from gi.repository import Gtk, Adw, Gio, Gdk
from .constants import rootdir
import time
from .run_async import RunAsync


@Gtk.Template(resource_path=f"{rootdir}/ui/welcome.ui")
class GradienceWelcomeWindow(Adw.Window):
    __gtype_name__ = "GradienceWelcomeWindow"

    settings = Gtk.Settings.get_default()

    carousel = Gtk.Template.Child()
    btn_close = Gtk.Template.Child()
    btn_back = Gtk.Template.Child()
    btn_next = Gtk.Template.Child()
    btn_install = Gtk.Template.Child()
    progressbar = Gtk.Template.Child()
    page_welcome = Gtk.Template.Child()
    page_gradience = Gtk.Template.Child()
    page_configure = Gtk.Template.Child()
    page_download = Gtk.Template.Child()
    page_finish = Gtk.Template.Child()
    img_welcome = Gtk.Template.Child()
    label_skip = Gtk.Template.Child()
    switch_system = Gtk.Template.Child()
    switch_adw_gtk3 = Gtk.Template.Child()

    carousel_pages = [
        "welcome",
        "gradience",
        "configure",
        "download",
        "finish"
    ]
    images = [
        f"{rootdir}/images/welcome.svg",
        f"{rootdir}/images/welcome-dark.svg",
    ]

    def __init__(self, window, **kwargs) -> None:
        super().__init__(**kwargs)
        self.set_transient_for(window)

        # common variables and references
        self.window = window

        # connect signals
        self.connect("close-request", self.quit)
        self.carousel.connect('page-changed', self.page_changed)
        self.btn_close.connect("clicked", self.close_window)
        self.btn_back.connect("clicked", self.previous_page)
        self.btn_next.connect("clicked", self.next_page)
        self.btn_install.connect("clicked", self.install_runner)
        self.settings.connect(
            "notify::gtk-application-prefer-dark-theme",
            self.theme_changed)

        self.btn_close.set_sensitive(False)

        if self.settings.get_property("gtk-application-prefer-dark-theme"):
            self.img_welcome.set_from_resource(self.images[1])

        self.page_changed()

    def theme_changed(self, settings, key):
        self.img_welcome.set_from_resource(
            self.images[settings.get_property("gtk-application-prefer-dark-theme")])

    def get_page(self, index):
        return self.carousel_pages[index]

    def page_changed(self, widget=False, index=0, *_args):
        """
        This function is called on first load and when the user require
        to change the page. It sets the widgets' status according to
        the step of the onboard progress.
        """
        page = self.get_page(index)

        if page == "finish":
            self.btn_back.set_visible(False)
            self.btn_next.set_visible(False)
        elif page == "download":
            self.btn_back.set_visible(True)
            self.btn_next.set_visible(False)
            self.btn_install.set_visible(True)
        elif page == "welcome":
            self.btn_back.set_visible(False)
            self.btn_next.set_visible(True)
        else:
            self.btn_back.set_visible(True)
            self.btn_next.set_visible(True)

    @staticmethod
    def quit(widget=False):
        quit()

    def check_adw_gtk3(self):
        print("check if adw-gtk3 installed")
        return True

    def adw_gtk3(self):
        if not self.check_adw_gtk3(): #install
            print("install adw-gtk3")

    def configure_system(self):
        print("confiure system")

    def install_runner(self, widget):
        def set_completed(result, error=False):
            self.label_skip.set_visible(False)
            self.btn_close.set_sensitive(True)
            self.window.settings.set_boolean("first-run", False)
            self.next_page()

        self.installing = True
        self.btn_back.set_visible(False)
        self.btn_next.set_visible(False)
        self.btn_install.set_visible(False)
        self.progressbar.set_visible(True)
        self.carousel.set_allow_long_swipes(False)
        self.carousel.set_allow_mouse_drag(False)
        self.carousel.set_allow_scroll_wheel(False)
        self.set_deletable(False)

        def install():
            if self.switch_adw_gtk3.get_active():
                self.adw_gtk3()
            
            if self.switch_user.get_active():
                self.configure_system()

        RunAsync(self.pulse)
        RunAsync(
            install,
            callback=set_completed,
        )

    def previous_page(self, widget=False):
        index = int(self.carousel.get_position())
        previous_page = self.carousel.get_nth_page(index - 1)
        self.carousel.scroll_to(previous_page, True)

    def next_page(self, widget=False):
        index = int(self.carousel.get_position())
        next_page = self.carousel.get_nth_page(index + 1)
        self.carousel.scroll_to(next_page, True)

    def pulse(self):
        # This function update the progress bar every 1s.
        while True:
            time.sleep(.5)
            self.progressbar.pulse()

    def close_window(self, widget):
        self.destroy()
        self.window.present()