import { observer } from "mobx-react";
import { useParams } from "next/navigation";
import useSWR from "swr";
// buzzwareTech constants
import {
    ISSUE_DISPLAY_FILTERS_BY_PAGE,
    PROJECT_VIEW_TRACKER_ELEMENTS,
} from "@buzzwaretech/constants";
import { EIssueLayoutTypes, EIssuesStoreType } from "@buzzwaretech/types";
import { Spinner } from "@buzzwaretech/ui";
// components
import { ProjectLevelWorkItemFiltersHOC } from "@/components/work-item-filters/filters-hoc/project-level";
import { WorkItemFiltersRow } from "@/components/work-item-filters/filters-row";
// hooks
import { useIssues } from "@/hooks/store/use-issues";
import { IssuesStoreContext } from "@/hooks/use-issue-layout-store";
// local imports
import { IssuePeekOverview } from "../../peek-overview";
import { CalendarLayout } from "../calendar/roots/project-root";
import { BaseGanttRoot } from "../gantt";
import { KanBanLayout } from "../kanban/roots/project-root";
import { ListLayout } from "../list/roots/project-root";
import { ProjectSpreadsheetLayout } from "../spreadsheet/roots/project-root";

function ProjectIssueLayout(props: {
  activeLayout: EIssueLayoutTypes | undefined;
}) {
  switch (props.activeLayout) {
    case EIssueLayoutTypes.LIST:
      return <ListLayout />;
    case EIssueLayoutTypes.KANBAN:
      return <KanBanLayout />;
    case EIssueLayoutTypes.CALENDAR:
      return <CalendarLayout />;
    case EIssueLayoutTypes.GANTT:
      return <BaseGanttRoot />;
    case EIssueLayoutTypes.SPREADSHEET:
      return <ProjectSpreadsheetLayout />;
    default:
      return null;
  }
}

export const ProjectLayoutRoot = observer(function ProjectLayoutRoot() {
  // router
  const { workspaceSlug: routerWorkspaceSlug, projectId: routerProjectId } =
    useParams();
  const workspaceSlug = routerWorkspaceSlug
    ? routerWorkspaceSlug.toString()
    : undefined;
  const projectId = routerProjectId ? routerProjectId.toString() : undefined;
  // hooks
  const { issues, issuesFilter } = useIssues(EIssuesStoreType.PROJECT);
  // derived values
  const workItemFilters = projectId
    ? issuesFilter?.getIssueFilters(projectId)
    : undefined;
  const activeLayout = workItemFilters?.displayFilters?.layout;

  useSWR(
    workspaceSlug && projectId
      ? `PROJECT_ISSUES_${workspaceSlug}_${projectId}`
      : null,
    async () => {
      if (workspaceSlug && projectId) {
        await issuesFilter?.fetchFilters(workspaceSlug, projectId);
      }
    },
    { revalidateIfStale: false, revalidateOnFocus: false },
  );

  if (!workspaceSlug || !projectId || !workItemFilters) return <></>;
  return (
    <IssuesStoreContext.Provider value={EIssuesStoreType.PROJECT}>
      <ProjectLevelWorkItemFiltersHOC
        enableSaveView
        entityType={EIssuesStoreType.PROJECT}
        entityId={projectId}
        filtersToShowByLayout={ISSUE_DISPLAY_FILTERS_BY_PAGE.issues.filters}
        initialWorkItemFilters={workItemFilters}
        updateFilters={issuesFilter?.updateFilterExpression.bind(
          issuesFilter,
          workspaceSlug,
          projectId,
        )}
        projectId={projectId}
        workspaceSlug={workspaceSlug}
      >
        {({ filter: projectWorkItemsFilter }) => (
          <div className="relative flex h-full w-full flex-col overflow-hidden">
            {projectWorkItemsFilter && (
              <WorkItemFiltersRow
                filter={projectWorkItemsFilter}
                trackerElements={{
                  saveView:
                    PROJECT_VIEW_TRACKER_ELEMENTS.PROJECT_HEADER_SAVE_AS_VIEW_BUTTON,
                }}
              />
            )}
            <div className="relative h-full w-full overflow-auto bg-surface-1">
              {/* mutation loader */}
              {issues?.getIssueLoader() === "mutation" && (
                <div className="shadow-sm fixed top-[70px] right-[20px] z-50 flex h-[40px] w-[40px] items-center justify-center rounded-sm bg-layer-1">
                  <Spinner className="h-4 w-4" />
                </div>
              )}
              <ProjectIssueLayout activeLayout={activeLayout} />
            </div>
            {/* peek overview */}
            <IssuePeekOverview />
          </div>
        )}
      </ProjectLevelWorkItemFiltersHOC>
    </IssuesStoreContext.Provider>
  );
});