from sqlalchemy import Column, Integer, String, Text, Enum, Date, ForeignKey, Boolean
from sqlalchemy.orm import relationship
from app.db.base import Base, TimestampMixin
import enum


class TaskPriority(str, enum.Enum):
    dusuk = "dusuk"
    orta = "orta"
    yuksek = "yuksek"
    kritik = "kritik"


class TaskStatus(str, enum.Enum):
    bekliyor = "bekliyor"
    devam_ediyor = "devam_ediyor"
    tamamlandi = "tamamlandi"
    iptal = "iptal"


class Task(Base, TimestampMixin):
    __tablename__ = "tasks"

    id = Column(Integer, primary_key=True, index=True)
    user_id = Column(Integer, ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True)
    project_id = Column(Integer, ForeignKey("projects.id", ondelete="SET NULL"), nullable=True, index=True)

    title = Column(String(255), nullable=False)
    description = Column(Text, nullable=True)
    priority = Column(Enum(TaskPriority), default=TaskPriority.orta, nullable=False)
    status = Column(Enum(TaskStatus), default=TaskStatus.bekliyor, nullable=False, index=True)
    due_date = Column(Date, nullable=True)
    category = Column(String(100), nullable=True)
    position = Column(Integer, default=0, nullable=False)  # Kanban sıralama için
    is_deleted = Column(Boolean, default=False, nullable=False)  # Soft delete

    # İlişkiler
    user = relationship("User", back_populates="tasks")
    project = relationship("Project", back_populates="tasks")
    calendar_events = relationship("CalendarEvent", back_populates="task")

    def __repr__(self):
        return f"<Task id={self.id} title={self.title[:30]} status={self.status}>"