import os
import re
import sys

import avalon.api as avalon
import hiero
import pyblish.api
import avalon.io
from avalon.vendor.Qt import (QtWidgets, QtGui)

import pype.api as pype
from pype.api import Logger, Anatomy

log = Logger().get_logger(__name__, "hiero")

cached_process = None


self = sys.modules[__name__]
self._has_been_setup = False
self._has_menu = False
self._registered_gui = None

AVALON_CONFIG = os.getenv("AVALON_CONFIG", "pype")


def set_workfiles():
    ''' Wrapping function for workfiles launcher '''
    from avalon.tools import workfiles

    workdir = os.environ["AVALON_WORKDIR"]

    # show workfile gui
    workfiles.show(workdir)


def sync_avalon_data_to_workfile():
    # import session to get project dir
    project_name = avalon.Session["AVALON_PROJECT"]

    anatomy = Anatomy(project_name)
    work_template = anatomy.templates["work"]["path"]
    work_root = anatomy.root_value_for_template(work_template)
    active_project_root = (
        os.path.join(work_root, project_name)
    ).replace("\\", "/")
    # getting project
    project = hiero.core.projects()[-1]

    if "Tag Presets" in project.name():
        return

    log.debug("Synchronizing Pype metadata to project: {}".format(
        project.name()))

    # set project root with backward compatibility
    try:
        project.setProjectDirectory(active_project_root)
    except Exception:
        # old way of seting it
        project.setProjectRoot(active_project_root)

    # get project data from avalon db
    project_doc = avalon.io.find_one({"type": "project"})
    project_data = project_doc["data"]

    log.debug("project_data: {}".format(project_data))

    # get format and fps property from avalon db on project
    width = project_data["resolutionWidth"]
    height = project_data["resolutionHeight"]
    pixel_aspect = project_data["pixelAspect"]
    fps = project_data['fps']
    format_name = project_data['code']

    # create new format in hiero project
    format = hiero.core.Format(width, height, pixel_aspect, format_name)
    project.setOutputFormat(format)

    # set fps to hiero project
    project.setFramerate(fps)

    # TODO: add auto colorspace set from project drop
    log.info("Project property has been synchronised with Avalon db")


def launch_workfiles_app(event):
    """
    Event for launching workfiles after hiero start

    Args:
        event (obj): required but unused
    """
    set_workfiles()


def reload_config():
    """Attempt to reload pipeline at run-time.

    CAUTION: This is primarily for development and debugging purposes.

    """

    import importlib

    for module in (
        "avalon",
        "avalon.lib",
        "avalon.pipeline",
        "pyblish",
        "pyblish_lite",
        "pypeapp",
        "{}.api".format(AVALON_CONFIG),
        "{}.templates".format(AVALON_CONFIG),
        "{}.hosts.hiero.lib".format(AVALON_CONFIG),
        "{}.hosts.hiero.menu".format(AVALON_CONFIG),
        "{}.hosts.hiero.tags".format(AVALON_CONFIG)
    ):
        log.info("Reloading module: {}...".format(module))
        try:
            module = importlib.import_module(module)
            reload(module)
        except Exception as e:
            log.warning("Cannot reload module: {}".format(e))
            importlib.reload(module)


def setup(console=False, port=None, menu=True):
    """Setup integration

    Registers Pyblish for Hiero plug-ins and appends an item to the File-menu

    Arguments:
        console (bool): Display console with GUI
        port (int, optional): Port from which to start looking for an
            available port to connect with Pyblish QML, default
            provided by Pyblish Integration.
        menu (bool, optional): Display file menu in Hiero.
    """

    if self._has_been_setup:
        teardown()

    add_submission()

    if menu:
        add_to_filemenu()
        self._has_menu = True

    self._has_been_setup = True
    print("pyblish: Loaded successfully.")


