from __future__ import annotations

import os
import webbrowser
from dataclasses import dataclass
from typing import Any, Callable, Dict, List, Optional, Union

from proxy import __version__, coerce_domain_list
from proxy.balancer import balancer
from utils.update_check import RELEASES_PAGE_URL, get_status
from ui.background_task import BackgroundTask
from ui.connectivity import (
    run_cfproxy_multi_test, run_cfproxy_auto_test, run_cfworker_multi_test,
    show_connectivity_results, show_multi_connectivity_results,
)
from ui.ctk_controls import (
    create_entry, create_checkbox, create_label, create_labeled_entry,
    create_config_section, create_combobox,
)
from ui.ctk_theme import CtkTheme
from ui.ctk_tooltip import attach_ctk_tooltip, attach_tooltip_to_widgets
from ui.settings import validate_settings
from ui.i18n import (
    label_from_language, language_from_label, language_option_labels,
    set_language, get_language, t,
)

_INNER_W = 396
_APPEARANCE_KEYS = ("auto", "light", "dark")
_APPEARANCE_TO_CTK = {"auto": "system", "light": "Light", "dark": "Dark"}


def _get_doc_url(doc_name: str) -> str:
    lang = get_language().value
    lang_folder = "EN" if lang == "en" else "RU"
    return f"https://github.com/Flowseal/tg-ws-proxy/blob/main/docs/{lang_folder}/{doc_name}.md"


def _appearance_options() -> List[str]:
    return [t(f"appearance.{key}") for key in _APPEARANCE_KEYS]


def _appearance_from_cfg(value: str) -> str:
    if value in _APPEARANCE_KEYS:
        return t(f"appearance.{value}")
    return t("appearance.auto")


def _appearance_to_cfg(label: str) -> str:
    for key in _APPEARANCE_KEYS:
        if t(f"appearance.{key}") == label:
            return key
    return "auto"


@dataclass
class TrayConfigFormWidgets:
    host_var: Any
    port_var: Any
    secret_var: Any
    dc_textbox: Any
    verbose_var: Any
    no_secure_var: Any
    advanced_vars: Dict[str, Any]
    autostart_var: Optional[Any]
    check_updates_var: Optional[Any]
    cfproxy_var: Optional[Any] = None
    cfproxy_user_domain_enabled_var: Optional[Any] = None
    cfproxy_user_domain_var: Optional[Any] = None
    cfproxy_worker_enabled_var: Optional[Any] = None
    cfproxy_worker_domain_var: Optional[Any] = None
    appearance_var: Optional[Any] = None
    language_var: Optional[Any] = None


def install_tray_config_form(
    ctk: Any,
    frame: Any,
    theme: CtkTheme,
    cfg: dict,
    default_config: dict,
    *,
    show_autostart: bool = False,
    autostart_value: bool = False,
    on_update_click: Optional[Callable[[], None]] = None,
) -> TrayConfigFormWidgets:
    set_language(cfg.get("language", default_config["language"]))
    no_secure_var = ctk.BooleanVar(master=frame, value=cfg.get("no_secure", False))

    _create_header(ctk, frame, theme)
    appearance_var, language_var = _create_interface(ctk, frame, theme, cfg, default_config)
    host_var, port_var, secret_var = _create_connection(ctk, frame, theme, cfg, default_config)
    dc_textbox = _create_dc(ctk, frame, theme, cfg, default_config)
    cfproxy_var, cf_custom_cb_var, cfproxy_user_domain_var = _create_cfproxy(
        ctk, frame, theme, cfg, default_config, no_secure_var,
    )
    cfproxy_worker_enabled_var, cfproxy_worker_domain_var = _create_cfworker(
        ctk, frame, theme, cfg, default_config, no_secure_var,
    )
    verbose_var, advanced_vars = _create_logging(
        ctk, frame, theme, cfg, default_config, no_secure_var,
    )
    check_updates_var = _create_updates(ctk, frame, theme, cfg, default_config, on_update_click)
    autostart_var = _create_autostart(ctk, frame, theme, show_autostart, autostart_value)

