# PlotKPC.py -- Pamhyr
# Copyright (C) 2023  INRAE
#
# This program 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.
#
# This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.

# -*- coding: utf-8 -*-

from tools import timer
from View.Tools.PamhyrPlot import PamhyrPlot

from PyQt5.QtCore import (
    QCoreApplication
)

from matplotlib.collections import LineCollection

_translate = QCoreApplication.translate


class PlotKPC(PamhyrPlot):
    def __init__(self, canvas=None, trad=None, toolbar=None,
                 river=None, reach=None, profile=None,
                 parent=None):
        super(PlotKPC, self).__init__(
            canvas=canvas,
            trad=trad,
            data=river,
            toolbar=toolbar,
            parent=parent
        )

        self._current_reach = reach
        self._current_profile = profile

    @property
    def river(self):
        return self.data

    @river.setter
    def river(self, river):
        self.data = river

    @timer
    def draw(self, highlight=None):
        self.canvas.axes.cla()
        self.canvas.axes.grid(color='grey', linestyle='--', linewidth=0.5)

        if self.data is None:
            self.profile = None
            self.line_kp_zmin_zmax = None
            self.line_kp_zmin = None
            return

        if self._current_reach is None:
            self.profile = None
            self.line_kp_zmin_zmax = None
            self.line_kp_zmin = None
            return

        reach = self._current_reach

        self.canvas.axes.set_ylabel(
            _translate("MainWindow_reach", "Elevation (m)"),
            color='black', fontsize=11
        )
        self.canvas.axes.set_xlabel(
            _translate("MainWindow_reach", "KP (m)"),
            color='black', fontsize=11
        )

        kp = reach.reach.get_kp()
        z_min = reach.reach.get_z_min()
        z_max = reach.reach.get_z_max()

        self.canvas.axes.set_xlim(
            left=min(kp), right=max(kp)
        )

        self.line_kp_zmin, = self.canvas.axes.plot(
            kp, z_min,
            color='grey', lw=1.
        )

        if len(kp) != 0:

            self.line_kp_zmin_zmax = self.canvas.axes.vlines(
                x=kp,
                ymin=z_min, ymax=z_max,
                color='b',
                lw=1.
            )

        if self._current_profile is None:
            self.profile = None
        else:
            self.profile, = self.canvas.axes.plot(
                [self._current_profile.kp, self._current_profile.kp],
                [self._current_profile.z_min(), self._current_profile.z_max()],
                color='red', lw=1.
            )

        self.canvas.figure.tight_layout()
        self.canvas.figure.canvas.draw_idle()
        if self.toolbar is not None:
            self.toolbar.update()

    def set_reach(self, reach):
        self._current_reach = reach
        self._current_profile = None
        self.update()

    def set_profile(self, profile):
        self._current_profile = profile
        self.update_profil()

    def update(self):
        self.draw()

    def update_profil(self):
        reach = self._current_reach
        kp = reach.reach.get_kp()
        z_min = reach.reach.get_z_min()
        z_max = reach.reach.get_z_max()
        if self.profile is None:
            self.draw()
        else:
            self.profile.set_data(
                [self._current_profile.kp, self._current_profile.kp],
                [self._current_profile.z_min(), self._current_profile.z_max()],
            )
            self.canvas.figure.canvas.draw_idle()

    def clear(self):
        if self.profile is not None:
            self.profile.set_data([], [])
        if self.line_kp_zmin_zmax is not None:
            self.line_kp_zmin_zmax.remove()
            self.line_kp_zmin_zmax = None
        if self.line_kp_zmin is not None:
            self.line_kp_zmin.set_data([], [])
        self.canvas.figure.canvas.draw_idle()

    def clear_profile(self):
        if self.profile is not None:
            self.profile.set_data([], [])
        self.canvas.figure.canvas.draw_idle()