from __future__ import annotations

import warnings
from typing import TYPE_CHECKING, Literal

from gradio_client.documentation import document, set_documentation_group

from gradio.blocks import BlockContext
from gradio.deprecation import warn_deprecation, warn_style_method_deprecation
from gradio.events import Changeable, Selectable

if TYPE_CHECKING:
    from gradio.blocks import Block

set_documentation_group("layout")


@document()
class Row(BlockContext):
    """
    Row is a layout element within Blocks that renders all children horizontally.
    Example:
        with gr.Blocks() as demo:
            with gr.Row():
                gr.Image("lion.jpg", scale=2)
                gr.Image("tiger.jpg", scale=1)
        demo.launch()
    Guides: controlling-layout
    """

    def __init__(
        self,
        *,
        variant: Literal["default", "panel", "compact"] = "default",
        visible: bool = True,
        elem_id: str | None = None,
        equal_height: bool = True,
        **kwargs,
    ):
        """
        Parameters:
            variant: row type, 'default' (no background), 'panel' (gray background color and rounded corners), or 'compact' (rounded corners and no internal gap).
            visible: If False, row will be hidden.
            elem_id: An optional string that is assigned as the id of this component in the HTML DOM. Can be used for targeting CSS styles.
            equal_height: If True, makes every child element have equal height
        """
        self.variant = variant
        self.equal_height = equal_height
        if variant == "compact":
            self.allow_expected_parents = False
        super().__init__(visible=visible, elem_id=elem_id, **kwargs)

    def get_config(self):
        return {
            "type": "row",
            "variant": self.variant,
            "equal_height": self.equal_height,
            **super().get_config(),
        }

    @staticmethod
    def update(
        visible: bool | None = None,
    ):
        return {
            "visible": visible,
            "__type__": "update",
        }

    def style(
        self,
        *,
        equal_height: bool | None = None,
        **kwargs,
    ):
        """
        Styles the Row.
        Parameters:
            equal_height: If True, makes every child element have equal height
        """
        warn_style_method_deprecation()
        if equal_height is not None:
            self.equal_height = equal_height
        return self


@document()
class Column(BlockContext):
    """
    Column is a layout element within Blocks that renders all children vertically. The widths of columns can be set through the `scale` and `min_width` parameters.
    If a certain scale results in a column narrower than min_width, the min_width parameter will win.
    Example:
        with gr.Blocks() as demo:
            with gr.Row():
                with gr.Column(scale=1):
                    text1 = gr.Textbox()
                    text2 = gr.Textbox()
                with gr.Column(scale=4):
                    btn1 = gr.Button("Button 1")
                    btn2 = gr.Button("Button 2")
    Guides: controlling-layout
    """

    def __init__(
        self,
        *,
        scale: int = 1,
        min_width: int = 320,
        variant: Literal["default", "panel", "compact"] = "default",
        visible: bool = True,
        elem_id: str | None = None,
        **kwargs,
    ):
        """
        Parameters:
            scale: relative width compared to adjacent Columns. For example, if Column A has scale=2, and Column B has scale=1, A will be twice as wide as B.
            min_width: minimum pixel width of Column, will wrap if not sufficient screen space to satisfy this value. If a certain scale value results in a column narrower than min_width, the min_width parameter will be respected first.
            variant: column type, 'default' (no background), 'panel' (gray background color and rounded corners), or 'compact' (rounded corners and no internal gap).
            visible: If False, column will be hidden.
            elem_id: An optional string that is assigned as the id of this component in the HTML DOM. Can be used for targeting CSS styles.
        """
        if scale != round(scale):
            warn_deprecation(
                f"'scale' value should be an integer. Using {scale} will cause issues."
            )

        self.scale = scale
        self.min_width = min_width
        self.variant = variant
        if variant == "compact":
            self.allow_expected_parents = False
        super().__init__(visible=visible, elem_id=elem_id, **kwargs)

    def get_config(self):
        return {
            "type": "column",
            "variant": self.variant,
            "scale": self.scale,
            "min_width": self.min_width,
            **super().get_config(),
        }

    @staticmethod
    def update(
        variant: str | None = None,
        visible: bool | None = None,
    ):
        return {
            "variant": variant,
            "visible": visible,
            "__type__": "update",
        }


class Tabs(BlockContext, Changeable, Selectable):
    """
    Tabs is a layout element within Blocks that can contain multiple "Tab" Components.
    """

    def __init__(
        self,
        *,
        selected: int | str | None = None,
        visible: bool = True,
        elem_id: str | None = None,
        **kwargs,
    ):
        """
        Parameters:
            selected: The currently selected tab. Must correspond to an id passed to the one of the child TabItems. Defaults to the first TabItem.
            visible: If False, Tabs will be hidden.
            elem_id: An optional string that is assigned as the id of this component in the HTML DOM. Can be used for targeting CSS styles.
        """
        BlockContext.__init__(self, visible=visible, elem_id=elem_id, **kwargs)
        Changeable.__init__(self)
        Selectable.__init__(self)
        self.selected = selected

    def get_config(self):
        return {"selected": self.selected, **super(BlockContext, self).get_config()}

    @staticmethod
    def update(
        selected: int | str | None = None,
    ):
        return {
            "selected": selected,
            "__type__": "update",
        }


