/* Pi-hole: A black hole for Internet advertisements
 *  (c) 2017 Pi-hole, LLC (https://pi-hole.net)
 *  Network-wide ad blocking via your own hardware.
 *
 *  This file is copyright under the latest version of the EUPL.
 *  Please see LICENSE file for your rights under this license. */

/* global utils:false, groups:false, apiFailure:false, updateFtlInfo:false, getGroups:false, processGroupResult:false */
/* exported initTable */

var table;
var GETDict = {};

$(function () {
  GETDict = utils.parseQueryString();

  $("#btnAddAllow").on("click", { type: "allow" }, addList);
  $("#btnAddBlock").on("click", { type: "block" }, addList);

  utils.setBsSelectDefaults();
  getGroups();
});

function format(data) {
  // Generate human-friendly status string
  var statusText = "Unknown";
  var numbers = true;
  if (data.status !== null) {
    switch (parseInt(data.status, 10)) {
      case 0:
        statusText =
          data.enabled === 0
            ? "List is disabled and not checked"
            : "List was not downloaded so far";
        numbers = false;
        break;
      case 1:
        statusText = 'List download was successful (<span class="list-status-1">OK</span>)';
        break;
      case 2:
        statusText =
          'List unchanged upstream, Pi-hole used a local copy (<span class="list-status-2">OK</span>)';
        break;
      case 3:
        statusText =
          'List unavailable, Pi-hole used a local copy (<span class="list-status-3">check list</span>)';
        break;
      case 4:
        statusText =
          'List unavailable, there is no local copy of this list available on your Pi-hole (<span class="list-status-4">replace list</span>)';
        numbers = false;
        break;

      default:
        statusText =
          'Unknown (<span class="list-status-0">' + parseInt(data.status, 10) + "</span>)";
        break;
    }
  }

  // Compile extra info for displaying
  return (
    "<table>" +
    '<tr class="dataTables-child"><td>Type of this list:</td><td>' +
    data.type +
    'list</td><tr class="dataTables-child"><td>Health status of this list:</td><td>' +
    statusText +
    '</td></tr><tr class="dataTables-child"><td>This list was added to Pi-hole&nbsp;&nbsp;</td><td>' +
    utils.datetimeRelative(data.date_added) +
    "&nbsp;(" +
    utils.datetime(data.date_added, false) +
    ')</td></tr><tr class="dataTables-child"><td>Database entry was last modified&nbsp;&nbsp;</td><td>' +
    utils.datetimeRelative(data.date_modified) +
    "&nbsp;(" +
    utils.datetime(data.date_modified, false) +
    ')</td></tr><tr class="dataTables-child"><td>The list contents were last updated&nbsp;&nbsp;</td><td>' +
    (data.date_updated > 0
      ? utils.datetimeRelative(data.date_updated) +
        "&nbsp;(" +
        utils.datetime(data.date_updated, false) +
        ")"
      : "N/A") +
    '</td></tr><tr class="dataTables-child"><td>Number of entries on this list:&nbsp;&nbsp;</td><td>' +
    (data.number !== null && numbers === true
      ? parseInt(data.number, 10).toLocaleString()
      : "N/A") +
    (data.abp_entries !== null && parseInt(data.abp_entries, 10) > 0 && numbers === true
      ? " (out of which " + parseInt(data.abp_entries, 10).toLocaleString() + " are in ABP-style)"
      : "") +
    '</td></tr><tr class="dataTables-child"' +
    "><td>Number of non-domains on this list:&nbsp;&nbsp;</td>" +
    "<td>" +
    (data.invalid_domains !== null && numbers === true
      ? parseInt(data.invalid_domains, 10).toLocaleString()
      : "N/A") +
    '</td></tr><tr class="dataTables-child"><td>Database ID of this list:</td><td>' +
    data.id +
    "</td></tr></table>"
  );
}

// eslint-disable-next-line no-unused-vars
function initTable() {
  table = $("#listsTable").DataTable({
    processing: true,
    ajax: {
      url: "/api/lists",
      dataSrc: "lists",
      type: "GET",
    },
    order: [[0, "asc"]],
    columns: [
      { data: "id", visible: false },
      { data: null, visible: true, orderable: false, width: "15px" },
      { data: "status", searchable: false, class: "details-control" },
      { data: "address" },
      { data: "enabled", searchable: false },
      { data: "comment" },
      { data: "groups", searchable: false },
      { data: null, width: "22px", orderable: false },
    ],
    columnDefs: [
      {
        targets: 1,
        className: "select-checkbox",
        render: function () {
          return "";
        },
      },
      {
        targets: "_all",
        render: $.fn.dataTable.render.text(),
      },
    ],
    drawCallback: function () {
      // Hide buttons if all lists were deleted
      var hasRows = this.api().rows({ filter: "applied" }).data().length > 0;
      $(".datatable-bt").css("visibility", hasRows ? "visible" : "hidden");