    return TrayConfigFormWidgets(
        host_var=host_var, port_var=port_var, secret_var=secret_var,
        dc_textbox=dc_textbox, verbose_var=verbose_var, no_secure_var=no_secure_var,
        advanced_vars=advanced_vars,
        autostart_var=autostart_var, check_updates_var=check_updates_var,
        cfproxy_var=cfproxy_var,
        cfproxy_user_domain_enabled_var=cf_custom_cb_var,
        cfproxy_user_domain_var=cfproxy_user_domain_var,
        cfproxy_worker_enabled_var=cfproxy_worker_enabled_var,
        cfproxy_worker_domain_var=cfproxy_worker_domain_var,
        appearance_var=appearance_var,
        language_var=language_var,
    )


def _create_header(ctk, frame, theme):
    header = ctk.CTkFrame(frame, fg_color="transparent")
    header.pack(fill="x", pady=(0, 2))
    ctk.CTkLabel(
        header, text=t("settings.title"),
        font=(theme.ui_font_family, 17, "bold"),
        text_color=theme.text_primary, anchor="w",
    ).pack(side="left")
    ctk.CTkLabel(
        header, text=f"v{__version__}",
        font=(theme.ui_font_family, 12),
        text_color=theme.text_secondary, anchor="e",
    ).pack(side="right", padx=(4, 0))

    ctk.CTkButton(
        header, text="Donate ♥", width=90, height=28,
        font=(theme.ui_font_family, 13, "bold"), corner_radius=8,
        fg_color="#22c55e", hover_color="#16a34a",
        text_color="#ffffff", border_width=0,
        command=lambda: (
            header.winfo_toplevel().iconify(),
            webbrowser.open(_get_doc_url("Funding")),
        ),
    ).pack(side="right", padx=(0, 6))


def _create_interface(ctk, frame, theme, cfg, default_config):
    lang_cfg = cfg.get("language", default_config["language"])
    appearance_var = ctk.StringVar(
        master=frame, value=_appearance_from_cfg(cfg.get("appearance", "auto"))
    )

    def _on_appearance_change(choice: str) -> None:
        cfg_val = _appearance_to_cfg(choice)
        ctk.set_appearance_mode(_APPEARANCE_TO_CTK[cfg_val])

    ui_inner = create_config_section(ctk, frame, theme, t("section.interface"))
    ui_row = ctk.CTkFrame(ui_inner, fg_color="transparent")
    ui_row.pack(fill="x")

    lang_col = ctk.CTkFrame(ui_row, fg_color="transparent")
    lang_col.pack(side="left", fill="x", expand=True, padx=(0, 8))

    theme_col = ctk.CTkFrame(ui_row, fg_color="transparent")
    theme_col.pack(side="left", fill="x", expand=True, padx=(8, 0))

    language_var = ctk.StringVar(master=frame, value=label_from_language(lang_cfg))
    create_label(ctk, lang_col, theme, t("settings.language"), size=11).pack(
        anchor="w", pady=(0, 2)
    )
    create_combobox(
        ctk, lang_col, theme, variable=language_var,
        values=[label for _, label in language_option_labels()],
    ).pack(fill="x")
    create_label(ctk, theme_col, theme, t("settings.theme"), size=11).pack(
        anchor="w", pady=(0, 2)
    )
    create_combobox(
        ctk, theme_col, theme, variable=appearance_var,
        values=_appearance_options(), command=_on_appearance_change,
    ).pack(fill="x")
    return appearance_var, language_var


def _create_connection(ctk, frame, theme, cfg, default_config):
    conn = create_config_section(ctk, frame, theme, t("section.mtproto"))

    host_row = ctk.CTkFrame(conn, fg_color="transparent")
    host_row.pack(fill="x")

    host_col, host_var = create_labeled_entry(
        ctk, host_row, theme, t("label.host"),
        cfg.get("host", default_config["host"]),
        tip=t("tip.host"), width=160, pack_fill=True,
    )
    host_col.pack(side="left", fill="x", expand=True, padx=(0, 10))

    port_col, port_var = create_labeled_entry(
        ctk, host_row, theme, t("label.port"),
        cfg.get("port", default_config["port"]),
        tip=t("tip.port"), width=100,
    )
    port_col.pack(side="left")

    secret_row = ctk.CTkFrame(conn, fg_color="transparent")
    secret_row.pack(fill="x")

    secret_col, secret_var = create_labeled_entry(
        ctk, secret_row, theme, t("label.secret"),
        cfg.get("secret", default_config["secret"]),
        tip=t("tip.secret"), width=160, pack_fill=True,
    )
    secret_col.pack(side="left", fill="x", expand=True, padx=(0, 10))