@document()
class Tab(BlockContext, Selectable):
    """
    Tab (or its alias TabItem) is a layout element. Components defined within the Tab will be visible when this tab is selected tab.
    Example:
        with gr.Blocks() as demo:
            with gr.Tab("Lion"):
                gr.Image("lion.jpg")
                gr.Button("New Lion")
            with gr.Tab("Tiger"):
                gr.Image("tiger.jpg")
                gr.Button("New Tiger")
    Guides: controlling-layout
    """

    def __init__(
        self,
        label: str,
        *,
        id: int | str | None = None,
        elem_id: str | None = None,
        **kwargs,
    ):
        """
        Parameters:
            label: The visual label for the tab
            id: An optional identifier for the tab, required if you wish to control the selected tab from a predict function.
            elem_id: An optional string that is assigned as the id of this component in the HTML DOM. Can be used for targeting CSS styles.
        """
        BlockContext.__init__(self, elem_id=elem_id, **kwargs)
        Selectable.__init__(self)
        self.label = label
        self.id = id

    def get_config(self):
        return {
            "label": self.label,
            "id": self.id,
            **super(BlockContext, self).get_config(),
        }

    def get_expected_parent(self) -> type[Tabs]:
        return Tabs

    def get_block_name(self):
        return "tabitem"


TabItem = Tab


@document()
class Group(BlockContext):
    """
    Group is a layout element within Blocks which groups together children so that
    they do not have any padding or margin between them.
    Example:
        with gr.Group():
            gr.Textbox(label="First")
            gr.Textbox(label="Last")
    """

    def __init__(
        self,
        *,
        visible: bool = True,
        elem_id: str | None = None,
        **kwargs,
    ):
        """
        Parameters:
            visible: If False, group will be hidden.
            elem_id: An optional string that is assigned as the id of this component in the HTML DOM. Can be used for targeting CSS styles.
        """
        super().__init__(visible=visible, elem_id=elem_id, **kwargs)

    def get_config(self):
        return {"type": "group", **super().get_config()}

    @staticmethod
    def update(
        visible: bool | None = None,
    ):
        return {
            "visible": visible,
            "__type__": "update",
        }


class Box(BlockContext):
    """
    DEPRECATED.
    Box is a a layout element which places children in a box with rounded corners and
    some padding around them.
    Example:
        with gr.Box():
            gr.Textbox(label="First")
            gr.Textbox(label="Last")
    """

    def __init__(
        self,
        *,
        visible: bool = True,
        elem_id: str | None = None,
        **kwargs,
    ):
        """
        Parameters:
            visible: If False, box will be hidden.
            elem_id: An optional string that is assigned as the id of this component in the HTML DOM. Can be used for targeting CSS styles.
        """
        warnings.warn("gr.Box is deprecated. Use gr.Group instead.", DeprecationWarning)
        super().__init__(visible=visible, elem_id=elem_id, **kwargs)

    def get_config(self):
        return {"type": "box", **super().get_config()}

    @staticmethod
    def update(
        visible: bool | None = None,
    ):
        return {
            "visible": visible,
            "__type__": "update",
        }

    def style(self, **kwargs):
        warn_style_method_deprecation()
        return self


class Form(BlockContext):
    def __init__(self, *, scale: int = 0, min_width: int = 0, **kwargs):
        """
        Parameters:
            scale: relative width compared to adjacent Columns. For example, if Column A has scale=2, and Column B has scale=1, A will be twice as wide as B.
            min_width: minimum pixel width of Column, will wrap if not sufficient screen space to satisfy this value. If a certain scale value results in a column narrower than min_width, the min_width parameter will be respected first.
        """
        self.scale = scale
        self.min_width = min_width
        super().__init__(**kwargs)

    def add_child(self, child: Block):
        if isinstance(self.parent, Row):
            scale = getattr(child, "scale", None)
            self.scale += 1 if scale is None else scale
            self.min_width += getattr(child, "min_width", 0) or 0
        super().add_child(child)

    def get_config(self):
        return {
            "type": "form",
            "scale": self.scale,
            "min_width": self.min_width,
            **super().get_config(),
        }


@document()
class Accordion(BlockContext):
    """
    Accordion is a layout element which can be toggled to show/hide the contained content.
    Example:
        with gr.Accordion("See Details"):
            gr.Markdown("lorem ipsum")
    """

    def __init__(
        self,
        label,
        *,
        open: bool = True,
        visible: bool = True,
        elem_id: str | None = None,
        **kwargs,
    ):
        """
        Parameters:
            label: name of accordion section.
            open: if True, accordion is open by default.
            elem_id: An optional string that is assigned as the id of this component in the HTML DOM. Can be used for targeting CSS styles.
        """
        self.label = label
        self.open = open
        super().__init__(visible=visible, elem_id=elem_id, **kwargs)

    def get_config(self):
        return {
            "type": "accordion",
            "open": self.open,
            "label": self.label,
            **super().get_config(),
        }

    @staticmethod
    def update(
        open: bool | None = None,
        label: str | None = None,
        visible: bool | None = None,
    ):
        return {
            "visible": visible,
            "label": label,
            "open": open,
            "__type__": "update",
        }