improvisation_lab/presentation/interval_practice/interval_view_text_manager.py

"""Text management for melody practice.

This class manages the text displayed
in both the web and console versions of the melody practice.
"""

from typing import List, Optional

from improvisation_lab.domain.music_theory import Notes
from improvisation_lab.presentation.view_text_manager import ViewTextManager


class IntervalViewTextManager(ViewTextManager):
    """Displayed text management for melody practice."""

    def __init__(self):
        """Initialize the text manager."""
        super().__init__()

    def update_phrase_text(
        self, current_phrase_idx: int, phrases: Optional[List[List[Notes]]]
    ):
        """Update the phrase text.

        Args:
            current_phrase_idx: The index of the current phrase.
            phrases: The list of phrases.
        """
        if not phrases:
            self.phrase_text = "No phrase data"
            return self.phrase_text

        current_phrase = phrases[current_phrase_idx]
        self.phrase_text = (
            f"Problem {current_phrase_idx + 1}: \n" f"{' -> '.join(current_phrase)}"
        )

        if current_phrase_idx < len(phrases) - 1:
            next_phrase = phrases[current_phrase_idx + 1]
            self.phrase_text += f"\nNext Base Note: {next_phrase[0].value}"