const gen_id = (length) => {
  var result = "";
  const characters =
    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
  const len = characters.length;
  for (let i = 0; i < length; i++) {
    result += characters.charAt(Math.floor(Math.random() * len));
  }
  return result;
};

Date.prototype.toJSONLocal = (function () {
  function addZ(n) {
    return (n < 10 ? "0" : "") + n;
  }
  return function () {
    return (
      this.getFullYear() +
      "-" +
      addZ(this.getMonth() + 1) +
      "-" +
      addZ(this.getDate())
    );
  };
})();

function toEncoded(string) {
  const codeUnits = Uint16Array.from(
    { length: string.length },
    (element, index) => string.charCodeAt(index)
  );
  const charCodes = new Uint8Array(codeUnits.buffer);

  let result = "";
  charCodes.forEach((char) => {
    result += String.fromCharCode(char);
  });
  return window.btoa(result);
}

function toDecoded(string) {
  let binary = window.atob(string);
  const bytes = Uint8Array.from({ length: binary.length }, (element, index) =>
    binary.charCodeAt(index)
  );
  const charCodes = new Uint16Array(bytes.buffer);

  let result = "";
  charCodes.forEach((char) => {
    result += String.fromCharCode(char);
  });
  return result;
}

const query_nominatim = (q, f) =>
  axios
    .get("/api/place/" + q)
    .then((res) => res.data)
    .then((res) => res.filter(f));
const query_flight = (q) =>
  axios.get("/api/flight/" + q).then((res) => res.data);

const is_restauration_type = (e) =>
  ["restaurant", "cafe", "pub", "bar", "fast_food", "food_court"].indexOf(
    e.type
  ) != -1;

const is_attraction_type = (e) =>
  [
    "tourism",
    "leisure",
    "place",
    "amenity",
    "highway",
    "historic",
    "natural",
    "waterway",
  ].indexOf(e.category) != -1 ||
  [
    "place_of_worship",
    "national_park",
    "nature_reserve",
    "protected_area",
  ].indexOf(e.type != -1);

const icon_type = (item) => {
  let t = item.type;
  let c = item.category;
  const arr = ["restaurant", "cafe", "pub", "bar", "fast_food", "food_court"];
  if (arr.indexOf(t) != -1) {
    return "utensils";
  } else if (t == "hotel" || t == "hostel") {
    return "bed";
  } else if (t == "museum" || c == "historic" || t == "place_of_worship") {
    return "landmark";
  } else if (t == "peak" || t == "viewpoint") {
    return "mountain";
  } else if (t == "parking") {
    return "parking";
  } else if (
    t == "water" ||
    t == "river" ||
    t == "lake" ||
    t == "torrent" ||
    t == "aquarium"
  ) {
    return "water";
  } else if (t == "community_centre" || t == "locality") {
    return "building";
  } else if (t == "attraction") {
    return "landmark";
  } else if (t == "information" || t == "university") {
    return "landmark";
  } else if (t == "bridge") {
    return "archway";
  } else if (
    t == "woodland" ||
    t == "shieling" ||
    t == "national_park" ||
    t == "zoo" ||
    t == "park" ||
    t == "garden" ||
    0
  ) {
    return "tree";
  } else if ((t == "water_park", t == "theme_park")) {
    return "dice-five";
  } else if (
    t == "?" ||
    t == "neighbourhood" ||
    t == "quarter" ||
    c == "highway"
  ) {
    return "";
  } else {
    console.log(item.display_name, item.category, item.type);
    return "question";
  }
};

Vue.component("l-map", window.Vue2Leaflet.LMap);
Vue.component("l-tile-layer", window.Vue2Leaflet.LTileLayer);
Vue.component("l-marker", window.Vue2Leaflet.LMarker);
Vue.component("l-icon", window.Vue2Leaflet.LIcon);
Vue.component("l-popup", window.Vue2Leaflet.LPopup);
Vue.component("l-tooltip", window.Vue2Leaflet.LTooltip);
Vue.component("l-control-scale", window.Vue2Leaflet.LControlScale);
Vue.component("multiselect", window.VueMultiselect.default);
Vue.use(window.VueTextareaAutosize);

const app = new Vue({
  el: "#app",
  data: {
    journey_edit:
      ["view", "short"].indexOf(window.location.pathname.split("/")[1]) == -1,
    journey_id: window.location.pathname.split("/").pop() || gen_id(16),

    journey_step_data: { day: 1, section: 0 },
    journey_data: {
      name: "New Journey",
      main: [],
    },

