Medios-Macina/models.py

"""Data models for the pipeline."""

import datetime
import hashlib
import json
import math
import os
import shutil
import sys
from dataclasses import dataclass, field
from pathlib import Path
from typing import Any, Callable, Dict, List, Optional, Protocol, TextIO, Tuple


@dataclass(slots=True)
class PipeObject:
    """Unified pipeline object for tracking files, metadata, tag values, and relationships through the pipeline.
    
    This is the single source of truth for all result data in the pipeline. Uses the hash+store
    canonical pattern for file identification.
    
    Attributes:
        hash: SHA-256 hash of the file (canonical identifier)
        store: Storage backend name (e.g., 'default', 'hydrus', 'test', 'home')
        tag: List of extracted or assigned tag values
        title: Human-readable title if applicable
        source_url: URL where the object came from
        duration: Duration in seconds if applicable
        metadata: Full metadata dictionary from source
        warnings: Any warnings or issues encountered
        path: Path to the file if this object represents a file
        relationships: Relationship data (king/alt/related hashes)
        is_temp: If True, this is a temporary/intermediate artifact that may be cleaned up
        action: The cmdlet that created this object (format: 'cmdlet:cmdlet_name')
        parent_hash: Hash of the parent file in the pipeline chain (for tracking provenance/lineage)
        extra: Additional fields not covered above
    """
    hash: str
    store: str
    tag: List[str] = field(default_factory=list)
    title: Optional[str] = None
    url: Optional[str] = None
    source_url: Optional[str] = None
    duration: Optional[float] = None
    metadata: Dict[str, Any] = field(default_factory=dict)
    warnings: List[str] = field(default_factory=list)
    path: Optional[str] = None
    relationships: Dict[str, Any] = field(default_factory=dict)
    is_temp: bool = False
    action: Optional[str] = None
    parent_hash: Optional[str] = None
    extra: Dict[str, Any] = field(default_factory=dict)

    def add_relationship(self, rel_type: str, rel_hash: str) -> None:
        """Add a relationship hash.
        
        Args:
            rel_type: Relationship type ('king', 'alt', 'related')
            rel_hash: Hash to add to the relationship
        """
        if rel_type not in self.relationships:
            self.relationships[rel_type] = []
        
        if isinstance(self.relationships[rel_type], list):
            if rel_hash not in self.relationships[rel_type]:
                self.relationships[rel_type].append(rel_hash)
        else:
            # Single value (e.g., king), convert to that value
            self.relationships[rel_type] = rel_hash
    
    def get_relationships(self) -> Dict[str, Any]:
        """Get all relationships for this object."""
        return self.relationships.copy() if self.relationships else {}

    def debug_table(self) -> None:
        """Print a formatted debug table showing PipeObject state.
        
        Only prints when debug logging is enabled. Useful for tracking
        object state throughout the pipeline.
        """
        try:
            from SYS.logger import is_debug_enabled, debug
            import shutil
            
            if not is_debug_enabled():
                return
        except Exception:
            return
        
        # Prepare display values
        hash_display = str(self.hash or "N/A")
        store_display = str(self.store or "N/A")
        title_display = str(self.title or "N/A")
        tag_display = ", ".join(self.tag[:3]) if self.tag else "[]"
        if len(self.tag) > 3:
            tag_display += f" (+{len(self.tag) - 3} more)"
        file_path_display = str(self.path or "N/A")

        url_display: Any = self.url or "N/A"
        if isinstance(url_display, (list, tuple, set)):
            parts = [str(x) for x in url_display if x]
            url_display = ", ".join(parts) if parts else "N/A"
        else:
            url_display = str(url_display)
        
        relationships_display = "N/A"
        if self.relationships:
            rel_parts = []
            for key, val in self.relationships.items():
                if isinstance(val, list):
                    rel_parts.append(f"{key}({len(val)})")
                else:
                    rel_parts.append(key)
            relationships_display = ", ".join(rel_parts)
        
        warnings_display = f"{len(self.warnings)} warning(s)" if self.warnings else "none"

        def _fit(text: str, max_len: int) -> str:
            if max_len <= 0:
                return ""
            if len(text) <= max_len:
                return text
            if max_len <= 3:
                return text[:max_len]
            return text[: max_len - 3] + "..."

