#!/usr/bin/env python
# License: GPLv3 Copyright: 2020, Kovid Goyal <kovid at kovidgoyal.net>


from typing import TYPE_CHECKING, Dict, Optional

from kitty.cli import emph
from kitty.fast_data_types import Color

from .base import (
    MATCH_TAB_OPTION,
    MATCH_WINDOW_OPTION,
    ArgsType,
    Boss,
    ParsingOfArgsFailed,
    PayloadGetType,
    PayloadType,
    RCOptions,
    RemoteCommand,
    ResponseType,
    Window,
)

if TYPE_CHECKING:
    from kitty.cli_stub import SetColorsRCOptions as CLIOptions


class SetColors(RemoteCommand):

    protocol_spec = __doc__ = '''
    colors+/dict.colors: An object mapping names to colors as 24-bit RGB integers or null for nullable colors. Or a string for transparent_background_colors.
    match_window/str: Window to change colors in
    match_tab/str: Tab to change colors in
    all/bool: Boolean indicating change colors everywhere or not
    configured/bool: Boolean indicating whether to change the configured colors. Must be True if reset is True
    reset/bool: Boolean indicating colors should be reset to startup values
    '''

    short_desc = 'Set terminal colors'
    desc = (
        'Set the terminal colors for the specified windows/tabs (defaults to active window).'
        ' You can either specify the path to a conf file'
        ' (in the same format as :file:`kitty.conf`) to read the colors from or you can specify individual colors,'
        ' for example::\n\n'
        '    kitten @ set-colors foreground=red background=white'
    )
    options_spec = '''\
--all -a
type=bool-set
By default, colors are only changed for the currently active window. This option will
cause colors to be changed in all windows.


--configured -c
type=bool-set
Also change the configured colors (i.e. the colors kitty will use for new
windows or after a reset).


--reset
type=bool-set
Restore all colors to the values they had at kitty startup. Note that if you specify
this option, any color arguments are ignored and :option:`kitten @ set-colors --configured` and :option:`kitten @ set-colors --all` are implied.
''' + '\n\n' + MATCH_WINDOW_OPTION + '\n\n' + MATCH_TAB_OPTION.replace('--match -m', '--match-tab -t')
    args = RemoteCommand.Args(spec='COLOR_OR_FILE ...', json_field='colors', special_parse='parse_colors_and_files(args)',
                              completion=RemoteCommand.CompletionSpec.from_string('type:file group:"CONF files", ext:conf'))

    def message_to_kitty(self, global_opts: RCOptions, opts: 'CLIOptions', args: ArgsType) -> PayloadType:
        final_colors: Dict[str, int | None | str] = {}
        transparent_background_colors: tuple[tuple[Color, float], ...] = ()
        from kitty.colors import parse_colors
        if not opts.reset:
            try:
                fc, transparent_background_colors = parse_colors(args)
            except FileNotFoundError as err:
                raise ParsingOfArgsFailed(f'The colors configuration file {emph(err.filename)} was not found.') from err
            except Exception as err:
                raise ParsingOfArgsFailed(str(err)) from err
            final_colors.update(fc)
        if transparent_background_colors:
            final_colors['transparent_background_colors'] = ' '.join(f'{c.as_sharp}@{f}' for c, f in transparent_background_colors)
        ans = {
            'match_window': opts.match, 'match_tab': opts.match_tab,
            'all': opts.all or opts.reset, 'configured': opts.configured or opts.reset,
            'colors': final_colors, 'reset': opts.reset,
        }
        return ans

    def response_from_kitty(self, boss: Boss, window: Optional[Window], payload_get: PayloadGetType) -> ResponseType:
        from kitty.colors import patch_colors
        windows = self.windows_for_payload(boss, window, payload_get)
        colors: Dict[str, int | None] = payload_get('colors') or {}
        if payload_get('reset'):
            colors = {k: None if v is None else int(v) for k, v in boss.color_settings_at_startup.items()}
        tbc = colors.get('transparent_background_colors')
        if tbc:
            from kitty.options.utils import transparent_background_colors
            parsed_tbc = transparent_background_colors(str(tbc))
        else:
            parsed_tbc = ()
        patch_colors(colors, parsed_tbc, bool(payload_get('configured')), windows=windows)
        return None


set_colors = SetColors()