def show():
    """Try showing the most desirable GUI
    This function cycles through the currently registered
    graphical user interfaces, if any, and presents it to
    the user.
    """

    return (_discover_gui() or _show_no_gui)()


def _discover_gui():
    """Return the most desirable of the currently registered GUIs"""

    # Prefer last registered
    guis = reversed(pyblish.api.registered_guis())

    for gui in list(guis) + ["pyblish_lite"]:
        try:
            gui = __import__(gui).show
        except (ImportError, AttributeError):
            continue
        else:
            return gui


def teardown():
    """Remove integration"""
    if not self._has_been_setup:
        return

    if self._has_menu:
        remove_from_filemenu()
        self._has_menu = False

    self._has_been_setup = False
    print("pyblish: Integration torn down successfully")


def remove_from_filemenu():
    raise NotImplementedError("Implement me please.")


def add_to_filemenu():
    PublishAction()


class PyblishSubmission(hiero.exporters.FnSubmission.Submission):

    def __init__(self):
        hiero.exporters.FnSubmission.Submission.__init__(self)

    def addToQueue(self):
        # Add submission to Hiero module for retrieval in plugins.
        hiero.submission = self
        show()


def add_submission():
    registry = hiero.core.taskRegistry
    registry.addSubmission("Pyblish", PyblishSubmission)


class PublishAction(QtWidgets.QAction):
    """
    Action with is showing as menu item
    """

    def __init__(self):
        QtWidgets.QAction.__init__(self, "Publish", None)
        self.triggered.connect(self.publish)

        for interest in ["kShowContextMenu/kTimeline",
                         "kShowContextMenukBin",
                         "kShowContextMenu/kSpreadsheet"]:
            hiero.core.events.registerInterest(interest, self.eventHandler)

        self.setShortcut("Ctrl+Alt+P")

    def publish(self):
        # Removing "submission" attribute from hiero module, to prevent tasks
        # from getting picked up when not using the "Export" dialog.
        if hasattr(hiero, "submission"):
            del hiero.submission
        show()

    def eventHandler(self, event):
        # Add the Menu to the right-click menu
        event.menu.addAction(self)


def _show_no_gui():
    """
    Popup with information about how to register a new GUI
    In the event of no GUI being registered or available,
    this information dialog will appear to guide the user
    through how to get set up with one.
    """

    messagebox = QtWidgets.QMessageBox()
    messagebox.setIcon(messagebox.Warning)
    messagebox.setWindowIcon(QtGui.QIcon(os.path.join(
        os.path.dirname(pyblish.__file__),
        "icons",
        "logo-32x32.svg"))
    )

    spacer = QtWidgets.QWidget()
    spacer.setMinimumSize(400, 0)
    spacer.setSizePolicy(QtWidgets.QSizePolicy.Minimum,
                         QtWidgets.QSizePolicy.Expanding)

    layout = messagebox.layout()
    layout.addWidget(spacer, layout.rowCount(), 0, 1, layout.columnCount())

    messagebox.setWindowTitle("Uh oh")
    messagebox.setText("No registered GUI found.")

    if not pyblish.api.registered_guis():
        messagebox.setInformativeText(
            "In order to show you a GUI, one must first be registered. "
            "Press \"Show details...\" below for information on how to "
            "do that.")

        messagebox.setDetailedText(
            "Pyblish supports one or more graphical user interfaces "
            "to be registered at once, the next acting as a fallback to "
            "the previous."
            "\n"
            "\n"
            "For example, to use Pyblish Lite, first install it:"
            "\n"
            "\n"
            "$ pip install pyblish-lite"
            "\n"
            "\n"
            "Then register it, like so:"
            "\n"
            "\n"
            ">>> import pyblish.api\n"
            ">>> pyblish.api.register_gui(\"pyblish_lite\")"
            "\n"
            "\n"
            "The next time you try running this, Lite will appear."
            "\n"
            "See http://api.pyblish.com/register_gui.html for "
            "more information.")

