from textual.reactive import Reactive
from textual.app import RenderResult
from textual.widgets import Static, Label

class EnvelopeHeader(Static):

    subject = Reactive("")
    from_ = Reactive("")
    to = Reactive("")
    date = Reactive("")

    """Header for the email viewer."""
    def on_mount(self) -> None:
        """Mount the header."""

    def render(self) -> RenderResult:
        return f"[b][dim]Subject:[/dim] {self.subject}[/] \r\n" \
               f"[dim]From:[/dim] {self.from_} \r\n" \
               f"[dim]To:[/dim] {self.to} \r\n" \
               f"[dim]Date:[/dim] {self.date}"