"""
Scene
    - Create a scene, add root and inset if necessary
    - add actor method
    - special methods

"""
import sys
from pathlib import Path
from vedo import Mesh, Plane, Text2D, Assembly
import pyinspect as pi
from rich import print
from loguru import logger
from myterial import amber, orange, orange_darker, salmon

from brainrender import settings
from brainrender.atlas import Atlas
from brainrender.render import Render
from brainrender.actor import Actor
from brainrender.actors import Volume
from brainrender._utils import return_list_smart, listify
from brainrender._io import load_mesh_from_file
from brainrender._jupyter import not_on_jupyter, JupyterMixIn


class Scene(JupyterMixIn, Render):
    def __init__(
        self,
        root=True,
        atlas_name=None,
        inset=True,
        title=None,
        screenshots_folder=None,
    ):
        """
        Main scene in brainrender.
        It coordinates what should be render and how should it look like.

        :param root: bool. If true the brain root mesh is added
        :param atlas_name: str, name of the brainglobe atlas to be used
        :param inset: bool. If true an inset is shown with the brain's outline
        :param title: str. If true a title is added to the top of the window
        :param screenshots_folder: str, Path. Where the screenshots will be saved
        """
        logger.debug(
            f"Creating scene with parameters: root: {root}, atlas_name: '{atlas_name}'', inset: {inset}, screenshots_folder: {screenshots_folder}"
        )
        JupyterMixIn.__init__(self)

        self.actors = []  # stores all actors in the scene
        self.labels = []  # stores all `labels` actors in scene

        self.atlas = Atlas(atlas_name=atlas_name)

        self.screenshots_folder = (
            Path(screenshots_folder)
            if screenshots_folder is not None
            else Path().cwd()
        )
        self.screenshots_folder.mkdir(exist_ok=True)

        # Initialise render class
        Render.__init__(self)

        # Get root mesh
        self.root = self.add_brain_region(
            "root",
            alpha=settings.ROOT_ALPHA,
            color=settings.ROOT_COLOR,
            silhouette=True
            if root and settings.SHADER_STYLE == "cartoon"
            else False,
        )
        self.atlas.root = self.root  # give atlas access to root
        self._root_mesh = self.root.mesh.clone()
        if not root:
            self.remove(self.root)

        # keep track if we need to make an inset
        self.inset = inset

        # add title
        if title:
            self.add(
                Text2D(title, pos="top-center", s=2.5, c="k", alpha=1),
                names="title",
                classes="title",
            )

    def __str__(self):
        return f"A `brainrender.scene.Scene` with {len(self.actors)} actors."

    def __repr__(self):  # pragma: no cover
        return f"A `brainrender.scene.Scene` with {len(self.actors)} actors."

    def __repr_html__(self):  # pragma: no cover
        return f"A `brainrender.scene.Scene` with {len(self.actors)} actors."

    def __del__(self):
        self.close()

    @not_on_jupyter
    def _get_inset(self):
        """
        Creates a small inset showing the brain's orientation
        """
        if settings.OFFSCREEN:
            return None

        inset = self._root_mesh.clone()
        inset.alpha(1)  # scale(0.5)
        self.plotter.addInset(inset, pos=(0.95, 0.1), draggable=False)

        if settings.SHADER_STYLE == "cartoon":
            inset.lighting("off")

    def add(self, *items, names=None, classes=None, transform=True, **kwargs):
        """
        General method to add Actors to the scene.

        :param items: vedo.Mesh, Actor, (str, Path).
                If str/path it should be a path to a .obj or .stl file.
                Whatever the input it's turned into an instance of Actor
                before adding it to the scne

        :param names: names to be assigned to the Actors
        :param classs: br_classes to be assigned to the Actors
        :param **kwargs: parameters to be passed to the individual
            loading functions (e.g. to load from file and specify the color)
        """
        names = names or [None for a in items]
        classes = classes or [None for a in items]

        # turn items into Actors
        actors = []
        for item, name, _class in zip(items, listify(names), listify(classes)):
            if item is None:
                continue

            if isinstance(item, (Mesh, Assembly)):
                actors.append(Actor(item, name=name, br_class=_class))

            elif isinstance(item, Text2D):
                # Mark text actors differently because they don't behave like
                # other 3d actors
                actors.append(
                    Actor(
                        item,
                        name=name,
                        br_class=_class,
                        is_text=True,
                        **kwargs,
                    )
                )
            elif pi.utils._class_name(item) == "Volume" and not isinstance(
                item, Volume
            ):
                actors.append(
                    Volume(item, name=name, br_class=_class, **kwargs)
                )
            elif isinstance(item, Actor):
                actors.append(item)

            elif isinstance(item, (str, Path)):
                mesh = load_mesh_from_file(item, **kwargs)
                name = name or Path(item).name
                _class = _class or "from file"
                actors.append(Actor(mesh, name=name, br_class=_class))

            else:
                raise ValueError(
                    f"Unrecognized argument: {item} [{pi.utils._class_name(item)}]"
                )

        # transform actors
        if transform:
            for actor in actors:
                self._prepare_actor(actor)

        # add actors to plotter
        for actor in actors:
            try:
                self.plotter.add(actor._mesh)
            except AttributeError:  # e.g. for titles
                self.plotter.add(actor.mesh)

        # Add to the lists actors
        self.actors.extend(actors)
        return return_list_smart(actors)

    def remove(self, *actors):
        """
        Removes actors from the scene.
        """
        logger.debug(f"Removing {len(actors)} actors from scene")
        for act in actors:
            try:
                self.actors.pop(self.actors.index(act))
            except Exception:
                print(
                    f"Could not remove ({act}, {pi.utils._class_name(act)}) from actors"
                )
            else:
                # remove from plotter
                try:
                    self.plotter.remove(act._mesh)
                except AttributeError:
                    pass

                if act.silhouette is not None:
                    self.plotter.remove(act.silhouette.mesh)

                for label in act.labels:
                    self.plotter.remove(label.mesh)

    def get_actors(self, name=None, br_class=None):
        """
        Return's the scene's actors that match some search criteria.