      $('button[id^="deleteList_"]').on("click", deleteList);
      // Remove visible dropdown to prevent orphaning
      $("body > .bootstrap-select.dropdown").remove();
    },
    rowCallback: function (row, data) {
      var dataId = utils.hexEncode(data.address);
      $(row).attr("data-id", dataId);
      $(row).attr("data-type", data.type);

      var statusCode = 0,
        statusIcon;
      // If there is no status or the list is disabled, we keep
      // status 0 (== unknown)
      if (data.status !== null && data.enabled) {
        statusCode = parseInt(data.status, 10);
      }

      switch (statusCode) {
        case 1:
          statusIcon = "fa-check";
          break;
        case 2:
          statusIcon = "fa-history";
          break;
        case 3:
          statusIcon = "fa-exclamation-circle";
          break;
        case 4:
          statusIcon = "fa-times";
          break;
        default:
          statusIcon = "fa-question-circle";
          break;
      }

      // Add red minus sign icon if data["type"] is "block"
      // Add green plus sign icon if data["type"] is "allow"
      let status =
        "<i class='fa fa-fw fa-question-circle text-orange' title='This list is of unknown type'></i>";
      if (data.type === "block") {
        status = "<i class='fa fa-fw fa-minus text-red' title='This is a blocklist'></i>";
      } else if (data.type === "allow") {
        status = "<i class='fa fa-fw fa-plus text-green' title='This is an allowlist'></i>";
      }

      $("td:eq(1)", row).addClass("list-status-" + statusCode);
      $("td:eq(1)", row).html(
        "<i class='fa fa-fw " +
          statusIcon +
          "' title='Click for details about this list'></i>" +
          status
      );

      if (data.address.startsWith("file://")) {
        // Local files cannot be downloaded from a distant client so don't show
        // a link to such a list here
        $("td:eq(2)", row).html(
          '<code id="address_' + dataId + '" class="breakall">' + data.address + "</code>"
        );
      } else {
        $("td:eq(2)", row).html(
          '<a id="address_' +
            dataId +
            '" class="breakall" href="' +
            data.address +
            '" target="_blank" rel="noopener noreferrer">' +
            data.address +
            "</a>"
        );
      }

      $("td:eq(3)", row).html(
        '<input type="checkbox" id="enabled_' +
          dataId +
          '"' +
          (data.enabled ? " checked" : "") +
          ">"
      );
      var statusEl = $("#enabled_" + dataId, row);
      statusEl.bootstrapToggle({
        on: "Enabled",
        off: "Disabled",
        size: "small",
        onstyle: "success",
        width: "80px",
      });
      statusEl.on("change", editList);

      $("td:eq(4)", row).html('<input id="comment_' + dataId + '" class="form-control">');
      var commentEl = $("#comment_" + dataId, row);
      commentEl.val(utils.unescapeHtml(data.comment));
      commentEl.on("change", editList);

      $("td:eq(5)", row).empty();
      $("td:eq(5)", row).append(
        '<select class="selectpicker" id="multiselect_' + dataId + '" multiple></select>'
      );
      var selectEl = $("#multiselect_" + dataId, row);
      // Add all known groups
      for (var i = 0; i < groups.length; i++) {
        var dataSub = "";
        if (!groups[i].enabled) {
          dataSub = 'data-subtext="(disabled)"';
        }

        selectEl.append(
          $("<option " + dataSub + "/>")
            .val(groups[i].id)
            .text(groups[i].name)
        );
      }

      // Select assigned groups
      selectEl.val(data.groups);
      // Initialize bootstrap-select
      selectEl
        // fix dropdown if it would stick out right of the viewport
        .on("show.bs.select", function () {
          var winWidth = $(window).width();
          var dropdownEl = $("body > .bootstrap-select.dropdown");
          if (dropdownEl.length > 0) {
            dropdownEl.removeClass("align-right");
            var width = dropdownEl.width();
            var left = dropdownEl.offset().left;
            if (left + width > winWidth) {
              dropdownEl.addClass("align-right");
            }
          }
        })
        .on("changed.bs.select", function () {
          // enable Apply button
          if ($(applyBtn).prop("disabled")) {
            $(applyBtn)
              .addClass("btn-success")
              .prop("disabled", false)
              .on("click", function () {
                editList.call(selectEl);
              });
          }
        })
        .on("hide.bs.select", function () {
          // Restore values if drop-down menu is closed without clicking the Apply button
          if (!$(applyBtn).prop("disabled")) {
            $(this).val(data.groups).selectpicker("refresh");
            $(applyBtn).removeClass("btn-success").prop("disabled", true).off("click");
          }
        })
        .selectpicker()
        .siblings(".dropdown-menu")
        .find(".bs-actionsbox")
        .prepend(
          '<button type="button" id=btn_apply_' +
            dataId +
            ' class="btn btn-block btn-sm" disabled>Apply</button>'
        );

      var applyBtn = "#btn_apply_" + dataId;

