"""Transcription display widget for showing real-time transcriptions."""

import customtkinter as ctk
from typing import List
from datetime import datetime


class TranscriptionDisplay(ctk.CTkTextbox):
    """Custom text widget for displaying transcriptions."""

    def __init__(self, master, max_lines: int = 100, show_timestamps: bool = True, **kwargs):
        """
        Initialize transcription display.

        Args:
            master: Parent widget
            max_lines: Maximum number of lines to keep in display
            show_timestamps: Whether to show timestamps
            **kwargs: Additional arguments for CTkTextbox
        """
        super().__init__(master, **kwargs)

        self.max_lines = max_lines
        self.show_timestamps = show_timestamps
        self.line_count = 0

        # Configure text widget
        self.configure(state="disabled")  # Read-only by default

    def add_transcription(self, text: str, user_name: str = "", timestamp: datetime = None):
        """
        Add a new transcription to the display.

        Args:
            text: Transcription text
            user_name: User/speaker name
            timestamp: Timestamp of transcription
        """
        if timestamp is None:
            timestamp = datetime.now()

        # Build the display line
        line_parts = []

        if self.show_timestamps:
            time_str = timestamp.strftime("%H:%M:%S")
            line_parts.append(f"[{time_str}]")

        if user_name:
            line_parts.append(f"{user_name}:")

        line_parts.append(text)

        line = " ".join(line_parts) + "\n"

        # Add to display
        self.configure(state="normal")
        self.insert("end", line)
        self.configure(state="disabled")

        # Auto-scroll to bottom
        self.see("end")

        # Track line count
        self.line_count += 1

        # Remove old lines if exceeding max
        if self.line_count > self.max_lines:
            self._remove_oldest_lines(self.line_count - self.max_lines)

    def _remove_oldest_lines(self, num_lines: int):
        """
        Remove oldest lines from the display.

        Args:
            num_lines: Number of lines to remove
        """
        self.configure(state="normal")
        self.delete("1.0", f"{num_lines + 1}.0")
        self.configure(state="disabled")
        self.line_count -= num_lines

    def clear(self):
        """Clear all transcriptions."""
        self.configure(state="normal")
        self.delete("1.0", "end")
        self.configure(state="disabled")
        self.line_count = 0

    def get_all_text(self) -> str:
        """
        Get all transcription text.

        Returns:
            All text in the display
        """
        return self.get("1.0", "end")

    def set_max_lines(self, max_lines: int):
        """Update maximum number of lines to keep."""
        self.max_lines = max_lines

        # Trim if necessary
        if self.line_count > self.max_lines:
            self._remove_oldest_lines(self.line_count - self.max_lines)

    def set_show_timestamps(self, show: bool):
        """Update whether to show timestamps."""
        self.show_timestamps = show

    def save_to_file(self, filepath: str) -> bool:
        """
        Save transcriptions to a file.

        Args:
            filepath: Path to save file

        Returns:
            True if saved successfully
        """
        try:
            with open(filepath, 'w') as f:
                f.write(self.get_all_text())
            return True
        except Exception as e:
            print(f"Error saving transcriptions: {e}")
            return False