    else:
        messagebox.setInformativeText(
            "None of the registered graphical user interfaces "
            "could be found."
            "\n"
            "\n"
            "Press \"Show details\" for more information.")

        messagebox.setDetailedText(
            "These interfaces are currently registered."
            "\n"
            "%s" % "\n".join(pyblish.api.registered_guis()))

    messagebox.setStandardButtons(messagebox.Ok)
    messagebox.exec_()


def CreateNukeWorkfile(nodes=None,
                       nodes_effects=None,
                       to_timeline=False,
                       **kwargs):
    ''' Creating nuke workfile with particular version with given nodes
    Also it is creating timeline track items as precomps.

    Arguments:
        nodes(list of dict): each key in dict is knob order is important
        to_timeline(type): will build trackItem with metadata

    Returns:
        bool: True if done

    Raises:
        Exception: with traceback

    '''
    import hiero.core
    from pype.hosts.nuke import (
        lib as nklib
    )

    # check if the file exists if does then Raise "File exists!"
    if os.path.exists(filepath):
        raise FileExistsError("File already exists: `{}`".format(filepath))

    # if no representations matching then
    #   Raise "no representations to be build"
    if len(representations) == 0:
        raise AttributeError("Missing list of `representations`")

    # check nodes input
    if len(nodes) == 0:
        log.warning("Missing list of `nodes`")

    # create temp nk file
    nuke_script = hiero.core.nuke.ScriptWriter()

    # create root node and save all metadata
    root_node = hiero.core.nuke.RootNode()

    anatomy = Anatomy(os.environ["AVALON_PROJECT"])
    work_template = anatomy.templates["work"]["path"]
    root_path = anatomy.root_value_for_template(work_template)

    nuke_script.addNode(root_node)

    # here to call pype.hosts.nuke.lib.BuildWorkfile
    script_builder = nklib.BuildWorkfile(
        root_node=root_node,
        root_path=root_path,
        nodes=nuke_script.getNodes(),
        **kwargs
    )


class ClipLoader:

    active_bin = None

    def __init__(self, plugin_cls, context, sequence=None, track=None, **kwargs):
        """ Initialize object

        Arguments:
            plugin_cls (api.Loader): plugin object
            context (dict): loader plugin context
            sequnce (hiero.core.Sequence): sequence object
            track (hiero.core.Track): track object
            kwargs (dict)[optional]: possible keys:
                projectBinPath: "path/to/binItem"
                hieroWorkfileName: "name_of_hiero_project_file_no_extension"

        """
        self.cls = plugin_cls
        self.context = context
        self.kwargs = kwargs
        self.active_project = self._get_active_project()
        self.project_bin = self.active_project.clipsBin()

        self.data = dict()

        assert self._set_data(), str("Cannot Load selected data, look into "
                                     "database or call your supervisor")

        # inject asset data to representation dict
        self._get_asset_data()
        log.debug("__init__ self.data: `{}`".format(self.data))

        # add active components to class
        self.active_sequence = self._get_active_sequence(sequence)
        self.active_track = self._get_active_track(track)

    def _set_data(self):
        """ Gets context and convert it to self.data
        data structure:
            {
                "name": "assetName_subsetName_representationName"
                "path": "path/to/file/created/by/get_repr..",
                "binPath": "projectBinPath",
            }
        """
        # create name
        repr = self.context["representation"]
        repr_cntx = repr["context"]
        asset = str(repr_cntx["asset"])
        subset = str(repr_cntx["subset"])
        representation = str(repr_cntx["representation"])
        self.data["clip_name"] = "_".join([asset, subset, representation])
        self.data["track_name"] = "_".join([subset, representation])

        # gets file path
        file = self.cls.fname
        if not file:
            repr_id = repr["_id"]
            log.warning(
                "Representation id `{}` is failing to load".format(repr_id))
            return None
        self.data["path"] = file.replace("\\", "/")