    query: { hotel: [], flight: [], nominatim: [] },
    querying: { hotel: false, flight: false, place: false, food: false },
    impexp: "",
    lang: {
      format: "ddd D MMM",
      formatLocale: {
        firstDayOfWeek: 1,
      },
      monthBeforeYear: true,
    },
  },
  methods: {
    start_journey: function (event) {
      window.location.href = "/" + this.journey_id;
    },
    add_section: function (event) {
      if (this.journey_data.main == undefined) this.journey_data.main = [];
      this.journey_data.main.push({
        title: "?",
        step_title: [],
        map: { zoom: 2 },
        hotel: { latlon: [0, 0] },
        places: { restaurants: [], places: [] },
      });
    },
    step_len: function (idx) {
      return this.journey_data.main[idx].dateRange
        ? (this.journey_data.main[idx].dateRange[1] -
            this.journey_data.main[idx].dateRange[0]) /
            (1000 * 60 * 60 * 24) +
            1
        : 1;
    },
    next_step: function () {
      this.journey_step_data.day += 1;
      let s = this.journey_step_data.section;
      let cd = this.step_len(s);

      if (this.journey_step_data.day > cd) {
        this.journey_step_data.section += 1;
        if (this.journey_step_data.section >= this.journey_data.main.length) {
          this.journey_step_data.section = this.journey_data.main.length - 1;
          this.journey_step_data.day = cd;
        } else {
          this.journey_step_data.day = 1;
        }
      }
    },
    prev_step: function () {
      this.journey_step_data.day -= 1;
      if (this.journey_step_data.day <= 0) {
        this.journey_step_data.section -= 1;
        if (this.journey_step_data.section < 0) {
          this.first_step();
        } else {
          let s = this.journey_step_data.section;

          let cd = this.step_len(s);
          this.journey_step_data.day = cd;
        }
      }
    },
    nextnext_step: function () {
      this.journey_step_data.section += 1;
      this.journey_step_data.day = 1;
      if (this.journey_step_data.section >= this.journey_data.main.length)
        this.first_step();
    },
    prevprev_step: function () {
      this.journey_step_data.section -= 1;
      this.journey_step_data.day = 1;
      if (this.journey_step_data.section < 0) this.first_step();
    },
    first_step: function () {
      this.journey_step_data.section = 0;
      this.journey_step_data.day = 1;
    },

    active_date: function () {
      if (this.journey_step_data.day < 0) return "?";
      if (!this.journey_data.main[this.journey_step_data.section].dateRange)
        return "?";
      var date = new Date(
        this.journey_data.main[this.journey_step_data.section].dateRange[0]
      );
      date.setDate(date.getDate() + this.journey_step_data.day - 1);
      return this.format_date(date);
    },
    format_date: function (d) {
      return (
        ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"][d.getDay()] +
        " " +
        d.getDate() +
        " " +
        [
          "Jan",
          "Feb",
          "Mar",
          "Apr",
          "May",
          "Jun",
          "Jul",
          "Aug",
          "Sep",
          "Oct",
          "Nov",
          "Dec",
        ][d.getMonth()]
      );
    },

    total_days: function () {
      if (this.journey_data.main.length == 0) return 0;
      try {
        return (
          (this.journey_data.main[this.journey_data.main.length - 1]
            .dateRange[1] -
            this.journey_data.main[0].dateRange[0]) /
          (1000 * 60 * 60 * 24)
        );
      } catch {
        return "?";
      }
    },
    total_date: function () {
      if (this.journey_data.main.length == 0) return "";
      try {
        return `${this.format_date(
          this.journey_data.main[0].dateRange[0]
        )} - ${this.format_date(
          this.journey_data.main[this.journey_data.main.length - 1].dateRange[1]
        )}`;
      } catch {
        return "?";
      }
    },
    update_date: function (idx) {
      let dateRange = this.journey_data.main[idx].dateRange;
      let start_end = [0, 0];
      let step_len = 0;

      let last_start = dateRange[0];
      for (let i = idx - 1; i >= 0; --i) {
        step_len = this.step_len(i) - 1;
        if (this.journey_data.main[i].dateRange) {
          start_end = [last_start.getDate() - step_len, last_start.getDate()];
        } else {
          this.journey_data.main[i].dateRange = [new Date(), new Date()];
          start_end = [last_start.getDate() - step_len, last_start.getDate()];
        }
        this.journey_data.main[i].dateRange[0].setTime(last_start.getTime());
        this.journey_data.main[i].dateRange[0].setDate(start_end[0]);
        this.journey_data.main[i].dateRange[1].setTime(last_start.getTime());
        this.journey_data.main[i].dateRange[1].setDate(start_end[1]);
        last_start = this.journey_data.main[i].dateRange[0];
      }

