import { observer } from "mobx-react";
import {
  TableOfContentsIcon,
  EditIcon,
  PlusIcon,
  MoonIcon,
  MoreIcon,
  SunIcon,
} from "outline-icons";
import * as React from "react";
import { useTranslation } from "react-i18next";
import { Link } from "react-router-dom";
import styled from "styled-components";
import { Theme } from "~/stores/UiStore";
import Document from "~/models/Document";
import { Action, Separator } from "~/components/Actions";
import Badge from "~/components/Badge";
import Button from "~/components/Button";
import Collaborators from "~/components/Collaborators";
import DocumentBreadcrumb from "~/components/DocumentBreadcrumb";
import Header from "~/components/Header";
import Tooltip from "~/components/Tooltip";
import useMobile from "~/hooks/useMobile";
import useMouseMove from "~/hooks/useMouseMove";
import usePolicy from "~/hooks/usePolicy";
import useStores from "~/hooks/useStores";
import DocumentMenu from "~/menus/DocumentMenu";
import NewChildDocumentMenu from "~/menus/NewChildDocumentMenu";
import TableOfContentsMenu from "~/menus/TableOfContentsMenu";
import TemplatesMenu from "~/menus/TemplatesMenu";
import { NavigationNode } from "~/types";
import { metaDisplay } from "~/utils/keyboard";
import { newDocumentPath, editDocumentUrl } from "~/utils/routeHelpers";
import FadeOut from "./FadeOut";
import ObservingBanner from "./ObservingBanner";
import PublicBreadcrumb from "./PublicBreadcrumb";
import ShareButton from "./ShareButton";

type Props = {
  document: Document;
  documentHasHeadings: boolean;
  sharedTree: NavigationNode | undefined;
  shareId: string | null | undefined;
  isDraft: boolean;
  isEditing: boolean;
  isFocusing: boolean;
  isRevision: boolean;
  isSaving: boolean;
  isPublishing: boolean;
  publishingIsDisabled: boolean;
  savingIsDisabled: boolean;
  onSelectTemplate: (template: Document) => void;
  onSave: (options: {
    done?: boolean;
    publish?: boolean;
    autosave?: boolean;
  }) => void;
  headings: {
    title: string;
    level: number;
    id: string;
  }[];
};

function DocumentHeader({
  document,
  documentHasHeadings,
  shareId,
  isEditing,
  isDraft,
  isPublishing,
  isRevision,
  isFocusing,
  isSaving,
  savingIsDisabled,
  publishingIsDisabled,
  sharedTree,
  onSelectTemplate,
  onSave,
  headings,
}: Props) {
  const { t } = useTranslation();
  const { ui, auth } = useStores();
  const { resolvedTheme } = ui;
  const { team } = auth;
  const isMobile = useMobile();
  const isMouseMoving = useMouseMove();
  const hideHeader = isFocusing && !isMouseMoving;

  // We cache this value for as long as the component is mounted so that if you
  // apply a template there is still the option to replace it until the user
  // navigates away from the doc
  const [isNew] = React.useState(document.isPersistedOnce);

  const handleSave = React.useCallback(() => {
    onSave({
      done: true,
    });
  }, [onSave]);

  const handlePublish = React.useCallback(() => {
    onSave({
      done: true,
      publish: true,
    });
  }, [onSave]);

  const { isDeleted, isTemplate } = document;
  const can = usePolicy(document.id);
  const canToggleEmbeds = team?.documentEmbeds;
  const canEdit = can.update && !isEditing;
  const toc = (
    <Tooltip
      tooltip={ui.tocVisible ? t("Hide contents") : t("Show contents")}
      shortcut="ctrl+alt+h"
      delay={250}
      placement="bottom"
    >
      <Button
        onClick={
          ui.tocVisible ? ui.hideTableOfContents : ui.showTableOfContents
        }
        icon={<TableOfContentsIcon />}
        iconColor="currentColor"
        borderOnHover
        neutral
      />
    </Tooltip>
  );
  const editAction = (
    <Action>
      <Tooltip
        tooltip={t("Edit {{noun}}", {
          noun: document.noun,
        })}
        shortcut="e"
        delay={500}
        placement="bottom"
      >
        <Button
          as={Link}
          icon={<EditIcon />}
          to={editDocumentUrl(document)}
          neutral
        >
          {t("Edit")}
        </Button>
      </Tooltip>
    </Action>
  );
  const appearanceAction = (
    <Action>
      <Tooltip
        tooltip={
          resolvedTheme === "light" ? t("Switch to dark") : t("Switch to light")
        }
        delay={500}
        placement="bottom"
      >
        <Button
          icon={resolvedTheme === "light" ? <SunIcon /> : <MoonIcon />}
          onClick={() =>
            ui.setTheme(resolvedTheme === "light" ? Theme.Dark : Theme.Light)
          }
          neutral
          borderOnHover
        />
      </Tooltip>
    </Action>
  );