        :param name: strm int or list of str/int, actors' names
        :param br_class: str or list of str, actors br classes
        """
        matches = self.actors
        if name is not None:
            name = listify(name)
            matches = [m for m in matches if m.name in name]
        if br_class is not None:
            br_class = listify(br_class)
            matches = [m for m in matches if m.br_class in br_class]
        return matches

    def add_brain_region(
        self,
        *regions,
        alpha=1,
        color=None,
        silhouette=None,
        hemisphere="both",
        force=False,
    ):
        """
        Dedicated method to add brain regions to render

        :param regions: str. String of regions names
        :param alpha: float
        :param color: str. If None the atlas default color is used
        :param silhouette: bool. If true regions Actors will have
            a silhouette
        :param hemisphere: str.
            - if "both" the complete mesh is returned
            - if "left"/"right" only the corresponding half
                of the mesh is returned
        :param force: force adding of region even if already rendred
        """
        if silhouette is None:
            silhouette = (
                silhouette or True
                if settings.SHADER_STYLE == "cartoon"
                else False
            )

        # avoid adding regions already rendered
        if not force:
            already_in = [
                r.name for r in self.get_actors(br_class="brain region")
            ]
            regions = [r for r in regions if r not in already_in]

        if not regions:  # they were all already rendered
            logger.debug(
                "Not adding any region because they are all already in the scene"
            )
            return None

        logger.debug(
            f"SCENE: Adding {len(regions)} brain regions to scene: {regions}"
        )

        # get regions actors from atlas
        regions = self.atlas.get_region(*regions, alpha=alpha, color=color)
        regions = listify(regions) or []

        # add actors
        if silhouette and regions and alpha:
            self.add_silhouette(*regions)

        actors = self.add(*regions)

        # slice
        if hemisphere == "right":
            plane = self.atlas.get_plane(
                pos=self.root._mesh.centerOfMass(), norm=(0, 0, 1)
            )
        elif hemisphere == "left":
            plane = self.atlas.get_plane(
                pos=self.root._mesh.centerOfMass(), norm=(0, 0, -1)
            )

        if hemisphere in ("left", "right"):
            self.slice(plane, actors=actors, close_actors=True)
        return actors

    @not_on_jupyter
    def add_silhouette(self, *actors, lw=1, color="k"):
        """
        Dedicated method to add silhouette to actors

        :param actors: Actors
        :param lw: float. Line weight
        :param color: str, silhouette color
        """
        for actor in actors:
            if actor is None:
                continue
            actor._needs_silhouette = True
            actor._silhouette_kwargs = dict(
                lw=lw or settings.LW,
                color=color,
            )

    @not_on_jupyter
    def add_label(self, actor, label, **kwargs):
        """
        Dedicated method to add lables to actors

        :param actor: Actors
        :param llabelw: str. Text of label
        :param **kwargs: see brainrender._actor.make_actor_label for kwargs
        """
        actor._needs_label = True
        actor._label_str = label
        actor._label_kwargs = kwargs

    def slice(
        self,
        plane: [str, Plane],
        actors=None,
        close_actors=False,
    ):
        """
        Slices actors with a plane.

        :param plane: str, Plane. If a string it needs to be
            a supported plane from brainglobe's atlas api (e.g. 'frontal')
            otherwise it should be a vedo.Plane mesh
        :param actors: list of actors to be sliced. If None all actors
            will be sliced
        :param close_actors: If true the openings in the actors meshes
            caused by teh cut will be closed.
        """
        if isinstance(plane, str):
            plane = self.atlas.get_plane(plane=plane)

        if not actors or actors is None:
            actors = self.clean_actors.copy()

        for actor in listify(actors):
            actor._mesh = actor._mesh.cutWithPlane(
                origin=plane.center,
                normal=plane.normal,
            )
            if close_actors:
                actor.cap()

            if actor.silhouette is not None:
                self.plotter.remove(actor.silhouette.mesh)
                self.plotter.add(actor.make_silhouette().mesh)

    @property
    def content(self):
        """
        Prints an overview of the Actors in the scene.
        """

        actors = pi.Report(
            "Scene actors", accent=salmon, dim=orange, color=orange
        )

        for act in self.actors:
            actors.add(
                f"[bold][{amber}]- {act.name}[/bold][{orange_darker}] (type: [{orange}]{act.br_class}[/{orange}])"
            )

        if "win32" != sys.platform:
            actors.print()
        else:
            print(pi.utils.stringify(actors, maxlen=-1))

    @property
    def renderables(self):
        """
        Returns the meshes for all actors.
        """
        if not self.backend:
            return [a.mesh for a in self.actors + self.labels]
        else:
            return [a.mesh for a in self.actors if not a.is_text]

    @property
    def clean_actors(self):
        """
        returns only ators that are not Text objects and similar
        """
        return [a for a in self.actors if not a.is_text]
