"""
Photo model definition
"""
from sqlalchemy import Column, String, Integer, Boolean, DateTime, ForeignKey, Text, Index
from sqlalchemy.sql import func
from datetime import datetime
import uuid

from app.database import Base

class Photo(Base):
    __tablename__ = 'photos'
    
    # Primary key
    id = Column(String, primary_key=True, default=lambda: str(uuid.uuid4()))
    
    # File information
    filepath = Column(String, unique=True, nullable=False)
    filename = Column(String, nullable=False)
    folder_id = Column(String, ForeignKey('folders.id'))
    file_hash = Column(String, index=True)  # SHA-256 hash for duplicate detection
    
    # Media information
    media_type = Column(String, nullable=False)  # 'photo' | 'video' | 'raw' | 'heic'
    original_format = Column(String)  # 'CR3', 'NEF', 'HEIC', 'MP4', 'JPEG', etc.
    width = Column(Integer)
    height = Column(Integer)
    file_size = Column(Integer)
    
    # Timestamps
    taken_at = Column(DateTime)  # from EXIF DateTimeOriginal, fallback to file mtime
    taken_at_source = Column(String)  # 'exif' | 'filesystem' | 'manual'
    added_at = Column(DateTime, server_default=func.now())
    updated_at = Column(DateTime, onupdate=func.now())
    
    # Trash status
    is_trashed = Column(Boolean, default=False)
    trashed_at = Column(DateTime)
    
    # Thumbnail paths
    thumb_small = Column(String)  # path to 240px thumb
    thumb_medium = Column(String)  # path to 640px thumb
    thumb_large = Column(String)  # path to 1280px thumb
    
    # Processing status
    processing_status = Column(String, default='pending')  # 'pending' | 'processing' | 'completed' | 'failed'
    processing_error = Column(Text)
    
    # Metadata
    exif_json = Column(Text)  # full EXIF/XMP blob as JSON
    
    # User-editable fields
    user_title = Column(String)
    user_notes = Column(Text)
    rating = Column(Integer, default=0)  # 0-5 stars
    color_label = Column(String)  # 'red'|'orange'|'yellow'|'green'|'blue'|'purple'|NULL
    is_picked = Column(Boolean, default=False)
    # Note: is_rejected was merged into is_trashed (a single soft "trashed"
    # concept). The DB column may still exist on legacy installs but is no
    # longer read or written.
    
    # Duplicate detection
    is_duplicate = Column(Boolean, default=False)
    
    # Live photo support
    live_photo_video_id = Column(String, ForeignKey('photos.id'))
    
    # Indexes for performance
    __table_args__ = (
        Index('ix_photos_taken_at', 'taken_at'),
        Index('ix_photos_folder_id', 'folder_id'),
        Index('ix_photos_is_trashed', 'is_trashed'),
        Index('ix_photos_rating', 'rating'),
        Index('ix_photos_color_label', 'color_label'),
        Index('ix_photos_media_type', 'media_type'),
        Index('ix_photos_processing_status', 'processing_status'),
    )