# Source code for svir.dialogs.load_hcurves_as_layer_dialog

    # -*- coding: utf-8 -*-
    # /***************************************************************************
    # Irmt
    #                                 A QGIS plugin
    # OpenQuake Integrated Risk Modelling Toolkit
    #                              -------------------
    #        begin                : 2013-10-24
    #        copyright            : (C) 2014 by GEM Foundation
    #        email                : devops@openquake.org
    # ***************************************************************************/
    #
    # OpenQuake is free software: you can redistribute it and/or modify it
    # under the terms of the GNU Affero General Public License as published
    # by the Free Software Foundation, either version 3 of the License, or
    # (at your option) any later version.
    #
    # OpenQuake 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 Affero General Public License
    # along with OpenQuake.  If not, see <http://www.gnu.org/licenses/>.

    from qgis.core import (
        QgsFeature, QgsGeometry, QgsPointXY, edit, QgsTask, QgsApplication)
    from svir.dialogs.load_output_as_layer_dialog import LoadOutputAsLayerDialog
    from svir.calculations.calculate_utils import add_numeric_attribute
    from svir.utilities.utils import log_msg, WaitCursorManager
    from svir.tasks.extract_npz_task import ExtractNpzTask

    class LoadHazardCurvesAsLayerDialog(LoadOutputAsLayerDialog):
        """
        Dialog to load hazard curves from an oq-engine output, as layer
        """

        def __init__(self, iface, viewer_dock, session, hostname, calc_id,
                     output_type='hcurves', path=None, mode=None,
                     engine_version=None):
            assert output_type == 'hcurves'
            LoadOutputAsLayerDialog.__init__(
                self, iface, viewer_dock, session, hostname, calc_id,
                output_type=output_type, path=path, mode=mode,
                engine_version=engine_version)

            self.setWindowTitle(
                'Load hazard curves as layer')
            self.create_num_sites_indicator()
            self.create_rlz_or_stat_selector(all_ckb=True)
            self.create_imt_selector(all_ckb=True)
            self.load_all_rlzs_or_stats_chk.setChecked(True)
            self.load_all_imts_chk.setChecked(True)

            self.extract_npz_task = ExtractNpzTask(
                'Extract hazard curves', QgsTask.CanCancel, self.session,
                self.hostname, self.calc_id, self.output_type, self.finalize_init,
                self.on_extract_error)
            QgsApplication.taskManager().addTask(self.extract_npz_task)

        def set_ok_button(self):
            self.ok_button.setEnabled(True)

        def populate_dataset(self):
            self.dataset = self.npz_file['all']

        def populate_rlz_or_stat_cbx(self):
            self.rlzs_or_stats = self.npz_file['all'].dtype.names[2:]
            for rlz_or_stat in self.rlzs_or_stats:
                self.rlz_or_stat_cbx.addItem(rlz_or_stat)

        def on_rlz_or_stat_changed(self):
            rlz_or_stat = self.rlz_or_stat_cbx.currentText()
            dataset = self.npz_file['all'][rlz_or_stat]
            self.imts = [imt for imt in dataset.dtype.names]
            self.imt_cbx.clear()
            for imt in self.imts:
                self.imt_cbx.addItem(imt)

        def on_imt_changed(self):
            self.set_ok_button()

        def show_num_sites(self):
            self.num_sites_lbl.setText(
                self.num_sites_msg % self.dataset.shape)

        def populate_out_dep_widgets(self):
            self.populate_rlz_or_stat_cbx()
            self.populate_dataset()
            self.show_num_sites()

        def build_layer_name(self, **kwargs):
            investigation_time = self.get_investigation_time()
            layer_name = "hcurves_%sy" % investigation_time
            return layer_name

        def get_field_names(self, **kwargs):
            field_names = []
            for rlz_or_stat in self.rlzs_or_stats:
                if (not self.load_all_rlzs_or_stats_chk.isChecked()
                        and rlz_or_stat != self.rlz_or_stat_cbx.currentText()):
                    continue
                for imt in self.dataset[rlz_or_stat].dtype.names:
                    if (not self.load_all_imts_chk.isChecked()
                            and imt != self.imt_cbx.currentText()):
                        continue
                    for iml in self.dataset[rlz_or_stat][imt].dtype.names:
                        field_name = "%s_%s_%s" % (rlz_or_stat, imt, iml)
                        field_names.append(field_name)
            return field_names

        def on_iml_changed(self):
            self.set_ok_button()

        def add_field_to_layer(self, field_name):
            added_field_name = add_numeric_attribute(field_name, self.layer)
            return added_field_name

        def read_npz_into_layer(self, field_names, **kwargs):
            with edit(self.layer):
                lons = self.npz_file['all']['lon']
                lats = self.npz_file['all']['lat']
                feats = []
                for row_idx, row in enumerate(self.dataset):
                    feat = QgsFeature(self.layer.fields())
                    for field_name_idx, field_name in enumerate(field_names):
                        rlz_or_stat, imt, iml = field_name.split('_')
                        poe = row[rlz_or_stat][imt][iml]
                        feat.setAttribute(field_name, float(poe))
                    feat.setGeometry(QgsGeometry.fromPointXY(
                        QgsPointXY(lons[row_idx], lats[row_idx])))
                    feats.append(feat)
                added_ok = self.layer.addFeatures(feats)
                if not added_ok:
                    msg = 'There was a problem adding features to the layer.'
                    log_msg(msg, level='C', message_bar=self.iface.messageBar())

        def load_from_npz(self):
            with WaitCursorManager('Creating layer...', self.iface.messageBar()):
                self.build_layer()
                self.style_curves()
            if self.npz_file is not None:
                self.npz_file.close()