#!/usr/bin/env python
# License: GPL v3 Copyright: 2018, Kovid Goyal <kovid at kovidgoyal.net>

import sys
from collections.abc import Callable
from contextlib import suppress
from functools import partial
from typing import Any, Mapping, Sequence

from kitty.cli import parse_args
from kitty.cli_stub import PanelCLIOptions
from kitty.constants import is_macos, is_wayland, kitten_exe
from kitty.fast_data_types import (
    GLFW_EDGE_BOTTOM,
    GLFW_EDGE_CENTER,
    GLFW_EDGE_LEFT,
    GLFW_EDGE_NONE,
    GLFW_EDGE_RIGHT,
    GLFW_EDGE_TOP,
    GLFW_FOCUS_EXCLUSIVE,
    GLFW_FOCUS_NOT_ALLOWED,
    GLFW_FOCUS_ON_DEMAND,
    GLFW_LAYER_SHELL_BACKGROUND,
    GLFW_LAYER_SHELL_OVERLAY,
    GLFW_LAYER_SHELL_PANEL,
    GLFW_LAYER_SHELL_TOP,
    glfw_primary_monitor_size,
    make_x11_window_a_dock_window,
    toggle_os_window_visibility,
)
from kitty.os_window_size import WindowSizeData, edge_spacing
from kitty.simple_cli_definitions import panel_kitten_options_spec
from kitty.types import LayerShellConfig
from kitty.typing_compat import BossType, EdgeLiteral
from kitty.utils import log_error

quake = (
    'kitty +kitten panel --edge=top --layer=overlay --lines=25 --focus-policy=exclusive'
    ' -o background_opacity=0.8 --toggle-visibility --single-instance --instance-group=quake'
)
default_quake_cmdline = f'{quake} --exclusive-zone=0 --override-exclusive-zone --detach'
default_macos_quake_cmdline = f'{quake}'


args = PanelCLIOptions()
help_text = 'Use a command line program to draw a GPU accelerated panel on your desktop'
usage = '[cmdline-to-run ...]'


def parse_panel_args(args: list[str]) -> tuple[PanelCLIOptions, list[str]]:
    return parse_args(args, panel_kitten_options_spec, usage, help_text, 'kitty +kitten panel', result_class=PanelCLIOptions)


Strut = tuple[int, int, int, int, int, int, int, int, int, int, int, int]


def create_strut(
    win_id: int,
    left: int = 0, right: int = 0, top: int = 0, bottom: int = 0, left_start_y: int = 0, left_end_y: int = 0,
    right_start_y: int = 0, right_end_y: int = 0, top_start_x: int = 0, top_end_x: int = 0,
    bottom_start_x: int = 0, bottom_end_x: int = 0
) -> Strut:
    return left, right, top, bottom, left_start_y, left_end_y, right_start_y, right_end_y, top_start_x, top_end_x, bottom_start_x, bottom_end_x


def create_top_strut(win_id: int, width: int, height: int) -> Strut:
    return create_strut(win_id, top=height, top_end_x=width)


def create_bottom_strut(win_id: int, width: int, height: int) -> Strut:
    return create_strut(win_id, bottom=height, bottom_end_x=width)


def create_left_strut(win_id: int, width: int, height: int) -> Strut:
    return create_strut(win_id, left=width, left_end_y=height)


def create_right_strut(win_id: int, width: int, height: int) -> Strut:
    return create_strut(win_id, right=width, right_end_y=height)


window_width = window_height = 0


def setup_x11_window(win_id: int) -> None:
    if is_wayland():
        return
    try:
        func = globals()[f'create_{args.edge}_strut']
    except KeyError:
        raise SystemExit(f'The value {args.edge} is not support for --edge on X11')
    strut = func(win_id, window_width, window_height)
    make_x11_window_a_dock_window(win_id, strut)


def initial_window_size_func(opts: WindowSizeData, cached_values: dict[str, Any]) -> Callable[[int, int, float, float, float, float], tuple[int, int]]:

    def es(which: EdgeLiteral) -> float:
        return edge_spacing(which, opts)

    def initial_window_size(cell_width: int, cell_height: int, dpi_x: float, dpi_y: float, xscale: float, yscale: float) -> tuple[int, int]:
        if not is_macos and not is_wayland():
            # Not sure what the deal with scaling on X11 is
            xscale = yscale = 1
        global window_width, window_height
        monitor_width, monitor_height = glfw_primary_monitor_size()
        x = dual_distance(args.columns, min_cell_value_if_no_pixels=1)
        rwidth = x[1] if x[1] else (x[0] * cell_width / xscale)
        x = dual_distance(args.lines, min_cell_value_if_no_pixels=1)
        rheight = x[1] if x[1] else (x[0] * cell_width / yscale)

        if args.edge in {'left', 'right'}:
            spacing = es('left') + es('right')
            window_width = int(rwidth + (dpi_x / 72) * spacing + 1)
            window_height = monitor_height
        elif args.edge in {'top', 'bottom'}:
            spacing = es('top') + es('bottom')
            window_height = int(rheight + (dpi_y / 72) * spacing + 1)
            window_width = monitor_width
        elif args.edge in {'background', 'center'}:
            window_width, window_height = monitor_width, monitor_height
        else:
            x_spacing = es('left') + es('right')
            window_width = int(rwidth + (dpi_x / 72) * x_spacing + 1)
            y_spacing = es('top') + es('bottom')
            window_height = int(rheight + (dpi_y / 72) * y_spacing + 1)
        return window_width, window_height

