"""Onglet « À propos » : version, et état de la licence.

Affiche le statut licence fourni par le client/stub. Dégrade proprement si la
licence est indisponible (bandeau d'information, pas d'erreur bloquante).
Les widgets ne sont créés qu'à l'instanciation (import sûr pour ``--self-test``).
"""

from __future__ import annotations

from typing import Optional

import customtkinter as ctk

from gui_v6 import __version__ as GUI_VERSION
from gui_v6 import theme as theme_mod
from gui_v6.license_client import LicenseStatus

_STATUS_LABELS = {
    "active": "Licence active",
    "grace": "Licence en période de grâce",
    "expired": "Licence expirée",
    "revoked": "Poste révoqué",
    "invalid": "Licence invalide",
    "unavailable": "Serveur de licence indisponible",
    "none": "Aucune licence",
}


def _build_info() -> str:
    """Version / commit du build, si disponible. Best-effort, sans casser l'UI."""
    try:
        import build_info  # type: ignore

        version = getattr(build_info, "VERSION", "?")
        commit = getattr(build_info, "COMMIT", "?")
        return f"Moteur {version} ({commit})"
    except Exception:
        return "Moteur : information de build indisponible"


class AboutTab(ctk.CTkFrame):
    def __init__(
        self,
        master,
        status: Optional[LicenseStatus] = None,
        theme_name: str = theme_mod.DEFAULT_THEME,
        **kwargs,
    ) -> None:
        super().__init__(master, **kwargs)
        self._theme_name = theme_name

        ctk.CTkLabel(
            self,
            text="Pseudonymisation de vos documents",
            font=ctk.CTkFont(size=18, weight="bold"),
        ).pack(anchor="w", padx=16, pady=(16, 4))

        ctk.CTkLabel(self, text=f"Interface V6 — {GUI_VERSION}").pack(
            anchor="w", padx=16
        )
        ctk.CTkLabel(self, text=_build_info()).pack(anchor="w", padx=16, pady=(0, 12))

        self._status_label = ctk.CTkLabel(self, text="", anchor="w")
        self._status_label.pack(anchor="w", padx=16, pady=(0, 8))

        self.set_status(status or LicenseStatus.none())

    def set_status(self, status: LicenseStatus) -> None:
        label = _STATUS_LABELS.get(status.status, status.status)
        text = f"État licence : {label}"
        if status.expires_at:
            text += f"  ·  expire le {status.expires_at}"
        if status.message:
            text += f"\n{status.message}"
        color = theme_mod.status_color(self._theme_name, status.status)
        self._status_label.configure(text=text, text_color=color)