{% extends "admin/base_site.html" %}
{% load static i18n %}
{% block title %}{% trans "Django Log Viewer" %} - {{ block.super }}{% endblock %}

{% block bodyclass %}change-list-page log-viewer-page{% endblock %}

{% block breadcrumbs %}
  <div class="breadcrumbs">
    <a href="{% url 'admin:index' %}">{% trans 'Home' %}</a>
    &rsaquo;
    <a href="{% url 'log_viewer:log_file_view' %}">{% if custom_file_list_title %}{{ custom_file_list_title }}{% else %}{% trans "Django Log Viewer" %}{% endif %}</a>
  </div>
{% endblock %}

{% block extrastyle %}
  {{ block.super }}
  <link rel="stylesheet" type="text/css" href="{% static 'admin/css/changelists.css' %}">
  <link rel="stylesheet" type="text/css" href="{% static 'log_viewer/css/jquery.dataTables.min.css' %}">
  <link rel="stylesheet" type="text/css" href="{% static 'log_viewer/css/log-viewer.css' %}">
  <link rel="stylesheet" href="{% static 'lucus/css/third_party/log_viewer.css' %}">

  {% if custom_style_file %}
    <link type="text/css" href="{{ custom_style_file }}" rel="stylesheet">
  {% endif %}
{% endblock %}

{% block extrahead %}
  {{ block.super }}
  <script src="{% static 'log_viewer/js/jquery.min.js' %}"></script>
  <script src="{% static 'log_viewer/js/jquery.dataTables.min.js' %}"></script>
{% endblock %}

{% block content %}
<!------------------- Log viewer (changelist shell) ------------------->
  <div id="content-main" class="lucus-page__main lucus-log-viewer">
    <div class="module lucus-changelist filtered" id="changelist">
      <div class="lucus-changelist__layout">
        <div class="lucus-changelist__main-column">
          <form id="changelist-form" class="changelist-form-container">
            <div class="results">
              <div class="lucus-results-scroll">
                <div class="headers">
                  <h1 class="lucus-changelist__title pull-left">{% if custom_file_list_title %}{{ custom_file_list_title }}{% else %}{% trans "Django Log Viewer" %}{% endif %}</h1>
                  <div class="download-buttons">
                    <a href="{% url 'log_viewer:log_download_zip_view' %}" class="btn-download pull-right">{% trans "Download all Log Files" %}</a>
                    <a href="{% url 'log_viewer:log_download_file_view' %}" class="btn-download pull-right btn-download-this-log" style="display:none">{% trans "Download this Log File" %}</a>
                  </div>
                </div>
                <table id="log-entries" class="display" style="width:100%">
                  <thead>
                    <tr>
                      <th scope="col">{% trans 'No.' %}</th>
                      <th scope="col">{% trans 'Log entries' %}</th>
                    </tr>
                  </thead>
                  <tbody>
                    <tr><td colspan="2">{% trans 'No entries!' %}</td></tr>
                  </tbody>
                </table>
              </div>
            </div>
          </form>
        </div>
        <aside class="lucus-changelist__aside" aria-label="{% trans 'Log Files' %}">
          <header class="lucus-changelist__aside-header">
            <span class="lucus-changelist__aside-title">{% trans 'Log Files' %}</span>
          </header>
          <div class="lucus-changelist__aside-body">
            <table id="log-files-list" class="display" style="width:100%">
              <tbody>
                <tr><td colspan="2">{% trans 'No entries!' %}</td></tr>
              </tbody>
            </table>
          </div>
        </aside>
      </div>
    </div>
  </div>
<!----------------------- END LOG VIEWER MARKUP ----------------------->

  <script>
    var entityMap = {
      '&': '&amp;',
      '<': '&lt;',
      '>': '&gt;',
      '"': '&quot;',
      "'": '&#39;',
      '/': '&#x2F;',
      '`': '&#x60;',
      '=': '&#x3D;'
    };
    function escapeHtml (string) {
      return String(string).replace(/[&<>"'`=\/]/g, function fromEntityMap (s) {
        return entityMap[s];
      });
    }

    function loadDataTable(table_name, url_json) {
      $(table_name).DataTable({
        pageLength: {{ page_length }},
        columns: [{data: 0}, {data: 1}],
        ajax: function (data, callback, settings) {
          $.ajax({
            type: 'get',
            url: url_json,
            success:function(response){
                const new_logs = [];
                var next_page = response.next_page || 1;

                try {
                    response.logs.forEach(function(text, numb, logs){
                      text = escapeHtml(text);
                      new_logs.push([numb+1, text]);
                    });
                } catch {
                    console.warn("This log file doesn't exist");
                }


                callback({
                  data: new_logs,
                  recordsTotal: next_page,
                  recordsFiltered: next_page
                });
            }
          });
        }
      });
    }

    function loadDataTableFiles(table_name, url_json) {
      $(table_name).DataTable({
        pageLength: {{ files_per_page }},
        columns: [{data: 1}],
        ajax: function (data, callback, settings) {
          $.ajax({
            type: 'get',
            url: url_json,
            success:function(response){
                const new_logs = [];
                let next_page = response.next_page_files || 1;
                response.log_files.forEach(function(logs, numb){
                    const keys = Object.keys(logs);
                    Object.entries(logs).forEach(([file_name, xtra]) => {
                        logs = '<a class="btn-load-json-log" href="javascript:;" '+
                                   'data-file-name="'+file_name+'" '+
                                   'data-href="'+url_json+file_name+'">'+xtra.display+'</a>'
                    });
                    new_logs.push([numb+1, logs]);
                });

                callback({
                  data: new_logs,
                  recordsTotal: next_page,
                  recordsFiltered: next_page
                });
            }
          });
        }
      });
    }

    function loadDataTableTrigger(url_json) {
      var table_name ='table#log-entries';
      if (!$.fn.dataTable.isDataTable(table_name)) {
        loadDataTable(table_name, url_json);
      }else {
        table_dt = $(table_name).DataTable();
        table_dt.destroy();
        loadDataTable(table_name, url_json);
      }
    }

    $(document).ready(function() {
        var url_json = "{% url 'log_viewer:log_json_view' xxxxx %}";
        var table_name ='table#log-files-list';
        loadDataTableFiles(table_name, url_json);
        let params = new URLSearchParams(window.location.search);
        loadDataTableTrigger(params.get("file"))

    });

    $(document).on('click', '.btn-load-json-log', function(){
        $(this).closest('#log-files-list').find('li').removeClass('selected');
        $(this).closest('li').addClass('selected');
        loadDataTableTrigger($(this).data('href'));

        let btnDownloadSingleFile = $('.btn-download-this-log');
        let file_name = $(this).data('file-name');
        var href = btnDownloadSingleFile.attr('href');

        if(href.indexOf('file_name') > -1) {
          href = href.replace(/\bfile_name=(.*)\b/, 'file_name=' + file_name)
        }else {
          href = href + '?file_name='+ file_name
        }

        btnDownloadSingleFile.attr('href', href);
        btnDownloadSingleFile.show();
    });
  </script>
{% endblock %}