      let last_end = dateRange[1];
      for (let i = idx + 1; i < this.journey_data.main.length; ++i) {
        step_len = this.step_len(i) - 1;
        if (this.journey_data.main[i].dateRange) {
          start_end = [last_end.getDate(), last_end.getDate() + step_len];
        } else {
          this.journey_data.main[i].dateRange = [new Date(), new Date()];
          start_end = [last_end.getDate(), last_end.getDate() + step_len];
        }
        this.journey_data.main[i].dateRange[0].setTime(last_end.getTime());
        this.journey_data.main[i].dateRange[0].setDate(start_end[0]);
        this.journey_data.main[i].dateRange[1].setTime(last_end.getTime());
        this.journey_data.main[i].dateRange[1].setDate(start_end[1]);
        last_end = this.journey_data.main[i].dateRange[1];
      }
    },

    rm_section: function (idx) {
      this.journey_data.main.splice(idx, 1);
      if (this.journey_step_data.section == idx) {
        this.prevprev_step();
      }
    },
    sel_section: function (idx) {
      this.journey_step_data.section = idx;
      this.journey_step_data.day = 1;
    },
    search_nominatim: function (txt, f) {
      if (txt == "") {
        this.query.nominatim = [];
        return Promise.resolve([]);
      }
      return query_nominatim(txt, f).then((results) => {
        results.forEach((r) => {
          r.latlon = [parseFloat(r.lat), parseFloat(r.lon)];
          r.sname = r.display_name.split(",")[0];
        });
        this.query.nominatim = results;
      });
    },
    search_flight: function (txt) {
      if (txt == "") return;
      this.querying.flight = true;
      query_flight(txt.replace(" ", "")).then((results) => {
        if (results.results == "") {
          this.query.flight = [];
          this.querying.flight = false;
          return;
        }
        this.query.flight = results.results;
        this.querying.flight = false;
      });
    },
    generate_icon: function (item, fcolor) {
      return L.AwesomeMarkers.icon({
        icon: icon_type(item) || "star",
        prefix: "fa",
        markerColor: fcolor || item.color || "blue",
      }).createIcon().outerHTML;
    },

    save_data: function () {
      this.impexp = toEncoded(JSON.stringify(this.journey_data));
      axios
        .post("/api/" + this.journey_id, this.journey_data)
        .then((response) => {
          console.log("Saved...");
        })
        .catch((error) => {
          console.warn("Error! Could not reach the API.");
        });
    },
    import_data: function () {
      this.journey_data = Object.assign({}, JSON.parse(toDecoded(this.impexp)));
      this.journey_data.main.forEach((e) => {
        if (e.dateRange) {
          e.dateRange[0] = new Date(e.dateRange[0]);
          e.dateRange[1] = new Date(e.dateRange[1]);
        }
      });
    },
    export_data: function () {
      this.impexp = toEncoded(JSON.stringify(this.journey_data));
    },
    filter_selected: function (list, step) {
      return list.filter((e) =>
        step ? e.step == this.journey_step_data.day : e.step >= 0
      );
    },
    filter_unselected: function (list) {
      return list.filter((e) => e.step == undefined || e.step < 0);
    },
    remove_item: function (list, idx) {
      list[idx].step = -1;
      list.splice(idx, 1);
    },
    log: function (e) {
      console.log(e);
    },

    keyboardEvent(e) {
      if (e.which === 13) {
      }
    },
  },
  created: function () {
    window.addEventListener("keydown", (e) => {
      switch (e.key) {
        case "ArrowLeft":
          this.prev_step();
          break;
        case "ArrowRight":
          this.next_step();
          break;
        default:
          console.log(e.key);
      }
    });

    axios.get("/api/" + this.journey_id).then((response) => {
      if (response.data == "") throw "Invalid Journey Data Received";
      app.journey_data = response.data;

      for (let e of app.journey_data.main) {
        if (e.dateRange) {
          e.dateRange[0] = new Date(e.dateRange[0]);
          e.dateRange[1] = new Date(e.dateRange[1]);
        }
        e.step_title = e.step_title || [];
      }
    });

    this.debounceSave = _.debounce(this.save_data, 500);
    this.debounceSearch = {
      hotel: _.debounce((q) => {
        this.querying.hotel = true;
        this.search_nominatim(
          q,
          (r) => r.type == "hotel" || r.type == "hostel"
        ).then((r) => {
          this.querying.hotel = false;
        });
      }, 500),
      restaurants: _.debounce((q) => {
        this.querying.food = true;
        this.search_nominatim(q, (r) => is_restauration_type(r)).then((r) => {
          this.querying.food = false;
        });
      }, 500),
      places: _.debounce((q) => {
        this.querying.place = true;
        this.search_nominatim(q, (r) => is_attraction_type(r)).then((r) => {
          this.querying.place = false;
        });
      }, 500),
      other: _.debounce((q) => {
        this.querying.any = true;
        this.search_nominatim(q, (r) => true).then((r) => {
          this.querying.any = false;
        });
      }, 500),
      flight: _.debounce((q) => this.search_flight(q), 500),
    };
  },
  watch: {
    journey_data: {
      handler: function (ndata, odata) {
        this.debounceSave();
      },
      deep: true,
    },
  },
});