True), default=now_utc)


class ChassisStationQaResult(Base):
    """
    Results of Station QA inspections per chassis scan.
    """
    __tablename__ = 'chassis_station_qa_result'

    result_id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    chassis_id = Column(UUID(as_uuid=True), ForeignKey('chassis_master.chassis_id'), nullable=False)
    station_id = Column(UUID(as_uuid=True), ForeignKey('station_master.station_id'), nullable=False)
    item_id = Column(UUID(as_uuid=True), ForeignKey('station_qa_checklist_item_master.item_id'), nullable=False)
    is_ok = Column(Boolean, nullable=False, default=True)
    remark = Column(String(255))
    inspected_by = Column(UUID(as_uuid=True), ForeignKey('login_users.user_id'), nullable=True)
    inspected_at = Column(DateTime(timezone=True), default=now_utc)