    return initial_window_size


def dual_distance(spec: str, min_cell_value_if_no_pixels: int = 0) -> tuple[int, int]:
    with suppress(Exception):
        return int(spec), 0
    if spec.endswith('px'):
        return min_cell_value_if_no_pixels, int(spec[:-2])
    if spec.endswith('c'):
        return int(spec[:-1]), 0
    return min_cell_value_if_no_pixels, 0


def layer_shell_config(opts: PanelCLIOptions) -> LayerShellConfig:
    ltype = {
        'background': GLFW_LAYER_SHELL_BACKGROUND,
        'bottom': GLFW_LAYER_SHELL_PANEL,
        'top': GLFW_LAYER_SHELL_TOP,
        'overlay': GLFW_LAYER_SHELL_OVERLAY
    }.get(opts.layer, GLFW_LAYER_SHELL_PANEL)
    ltype = GLFW_LAYER_SHELL_BACKGROUND if opts.edge == 'background' else ltype
    edge = {
        'top': GLFW_EDGE_TOP, 'bottom': GLFW_EDGE_BOTTOM, 'left': GLFW_EDGE_LEFT, 'right': GLFW_EDGE_RIGHT, 'center': GLFW_EDGE_CENTER, 'none': GLFW_EDGE_NONE
    }.get(opts.edge, GLFW_EDGE_TOP)
    focus_policy = {
        'not-allowed': GLFW_FOCUS_NOT_ALLOWED, 'exclusive': GLFW_FOCUS_EXCLUSIVE, 'on-demand': GLFW_FOCUS_ON_DEMAND
    }.get(opts.focus_policy, GLFW_FOCUS_NOT_ALLOWED)
    x, y = dual_distance(opts.columns, min_cell_value_if_no_pixels=1), dual_distance(opts.lines, min_cell_value_if_no_pixels=1)
    return LayerShellConfig(type=ltype,
                            edge=edge,
                            x_size_in_cells=x[0], x_size_in_pixels=x[1],
                            y_size_in_cells=y[0], y_size_in_pixels=y[1],
                            requested_top_margin=max(0, opts.margin_top),
                            requested_left_margin=max(0, opts.margin_left),
                            requested_bottom_margin=max(0, opts.margin_bottom),
                            requested_right_margin=max(0, opts.margin_right),
                            focus_policy=focus_policy,
                            requested_exclusive_zone=opts.exclusive_zone,
                            override_exclusive_zone=opts.override_exclusive_zone,
                            output_name=opts.output_name or '')


def handle_single_instance_command(boss: BossType, sys_args: Sequence[str], environ: Mapping[str, str], notify_on_os_window_death: str | None = '') -> None:
    from kitty.tabs import SpecialWindow
    try:
        args, items = parse_panel_args(list(sys_args[1:]))
    except BaseException as e:
        log_error(f'Invalid arguments received over single instance socket: {sys_args} with error: {e}')
        return
    if args.toggle_visibility and boss.os_window_map:
        for os_window_id in boss.os_window_map:
            toggle_os_window_visibility(os_window_id)
        return
    items = items or [kitten_exe(), 'run-shell']
    lsc = layer_shell_config(args)
    os_window_id = boss.add_os_panel(lsc, args.cls, args.name)
    if notify_on_os_window_death:
        boss.os_window_death_actions[os_window_id] = partial(boss.notify_on_os_window_death, notify_on_os_window_death)
    tm = boss.os_window_map[os_window_id]
    tm.new_tab(SpecialWindow(cmd=items, env=dict(environ)))


def main(sys_args: list[str]) -> None:
    global args
    args, items = parse_panel_args(sys_args[1:])
    sys.argv = ['kitty']
    if args.debug_rendering:
        sys.argv.append('--debug-rendering')
    for config in args.config:
        sys.argv.extend(('--config', config))
    if not is_macos:
        sys.argv.extend(('--class', args.cls))
    if args.name:
        sys.argv.extend(('--name', args.name))
    if args.start_as_hidden:
        sys.argv.append('--start-as=hidden')
    for override in args.override:
        sys.argv.extend(('--override', override))
    sys.argv.append('--override=linux_display_server=auto')
    sys.argv.append('--override=macos_quit_when_last_window_closed=yes')
    sys.argv.append('--override=macos_hide_from_tasks=yes')
    sys.argv.append('--override=macos_window_resizable=no')
    if args.single_instance:
        sys.argv.append('--single-instance')
    if args.instance_group:
        sys.argv.append(f'--instance-group={args.instance_group}')
    if args.listen_on:
        sys.argv.append(f'--listen-on={args.listen_on}')

    sys.argv.extend(items)
    from kitty.main import main as real_main
    from kitty.main import run_app
    run_app.cached_values_name = 'panel'
    run_app.layer_shell_config = layer_shell_config(args)
    if not is_macos:
        run_app.first_window_callback = setup_x11_window
        run_app.initial_window_size_func = initial_window_size_func
    real_main(called_from_panel=True)


if __name__ == '__main__':
    main(sys.argv)
elif __name__ == '__doc__':
    cd: dict = sys.cli_docs  # type: ignore
    cd['usage'] = usage
    cd['options'] = panel_kitten_options_spec
    cd['help_text'] = help_text
    cd['short_desc'] = help_text