# This file is part of Xpra.
# Copyright (C) 2023 Antoine Martin <antoine@xpra.org>
# Xpra is released under the terms of the GNU GPL v2, or, at your option, any
# later version. See the file COPYING for details.

from xpra.gtk.dialogs.base_gui_window import BaseGUIWindow
from xpra.gtk.configure.common import update_config_attribute, with_config, run_gui
from xpra.gtk.widget import label
from xpra.os_util import gi_import
from xpra.log import Logger

Gtk = gi_import("Gtk")
GLib = gi_import("GLib")

log = Logger("util")


def adj1_100(value: int) -> Gtk.Adjustment:
    return Gtk.Adjustment(value=value, lower=1, upper=100, step_increment=5, page_increment=0, page_size=0)


def make_scale(adjust, marks: dict) -> Gtk.Scale:
    scale = Gtk.Scale(orientation=Gtk.Orientation.HORIZONTAL, adjustment=adjust)
    for value, text in marks.items():
        scale.add_mark(value=value, position=Gtk.PositionType.TOP, markup=text)
    scale.set_digits(0)
    scale.set_draw_value(True)
    scale.set_has_origin(True)
    return scale


class ConfigureGUI(BaseGUIWindow):

    def __init__(self, parent: Gtk.Window | None = None):
        super().__init__(
            "Configure Xpra's Picture Compression",
            "encoding.png",
            wm_class=("xpra-configure-encodings-gui", "Xpra Configure Encodings GUI"),
            default_size=(640, 500),
            header_bar=(False, False),
            parent=parent,
        )

    def populate(self):
        with_config(self.do_populate)

    def do_populate(self, config):
        self.clear_vbox()
        self.add_widget(label("Configure Xpra's Picture Compression", font="sans 20"))
        url = "https://github.com/Xpra-org/xpra/blob/master/docs/Usage/Encodings.md#tuning"
        self.add_text_lines((
            f"Please read <a href='{url}'>the documentation</a>.",
        ))
        self.add_widget(Gtk.Separator(orientation=Gtk.Orientation.HORIZONTAL))
        self.add_widget(label("Minimum Speed (percentage)", font="Sans 14"))
        self.add_widget(label("Increasing the speed costs bandwidth and CPU time"))
        scale = make_scale(adj1_100(config.min_speed), {
            1 : "Lowest",
            50 : "Average",
            100 : "Highest",
        })
        scale.connect("value-changed", self.speed_changed)
        self.add_widget(scale)
        self.add_widget(Gtk.Separator(orientation=Gtk.Orientation.HORIZONTAL))
        self.add_widget(label("Minimum Quality (percentage)", font="Sans 14"))
        self.add_widget(label("Increasing the quality costs bandwidth, CPU time and may also increase the latency"))
        scale = make_scale(adj1_100(config.min_quality), {
            1 : "Lowest",
            50 : "Average",
            100 : "Highest",
        })
        scale.connect("value-changed", self.quality_changed)
        self.add_widget(scale)
        self.add_widget(Gtk.Separator(orientation=Gtk.Orientation.HORIZONTAL))
        self.add_widget(label("Auto Refresh Delay (milliseconds)", font="Sans 14"))
        self.add_widget(label("Longer delays may become noticeable but save bandwidth"))
        adjust = Gtk.Adjustment(value=config.auto_refresh_delay, lower=0, upper=1000,
                                step_increment=50, page_increment=0, page_size=0)
        scale = make_scale(adjust, {
            0 : "Disabled",
            50 : "Fast",
            500 : "Average",
            1000: "Slow",
        })
        scale.connect("value-changed", self.ar_changed)
        self.add_widget(scale)
        self.add_widget(Gtk.Separator(orientation=Gtk.Orientation.HORIZONTAL))
        grid = Gtk.Grid()
        grid.set_margin_start(40)
        grid.set_margin_end(40)
        grid.set_row_homogeneous(True)
        grid.set_column_homogeneous(False)
        self.add_widget(grid)
        switch = Gtk.Switch()
        switch.set_state(config.encoding == "grayscale")
        switch.connect("state-set", self.toggle_grayscale)
        lbl = label("Grayscale Mode")
        lbl.set_hexpand(True)
        grid.attach(lbl, 0, 0, 1, 1)
        grid.attach(switch, 1, 0, 1, 1)
        self.show_all()

    @staticmethod
    def speed_changed(widget):
        update_config_attribute("min-speed", int(widget.get_value()))

    @staticmethod
    def quality_changed(widget):
        update_config_attribute("min-quality", int(widget.get_value()))

    @staticmethod
    def ar_changed(widget):
        update_config_attribute("auto-refresh-delay", int(widget.get_value())/1000)

    @staticmethod
    def toggle_grayscale(_widget, state):
        update_config_attribute("encoding", "grayscale" if state else "auto")


def main(_args) -> int:
    return run_gui(ConfigureGUI)


if __name__ == "__main__":
    import sys
    sys.exit(main(sys.argv[1:]))
