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path: root/src/caelestia/utils/scheme.py
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import json
import random
from pathlib import Path

from caelestia.utils.material import get_colours_for_image
from caelestia.utils.notify import notify
from caelestia.utils.paths import atomic_dump, scheme_data_dir, scheme_path


class Scheme:
    _name: str
    _flavour: str
    _mode: str
    _variant: str
    _colours: dict[str, str]
    notify: bool

    def __init__(self, json: dict[str, any] | None) -> None:
        if json is None:
            self._name = "catppuccin"
            self._flavour = "mocha"
            self._mode = "dark"
            self._variant = "tonalspot"
            self._colours = read_colours_from_file(self.get_colours_path())
        else:
            self._name = json["name"]
            self._flavour = json["flavour"]
            self._mode = json["mode"]
            self._variant = json["variant"]
            self._colours = json["colours"]
        self.notify = False

    @property
    def name(self) -> str:
        return self._name

    @name.setter
    def name(self, name: str) -> None:
        if name == self._name:
            return

        if name not in get_scheme_names():
            if self.notify:
                notify(
                    "-u",
                    "critical",
                    "Unable to set scheme",
                    f'"{name}" is not a valid scheme.\nValid schemes are: {get_scheme_names()}',
                )
            raise ValueError(f"Invalid scheme name: {name}")

        self._name = name
        self._check_flavour()
        self._check_mode()
        self._update_colours()
        self.save()

    @property
    def flavour(self) -> str:
        return self._flavour

    @flavour.setter
    def flavour(self, flavour: str) -> None:
        if flavour == self._flavour:
            return

        if flavour not in get_scheme_flavours():
            if self.notify:
                notify(
                    "-u",
                    "critical",
                    "Unable to set scheme flavour",
                    f'"{flavour}" is not a valid flavour of scheme "{self.name}".\n'
                    f"Valid flavours are: {get_scheme_flavours()}",
                )
            raise ValueError(f'Invalid scheme flavour: "{flavour}". Valid flavours: {get_scheme_flavours()}')

        self._flavour = flavour
        self._check_mode()
        self.update_colours()

    @property
    def mode(self) -> str:
        return self._mode

    @mode.setter
    def mode(self, mode: str) -> None:
        if mode == self._mode:
            return

        if mode not in get_scheme_modes():
            if self.notify:
                notify(
                    "-u",
                    "critical",
                    "Unable to set scheme mode",
                    f'Scheme "{self.name} {self.flavour}" does not have a {mode} mode.',
                )
            raise ValueError(f'Invalid scheme mode: "{mode}". Valid modes: {get_scheme_modes()}')

        self._mode = mode
        self.update_colours()

    @property
    def variant(self) -> str:
        return self._variant

    @variant.setter
    def variant(self, variant: str) -> None:
        if variant == self._variant:
            return

        self._variant = variant
        self.update_colours()

    @property
    def colours(self) -> dict[str, str]:
        return self._colours

    def get_colours_path(self) -> Path:
        return (scheme_data_dir / self.name / self.flavour / self.mode).with_suffix(".txt")

    def save(self) -> None:
        scheme_path.parent.mkdir(parents=True, exist_ok=True)
        atomic_dump(
            scheme_path,
            {
                "name": self.name,
                "flavour": self.flavour,
                "mode": self.mode,
                "variant": self.variant,
                "colours": self.colours,
            },
        )

    def set_random(self) -> None:
        self._name = random.choice(get_scheme_names())
        self._flavour = random.choice(get_scheme_flavours())
        self._mode = random.choice(get_scheme_modes())
        self.update_colours()

    def update_colours(self) -> None:
        self._update_colours()
        self.save()

    def _check_flavour(self) -> None:
        global scheme_flavours
        scheme_flavours = None
        if self._flavour not in get_scheme_flavours(self.name):
            self._flavour = get_scheme_flavours()[0]

    def _check_mode(self) -> None:
        global scheme_modes
        scheme_modes = None
        if self._mode not in get_scheme_modes(self.name, self.flavour):
            self._mode = get_scheme_modes()[0]

    def _update_colours(self) -> None:
        if self.name == "dynamic":
            try:
                self._colours = get_colours_for_image()
            except FileNotFoundError:
                if self.notify:
                    notify(
                        "-u",
                        "critical",
                        "Unable to set dynamic scheme",
                        "No wallpaper set. Please set a wallpaper via `caelestia wallpaper` before setting a dynamic scheme.",
                    )
                raise ValueError(
                    "No wallpaper set. Please set a wallpaper via `caelestia wallpaper` before setting a dynamic scheme."
                )
        else:
            self._colours = read_colours_from_file(self.get_colours_path())

    def __str__(self) -> str:
        return (
            f"Current scheme:\n"
            f"    Name: {self.name}\n"
            f"    Flavour: {self.flavour}\n"
            f"    Mode: {self.mode}\n"
            f"    Variant: {self.variant}\n"
            f"    Colours:\n"
            f"        {'\n        '.join(f'{n}: \x1b[38;2;{int(c[0:2], 16)};{int(c[2:4], 16)};{int(c[4:6], 16)}m{c}\x1b[0m' for n, c in self.colours.items())}"
        )


scheme_variants = [
    "tonalspot",
    "vibrant",
    "expressive",
    "fidelity",
    "fruitsalad",
    "monochrome",
    "neutral",
    "rainbow",
    "content",
]

scheme_names: list[str] = None
scheme_flavours: list[str] = None
scheme_modes: list[str] = None

scheme: Scheme = None


def read_colours_from_file(path: Path) -> dict[str, str]:
    return {k.strip(): v.strip() for k, v in (line.split(" ") for line in path.read_text().splitlines())}


def get_scheme_path() -> Path:
    return get_scheme().get_colours_path()


def get_scheme() -> Scheme:
    global scheme

    if scheme is None:
        try:
            scheme_json = json.loads(scheme_path.read_text())
            scheme = Scheme(scheme_json)
        except (IOError, json.JSONDecodeError):
            scheme = Scheme(None)

    return scheme


def get_scheme_names() -> list[str]:
    global scheme_names

    if scheme_names is None:
        scheme_names = [f.name for f in scheme_data_dir.iterdir() if f.is_dir()]
        scheme_names.append("dynamic")

    return scheme_names


def get_scheme_flavours(name: str = None) -> list[str]:
    if name is not None:
        if name == "dynamic":
            return ["default"]
        else:
            return [f.name for f in (scheme_data_dir / name).iterdir() if f.is_dir()]

    global scheme_flavours

    if scheme_flavours is None:
        name = get_scheme().name
        if name == "dynamic":
            scheme_flavours = ["default"]
        else:
            scheme_flavours = [f.name for f in (scheme_data_dir / name).iterdir() if f.is_dir()]

    return scheme_flavours


def get_scheme_modes(name: str = None, flavour: str = None) -> list[str]:
    if name is not None:
        if name == "dynamic":
            return ["light", "dark"]
        else:
            return [f.stem for f in (scheme_data_dir / name / flavour).iterdir() if f.is_file()]

    global scheme_modes

    if scheme_modes is None:
        scheme = get_scheme()
        if scheme.name == "dynamic":
            scheme_modes = ["light", "dark"]
        else:
            scheme_modes = [f.stem for f in (scheme_data_dir / scheme.name / scheme.flavour).iterdir() if f.is_file()]

    return scheme_modes