"""
Waiting period model for tracking think time and engagement.
"""

from datetime import datetime
from typing import Optional
from sqlalchemy import String, Text, Integer, DateTime, ForeignKey
from sqlalchemy.orm import Mapped, mapped_column, relationship
from sqlalchemy.sql import func

from .base import Base, TimestampMixin


class WaitingPeriod(Base, TimestampMixin):
    """
    Represents a period when Claude is waiting for user input.
    
    These periods provide insight into user thinking time, engagement patterns,
    and workflow interruptions during development sessions.
    """
    
    __tablename__ = "waiting_periods"
    
    # Primary key
    id: Mapped[int] = mapped_column(primary_key=True)
    
    # Foreign key to session
    session_id: Mapped[int] = mapped_column(ForeignKey("sessions.id"), nullable=False, index=True)
    
    # Timing
    start_time: Mapped[datetime] = mapped_column(
        DateTime(timezone=True),
        nullable=False,
        default=func.now(),
        index=True
    )
    end_time: Mapped[Optional[datetime]] = mapped_column(DateTime(timezone=True), nullable=True)
    duration_seconds: Mapped[Optional[int]] = mapped_column(Integer, nullable=True, index=True)
    
    # Context
    context_before: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
    context_after: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
    
    # Activity inference
    likely_activity: Mapped[Optional[str]] = mapped_column(String(50), nullable=True)  # thinking, research, external_work, break
    
    # Relationships
    session: Mapped["Session"] = relationship("Session", back_populates="waiting_periods")
    
    def __repr__(self) -> str:
        duration_info = f", duration={self.duration_seconds}s" if self.duration_seconds else ""
        return f"<WaitingPeriod(id={self.id}, session_id={self.session_id}{duration_info})>"
    
    @property
    def is_active(self) -> bool:
        """Check if this waiting period is still active (not ended)."""
        return self.end_time is None
    
    @property
    def calculated_duration_seconds(self) -> Optional[int]:
        """Calculate waiting period duration in seconds."""
        if self.end_time is None:
            # Still waiting, calculate current duration
            current_duration = datetime.utcnow() - self.start_time
            return int(current_duration.total_seconds())
        else:
            # Finished waiting
            if self.duration_seconds is not None:
                return self.duration_seconds
            else:
                duration = self.end_time - self.start_time
                return int(duration.total_seconds())
    
    @property
    def duration_minutes(self) -> Optional[float]:
        """Get duration in minutes."""
        seconds = self.calculated_duration_seconds
        return seconds / 60 if seconds is not None else None
    
    def end_waiting(self, context_after: Optional[str] = None) -> None:
        """End the waiting period and calculate duration."""
        if self.end_time is None:
            self.end_time = func.now()
            self.duration_seconds = self.calculated_duration_seconds
            if context_after:
                self.context_after = context_after
    
    def classify_activity(self) -> str:
        """
        Classify the likely activity based on duration and context.
        
        Returns one of: 'thinking', 'research', 'external_work', 'break'
        """
        if self.likely_activity:
            return self.likely_activity
            
        duration = self.calculated_duration_seconds
        if duration is None:
            return "unknown"
        
        # Classification based on duration
        if duration < 10:
            return "thinking"  # Quick pause
        elif duration < 60:
            return "thinking"  # Short contemplation
        elif duration < 300:  # 5 minutes
            return "research"  # Looking something up
        elif duration < 1800:  # 30 minutes
            return "external_work"  # Working on something else
        else:
            return "break"  # Extended break
    
    @property
    def engagement_score(self) -> float:
        """
        Calculate an engagement score based on waiting time.
        
        Returns a score from 0.0 (disengaged) to 1.0 (highly engaged).
        """
        duration = self.calculated_duration_seconds
        if duration is None:
            return 0.5  # Default neutral score
        
        # Short waits indicate high engagement
        if duration <= 5:
            return 1.0
        elif duration <= 30:
            return 0.9
        elif duration <= 120:  # 2 minutes
            return 0.7
        elif duration <= 300:  # 5 minutes
            return 0.5
        elif duration <= 900:  # 15 minutes
            return 0.3
        else:
            return 0.1  # Long waits indicate low engagement
    
    def is_quick_response(self) -> bool:
        """Check if user responded quickly (< 30 seconds)."""
        duration = self.calculated_duration_seconds
        return duration is not None and duration < 30
    
    def is_thoughtful_pause(self) -> bool:
        """Check if this was a thoughtful pause (30s - 2 minutes)."""
        duration = self.calculated_duration_seconds
        return duration is not None and 30 <= duration < 120
    
    def is_research_break(self) -> bool:
        """Check if this was likely a research break (2 - 15 minutes)."""
        duration = self.calculated_duration_seconds
        return duration is not None and 120 <= duration < 900
    
    def is_extended_break(self) -> bool:
        """Check if this was an extended break (> 15 minutes)."""
        duration = self.calculated_duration_seconds
        return duration is not None and duration >= 900