"""A textarea component."""
from __future__ import annotations

from typing import Any, Union

from reflex.components.component import Component
from reflex.components.forms.debounce import DebounceInput
from reflex.components.libs.chakra import ChakraComponent
from reflex.constants import EventTriggers
from reflex.vars import Var


class TextArea(ChakraComponent):
    """A text area component."""

    tag = "Textarea"

    # State var to bind the input.
    value: Var[str]

    # The default value of the textarea.
    default_value: Var[str]

    # The placeholder text.
    placeholder: Var[str]

    # The border color when the input is invalid.
    error_border_color: Var[str]

    # The border color when the input is focused.
    focus_border_color: Var[str]

    # If true, the form control will be disabled.
    is_disabled: Var[bool]

    # If true, the form control will be invalid.
    is_invalid: Var[bool]

    # If true, the form control will be read-only.
    is_read_only: Var[bool]

    # If true, the form control will be required.
    is_required: Var[bool]

    # "outline" | "filled" | "flushed" | "unstyled"
    variant: Var[str]

    def get_event_triggers(self) -> dict[str, Union[Var, Any]]:
        """Get the event triggers that pass the component's value to the handler.

        Returns:
            A dict mapping the event trigger to the var that is passed to the handler.
        """
        return {
            **super().get_event_triggers(),
            EventTriggers.ON_CHANGE: lambda e0: [e0.target.value],
            EventTriggers.ON_FOCUS: lambda e0: [e0.target.value],
            EventTriggers.ON_BLUR: lambda e0: [e0.target.value],
            EventTriggers.ON_KEY_DOWN: lambda e0: [e0.key],
            EventTriggers.ON_KEY_UP: lambda e0: [e0.key],
        }

    @classmethod
    def create(cls, *children, **props) -> Component:
        """Create an Input component.

        Args:
            *children: The children of the component.
            **props: The properties of the component.

        Returns:
            The component.
        """
        if (
            isinstance(props.get("value"), Var) and props.get("on_change")
        ) or "debounce_timeout" in props:
            # Currently default to 50ms, which appears to be a good balance
            debounce_timeout = props.pop("debounce_timeout", 50)
            # create a debounced input if the user requests full control to avoid typing jank
            return DebounceInput.create(
                super().create(*children, **props), debounce_timeout=debounce_timeout
            )
        return super().create(*children, **props)