    regen_col = ctk.CTkFrame(secret_row, fg_color="transparent")
    regen_col.pack(side="left", anchor="s")
    ctk.CTkLabel(regen_col, text="", font=(theme.ui_font_family, 12)).pack(pady=(0, 2))
    ctk.CTkButton(
        regen_col, text="↺", width=36, height=36,
        font=(theme.ui_font_family, 18), corner_radius=10,
        fg_color=theme.tg_blue, hover_color=theme.tg_blue_hover,
        text_color="#ffffff", border_width=1, border_color=theme.field_border,
        command=lambda: secret_var.set(os.urandom(16).hex()),
    ).pack()
    return host_var, port_var, secret_var


def _create_dc(ctk, frame, theme, cfg, default_config):
    dc_inner = create_config_section(ctk, frame, theme, t("section.dc"))
    dc_lbl = create_label(ctk, dc_inner, theme, t("label.dc_hint"), size=11)
    dc_lbl.pack(anchor="w", pady=(0, 4))
    dc_textbox = ctk.CTkTextbox(
        dc_inner, width=_INNER_W, height=88,
        font=(theme.mono_font_family, 12), corner_radius=10,
        fg_color=theme.bg, border_color=theme.field_border,
        border_width=1, text_color=theme.text_primary,
    )
    dc_textbox.pack(fill="x")
    dc_textbox.insert("1.0", "\n".join(cfg.get("dc_ip", default_config["dc_ip"])))
    attach_tooltip_to_widgets([dc_lbl, dc_textbox], t("tip.dc"))
    return dc_textbox


def _create_cfproxy(ctk, frame, theme, cfg, default_config, no_secure_var):
    cf_inner = create_config_section(ctk, frame, theme, t("section.cfproxy"))

    cf_row = ctk.CTkFrame(cf_inner, fg_color="transparent")
    cf_row.pack(fill="x", pady=(0, 4))

    cfproxy_var = ctk.BooleanVar(
        master=frame, value=cfg.get("cfproxy", default_config.get("cfproxy", True))
    )
    cf_cb = create_checkbox(ctk, cf_row, theme, t("label.cf_enable"), cfproxy_var)
    cf_cb.pack(side="left", padx=(0, 16))
    attach_ctk_tooltip(cf_cb, t("tip.cfproxy"))

    cf_test = BackgroundTask(frame.winfo_toplevel())

    def _on_cf_test():
        secure = not no_secure_var.get()
        user_domains = (
            coerce_domain_list(cfproxy_user_domain_var.get())
            if cf_custom_cb_var.get() else []
        )
        if cf_test.running:
            return
        _cf_test_widget.configure(text=t("button.test_loading"), state="disabled")

        def finish():
            _cf_test_widget.configure(text=t("button.test"), state="normal")

        if user_domains:
            cf_test.start(
                lambda: run_cfproxy_multi_test(user_domains, secure=secure),
                lambda per: show_multi_connectivity_results(
                    t("connectivity.cfproxy_title"), per, label_prefix="kws",
                    parent=frame.winfo_toplevel(),
                ),
                finish,
            )
        else:
            domains = list(balancer.domains)
            cf_test.start(
                lambda: run_cfproxy_auto_test(domains, secure=secure),
                lambda result: show_connectivity_results(
                    t("connectivity.cfproxy_title"), result[1],
                    domain=result[0] or "", auto_mode=True,
                    unavailable_message=t("connectivity.cf_auto_fail"),
                    parent=frame.winfo_toplevel(),
                ),
                finish,
            )

    _cf_test_widget = ctk.CTkButton(
        cf_row, text=t("button.test"), width=56, height=28,
        font=(theme.ui_font_family, 13), corner_radius=8,
        fg_color=theme.tg_blue, hover_color=theme.tg_blue_hover,
        text_color="#ffffff", border_width=1, border_color=theme.field_border,
        command=_on_cf_test,
    )
    _cf_test_widget.pack(side="right")

    cf_custom_row = ctk.CTkFrame(cf_inner, fg_color="transparent")
    cf_custom_row.pack(fill="x")