        # convert to hashed path
        if repr_cntx.get("frame"):
            self._fix_path_hashes()

        # solve project bin structure path
        hierarchy = str("/".join((
            "Loader",
            repr_cntx["hierarchy"].replace("\\", "/"),
            asset
        )))

        self.data["binPath"] = self.kwargs.get(
            "projectBinPath",
            hierarchy
        )

        return True

    def _fix_path_hashes(self):
        """ Convert file path where it is needed padding with hashes
        """
        file = self.data["path"]
        if "#" not in file:
            frame = self.context["representation"]["context"].get("frame")
            padding = len(frame)
            file = file.replace(frame, "#" * padding)
        self.data["path"] = file

    def _get_active_project(self):
        """ Get hiero active project object
        """
        fname = self.kwargs.get("hieroWorkfileName", "")

        return next((p for p in hiero.core.projects()
                     if fname in p.name()),
                    hiero.core.projects()[-1])

    def _get_asset_data(self):
        """ Get all available asset data

        joint `data` key with asset.data dict into the representaion

        """
        asset_name = self.context["representation"]["context"]["asset"]
        self.data["assetData"] = pype.get_asset(asset_name)["data"]

    def _make_project_bin(self, hierarchy):
        """ Creare bins by given hierarchy path

        It will also make sure no duplicit bins will be created

        Arguments:
            hierarchy (str): path devided by slashes "bin0/bin1/bin2"

        Returns:
            bin (hiero.core.BinItem): with the bin to be used for mediaItem
        """
        if self.active_bin:
            return self.active_bin

        assert hierarchy != "", "Please add hierarchy!"
        log.debug("__ hierarchy1: `{}`".format(hierarchy))
        if '/' in hierarchy:
            hierarchy = hierarchy.split('/')
        else:
            hierarchy = [hierarchy]

        parent_bin = None
        for i, name in enumerate(hierarchy):
            # if first index and list is more then one long
            if i == 0:
                bin = next((bin for bin in self.project_bin.bins()
                            if name in bin.name()), None)
                if not bin:
                    bin = hiero.core.Bin(name)
                    self.project_bin.addItem(bin)
                log.debug("__ bin.name: `{}`".format(bin.name()))
                parent_bin = bin

            # if second to prelast
            elif (i >= 1) and (i <= (len(hierarchy) - 1)):
                bin = next((bin for bin in parent_bin.bins()
                            if name in bin.name()), None)
                if not bin:
                    bin = hiero.core.Bin(name)
                    parent_bin.addItem(bin)

                parent_bin = bin

        return parent_bin

    def _make_track_item(self):
        """ Create track item with """
        pass

    def _set_clip_color(self, last_version=True):
        """ Sets color of clip on clip/track item

        Arguments:
            last_version (bool): True = green | False = red
        """
        pass

    def _set_container_tag(self, item, metadata):
        """ Sets container tag to given clip/track item

        Arguments:
            item (hiero.core.BinItem or hiero.core.TrackItem)
            metadata (dict): data to be added to tag
        """
        pass

    def _get_active_sequence(self, sequence):
        if not sequence:
            return hiero.ui.activeSequence()
        else:
            return sequence

    def _get_active_track(self, track):
        if not track:
            track_name = self.data["track_name"]
        else:
            track_name = track.name()

        track_pass = next(
            (t for t in self.active_sequence.videoTracks()
             if t.name() in track_name), None
        )

        if not track_pass:
            track_pass = hiero.core.VideoTrack(track_name)
            self.active_sequence.addTrack(track_pass)

        return track_pass

    def load(self):
        log.debug("__ active_project: `{}`".format(self.active_project))
        log.debug("__ active_sequence: `{}`".format(self.active_sequence))

        # create project bin for the media to be imported into
        self.active_bin = self._make_project_bin(self.data["binPath"])
        log.debug("__ active_bin: `{}`".format(self.active_bin))

        log.debug("__ version.data: `{}`".format(
            self.context["version"]["data"]))