      // Highlight row (if url parameter "listid=" is used)
      if ("listid" in GETDict && data.id === parseInt(GETDict.listid, 10)) {
        $(row).find("td").addClass("highlight");
      }

      var button =
        '<button type="button" class="btn btn-danger btn-xs" id="deleteList_' +
        dataId +
        '" data-id="' +
        dataId +
        '">' +
        '<span class="far fa-trash-alt"></span>' +
        "</button>";
      $("td:eq(6)", row).html(button);
    },
    dom:
      "<'row'<'col-sm-6'l><'col-sm-6'f>>" +
      "<'row'<'col-sm-3'B><'col-sm-9'p>>" +
      "<'row'<'col-sm-12'<'table-responsive'tr>>>" +
      "<'row'<'col-sm-3'B><'col-sm-9'p>>" +
      "<'row'<'col-sm-12'i>>",
    lengthMenu: [
      [10, 25, 50, 100, -1],
      [10, 25, 50, 100, "All"],
    ],
    select: {
      style: "multi",
      selector: "td:not(:last-child)",
      info: false,
    },
    buttons: [
      {
        text: '<span class="far fa-square"></span>',
        titleAttr: "Select All",
        className: "btn-sm datatable-bt selectAll",
        action: function () {
          table.rows({ page: "current" }).select();
        },
      },
      {
        text: '<span class="far fa-plus-square"></span>',
        titleAttr: "Select All",
        className: "btn-sm datatable-bt selectMore",
        action: function () {
          table.rows({ page: "current" }).select();
        },
      },
      {
        extend: "selectNone",
        text: '<span class="far fa-check-square"></span>',
        titleAttr: "Deselect All",
        className: "btn-sm datatable-bt removeAll",
      },
      {
        text: '<span class="far fa-trash-alt"></span>',
        titleAttr: "Delete Selected",
        className: "btn-sm datatable-bt deleteSelected",
        action: function () {
          // For each ".selected" row ...
          var ids = [];
          $("tr.selected").each(function () {
            // ... add the row identified by "data-id".
            ids.push($(this).attr("data-id"));
          });
          // Delete all selected rows at once
          delItems(ids);
        },
      },
    ],
    stateSave: true,
    stateDuration: 0,
    stateSaveCallback: function (settings, data) {
      utils.stateSaveCallback("groups-lists-table", data);
    },
    stateLoadCallback: function () {
      var data = utils.stateLoadCallback("groups-lists-table");

      // Return if not available
      if (data === null) {
        return null;
      }

      // Reset visibility of ID column
      data.columns[0].visible = false;
      // Apply loaded state to table
      return data;
    },
    initComplete: function () {
      if ("listid" in GETDict) {
        var pos = table
          .column(0, { order: "current" })
          .data()
          .indexOf(parseInt(GETDict.listid, 10));
        if (pos >= 0) {
          var page = Math.floor(pos / table.page.info().length);
          table.page(page).draw(false);
        }
      }
    },
  });

  table.on("init select deselect", function () {
    utils.changeBulkDeleteStates(table);
  });

  table.on("order.dt", function () {
    var order = table.order();
    if (order[0][0] !== 0 || order[0][1] !== "asc") {
      $("#resetButton").removeClass("hidden");
    } else {
      $("#resetButton").addClass("hidden");
    }
  });

  $("#resetButton").on("click", function () {
    table.order([[0, "asc"]]).draw();
    $("#resetButton").addClass("hidden");
  });

  // Add event listener for opening and closing details
  $("#listsTable tbody").on("click", "td.details-control", function () {
    var tr = $(this).closest("tr");
    var row = table.row(tr);

    if (row.child.isShown()) {
      // This row is already open - close it
      row.child.hide();
      tr.removeClass("shown");
    } else {
      // Open this row
      row.child(format(row.data())).show();
      tr.addClass("shown");
    }
  });

  // Disable autocorrect in the search box
  var input = document.querySelector("input[type=search]");
  if (input !== null) {
    input.setAttribute("autocomplete", "off");
    input.setAttribute("autocorrect", "off");
    input.setAttribute("autocapitalize", "off");
    input.setAttribute("spellcheck", false);
  }
}

