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from itertools import zip_longest
from typing import (
    TYPE_CHECKING,
    Iterable,
    Iterator,
    List,
    Optional,
    TypeVar,
    Union,
    overload,
)

if TYPE_CHECKING:
    from .console import (
        Console,
        ConsoleOptions,
        JustifyMethod,
        OverflowMethod,
        RenderResult,
        RenderableType,
    )
    from .text import Text

from .cells import cell_len
from .measure import Measurement

T = TypeVar("T")


class Renderables:
    """A list subclass which renders its contents to the console."""

    def __init__(
        self, renderables: Optional[Iterable["RenderableType"]] = None
    ) -> None:
        self._renderables: List["RenderableType"] = (
            list(renderables) if renderables is not None else []
        )

    def __rich_console__(
        self, console: "Console", options: "ConsoleOptions"
    ) -> "RenderResult":
        """Console render method to insert line-breaks."""
        yield from self._renderables

    def __rich_measure__(
        self, console: "Console", options: "ConsoleOptions"
    ) -> "Measurement":
        dimensions = [
            Measurement.get(console, options, renderable)
            for renderable in self._renderables
        ]
        if not dimensions:
            return Measurement(1, 1)
        _min = max(dimension.minimum for dimension in dimensions)
        _max = max(dimension.maximum for dimension in dimensions)
        return Measurement(_min, _max)

    def append(self, renderable: "RenderableType") -> None:
        self._renderables.append(renderable)

    def __iter__(self) -> Iterable["RenderableType"]:
        return iter(self._renderables)


class Lines:
    """A list subclass which can render to the console."""

    def __init__(self, lines: Iterable["Text"] = ()) -> None:
        self._lines: List["Text"] = list(lines)

    def __repr__(self) -> str:
        return f"Lines({self._lines!r})"

    def __iter__(self) -> Iterator["Text"]:
        return iter(self._lines)

    @overload
    def __getitem__(self, index: int) -> "Text":
        ...

    @overload
    def __getitem__(self, index: slice) -> List["Text"]:
        ...

    def __getitem__(self, index: Union[slice, int]) -> Union["Text", List["Text"]]:
        return self._lines[index]

    def __setitem__(self, index: int, value: "Text") -> "Lines":
        self._lines[index] = value
        return self

    def __len__(self) -> int:
        return self._lines.__len__()

    def __rich_console__(
        self, console: "Console", options: "ConsoleOptions"
    ) -> "RenderResult":
        """Console render method to insert line-breaks."""
        yield from self._lines

    def append(self, line: "Text") -> None:
        self._lines.append(line)

    def extend(self, lines: Iterable["Text"]) -> None:
        self._lines.extend(lines)

    def pop(self, index: int = -1) -> "Text":
        return self._lines.pop(index)

    def justify(
        self,
        console: "Console",
        width: int,
        justify: "JustifyMethod" = "left",
        overflow: "OverflowMethod" = "fold",
    ) -> None:
        """Justify and overflow text to a given width.

        Args:
            console (Console): Console instance.
            width (int): Number of cells available per line.
            justify (str, optional): Default justify method for text: "left", "center", "full" or "right". Defaults to "left".
            overflow (str, optional): Default overflow for text: "crop", "fold", or "ellipsis". Defaults to "fold".

        """
        from .text import Text

        if justify == "left":
            for line in self._lines:
                line.truncate(width, overflow=overflow, pad=True)
        elif justify == "center":
            for line in self._lines:
                line.rstrip()
                line.truncate(width, overflow=overflow)
                line.pad_left((width - cell_len(line.plain)) // 2)
                line.pad_right(width - cell_len(line.plain))
        elif justify == "right":
            for line in self._lines:
                line.rstrip()
                line.truncate(width, overflow=overflow)
                line.pad_left(width - cell_len(line.plain))
        elif justify == "full":
            for line_index, line in enumerate(self._lines):
                if line_index == len(self._lines) - 1:
                    break
                words = line.split(" ")
                words_size = sum(cell_len(word.plain) for word in words)
                num_spaces = len(words) - 1
                spaces = [1 for _ in range(num_spaces)]
                index = 0
                if spaces:
                    while words_size + num_spaces < width:
                        spaces[len(spaces) - index - 1] += 1
                        num_spaces += 1
                        index = (index + 1) % len(spaces)
                tokens: List[Text] = []
                for index, (word, next_word) in enumerate(
                    zip_longest(words, words[1:])
                ):
                    tokens.append(word)
                    if index < len(spaces):
                        style = word.get_style_at_offset(console, -1)
                        next_style = next_word.get_style_at_offset(console, 0)
                        space_style = style if style == next_style else line.style
                        tokens.append(Text(" " * spaces[index], style=space_style))
                self[line_index] = Text("").join(tokens)