        # Compute box width from terminal size, but never allow overflow.
        try:
            term_cols = int(getattr(shutil.get_terminal_size((120, 20)), "columns", 120))
        except Exception:
            term_cols = 120
        box_inner_max = max(60, term_cols - 3)  # line length = box_inner + 3

        rows = [
            ("Hash", hash_display),
            ("Store", store_display),
            ("Title", title_display),
            ("Tag", tag_display),
            ("URL", str(url_display)),
            ("File Path", file_path_display),
            ("Relationships", relationships_display),
            ("Warnings", warnings_display),
        ]
        label_width = max(len(k) for k, _ in rows)

        # Estimate a good inner width from current content, capped to terminal.
        base_contents = [f"{k:<{label_width}} : {v}" for k, v in rows]
        desired_inner = max([len("PipeObject Debug Info"), *[len(x) for x in base_contents], 60])
        box_inner = min(desired_inner, box_inner_max)

        def _line(content: str) -> str:
            return f"│ {_fit(content, box_inner):<{box_inner}}│"

        # Print table
        debug("┌" + ("─" * (box_inner + 1)) + "┐")
        debug(_line("PipeObject Debug Info"))
        debug("├" + ("─" * (box_inner + 1)) + "┤")
        for key, val in rows:
            content = f"{key:<{label_width}} : {val}"
            debug(_line(content))
        
        # Show extra keys as individual rows
        if self.extra:
            debug("├" + ("─" * (box_inner + 1)) + "┤")
            debug(_line("Extra Fields:"))
            for key, val in self.extra.items():
                # Format value for display
                if isinstance(val, (list, set)):
                    val_display = f"{type(val).__name__}({len(val)})"
                elif isinstance(val, dict):
                    val_display = f"dict({len(val)})"
                elif isinstance(val, (int, float)):
                    val_display = str(val)
                else:
                    val_str = str(val)
                    val_display = val_str if len(val_str) <= 40 else val_str[:37] + "..."
                
                # Truncate key if needed
                key_display = str(key)
                key_display = key_display if len(key_display) <= 15 else key_display[:12] + "..."
                content = f"  {key_display:<15}: {val_display}"
                debug(_line(content))

            # If we have structured provider metadata, expand it for debugging.
            full_md = self.extra.get("full_metadata")
            if isinstance(full_md, dict) and full_md:
                debug("├" + ("─" * (box_inner + 1)) + "┤")
                debug(_line("full_metadata:"))
                for md_key in sorted(full_md.keys(), key=lambda x: str(x)):
                    md_val = full_md.get(md_key)
                    if isinstance(md_val, (str, int, float)) or md_val is None or isinstance(md_val, bool):
                        md_display = str(md_val)
                    elif isinstance(md_val, list):
                        if len(md_val) <= 6 and all(isinstance(x, (str, int, float, bool)) or x is None for x in md_val):
                            md_display = "[" + ", ".join(str(x) for x in md_val) + "]"
                        else:
                            md_display = f"list({len(md_val)})"
                    elif isinstance(md_val, dict):
                        # Avoid dumping huge nested dicts (like raw provider docs).
                        keys = list(md_val.keys())
                        preview = ",".join(str(k) for k in keys[:6])
                        md_display = f"dict({len(keys)})[{preview}{',...' if len(keys) > 6 else ''}]"
                    else:
                        md_str = str(md_val)
                        md_display = md_str if len(md_str) <= 40 else md_str[:37] + "..."

                    md_key_display = str(md_key)
                    md_key_display = md_key_display if len(md_key_display) <= 15 else md_key_display[:12] + "..."
                    content = f"  {md_key_display:<15}: {md_display}"
                    debug(_line(content))
        
        if self.action:
            debug("├─────────────────────────────────────────────────────────────┤")
            action_display = self.action[:48]
            debug(f"│ Action      : {action_display:<48}│")
        if self.parent_hash:
            if not self.action:
                debug("├─────────────────────────────────────────────────────────────┤")
            parent_display = self.parent_hash[:12] + "..." if len(self.parent_hash) > 12 else self.parent_hash
            debug(f"│ Parent Hash : {parent_display:<48}│")
        debug("└─────────────────────────────────────────────────────────────┘")

    def to_dict(self) -> Dict[str, Any]:
        """Serialize to dictionary, excluding None and empty values."""
        data: Dict[str, Any] = {
            "hash": self.hash,
            "store": self.store,
        }
        
        if self.tag:
            data["tag"] = self.tag
        if self.title:
            data["title"] = self.title
        if self.url:
            data["url"] = self.url
        if self.source_url:
            data["source_url"] = self.source_url
        if self.duration is not None:
            data["duration"] = self.duration
        if self.metadata:
            data["metadata"] = self.metadata
        if self.warnings:
            data["warnings"] = self.warnings
        if self.path:
            data["path"] = self.path
        if self.relationships:
            data["relationships"] = self.relationships
        if self.is_temp:
            data["is_temp"] = self.is_temp
        if self.action:
            data["action"] = self.action
        if self.parent_hash:
            data["parent_hash"] = self.parent_hash
        