        # create mediaItem in active project bin
        # create clip media
        media = hiero.core.MediaSource(self.data["path"])
        media_duration = int(media.duration())

        handle_start = int(self.data["assetData"]["handleStart"])
        handle_end = int(self.data["assetData"]["handleEnd"])

        clip_in = int(self.data["assetData"]["clipIn"])
        clip_out = int(self.data["assetData"]["clipOut"])

        log.debug("__ media_duration: `{}`".format(media_duration))
        log.debug("__ handle_start: `{}`".format(handle_start))
        log.debug("__ handle_end: `{}`".format(handle_end))
        log.debug("__ clip_in: `{}`".format(clip_in))
        log.debug("__ clip_out: `{}`".format(clip_out))

        # check if slate is included
        # either in version data families or by calculating frame diff
        slate_on = next(
            (f for f in self.context["version"]["data"]["families"]
             if "slate" in f),
            None) or bool(((
                clip_out - clip_in + 1) + handle_start + handle_end
            ) - media_duration)

        log.debug("__ slate_on: `{}`".format(slate_on))

        # calculate slate differences
        if slate_on:
            media_duration -= 1
            handle_start += 1

        fps = self.data["assetData"]["fps"]

        # create Clip from Media
        _clip = hiero.core.Clip(media)
        _clip.setName(self.data["clip_name"])

        # add Clip to bin if not there yet
        if self.data["clip_name"] not in [
                b.name()
                for b in self.active_bin.items()]:
            binItem = hiero.core.BinItem(_clip)
            self.active_bin.addItem(binItem)

        _source = next((item for item in self.active_bin.items()
                        if self.data["clip_name"] in item.name()), None)

        if not _source:
            log.warning("Problem with created Source clip: `{}`".format(
                self.data["clip_name"]))

        version = next((s for s in _source.items()), None)
        clip = version.item()

        # add to track as clip item
        track_item = hiero.core.TrackItem(
            self.data["clip_name"], hiero.core.TrackItem.kVideo)

        track_item.setSource(clip)

        track_item.setSourceIn(handle_start)
        track_item.setTimelineIn(clip_in)

        track_item.setSourceOut(media_duration - handle_end)
        track_item.setTimelineOut(clip_out)
        track_item.setPlaybackSpeed(1)
        self.active_track.addTrackItem(track_item)

        log.info("Loading clips: `{}`".format(self.data["clip_name"]))


def create_nk_workfile_clips(nk_workfiles, seq=None):
    '''
    nk_workfile is list of dictionaries like:
    [{
        'path': 'P:/Jakub_testy_pipeline/test_v01.nk',
        'name': 'test',
        'handleStart': 15, # added asymetrically to handles
        'handleEnd': 10, # added asymetrically to handles
        "clipIn": 16,
        "frameStart": 991,
        "frameEnd": 1023,
        'task': 'Comp-tracking',
        'work_dir': 'VFX_PR',
        'shot': '00010'
    }]
    '''

    proj = hiero.core.projects()[-1]
    root = proj.clipsBin()

    if not seq:
        seq = hiero.core.Sequence('NewSequences')
        root.addItem(hiero.core.BinItem(seq))
    # todo will ned to define this better
    # track = seq[1]  # lazy example to get a destination#  track
    clips_lst = []
    for nk in nk_workfiles:
        task_path = '/'.join([nk['work_dir'], nk['shot'], nk['task']])
        bin = create_bin_in_project(task_path, proj)

        if nk['task'] not in seq.videoTracks():
            track = hiero.core.VideoTrack(nk['task'])
            seq.addTrack(track)
        else:
            track = seq.tracks(nk['task'])