    saved_user_domains = coerce_domain_list(
        cfg.get("cfproxy_user_domain", default_config.get("cfproxy_user_domain", ""))
    )
    cf_custom_cb_var = ctk.BooleanVar(
        master=frame, value=cfg.get("cfproxy_user_domain_enabled", bool(saved_user_domains))
    )
    cf_custom_cb = create_checkbox(ctk, cf_custom_row, theme, t("label.cf_custom_domain"), cf_custom_cb_var)
    cf_custom_cb.pack(side="left", padx=(0, 10))
    attach_ctk_tooltip(cf_custom_cb, t("tip.cfproxy_user_domain_cb"))

    ctk.CTkButton(
        cf_custom_row, text="?", width=28, height=32,
        font=(theme.ui_font_family, 14), corner_radius=8,
        fg_color=theme.tg_blue, hover_color=theme.tg_blue_hover,
        text_color="#ffffff", border_width=1, border_color=theme.field_border,
        command=lambda: webbrowser.open(_get_doc_url("CfProxy")),
    ).pack(side="right")

    cfproxy_user_domain_var = ctk.StringVar(master=frame, value=", ".join(saved_user_domains))
    cf_domain_entry = create_entry(
        ctk, cf_custom_row, theme, var=cfproxy_user_domain_var,
        height=32, radius=8,
    )
    cf_domain_entry.pack(side="left", fill="x", expand=True, padx=(0, 6))
    attach_ctk_tooltip(cf_domain_entry, t("tip.cfproxy_domain"))

    def _sync_domain_entry(*_):
        state = "normal" if cf_custom_cb_var.get() else "disabled"
        cf_domain_entry.configure(state=state)

    cf_custom_cb_var.trace_add("write", _sync_domain_entry)
    _sync_domain_entry()
    return cfproxy_var, cf_custom_cb_var, cfproxy_user_domain_var


def _create_cfworker(ctk, frame, theme, cfg, default_config, no_secure_var):
    cf_worker_inner = create_config_section(ctk, frame, theme, t("section.cfworker"))

    cf_worker_row = ctk.CTkFrame(cf_worker_inner, fg_color="transparent")
    cf_worker_row.pack(fill="x", pady=(0, 4))
    cf_worker_lbl = create_label(ctk, cf_worker_row, theme, t("label.cfworker_domains"), size=11)
    cf_worker_lbl.pack(side="left", anchor="w", pady=(0, 2))

    cf_worker_input = ctk.CTkFrame(cf_worker_inner, fg_color="transparent")
    cf_worker_input.pack(fill="x")

    saved_worker_domains = coerce_domain_list(
        cfg.get("cfproxy_worker_domain", default_config.get("cfproxy_worker_domain", ""))
    )
    cfproxy_worker_enabled_var = ctk.BooleanVar(
        master=frame, value=cfg.get("cfproxy_worker_enabled", bool(saved_worker_domains))
    )
    cf_worker_cb = create_checkbox(
        ctk, cf_worker_input, theme, t("label.cf_custom_domain"),
        cfproxy_worker_enabled_var,
    )
    cf_worker_cb.pack(side="left", padx=(0, 10))
    attach_ctk_tooltip(cf_worker_cb, t("tip.cfworker_domain"))

    cfproxy_worker_domain_var = ctk.StringVar(master=frame, value=", ".join(saved_worker_domains))
    cf_worker_entry = create_entry(
        ctk, cf_worker_input, theme, var=cfproxy_worker_domain_var,
        height=32, radius=8,
    )
    cf_worker_entry.pack(side="left", fill="x", expand=True, padx=(0, 6))
    attach_tooltip_to_widgets([cf_worker_lbl, cf_worker_entry], t("tip.cfworker_domain"))

    worker_test = BackgroundTask(frame.winfo_toplevel())

    def _sync_cfworker_test_button(*_):
        btn = _cfworker_test_widget
        enabled = (
            not worker_test.running and cfproxy_worker_enabled_var.get()
            and bool(coerce_domain_list(cfproxy_worker_domain_var.get()))
        )
        btn.configure(state="normal" if enabled else "disabled")

    def _on_cfworker_test():
        secure = not no_secure_var.get()
        domains = coerce_domain_list(cfproxy_worker_domain_var.get())
        if worker_test.running or not cfproxy_worker_enabled_var.get() or not domains:
            return
        _cfworker_test_widget.configure(text=t("button.test_loading"), state="disabled")

        def finish():
            _cfworker_test_widget.configure(text=t("button.test"))
            _sync_cfworker_test_button()