        # Add extra fields
        data.update({k: v for k, v in self.extra.items() if v is not None})
        return data


class FileRelationshipTracker:
    """Track relationships between files for sidecar creation.
    
    Allows tagging files with their relationships to other files:
    - king: The primary/master version of a file
    - alt: Alternate versions of the same content
    - related: Related files (e.g., screenshots of a book)
    """
    
    def __init__(self) -> None:
        self.relationships: Dict[str, Dict[str, Any]] = {}
    
    def register_king(self, file_path: str, file_hash: str) -> None:
        """Register a file as the king (primary) version."""
        if file_path not in self.relationships:
            self.relationships[file_path] = {}
        self.relationships[file_path]["king"] = file_hash
    
    def add_alt(self, file_path: str, alt_hash: str) -> None:
        """Add an alternate version of a file."""
        if file_path not in self.relationships:
            self.relationships[file_path] = {}
        if "alt" not in self.relationships[file_path]:
            self.relationships[file_path]["alt"] = []
        if alt_hash not in self.relationships[file_path]["alt"]:
            self.relationships[file_path]["alt"].append(alt_hash)
    
    def add_related(self, file_path: str, related_hash: str) -> None:
        """Add a related file."""
        if file_path not in self.relationships:
            self.relationships[file_path] = {}
        if "related" not in self.relationships[file_path]:
            self.relationships[file_path]["related"] = []
        if related_hash not in self.relationships[file_path]["related"]:
            self.relationships[file_path]["related"].append(related_hash)
    
    def get_relationships(self, file_path: str) -> Optional[Dict[str, Any]]:
        """Get relationships for a file."""
        return self.relationships.get(file_path)
    
    def link_files(self, primary_path: str, king_hash: str, *alt_paths: str) -> None:
        """Link files together with primary as king and others as alternates.
        
        Args:
            primary_path: Path to the primary file (will be marked as 'king')
            king_hash: Hash of the primary file
            alt_paths: Paths to alternate versions (will be marked as 'alt')
        """
        self.register_king(primary_path, king_hash)
        for alt_path in alt_paths:
            try:
                alt_hash = _get_file_hash(alt_path)
                self.add_alt(primary_path, alt_hash)
            except Exception as e:
                import sys
                print(f"Error hashing {alt_path}: {e}", file=sys.stderr)


def _get_file_hash(filepath: str) -> str:
    """Calculate SHA256 hash of a file."""
    sha256_hash = hashlib.sha256()
    with open(filepath, "rb") as f:
        for byte_block in iter(lambda: f.read(4096), b""):
            sha256_hash.update(byte_block)
    return sha256_hash.hexdigest()


# ============= Download Module Classes =============

class DownloadError(RuntimeError):
    """Raised when the download or Hydrus import fails."""


@dataclass(slots=True)
class DownloadOptions:
    """Configuration for downloading media.
    
    Use the add-file cmdlet separately for Hydrus import.
    """
    url: str
    mode: str  # "audio" or "video"
    output_dir: Path
    cookies_path: Optional[Path] = None
    ytdl_format: Optional[str] = None
    extra_tags: Optional[List[str]] = None
    debug_log: Optional[Path] = None
    native_progress: bool = False
    clip_sections: Optional[str] = None
    playlist_items: Optional[str] = None  # yt-dlp --playlist-items format (e.g., "1-3,5,8")
    no_playlist: bool = False  # If True, pass --no-playlist to yt-dlp
    quiet: bool = False  # If True, suppress all console output (progress, debug logs)
    embed_chapters: bool = False  # If True, pass yt-dlp --embed-chapters / embedchapters
    write_sub: bool = False  # If True, download subtitles (writesubtitles/writeautomaticsub)


class SendFunc(Protocol):
    """Protocol for event sender function."""
    def __call__(self, event: str, **payload: Any) -> None:
        ...