        # create clip media
        media = hiero.core.MediaSource(nk['path'])
        media_in = int(media.startTime() or 0)
        media_duration = int(media.duration() or 0)

        handle_start = nk.get("handleStart")
        handle_end = nk.get("handleEnd")

        if media_in:
            source_in = media_in + handle_start
        else:
            source_in = nk["frameStart"] + handle_start

        if media_duration:
            source_out = (media_in + media_duration - 1) - handle_end
        else:
            source_out = nk["frameEnd"] - handle_end

        source = hiero.core.Clip(media)

        name = os.path.basename(os.path.splitext(nk['path'])[0])
        split_name = split_by_client_version(name)[0] or name

        # add to bin as clip item
        items_in_bin = [b.name() for b in bin.items()]
        if split_name not in items_in_bin:
            binItem = hiero.core.BinItem(source)
            bin.addItem(binItem)

        new_source = [
            item for item in bin.items() if split_name in item.name()
        ][0].items()[0].item()

        # add to track as clip item
        trackItem = hiero.core.TrackItem(
            split_name, hiero.core.TrackItem.kVideo)
        trackItem.setSource(new_source)
        trackItem.setSourceIn(source_in)
        trackItem.setSourceOut(source_out)
        trackItem.setTimelineIn(nk["clipIn"])
        trackItem.setTimelineOut(nk["clipIn"] + (source_out - source_in))
        track.addTrackItem(trackItem)
        clips_lst.append(trackItem)

    return clips_lst


def create_bin_in_project(bin_name='', project=''):
    '''
    create bin in project and
    if the bin_name is "bin1/bin2/bin3" it will create whole depth
    '''

    if not project:
        # get the first loaded project
        project = hiero.core.projects()[-1]
    if not bin_name:
        return None
    if '/' in bin_name:
        bin_name = bin_name.split('/')
    else:
        bin_name = [bin_name]

    clipsBin = project.clipsBin()

    done_bin_lst = []
    for i, b in enumerate(bin_name):
        if i == 0 and len(bin_name) > 1:
            if b in [bin.name() for bin in clipsBin.bins()]:
                bin = [bin for bin in clipsBin.bins() if b in bin.name()][0]
                done_bin_lst.append(bin)
            else:
                create_bin = hiero.core.Bin(b)
                clipsBin.addItem(create_bin)
                done_bin_lst.append(create_bin)

        elif i >= 1 and i < len(bin_name) - 1:
            if b in [bin.name() for bin in done_bin_lst[i - 1].bins()]:
                bin = [
                    bin for bin in done_bin_lst[i - 1].bins()
                    if b in bin.name()
                ][0]
                done_bin_lst.append(bin)
            else:
                create_bin = hiero.core.Bin(b)
                done_bin_lst[i - 1].addItem(create_bin)
                done_bin_lst.append(create_bin)

        elif i == len(bin_name) - 1:
            if b in [bin.name() for bin in done_bin_lst[i - 1].bins()]:
                bin = [
                    bin for bin in done_bin_lst[i - 1].bins()
                    if b in bin.name()
                ][0]
                done_bin_lst.append(bin)
            else:
                create_bin = hiero.core.Bin(b)
                done_bin_lst[i - 1].addItem(create_bin)
                done_bin_lst.append(create_bin)
    # print [bin.name() for bin in clipsBin.bins()]
    return done_bin_lst[-1]


def split_by_client_version(string):
    regex = r"[/_.]v\d+"
    try:
        matches = re.findall(regex, string, re.IGNORECASE)
        return string.split(matches[0])
    except Exception as e:
        print(e)
        return None


# nk_workfiles = [{
#     'path': 'C:/Users/hubert/_PYPE_testing/projects/D001_projectx/episodes/ep120/ep120sq01/120sh020/publish/plates/platesMain/v023/prjx_120sh020_platesMain_v023.nk',
#     'name': '120sh020_platesMain',
#     'handles': 10,
#     'handleStart': 10,
#     'handleEnd': 10,
#     "clipIn": 16,
#     "frameStart": 991,
#     "frameEnd": 1023,
#     'task': 'platesMain',
#     'work_dir': 'shots',
#     'shot': '120sh020'
# }]