/*
 * This is Free Software under GNU Affero General Public License v >= 3.0
 * without warranty, see README.md and license for details.
 * 
 * SPDX-License-Identifier: AGPL-3.0-or-later
 * License-Filename: LICENSES/AGPL-3.0.txt
 * 
 * Copyright (C) 2018 by via donau 
 *   – Österreichische Wasserstraßen-Gesellschaft mbH
 * Software engineering by Intevation GmbH
 * 
 * Author(s):
 * Thomas Junk <thomas.junk@intevation.de>
 * Markus Kottländer <markuks.kottlaender@intevation.de>
 */
import Vue from "vue";
import { HTTP } from "../application/lib/http";
import { prepareProfile } from "../application/lib/geo";
import LineString from "ol/geom/LineString.js";
import { generateFeatureRequest } from "../application/lib/geo.js";

const DEMOLEVEL = 149.345;

const FairwayProfile = {
  namespaced: true,
  state: {
    additionalSurvey: "",
    availableSurveys: null,
    totalLength: 0,
    minAlt: 0,
    maxAlt: 0,
    currentProfile: {},
    waterLevels: [{ year: "2016", level: DEMOLEVEL, color: "#005DFF" }],
    selectedWaterLevel: DEMOLEVEL,
    fairwayCoordinates: [],
    startPoint: null,
    endPoint: null,
    selectedMorph: null
  },
  getters: {
    length: state => {
      return state.totalLength;
    },
    additionalSurvey: state => {
      return state.additionalSurvey;
    }
  },
  mutations: {
    setAdditionalSurvey: (state, additionalSurvey) => {
      state.additionalSurvey = additionalSurvey;
    },
    setSelectedMorph: (state, selectedMorph) => {
      state.selectedMorph = selectedMorph;
    },
    setAvailableSurveys: (state, surveys) => {
      state.availableSurveys = surveys;
    },
    setSelectedWaterLevel: (state, level) => {
      state.selectedWaterLevel = level;
    },
    profileLoaded: (state, answer) => {
      const { response, surveyDate } = answer;
      const { data } = response;
      const coordinates = data.geometry.coordinates;
      if (!coordinates) return;
      const startPoint = state.startPoint;
      const endPoint = state.endPoint;
      const geoJSON = data;
      const result = prepareProfile({ geoJSON, startPoint, endPoint });
      // Use Vue.set() to make new object properties rective
      // https://vuejs.org/v2/guide/reactivity.html#Change-Detection-Caveats
      Vue.set(state.currentProfile, surveyDate, result.points);
      if (!state.minAlt || state.minAlt > result.minAlt) {
        state.minAlt = result.minAlt;
      }
      if (!state.maxAlt || state.maxAlt < result.maxAlt) {
        state.maxAlt = result.maxAlt;
      }
      if (!state.totalLength || state.totalLength < result.lengthPolyLine) {
        state.totalLength = result.lengthPolyLine;
      }
    },
    setStartPoint: (state, start) => {
      state.startPoint = start;
    },
    setEndPoint: (state, end) => {
      state.endPoint = end;
    },
    setFairwayCoordinates: (state, coordinates) => {
      state.fairwayCoordinates = coordinates;
    },
    clearCurrentProfile: state => {
      state.additionalSurvey = "";
      state.currentProfile = {};
      state.minAlt = null;
      state.maxAlt = null;
      state.totalLength = null;
      state.fairwayCoordinates = [];
      state.startPoint = null;
      state.endPoint = null;
    }
  },
  actions: {
    loadProfile({ commit, state }, date_info) {
      return new Promise((resolve, reject) => {
        const profileLine = new LineString([state.startPoint, state.endPoint]);
        const geoJSON = generateFeatureRequest(
          profileLine,
          state.selectedMorph.bottleneck_id,
          date_info
        );
        HTTP.post("/cross", geoJSON, {
          headers: { "X-Gemma-Auth": localStorage.getItem("token") }
        })
          .then(response => {
            commit("profileLoaded", {
              response: response,
              surveyDate: date_info
            });
            resolve(response);
          })
          .catch(error => {
            reject(error);
          });
      });
    }
  }
};

export default FairwayProfile;