"""
@package animation.nviztask

@brief Conversion from workspace file to m.nviz.image command

Classes:
 - nviztask::NvizTask

(C) 2013 by the GRASS Development Team

This program is free software under the GNU General Public License
(>=v2). Read the file COPYING that comes with GRASS for details.

@author Anna Petrasova <kratochanna gmail.com>
"""

import xml.etree.ElementTree as etree

from core.workspace import ProcessWorkspaceFile
from core.gcmd import RunCommand, GException
from core.utils import GetLayerNameFromCmd
from grass.script import task as gtask
from core.settings import UserSettings


class NvizTask:
    def __init__(self):
        self.task = None
        self.filename = None
        self.region = {}

    def Load(self, filename):
        self.task = gtask.grassTask("m.nviz.image")
        self.filename = filename
        try:
            gxwXml = ProcessWorkspaceFile(etree.parse(self.filename))
        except Exception:
            raise GException(
                _(
                    "Reading workspace file <%s> failed.\n"
                    "Invalid file, unable to parse XML document."
                )
                % filename
            )
        # for display in gxwXml.displays:
        # pprint(display)
        # for layer in gxwXml.layers:
        # pprint(layer)
        # pprint(gxwXml.nviz_state)

        if not gxwXml.nviz_state:
            raise GException(
                _("No 3d view information in workspace file <%s>.") % self.filename
            )

        self._getExtent(gxwXml)
        self._processState(gxwXml.nviz_state)
        self._processLayers(gxwXml.layers)

    def _getExtent(self, root):
        for display in root.displays:
            if display["viewMode"] == "3d":
                (
                    self.region["w"],
                    self.region["s"],
                    self.region["e"],
                    self.region["n"],
                    self.region["b"],
                    self.region["t"],
                ) = display["extent"]
                self.region["tbres"] = display["tbres"]

    def _processLayers(self, layers):
        for layer in layers:
            if not layer["checked"]:
                continue

            if not layer["nviz"]:
                continue
            layerName, found = GetLayerNameFromCmd(
                layer["cmd"], fullyQualified=False, param="map"
            )
            if not found:
                continue

            if "surface" in layer["nviz"]:
                self._processSurface(layer["nviz"]["surface"], mapName=layerName)
            if "volume" in layer["nviz"]:
                self._processVolume(layer["nviz"]["volume"], mapName=layerName)
            if "vector" in layer["nviz"]:
                if "points" in layer["nviz"]["vector"]:
                    self._processPoints(
                        layer["nviz"]["vector"]["points"], mapName=layerName
                    )

    def _processSurface(self, surface, mapName):
        self._setMultiTaskParam("elevation_map", mapName)

        # attributes like color, shine, transparency
        attributes = ("color", "shine", "transp")  # mask missing
        parameters = (
            ("color_map", "color"),
            ("shininess_map", "shininess_value"),
            ("transparency_map", "transparency_value"),
        )
        for attr, params in zip(attributes, parameters):
            mapname = None
            const = None
            if attr in surface["attribute"]:
                if surface["attribute"][attr]["map"]:
                    mapname = surface["attribute"][attr]["value"]
                else:
                    const = surface["attribute"][attr]["value"]
            else:
                if attr == "transp":
                    const = 0
                elif attr == "color":
                    mapname = mapName

            if mapname:
                self._setMultiTaskParam(params[0], mapname)
            else:
                self._setMultiTaskParam(params[1], const)

        # draw mode
        for mode in ("mode", "shading", "style"):
            value = surface["draw"]["mode"]["desc"][mode]
            self._setMultiTaskParam(mode, value)
        # wire color
        value = surface["draw"]["wire-color"]["value"]
        self._setMultiTaskParam("wire_color", value)
        # resolution
        for mode1, mode2 in zip(
            ("coarse", "fine"), ("resolution_coarse", "resolution_fine")
        ):
            value = surface["draw"]["resolution"][mode1]
            self._setMultiTaskParam(mode2, value)

        # position
        pos = []
        for coor in ("x", "y", "z"):
            pos.append(str(surface["position"][coor]))
        value = ",".join(pos)
        self._setMultiTaskParam("surface_position", value)

    def _processPoints(self, points, mapName):
        for attrib in ("color", "size", "width"):
            if attrib in points:
                val = points[attrib]["value"]
                self._setMultiTaskParam("vpoint_" + attrib, str(val))
        if "height" in points:
            height = points["height"]["value"]
            self._setMultiTaskParam("vpoint_position", "0,0,{h}".format(h=height))
        if "marker" in points:
            marker = list(
                UserSettings.Get(
                    group="nviz",
                    key="vector",
                    subkey=["points", "marker"],
                    settings_type="internal",
                )
            )[points["marker"]["value"]]
            self._setMultiTaskParam("vpoint_marker", marker)
        if "mode" in points:
            if points["mode"]["type"] == "3d":
                self._setMultiTaskParam("vpoint_mode", "3D")
            else:
                self._setMultiTaskParam("vpoint_mode", "surface")

    def _processVolume(self, volume, mapName):
        self._setMultiTaskParam("volume", mapName)

        if volume["draw"]["box"]["enabled"]:
            self.task.set_flag("b", True)