@dataclass(slots=True)
class DownloadMediaResult:
    """Result of a successful media download."""
    path: Path
    info: Dict[str, Any]
    tag: List[str]
    source_url: Optional[str]
    hash_value: Optional[str] = None
    paths: Optional[List[Path]] = None  # For multiple files (e.g., section downloads)


@dataclass(slots=True)
class DebugLogger:
    """Logs events to a JSON debug file for troubleshooting downloads."""
    path: Path
    file: Optional[TextIO] = None
    session_started: bool = False

    def ensure_open(self) -> None:
        """Open the debug log file if not already open."""
        if self.file is not None:
            return
        try:
            parent = self.path.parent
            if parent and not parent.exists():
                parent.mkdir(parents=True, exist_ok=True)
            self.file = self.path.open("a", encoding="utf-8")
        except OSError as exc:  # pragma: no cover - surfaces to stderr
            print(f"Failed to open debug log {self.path}: {exc}", file=sys.stderr)
            self.file = None
            return
        self._write_session_header()

    def _write_session_header(self) -> None:
        """Write session start marker to log."""
        if self.session_started:
            return
        self.session_started = True
        self.write_record("session-start", {"pid": os.getpid(), "exe": sys.executable})

    def write_raw(self, text: str) -> None:
        """Write raw text to debug log."""
        self.ensure_open()
        if self.file is None:
            return
        self.file.write(text + "\n")
        self.file.flush()

    def write_record(self, event: str, payload: Optional[Dict[str, Any]] = None) -> None:
        """Write a structured event record to debug log."""
        record = {
            "timestamp": datetime.datetime.utcnow().isoformat(timespec="seconds") + "Z",
            "event": event,
            "payload": payload,
        }
        self.write_raw(json.dumps(_sanitise_for_json(record), ensure_ascii=False))

    def close(self) -> None:
        """Close the debug log file."""
        if self.file is None:
            return
        try:
            self.file.close()
        finally:
            self.file = None


def _sanitise_for_json(value: Any, *, max_depth: int = 8, _seen: Optional[set[int]] = None) -> Any:
    """Best-effort conversion to JSON-serialisable types without raising on cycles."""
    import math
    from dataclasses import asdict, is_dataclass

    if value is None or isinstance(value, (str, bool)):
        return value
    if isinstance(value, (int, float)):
        if isinstance(value, float) and not math.isfinite(value):
            return repr(value)
        return value
    if isinstance(value, Path):
        return str(value)
    if isinstance(value, bytes):
        try:
            return value.decode()
        except Exception:
            return value.hex()

    if max_depth <= 0:
        return repr(value)

    if _seen is None:
        _seen = set()

    obj_id = id(value)
    if obj_id in _seen:
        return "<circular>"

    _seen.add(obj_id)
    try:
        if isinstance(value, dict):
            return {
                str(key): _sanitise_for_json(val, max_depth=max_depth - 1, _seen=_seen)
                for key, val in value.items()
            }
        if isinstance(value, (list, tuple, set)):
            iterable = value if not isinstance(value, set) else list(value)
            return [
                _sanitise_for_json(item, max_depth=max_depth - 1, _seen=_seen)
                for item in iterable
            ]
        if is_dataclass(value) and not isinstance(value, type):
            return _sanitise_for_json(asdict(value), max_depth=max_depth - 1, _seen=_seen)
    finally:
        _seen.discard(obj_id)

    return repr(value)

class ProgressBar:
    """Formats download progress with visual bar, speed, ETA, and file size."""

    def __init__(self, width: Optional[int] = None):
        """Initialize progress bar with optional custom width.
        
        Args:
            width: Terminal width, defaults to auto-detect.
        """
        if width is None:
            width = shutil.get_terminal_size((80, 20))[0]
        self.width = max(40, width)  # Minimum 40 chars for readability

    def format_bytes(self, bytes_val: Optional[float]) -> str:
        """Format bytes to human-readable size.
        
        Args:
            bytes_val: Number of bytes or None.
            
        Returns:
            Formatted string (e.g., "123.4 MB", "1.2 GB").
        """
        if bytes_val is None or bytes_val <= 0:
            return "?.? B"
        
        for unit in ("B", "KB", "MB", "GB", "TB"):
            if bytes_val < 1024:
                return f"{bytes_val:.1f} {unit}"
            bytes_val /= 1024
        
        return f"{bytes_val:.1f} PB"

    def format_speed(self, speed_str: Optional[str]) -> str:
        """Format download speed.
        