  const DocumentMenuLabel = React.useCallback(
    (props) => (
      <Button
        icon={<MoreIcon />}
        iconColor="currentColor"
        {...props}
        borderOnHover
        neutral
      />
    ),
    []
  );

  const NewChildDocLabel = React.useCallback(
    (props) => (
      <Tooltip
        tooltip={t("New document")}
        shortcut="n"
        delay={500}
        placement="bottom"
      >
        <Button icon={<PlusIcon />} {...props} neutral>
          {t("New doc")}
        </Button>
      </Tooltip>
    ),
    [t]
  );

  if (shareId) {
    return (
      <Header
        title={document.title}
        hasSidebar={!!sharedTree}
        breadcrumb={
          isMobile ? (
            <TableOfContentsMenu headings={headings} />
          ) : (
            <PublicBreadcrumb
              documentId={document.id}
              shareId={shareId}
              sharedTree={sharedTree}
            >
              {documentHasHeadings ? toc : null}
            </PublicBreadcrumb>
          )
        }
        actions={
          <>
            {appearanceAction}
            {canEdit ? editAction : <div />}
          </>
        }
      />
    );
  }

  return (
    <>
      <Header
        hasSidebar
        breadcrumb={
          <FadeOut $fade={hideHeader}>
            {isMobile ? (
              <TableOfContentsMenu headings={headings} />
            ) : (
              <DocumentBreadcrumb document={document}>
                {!isEditing && toc}
              </DocumentBreadcrumb>
            )}
          </FadeOut>
        }
        title={
          <>
            {document.title}{" "}
            {document.isArchived && <Badge>{t("Archived")}</Badge>}
          </>
        }
        actions={
          <>
            <ObservingBanner />
            <FadeOut $fade={hideHeader}>
              {!isPublishing && isSaving && !team?.collaborativeEditing && (
                <Status>{t("Saving")}…</Status>
              )}
              {!isDeleted && <Collaborators document={document} />}
              {(isEditing || team?.collaborativeEditing) &&
                !isTemplate &&
                isNew && (
                  <Action>
                    <TemplatesMenu
                      document={document}
                      onSelectTemplate={onSelectTemplate}
                    />
                  </Action>
                )}
              {!isEditing && !isDeleted && (!isMobile || !isTemplate) && (
                <Action>
                  <ShareButton document={document} />
                </Action>
              )}
              {isEditing && (
                <>
                  <Action>
                    <Tooltip
                      tooltip={t("Save")}
                      shortcut={`${metaDisplay}+enter`}
                      delay={500}
                      placement="bottom"
                    >
                      <Button
                        onClick={handleSave}
                        disabled={savingIsDisabled}
                        neutral={isDraft}
                      >
                        {isDraft ? t("Save Draft") : t("Done Editing")}
                      </Button>
                    </Tooltip>
                  </Action>
                </>
              )}
              {canEdit && !team?.collaborativeEditing && editAction}
              {canEdit && can.createChildDocument && !isMobile && (
                <Action>
                  <NewChildDocumentMenu
                    document={document}
                    label={NewChildDocLabel}
                  />
                </Action>
              )}
              {canEdit && isTemplate && !isDraft && !isRevision && (
                <Action>
                  <Button
                    icon={<PlusIcon />}
                    as={Link}
                    to={newDocumentPath(document.collectionId, {
                      templateId: document.id,
                    })}
                    primary
                  >
                    {t("New from template")}
                  </Button>
                </Action>
              )}
              {can.update && isDraft && !isRevision && (
                <Action>
                  <Tooltip
                    tooltip={t("Publish")}
                    shortcut={`${metaDisplay}+shift+p`}
                    delay={500}
                    placement="bottom"
                  >
                    <Button
                      onClick={handlePublish}
                      disabled={publishingIsDisabled}
                    >
                      {isPublishing ? `${t("Publishing")}…` : t("Publish")}
                    </Button>
                  </Tooltip>
                </Action>
              )}
              {!isEditing && (
                <>
                  {!isDeleted && <Separator />}
                  <Action>
                    <DocumentMenu
                      document={document}
                      isRevision={isRevision}
                      label={DocumentMenuLabel}
                      showToggleEmbeds={canToggleEmbeds}
                      showDisplayOptions
                    />
                  </Action>
                </>
              )}
            </FadeOut>
          </>
        }
      />
    </>
  );
}

const Status = styled(Action)`
  padding-left: 0;
  padding-right: 4px;
  color: ${(props) => props.theme.slate};
`;

export default observer(DocumentHeader);