        # isosurfaces
        isosurfaces = volume["isosurface"]
        if isosurfaces:
            res_value = volume["draw"]["resolution"]["isosurface"]["value"]
            self._setMultiTaskParam("volume_resolution", res_value)
            for isosurface in isosurfaces:
                attributes = ("topo", "color", "shine", "transp")
                parameters = (
                    (None, "isosurf_level"),
                    ("isosurf_color_map", "isosurf_color_value"),
                    ("isosurf_shininess_map", "isosurf_shininess_value"),
                    ("isosurf_transparency_map", "isosurf_transparency_value"),
                )
                for attr, params in zip(attributes, parameters):
                    mapname = None
                    const = None
                    if attr in isosurface:
                        if isosurface[attr]["map"]:
                            mapname = isosurface[attr]["value"]
                        else:
                            const = float(isosurface[attr]["value"])
                    else:
                        if attr == "transp":
                            const = 0
                        elif attr == "color":
                            mapname = mapName

                    if mapname:
                        self._setMultiTaskParam(params[0], mapname)
                    else:
                        if attr == "topo":
                            # TODO: we just assume it's the first volume, what
                            # to do else?
                            self._setMultiTaskParam(params[1], "1:" + str(const))
                        else:
                            self._setMultiTaskParam(params[1], const)
                if isosurface["inout"]["value"]:
                    self.task.set_flag("n", True)
        # slices
        slices = volume["slice"]
        if slices:
            res_value = volume["draw"]["resolution"]["slice"]["value"]
            self._setMultiTaskParam("volume_resolution", res_value)
            for slice_ in slices:
                self._setMultiTaskParam("slice_transparency", slice_["transp"]["value"])
                axis = slice_["position"]["axis"]
                self._setMultiTaskParam("slice", "1:" + "xyz"[axis])
                pos = slice_["position"]
                coords = (
                    pos["x1"],
                    pos["x2"],
                    pos["y1"],
                    pos["y2"],
                    pos["z1"],
                    pos["z2"],
                )
                self._setMultiTaskParam(
                    "slice_position", ",".join([str(c) for c in coords])
                )

        # position
        pos = []
        for coor in ("x", "y", "z"):
            pos.append(str(volume["position"][coor]))
            value = ",".join(pos)

        self._setMultiTaskParam("volume_position", value)

    def _processState(self, state):
        color = state["view"]["background"]["color"]
        self.task.set_param("bgcolor", self._join(color, delim=":"))
        self.task.set_param(
            "position",
            self._join(
                (state["view"]["position"]["x"], state["view"]["position"]["y"])
            ),
        )
        self.task.set_param("height", state["iview"]["height"]["value"])
        self.task.set_param("perspective", state["view"]["persp"]["value"])
        self.task.set_param("twist", state["view"]["twist"]["value"])
        # TODO: fix zexag
        self.task.set_param("zexag", state["view"]["z-exag"]["value"])
        self.task.set_param(
            "focus",
            self._join(
                (
                    state["iview"]["focus"]["x"],
                    state["iview"]["focus"]["y"],
                    state["iview"]["focus"]["z"],
                )
            ),
        )
        self.task.set_param(
            "light_position",
            self._join(
                (
                    state["light"]["position"]["x"],
                    state["light"]["position"]["y"],
                    state["light"]["position"]["z"] / 100.0,
                )
            ),
        )
        color = state["light"]["color"][:3]
        self.task.set_param("light_color", self._join(color, delim=":"))
        self.task.set_param("light_brightness", int(state["light"]["bright"]))
        self.task.set_param("light_ambient", state["light"]["ambient"])

    def _setMultiTaskParam(self, param, value):
        last = self.task.get_param(param)["value"]
        self.task.set_param(param, self._join((last, value)))

    def _join(self, toJoin, delim=","):
        toJoin = filter(self._ignore, toJoin)
        return delim.join(map(str, toJoin))

    def _ignore(self, value):
        if value == "" or value is None:
            return False
        else:
            return True

    def ListMapParameters(self):
        # params = self.task.get_list_params()
        # parameter with 'map' name
        # params = filter(lambda x: 'map' in x, params)
        return ("elevation_map", "color_map", "vline", "vpoint", "volume")

    def GetCommandSeries(self, layerList, paramName):
        commands = []
        if not self.task:
            return commands

        if len(layerList) > 1:
            raise GException(_("Please add only one layer in the list."))
            return
        layer = layerList[0]
        if hasattr(layer, "maps"):
            series = layer.maps
        else:
            raise GException(_("No map series nor space-time dataset is added."))

        for value in series:
            self.task.set_param(paramName, value)
            # FIXME: we assume we want always default color map
            if paramName == "elevation_map":
                self.task.set_param(
                    "color_map", self.task.get_param(paramName)["value"]
                )
            if paramName == "volume":
                self.task.set_param("isosurf_color_map", "")
            self.task.set_flag("overwrite", True)
            self.task.set_param("output", "tobechanged")
            cmd = self.task.get_cmd(
                ignoreErrors=False, ignoreRequired=False, ignoreDefault=True
            )
            commands.append(cmd)

        return commands

    def GetCommand(self):
        if not self.task:
            return None
        self.task.set_flag("overwrite", True)
        self.task.set_param("output", "tobechanged")
        cmd = self.task.get_cmd(
            ignoreErrors=False, ignoreRequired=False, ignoreDefault=True
        )
        return gtask.cmdlist_to_tuple(cmd)

    def GetRegion(self):
        return self.region


def test():
    nviz = NvizTask("/home/anna/testy/nviz/t12.gxw")
    # nviz = NvizState('/home/anna/testy/nviz/t3.gxw')

    # cmd = nviz.GetCommand()
    cmds = nviz.GetCommandSeries(["aspect", "elevation"], "color_map")
    for cmd in cmds:
        print(cmd)
        returncode, message = RunCommand(getErrorMsg=True, prog=cmd[0], **cmd[1])
        print(returncode, message)


if __name__ == "__main__":
    test()