# -*- coding: utf-8 -*-
"""
F5: Nutzungsvereinbarung — Markdown-Anzeige + Akzeptieren-Checkbox.
"""

from __future__ import annotations

from pathlib import Path

from textual.widgets import Checkbox, Label, Markdown, Static

from .base import InstallerView


class AgreementView(InstallerView):
    """Nutzungsvereinbarung (F5)."""

    TITLE = "Vereinbarung"
    VIEW_ID = "agreement"
    MODES = ["server", "client", "standalone", "config"]

    def compose(self):
        yield Static("── Nutzungsvereinbarung ──", classes="section-header")

        # Markdown laden
        agreement_path = Path(__file__).parent.parent / "agreement.md"
        if agreement_path.is_file():
            content = agreement_path.read_text(encoding="utf-8")
        else:
            content = "*Vereinbarungstext nicht gefunden.*"

        yield Markdown(content, id="agreement-text")
        yield Label("")
        yield Checkbox(
            "Ich akzeptiere die Nutzungsbedingungen",
            value=self._config.agreement_accepted,
            id="cb-agreement",
        )

    def on_checkbox_changed(self, event: Checkbox.Changed) -> None:
        if event.checkbox.id == "cb-agreement":
            self._config.agreement_accepted = event.value

    def validate(self) -> str | None:
        if not self._config.agreement_accepted:
            return "Nutzungsbedingungen muessen akzeptiert werden"
        return None