"""
Project model for tracking development projects.
"""

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

from .base import Base, TimestampMixin


class Project(Base, TimestampMixin):
    """
    Represents a development project tracked by Claude Code.
    
    A project is typically identified by its filesystem path and may
    correspond to a git repository.
    """
    
    __tablename__ = "projects"
    
    # Primary key
    id: Mapped[int] = mapped_column(primary_key=True)
    
    # Core project information
    name: Mapped[str] = mapped_column(String(255), nullable=False)
    path: Mapped[str] = mapped_column(Text, nullable=False, unique=True, index=True)
    git_repo: Mapped[Optional[str]] = mapped_column(String(500), nullable=True)
    languages: Mapped[Optional[List[str]]] = mapped_column(JSON, nullable=True)
    
    # Activity tracking
    last_session: Mapped[Optional[datetime]] = mapped_column(DateTime(timezone=True), nullable=True, index=True)
    total_sessions: Mapped[int] = mapped_column(Integer, default=0, nullable=False)
    total_time_minutes: Mapped[int] = mapped_column(Integer, default=0, nullable=False)
    files_modified_count: Mapped[int] = mapped_column(Integer, default=0, nullable=False)
    lines_changed_count: Mapped[int] = mapped_column(Integer, default=0, nullable=False)
    tool_calls_count: Mapped[int] = mapped_column(Integer, default=0, nullable=False)
    
    # Relationships
    sessions: Mapped[List["Session"]] = relationship(
        "Session", 
        back_populates="project",
        cascade="all, delete-orphan",
        order_by="Session.start_time.desc()"
    )
    
    def __repr__(self) -> str:
        return f"<Project(id={self.id}, name='{self.name}', path='{self.path}')>"
    
    @property
    def is_git_repo(self) -> bool:
        """Check if this project is a git repository."""
        return self.git_repo is not None and self.git_repo != ""
    
    @property
    def primary_language(self) -> Optional[str]:
        """Get the primary programming language for this project."""
        if self.languages and len(self.languages) > 0:
            return self.languages[0]
        return None
    
    def update_stats(self, session_duration_minutes: int, files_count: int, lines_count: int, tool_calls_count: int = 0) -> None:
        """Update project statistics after a session."""
        self.total_sessions += 1
        self.total_time_minutes += session_duration_minutes
        self.files_modified_count += files_count
        self.lines_changed_count += lines_count
        self.tool_calls_count += tool_calls_count
        self.last_session = func.now()