        Args:
            speed_str: Speed string from yt-dlp (e.g., "1.23MiB/s").
            
        Returns:
            Formatted speed string or "?.? KB/s".
        """
        if not speed_str or speed_str.strip() == "":
            return "?.? KB/s"
        return speed_str.strip()

    def format_eta(self, eta_str: Optional[str]) -> str:
        """Format estimated time remaining.
        
        Args:
            eta_str: ETA string from yt-dlp (e.g., "00:12:34").
            
        Returns:
            Formatted ETA string or "?:?:?".
        """
        if not eta_str or eta_str.strip() == "":
            return "?:?:?"
        return eta_str.strip()

    def format_percent(self, percent_str: Optional[str]) -> float:
        """Extract percent as float.
        
        Args:
            percent_str: Percent string from yt-dlp (e.g., "45.2%").
            
        Returns:
            Float 0-100 or 0 if invalid.
        """
        if not percent_str:
            return 0.0
        try:
            return float(percent_str.replace("%", "").strip())
        except ValueError:
            return 0.0

    def build_bar(self, percent: float, width: int = 30) -> str:
        """Build ASCII progress bar.
        
        Args:
            percent: Completion percentage (0-100).
            width: Bar width in characters.
            
        Returns:
            Progress bar string (e.g., "[████████░░░░░░░░░░░░░░░░░░]").
        """
        percent = max(0, min(100, percent))  # Clamp to 0-100
        filled = int(percent * width / 100)
        empty = width - filled
        
        # Use box-drawing characters for nice appearance
        bar = "█" * filled + "░" * empty
        return f"[{bar}]"

    def format_progress(
        self,
        percent_str: Optional[str] = None,
        downloaded: Optional[int] = None,
        total: Optional[int] = None,
        speed_str: Optional[str] = None,
        eta_str: Optional[str] = None,
    ) -> str:
        """Format complete progress line.
        
        Args:
            percent_str: Percent string (e.g., "45.2%").
            downloaded: Downloaded bytes.
            total: Total bytes.
            speed_str: Speed string (e.g., "1.23MiB/s").
            eta_str: ETA string (e.g., "00:12:34").
            
        Returns:
            Formatted progress string.
        """
        percent = self.format_percent(percent_str)
        # Some callers (e.g. yt-dlp hooks) may not provide a stable percent string.
        # When we have byte counts, derive percent from them so the bar advances.
        if (not percent_str or percent == 0.0) and downloaded is not None and total is not None and total > 0:
            try:
                percent = (float(downloaded) / float(total)) * 100.0
            except Exception:
                percent = percent
        bar = self.build_bar(percent)
        
        # Format sizes
        if downloaded is not None and total is not None and total > 0:
            size_str = f"{self.format_bytes(downloaded)} / {self.format_bytes(total)}"
        elif total is not None and total > 0:
            size_str = f"/ {self.format_bytes(total)}"
        elif downloaded is not None and downloaded > 0:
            size_str = f"{self.format_bytes(downloaded)} downloaded"
        else:
            size_str = ""
        
        speed = self.format_speed(speed_str)
        eta = self.format_eta(eta_str)
        
        # Build complete line
        # Format: [████░░░░] 45.2% | 125.5 MB / 278.3 MB | 1.23 MB/s | ETA 00:12:34
        parts = [
            bar,
            f"{percent:5.1f}%",
        ]
        
        if size_str:
            parts.append(f"| {size_str}")
        
        parts.append(f"| {speed}")
        parts.append(f"| ETA {eta}")
        
        return "  ".join(parts)

    def format_summary(
        self,
        total: Optional[int] = None,
        speed_str: Optional[str] = None,
        elapsed_str: Optional[str] = None,
    ) -> str:
        """Format completion summary.
        
        Args:
            total: Total bytes downloaded.
            speed_str: Average speed.
            elapsed_str: Total time elapsed.
            
