"""
Open in editor key bindings.
"""
from prot.prompt.filters import emacs_mode, has_selection, vi_navigation_mode

from ..key_bindings import KeyBindings, KeyBindingsBase, merge_key_bindings
from .named_commands import get_by_name

__all__ = [
    "load_open_in_editor_bindings",
    "load_emacs_open_in_editor_bindings",
    "load_vi_open_in_editor_bindings",
]


def load_open_in_editor_bindings() -> KeyBindingsBase:
    """
    Load both the Vi and emacs key bindings for handling edit-and-execute-command.
    """
    return merge_key_bindings(
        [load_emacs_open_in_editor_bindings(), load_vi_open_in_editor_bindings(),]
    )


def load_emacs_open_in_editor_bindings() -> KeyBindings:
    """
    Pressing C-X C-E will open the buffer in an external editor.
    """
    key_bindings = KeyBindings()

    key_bindings.add("c-x", "c-e", filter=emacs_mode & ~has_selection)(
        get_by_name("edit-and-execute-command")
    )

    return key_bindings


def load_vi_open_in_editor_bindings() -> KeyBindings:
    """
    Pressing 'v' in navigation mode will open the buffer in an external editor.
    """
    key_bindings = KeyBindings()
    key_bindings.add("v", filter=vi_navigation_mode)(
        get_by_name("edit-and-execute-command")
    )
    return key_bindings
