from textual.widgets import Static
import subprocess

def show_message(app, message_id: int) -> None:
    """Fetch and display the email message by ID."""
    app.query_one("#main_content", Static).loading = True
    try:
        result = subprocess.run(
            ["himalaya", "message", "read", str(message_id)],
            capture_output=True,
            text=True
        )
        if result.returncode == 0:
            # Render the email content as Markdown
            from rich.markdown import Markdown
            markdown_content = Markdown(result.stdout, justify=True)
            app.query_one("#main_content", Static).loading = False
            app.query_one("#main_content", Static).update(markdown_content)
        else:
            app.query_one("#main_content", Static).update(f"Failed to fetch message {message_id}.")
    except Exception as e:
        app.query_one("#main_content", Static).update(f"Error: {e}")