'use strict'
import 'lodash/lodash'

window.addEventListener('load', () => {
  const maxFormatCount = 20;

  new Vue({
    el: "#in_tail_format",
    props: ["formatOptionsJson", "initialSelected", "targetFile", "paramsJson"],
    data: {
      previewProcessing: false,
      format: "",
      highlightedLines: null,
    },

    computed: {
      options: {
        get: function(){
          return this.formatOptions[this.format];
        },
      },
      selectableFormats: {
        get: function() {
          return Object.keys(this.formatOptions);
        }
      },
      useTextArea: function() {
        return this.format === "multiline";
      }
    },

    beforeMount: function() {
      this.formatOptions = JSON.parse(this.$el.attributes.formatOptionsJson.nodeValue);
      this.format = this.$el.attributes.initialSelected.nodeValue;

      // initialize params
      // NOTE: if `params.setting.foo` is undefined, Vue can't binding with v-model="params.setting.foo"
      var params = JSON.parse(this.$el.attributes.paramsJson.nodeValue);
      if(!params.setting) {
        params.setting = {};
      }

      var formats = _.chain(_.range(1, maxFormatCount + 1)).map(function(i) {return params.setting["format" + String(i)];}).compact().value();
      params.setting.formats = formats.join("\n");

      _.each(this.formatOptions, function(options){
        _.each(options, function(key){
          if(!params.setting.hasOwnProperty(key)){
            params.setting[key] = "";
          }
        });
      });
      this.params = params;

      this.targetFile = this.$el.attributes.targetFile.nodeValue;
    },
    mounted: function(){
      this.$emit("data-loaded");
    },

    watch: {
      'params.setting.formats': function(formats) {
        _.range(1, maxFormatCount + 1).forEach(()=> {params.setting["format" + String(i)] = "";});

        _.compact(formats.split("\n")).forEach((formatLine, index)=> {
          params.setting["format" + String(index + 1)] = formatLine;
        })
      },
      'params.setting.regexp': function() {
        this.preview();
      },
      'format': function() {
        this.preview();
      },
    },

    methods: {
      onKeyup: function(ev){
        var el = ev.target;
        if(el.name.match(/\[format/)){
          this.preview();
        }
      },
      updateHighlightedLines: function() {
        if(!this.regexpMatches) {
          this.highlightedLines = null;
          return;
        }

        var $container = jQuery('<div>');
        _.each(this.regexpMatches, function(match){
          var colors = [
            "#ff9", "#cff", "#fcf", "#dfd"
          ];
          var whole = match.whole;
          var html = "";
          var matches = [];

          var lastPos = 0;
          _.each(match.matches, function(match) {
            var matched = match.matched;
            if(!matched) return;
            if(matched.length === 0) return; // Ignore empty matched with "foobar".match(/foo(.*?)bar/)[1] #=> ""

            // rotated highlight color
            var currentColor = colors.shift();
            colors.push(currentColor);

            // create highlighted range HTML
            var $highlighted = jQuery('<span>').text(matched);
            $highlighted.attr({
              "class": "regexp-preview",
              "data-toggle": "tooltip",
              "data-placement": "top",
              "title": match.key,
              'style': 'background-color:' + currentColor
            });
            var highlightedHtml = $highlighted.wrap('<div>').parent().html();

            var pos = {
              "start": match.pos[0],
              "end": match.pos[1]
            };
            if(pos.start > 0) {
              html += _.escape(whole.substring(lastPos, pos.start));
            }
            html += highlightedHtml;
            lastPos = pos.end;
          });
          html += whole.substring(lastPos);

          $container.append(html);
          $container.append("<br />");
        });

        this.highlightedLines = $container.html();
      },

      preview: function(){
        if(this.previewAjax) {
          this.previewAjax.abort();
        }

        const token = document.getElementsByName("csrf-token")[0].getAttribute('content')

        var self = this;
        new Promise(function(resolve, reject) {
          self.previewAjax = $.ajax({
            method: "POST",
            url: "/api/regexp_preview",
            headers: {
              'X-CSRF-Token': token
            },
            data: {
              regexp: self.params.setting.regexp,
              time_format: self.params.setting.time_format,
              format: _.isEmpty(self.format) ? "regexp" : self.format,
              params: self.params.setting,
              file: self.targetFile
            }
          }).done(resolve).fail(reject);
        }).then(function(result){
          self.params = _.merge(self.params, result.params);
          self.regexpMatches = result.matches;
          self.updateHighlightedLines();
        })["catch"](function(error){
          if(error.stack) {
            console.error(error.stack);
          }
        });
      },
    }
  });
});