        worker_test.start(
            lambda: run_cfworker_multi_test(domains, secure=secure),
            lambda per: show_multi_connectivity_results(
                t("connectivity.cfworker_title"), per, label_prefix="DC",
                parent=frame.winfo_toplevel(),
            ),
            finish,
        )

    ctk.CTkButton(
        cf_worker_input, text="?", width=28, height=32,
        font=(theme.ui_font_family, 14), corner_radius=8,
        fg_color=theme.tg_blue, hover_color=theme.tg_blue_hover,
        text_color="#ffffff", border_width=1, border_color=theme.field_border,
        command=lambda: webbrowser.open(_get_doc_url("CfWorker")),
    ).pack(side="right")

    _cfworker_test_widget = ctk.CTkButton(
        cf_worker_row, text=t("button.test"), width=56, height=28,
        font=(theme.ui_font_family, 13), corner_radius=8,
        fg_color=theme.tg_blue, hover_color=theme.tg_blue_hover,
        text_color="#ffffff", border_width=1, border_color=theme.field_border,
        command=_on_cfworker_test,
    )
    _cfworker_test_widget.pack(side="right")

    def _sync_cfworker_entry(*_):
        state = "normal" if cfproxy_worker_enabled_var.get() else "disabled"
        cf_worker_entry.configure(state=state)
        _sync_cfworker_test_button()

    cfproxy_worker_enabled_var.trace_add("write", _sync_cfworker_entry)
    cfproxy_worker_domain_var.trace_add("write", _sync_cfworker_test_button)
    _sync_cfworker_entry()
    return cfproxy_worker_enabled_var, cfproxy_worker_domain_var


def _create_logging(ctk, frame, theme, cfg, default_config, no_secure_var):
    log_inner = create_config_section(ctk, frame, theme, t("section.logs"))

    verbose_var = ctk.BooleanVar(master=frame, value=cfg.get("verbose", False))
    verbose_cb = create_checkbox(ctk, log_inner, theme, t("label.verbose"), verbose_var)
    verbose_cb.pack(anchor="w", pady=(0, 6))
    attach_ctk_tooltip(verbose_cb, t("tip.verbose"))

    no_secure_cb = create_checkbox(ctk, log_inner, theme, t("label.no_secure"), no_secure_var)
    no_secure_cb.pack(anchor="w", pady=(0, 6))
    attach_ctk_tooltip(no_secure_cb, t("tip.no_secure"))

    adv_frame = ctk.CTkFrame(log_inner, fg_color="transparent")
    adv_frame.pack(fill="x")

    adv_rows = [
        (t("label.buf_kb"), "buf_kb", t("tip.buf_kb")),
        (t("label.pool_size"), "pool_size", t("tip.pool")),
        (t("label.log_max_mb"), "log_max_mb", t("tip.log_mb")),
    ]
    advanced_vars = {}
    for label_text, key, tip in adv_rows:
        col = ctk.CTkFrame(adv_frame, fg_color="transparent")
        col.pack(fill="x", pady=(0, 0 if key == "log_max_mb" else 5))
        adv_l = create_label(ctk, col, theme, label_text, size=11)
        adv_l.pack(anchor="w", pady=(0, 2))
        advanced_vars[key] = ctk.StringVar(master=frame, value=str(cfg.get(key, default_config[key])))
        adv_e = create_entry(
            ctk, col, theme, width=_INNER_W, height=32, radius=8,
            var=advanced_vars[key],
        )
        adv_e.pack(fill="x")
        attach_tooltip_to_widgets([adv_l, adv_e, col], tip)
    return verbose_var, advanced_vars


def _create_updates(ctk, frame, theme, cfg, default_config, on_update_click):
    upd_inner = create_config_section(ctk, frame, theme, t("section.updates"))
    st = get_status()
    check_updates_var = ctk.BooleanVar(
        master=frame, value=bool(cfg.get("check_updates", default_config.get("check_updates", True)))
    )
    upd_cb = create_checkbox(ctk, upd_inner, theme, t("label.check_updates"), check_updates_var)
    upd_cb.pack(anchor="w", pady=(0, 6))
    attach_ctk_tooltip(upd_cb, t("tip.check_updates"))

