# -*- coding: utf-8 -*-
"""
$Id$

Copyright 2011 Lars Kruse <devel@sumpfralle.de>

This file is part of PyCAM.

PyCAM is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

PyCAM is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with PyCAM.  If not, see <http://www.gnu.org/licenses/>.
"""


import pycam.Plugins


class ModelScaling(pycam.Plugins.PluginBase):

    UI_FILE = "model_scaling.ui"
    DEPENDS = ["Models"]
    CATEGORIES = ["Model"]

    def setup(self):
        if self.gui:
            scale_box = self.gui.get_object("ModelScaleBox")
            scale_box.unparent()
            self.core.register_ui("model_handling", "Scale", scale_box, -5)
            scale_percent = self.gui.get_object("ScalePercent")
            scale_button = self.gui.get_object("ScaleModelButton")
            scale_percent.set_value(100)
            scale_dimension_button = self.gui.get_object("ScaleAllAxesButton")
            scale_dimension_control = self.gui.get_object(
                    "ScaleDimensionControl")
            self._gtk_handlers = []
            self._gtk_handlers.extend((
                    (scale_percent, "focus-in-event", lambda widget, data: scale_button.grab_default()),
                    (scale_percent, "focus-out-event", lambda widget, data: scale_box.get_toplevel().set_default(None)),
                    (scale_button, "clicked", self._scale_model),
                    (self.gui.get_object("ScaleDimensionAxis"), "changed", lambda widget=None: self.core.emit_event( "model-change-after")),
                    (scale_dimension_control, "focus-in-event", lambda widget, data: scale_dimension_button.grab_default()),
                    (scale_dimension_control, "focus-out-event", lambda widget, data: scale_box.get_toplevel().set_default(None)),
                    (scale_dimension_button, "clicked", lambda widget: self._scale_model_axis_fit(proportionally=True)),
                    (self.gui.get_object("ScaleSelectedAxisButton"), "clicked", lambda widget: self._scale_model_axis_fit(proportionally=False)),
                    (self.gui.get_object("ScaleInchMM"), "clicked", lambda widget: self._scale_model(percent=(100 * 25.4))),
                    (self.gui.get_object("ScaleMMInch"), "clicked", lambda widget: self._scale_model(percent=(100 / 25.4)))))
            self._event_handlers = (
                    ("model-selection-changed", self._update_scale_controls),
                    ("model-change-after", self._update_scale_controls))
            self.register_gtk_handlers(self._gtk_handlers)
            self.register_event_handlers(self._event_handlers)
            self._update_scale_controls()
        return True

    def teardown(self):
        if self.gui:
            self.core.unregister_ui("model_handling",
                    self.gui.get_object("ModelScaleBox"))
            self.unregister_gtk_handlers(self._gtk_handlers)
            self.unregister_event_handlers(self._event_handlers)

    def _update_scale_controls(self):
        models = self.core.get("models").get_selected()
        scale_box = self.gui.get_object("ModelScaleBox")
        if not models:
            scale_box.hide()
            return
        else:
            scale_box.show()
            # scale controls
            axis_control = self.gui.get_object("ScaleDimensionAxis")
            scale_button = self.gui.get_object("ScaleSelectedAxisButton")
            scale_value = self.gui.get_object("ScaleDimensionControl")
            index = axis_control.get_active()
            # TODO: get dimension of multiple models
            model = models[0]
            dims = (model.maxx - model.minx, model.maxy - model.miny,
                    model.maxz - model.minz)
            value = dims[index]
            non_zero_dimensions = [i for i, dim in enumerate(dims) if dim > 0]
            enable_controls = index in non_zero_dimensions
            scale_button.set_sensitive(enable_controls)
            scale_value.set_sensitive(enable_controls)
            scale_value.set_value(value)

    def _scale_model(self, widget=None, percent=None):
        models = self.core.get("models").get_selected()
        if not models:
            return
        if percent is None:
            percent = self.gui.get_object("ScalePercent").get_value()
        factor = percent / 100.0
        if (factor <= 0) or (factor == 1):
            return
        self.core.emit_event("model-change-before")
        progress = self.core.get("progress")
        progress.update(text="Scaling model")
        progress.disable_cancel()
        progress.set_multiple(len(models), "Model")
        for model in models:
            model.scale(factor, callback=progress.update)
            progress.update_multiple()
        progress.finish()
        self.core.emit_event("model-change-after")

    def _scale_model_axis_fit(self, widget=None, proportionally=False):
        models = self.core.get("models").get_selected()
        if not models:
            return
        value = self.gui.get_object("ScaleDimensionValue").get_value()
        index = self.gui.get_object("ScaleDimensionAxis").get_active()
        axes = "xyz"
        axis_suffix = axes[index]
        # TODO: use dimension of multiple models
        model = models[0]
        factor = value / (getattr(model, "max" + axis_suffix) - \
                getattr(model, "min" + axis_suffix))
        self.core.emit_event("model-change-before")
        progress = self.core.get("progress")
        progress.update(text="Scaling model")
        progress.disable_cancel()
        progress.set_multiple(len(models), "Model")
        for model in models:
            # TODO: use different scaling for multiple models
            if proportionally:
                model.scale(factor, callback=progress.update)
            else:
                factor_x, factor_y, factor_z = (1, 1, 1)
                if index == 0:
                    factor_x = factor
                elif index == 1:
                    factor_y = factor
                elif index == 2:
                    factor_z = factor
                else:
                    return
                model.scale(factor_x, factor_y, factor_z,
                        callback=progress.update)
            progress.update_multiple()
        progress.finish()
        self.core.emit_event("model-change-after")

