import React, { PropsWithChildren, useState } from "react";
import { useIntl } from "react-intl";
import cloneDeep from "lodash-es/cloneDeep";
import Mousetrap from "mousetrap";
import { useHistory } from "react-router-dom";
import { ListFilterModel } from "src/models/list-filter/filter";
import { DisplayMode } from "src/models/list-filter/types";
import * as GQL from "src/core/generated-graphql";
import {
  queryFindGroups,
  useFindGroups,
  useGroupsDestroy,
} from "src/core/StashService";
import { ItemList, ItemListContext, showWhenSelected } from "../List/ItemList";
import { ExportDialog } from "../Shared/ExportDialog";
import { DeleteEntityDialog } from "../Shared/DeleteEntityDialog";
import { GroupCardGrid } from "./GroupCardGrid";
import { EditGroupsDialog } from "./EditGroupsDialog";
import { View } from "../List/views";
import {
  IFilteredListToolbar,
  IItemListOperation,
} from "../List/FilteredListToolbar";

const GroupExportDialog: React.FC<{
  open?: boolean;
  selectedIds: Set<string>;
  isExportAll?: boolean;
  onClose: () => void;
}> = ({ open = false, selectedIds, isExportAll = false, onClose }) => {
  if (!open) {
    return null;
  }

  return (
    <ExportDialog
      exportInput={{
        groups: {
          ids: Array.from(selectedIds.values()),
          all: isExportAll,
        },
      }}
      onClose={onClose}
    />
  );
};

const filterMode = GQL.FilterMode.Groups;

function getItems(result: GQL.FindGroupsQueryResult) {
  return result?.data?.findGroups?.groups ?? [];
}

function getCount(result: GQL.FindGroupsQueryResult) {
  return result?.data?.findGroups?.count ?? 0;
}

interface IGroupListContext {
  filterHook?: (filter: ListFilterModel) => ListFilterModel;
  defaultFilter?: ListFilterModel;
  view?: View;
  alterQuery?: boolean;
  selectable?: boolean;
}

export const GroupListContext: React.FC<
  PropsWithChildren<IGroupListContext>
> = ({ alterQuery, filterHook, defaultFilter, view, selectable, children }) => {
  return (
    <ItemListContext
      filterMode={filterMode}
      defaultFilter={defaultFilter}
      useResult={useFindGroups}
      getItems={getItems}
      getCount={getCount}
      alterQuery={alterQuery}
      filterHook={filterHook}
      view={view}
      selectable={selectable}
    >
      {children}
    </ItemListContext>
  );
};

interface IGroupList extends IGroupListContext {
  fromGroupId?: string;
  onMove?: (srcIds: string[], targetId: string, after: boolean) => void;
  renderToolbar?: (props: IFilteredListToolbar) => React.ReactNode;
  otherOperations?: IItemListOperation<GQL.FindGroupsQueryResult>[];
}

export const GroupList: React.FC<IGroupList> = ({
  filterHook,
  alterQuery,
  defaultFilter,
  view,
  fromGroupId,
  onMove,
  selectable,
  renderToolbar,
  otherOperations: providedOperations = [],
}) => {
  const intl = useIntl();
  const history = useHistory();
  const [isExportDialogOpen, setIsExportDialogOpen] = useState(false);
  const [isExportAll, setIsExportAll] = useState(false);

  const otherOperations = [
    {
      text: intl.formatMessage({ id: "actions.view_random" }),
      onClick: viewRandom,
    },
    {
      text: intl.formatMessage({ id: "actions.export" }),
      onClick: onExport,
      isDisplayed: showWhenSelected,
    },
    {
      text: intl.formatMessage({ id: "actions.export_all" }),
      onClick: onExportAll,
    },
    ...providedOperations,
  ];

  function addKeybinds(
    result: GQL.FindGroupsQueryResult,
    filter: ListFilterModel
  ) {
    Mousetrap.bind("p r", () => {
      viewRandom(result, filter);
    });

    return () => {
      Mousetrap.unbind("p r");
    };
  }

  async function viewRandom(
    result: GQL.FindGroupsQueryResult,
    filter: ListFilterModel
  ) {
    // query for a random image
    if (result.data?.findGroups) {
      const { count } = result.data.findGroups;

      const index = Math.floor(Math.random() * count);
      const filterCopy = cloneDeep(filter);
      filterCopy.itemsPerPage = 1;
      filterCopy.currentPage = index + 1;
      const singleResult = await queryFindGroups(filterCopy);
      if (singleResult.data.findGroups.groups.length === 1) {
        const { id } = singleResult.data.findGroups.groups[0];
        // navigate to the group page
        history.push(`/groups/${id}`);
      }
    }
  }

  async function onExport() {
    setIsExportAll(false);
    setIsExportDialogOpen(true);
  }

  async function onExportAll() {
    setIsExportAll(true);
    setIsExportDialogOpen(true);
  }

  function renderContent(
    result: GQL.FindGroupsQueryResult,
    filter: ListFilterModel,
    selectedIds: Set<string>,
    onSelectChange: (id: string, selected: boolean, shiftKey: boolean) => void
  ) {
    return (
      <>
        <GroupExportDialog
          open={isExportDialogOpen}
          selectedIds={selectedIds}
          isExportAll={isExportAll}
          onClose={() => setIsExportDialogOpen(false)}
        />
        {filter.displayMode === DisplayMode.Grid && (
          <GroupCardGrid
            groups={result.data?.findGroups.groups ?? []}
            zoomIndex={filter.zoomIndex}
            selectedIds={selectedIds}
            onSelectChange={onSelectChange}
            fromGroupId={fromGroupId}
            onMove={onMove}
          />
        )}
      </>
    );
  }

  function renderEditDialog(
    selectedGroups: GQL.GroupDataFragment[],
    onClose: (applied: boolean) => void
  ) {
    return <EditGroupsDialog selected={selectedGroups} onClose={onClose} />;
  }

  function renderDeleteDialog(
    selectedGroups: GQL.SlimGroupDataFragment[],
    onClose: (confirmed: boolean) => void
  ) {
    return (
      <DeleteEntityDialog
        selected={selectedGroups}
        onClose={onClose}
        singularEntity={intl.formatMessage({ id: "group" })}
        pluralEntity={intl.formatMessage({ id: "groups" })}
        destroyMutation={useGroupsDestroy}
      />
    );
  }

  return (
    <GroupListContext
      alterQuery={alterQuery}
      filterHook={filterHook}
      view={view}
      defaultFilter={defaultFilter}
      selectable={selectable}
    >
      <ItemList
        view={view}
        otherOperations={otherOperations}
        addKeybinds={addKeybinds}
        renderContent={renderContent}
        renderEditDialog={renderEditDialog}
        renderDeleteDialog={renderDeleteDialog}
        renderToolbar={renderToolbar}
      />
    </GroupListContext>
  );
};