// Remove 'bnt-group' class from container, to avoid grouping
$.fn.dataTable.Buttons.defaults.dom.container.className = "dt-buttons";

function deleteList() {
  // Passes the button data-id attribute as ID
  const ids = [$(this).attr("data-id")];
  delItems(ids);
}

function delItems(ids) {
  // Check input validity
  if (!Array.isArray(ids)) return;

  // Get first element from array
  const addressRaw = ids[0];
  const address = utils.hexDecode(addressRaw);

  // Remove first element from array
  ids.shift();

  utils.disableAll();
  const idstring = ids.join(", ");
  utils.showAlert("info", "", "Deleting list(s) ...", "<ul>" + address + "</ul>");

  $.ajax({
    url: "/api/lists/" + encodeURIComponent(address),
    method: "delete",
  })
    .done(function () {
      utils.enableAll();
      utils.showAlert("success", "far fa-trash-alt", "Successfully deleted list: ", address);
      table.row(addressRaw).remove().draw(false);
      if (ids.length > 0) {
        // Recursively delete all remaining items
        delItems(ids);
        return;
      }

      table.ajax.reload(null, false);

      // Clear selection after deletion
      table.rows().deselect();
      utils.changeBulkDeleteStates(table);

      // Update number of lists in the sidebar
      updateFtlInfo();
    })
    .fail(function (data, exception) {
      apiFailure(data);
      utils.enableAll();
      utils.showAlert("error", "", "Error while deleting list(s): " + idstring, data.responseText);
      console.log(exception); // eslint-disable-line no-console
    });
}

function addList(event) {
  const type = event.data.type;
  const comment = utils.escapeHtml($("#new_comment").val());

  // Check if the user wants to add multiple domains (space or newline separated)
  // If so, split the input and store it in an array
  var addresses = utils.escapeHtml($("#new_address").val()).split(/[\s,]+/);
  // Remove empty elements
  addresses = addresses.filter(function (el) {
    return el !== "";
  });
  const addressestr = JSON.stringify(addresses);

  utils.disableAll();
  utils.showAlert("info", "", "Adding subscribed " + type + "list(s)...", addressestr);

  if (addresses.length === 0) {
    // enable the ui elements again
    utils.enableAll();
    utils.showAlert("warning", "", "Warning", "Please specify " + type + "list address");
    return;
  }

  $.ajax({
    url: "/api/lists",
    method: "post",
    dataType: "json",
    processData: false,
    data: JSON.stringify({ address: addresses, comment: comment, type: type }),
    success: function (data) {
      utils.enableAll();
      utils.listsAlert("list", addresses, data);
      $("#new_address").val("");
      $("#new_comment").val("");
      table.ajax.reload(null, false);
      table.rows().deselect();

      // Update number of groups in the sidebar
      updateFtlInfo();
    },
    error: function (data, exception) {
      apiFailure(data);
      utils.enableAll();
      utils.showAlert("error", "", "Error while adding new " + type + "list", data.responseText);
      console.log(exception); // eslint-disable-line no-console
    },
  });
}

function editList() {
  const elem = $(this).attr("id");
  const tr = $(this).closest("tr");
  const type = tr.attr("data-type");
  const address = tr.attr("data-id");
  const enabled = tr.find("#enabled_" + address).is(":checked");
  const comment = utils.escapeHtml(tr.find("#comment_" + address).val());
  // Convert list of string integers to list of integers using map(Number)
  const groups = tr
    .find("#multiselect_" + address)
    .val()
    .map(Number);

  var done = "edited";
  var notDone = "editing";
  switch (elem) {
    case "enabled_" + address:
      if (!enabled) {
        done = "disabled";
        notDone = "disabling";
      } else {
        done = "enabled";
        notDone = "enabling";
      }

      break;
    case "comment_" + address:
      done = "edited comment of";
      notDone = "editing comment of";
      break;
    case "multiselect_" + address:
      done = "edited groups of";
      notDone = "editing groups of";
      break;
    default:
      alert("bad element (" + elem + ") or invalid data-id!");
      return;
  }

  utils.disableAll();
  const addressDecoded = utils.hexDecode(address);
  utils.showAlert("info", "", "Editing address...", addressDecoded);
  $.ajax({
    url: "/api/lists/" + encodeURIComponent(addressDecoded),
    method: "put",
    dataType: "json",
    processData: false,
    data: JSON.stringify({
      groups: groups,
      comment: comment,
      enabled: enabled,
      type: type,
    }),
    success: function (data) {
      utils.enableAll();
      processGroupResult(data, "list", done, notDone);
      table.ajax.reload(null, false);
    },
    error: function (data, exception) {
      apiFailure(data);
      utils.enableAll();
      utils.showAlert(
        "error",
        "",
        "Error while " + notDone + " list " + addressDecoded,
        data.responseText
      );
      console.log(exception); // eslint-disable-line no-console
    },
  });
}