        Returns:
            Summary string.
        """
        parts = ["✓ Download complete"]
        
        if total is not None and total > 0:
            parts.append(f"| {self.format_bytes(total)}")
        
        if speed_str:
            parts.append(f"| {speed_str.strip()}")
        
        if elapsed_str:
            parts.append(f"| {elapsed_str.strip()}")
        
        return "  ".join(parts)


# ============================================================================
# PIPELINE EXECUTION CONTEXT
# Consolidated from pipeline_context.py
# ============================================================================
# Note: Pipeline functions and state variables moved to pipeline.py

class PipelineStageContext:
	"""Context information for the current pipeline stage."""
	
	def __init__(self, stage_index: int, total_stages: int, worker_id: Optional[str] = None):
		self.stage_index = stage_index
		self.total_stages = total_stages
		self.is_last_stage = (stage_index == total_stages - 1)
		self.worker_id = worker_id
		self.emits: List[Any] = []
	
	def emit(self, obj: Any) -> None:
		"""Emit an object to the next pipeline stage."""
		self.emits.append(obj)
	
	def get_current_command_text(self) -> str:
		"""Get the current command text (for backward compatibility)."""
		# This is maintained for backward compatibility with old code
		# In a real implementation, this would come from the stage context
		return ""
	
	def __repr__(self) -> str:
		return f"PipelineStageContext(stage={self.stage_index}/{self.total_stages}, is_last={self.is_last_stage}, worker_id={self.worker_id})"


# ============================================================================
# RESULT TABLE CLASSES
# Consolidated from result_table.py
# ============================================================================

@dataclass
class InputOption:
    """Represents an interactive input option (cmdlet argument) in a table.
    
    Allows users to select options that translate to cmdlet arguments,
    enabling interactive configuration right from the result table.
    
    Example:
        # Create an option for location selection
        location_opt = InputOption(
            "location",
            type="enum",
            choices=["local", "hydrus", "0x0"],
            description="Download destination"
        )
        
        # Use in result table
        table.add_input_option(location_opt)
        selected = table.select_option("location")  # Returns user choice
    """
    name: str
    """Option name (maps to cmdlet argument)"""
    type: str = "string"
    """Option type: 'string', 'enum', 'flag', 'integer'"""
    choices: List[str] = field(default_factory=list)
    """Valid choices for enum type"""
    default: Optional[str] = None
    """Default value if not specified"""
    description: str = ""
    """Description of what this option does"""
    validator: Optional[Callable[[str], bool]] = None
    """Optional validator function: takes value, returns True if valid"""
    
    def to_dict(self) -> Dict[str, Any]:
        """Convert to dictionary."""
        return {
            "name": self.name,
            "type": self.type,
            "choices": self.choices if self.choices else None,
            "default": self.default,
            "description": self.description,
        }


@dataclass
class TUIResultCard:
    """Represents a result as a UI card with title, metadata, and actions.
    
    Used in hub-ui and TUI contexts to render individual search results 
    as grouped components with visual structure.
    """
    title: str
    subtitle: Optional[str] = None
    metadata: Optional[Dict[str, str]] = None
    media_kind: Optional[str] = None
    tag: Optional[List[str]] = None
    file_hash: Optional[str] = None
    file_size: Optional[str] = None
    duration: Optional[str] = None
    
    def __post_init__(self):
        """Initialize default values."""
        if self.metadata is None:
            self.metadata = {}
        if self.tag is None:
            self.tag = []


@dataclass
class ResultColumn:
    """Represents a single column in a result table."""
    name: str
    value: str
    width: Optional[int] = None
    
    def __str__(self) -> str:
        """String representation of the column."""
        return f"{self.name}: {self.value}"
    
    def to_dict(self) -> Dict[str, str]:
        """Convert to dictionary."""
        return {"name": self.name, "value": self.value}


@dataclass
class ResultRow:
    """Represents a single row in a result table."""
    columns: List[ResultColumn] = field(default_factory=list)
    
    def add_column(self, name: str, value: Any) -> None:
        """Add a column to this row."""
        str_value = str(value) if value is not None else ""
        self.columns.append(ResultColumn(name, str_value))
    
    def get_column(self, name: str) -> Optional[str]:
        """Get column value by name."""
        for col in self.columns:
            if col.name.lower() == name.lower():
                return col.value
        return None
    
    def to_dict(self) -> List[Dict[str, str]]:
        """Convert to list of column dicts."""
        return [col.to_dict() for col in self.columns]
    
    def to_list(self) -> List[tuple[str, str]]:
        """Convert to list of (name, value) tuples."""
        return [(col.name, col.value) for col in self.columns]
    
    def __str__(self) -> str:
        """String representation of the row."""
        return " | ".join(str(col) for col in self.columns)