    if st.get("error"):
        upd_status = t("updates.status_error")
    elif not st.get("checked"):
        upd_status = t("updates.status_pending")
    elif st.get("has_update") and st.get("latest"):
        upd_status = t("updates.status_available", latest=st["latest"], current=__version__)
    elif st.get("ahead_of_release") and st.get("latest"):
        upd_status = t("updates.status_ahead", current=__version__, latest=st["latest"])
    else:
        upd_status = t("updates.status_latest")

    create_label(ctk, upd_inner, theme, upd_status, size=11,
           justify="left", wraplength=_INNER_W).pack(anchor="w", pady=(0, 8))

    rel_url = (st.get("html_url") or "").strip() or RELEASES_PAGE_URL
    if st.get("has_update") and on_update_click is not None:
        upd_btn_row = ctk.CTkFrame(upd_inner, fg_color="transparent")
        upd_btn_row.pack(fill="x")
        upd_btn_row.grid_columnconfigure(0, weight=1)
        upd_btn_row.grid_columnconfigure(1, weight=1)
        ctk.CTkButton(
            upd_btn_row, text=t("button.open_release"), height=32,
            font=(theme.ui_font_family, 13), corner_radius=8,
            fg_color=theme.field_bg, hover_color=theme.field_border,
            text_color=theme.text_primary, border_width=1,
            border_color=theme.field_border,
            command=lambda u=rel_url: webbrowser.open(u),
        ).grid(row=0, column=0, sticky="ew", padx=(0, 4))
        ctk.CTkButton(
            upd_btn_row, text=t("button.update"), height=32,
            font=(theme.ui_font_family, 13, "bold"), corner_radius=8,
            fg_color=theme.tg_blue, hover_color=theme.tg_blue_hover,
            text_color="#ffffff",
            command=on_update_click,
        ).grid(row=0, column=1, sticky="ew", padx=(4, 0))
    else:
        ctk.CTkButton(
            upd_inner, text=t("button.open_release"), height=32,
            font=(theme.ui_font_family, 13), corner_radius=8,
            fg_color=theme.field_bg, hover_color=theme.field_border,
            text_color=theme.text_primary, border_width=1,
            border_color=theme.field_border,
            command=lambda u=rel_url: webbrowser.open(u),
        ).pack(anchor="w")
    return check_updates_var


def _create_autostart(ctk, frame, theme, show_autostart, autostart_value):
    autostart_var = None
    if show_autostart:
        sys_inner = create_config_section(ctk, frame, theme, t("section.windows_startup"), bottom_spacer=4)
        autostart_var = ctk.BooleanVar(master=frame, value=autostart_value)
        as_cb = create_checkbox(ctk, sys_inner, theme, t("label.autostart"), autostart_var)
        as_cb.pack(anchor="w", pady=(0, 4))
        as_hint = create_label(
            ctk, sys_inner, theme,
            t("label.autostart_hint"),
            size=11, justify="left", wraplength=_INNER_W,
        )
        as_hint.pack(anchor="w")
        attach_tooltip_to_widgets([as_cb, as_hint], t("tip.autostart"))
    return autostart_var


def validate_config_form(
    widgets: TrayConfigFormWidgets,
    default_config: dict,
    *,
    include_autostart: bool,
) -> Union[dict, str]:
    values = {
        "host": widgets.host_var.get(),
        "port": widgets.port_var.get(),
        "secret": widgets.secret_var.get(),
        "dc_ip": widgets.dc_textbox.get("1.0", "end"),
        "verbose": bool(widgets.verbose_var.get()),
    }
    for key, var in widgets.advanced_vars.items():
        values[key] = var.get()
    for key in (
        "check_updates", "cfproxy", "cfproxy_user_domain_enabled",
        "cfproxy_worker_enabled", "no_secure",
    ):
        var = getattr(widgets, f"{key}_var")
        if var is not None:
            values[key] = bool(var.get())
    for key in ("cfproxy_user_domain", "cfproxy_worker_domain"):
        var = getattr(widgets, f"{key}_var")
        if var is not None:
            values[key] = var.get()
    if include_autostart:
        values["autostart"] = (
            bool(widgets.autostart_var.get())
            if widgets.autostart_var is not None else False
        )
    if widgets.appearance_var is not None:
        values["appearance"] = _appearance_to_cfg(widgets.appearance_var.get())
    if widgets.language_var is not None:
        values["language"] = language_from_label(widgets.language_var.get()).value
    return validate_settings(values, default_config)