import { observer } from "mobx-react";
import { useParams, usePathname } from "next/navigation";
import { useCallback, useEffect } from "react";
// buzzwareTech imports
import { useTranslation } from "@buzzwaretech/i18n";
import type {
    TProjectAppliedDisplayFilterKeys,
    TProjectFilters,
} from "@buzzwaretech/types";
import { calculateTotalFilters } from "@buzzwaretech/utils";
// components
import { PageHead } from "@/components/core/page-title";
// hooks
import { useProject } from "@/hooks/store/use-project";
import { useProjectFilter } from "@/hooks/store/use-project-filter";
import { useWorkspace } from "@/hooks/store/use-workspace";
// local imports
import { ProjectAppliedFiltersList } from "./applied-filters";
import { ProjectCardList } from "./card-list";

export const ProjectRoot = observer(function ProjectRoot() {
  const { currentWorkspace } = useWorkspace();
  const { workspaceSlug } = useParams();
  const pathname = usePathname();
  const { t } = useTranslation();
  // store
  const { totalProjectIds, filteredProjectIds } = useProject();
  const {
    currentWorkspaceFilters,
    currentWorkspaceAppliedDisplayFilters,
    clearAllFilters,
    clearAllAppliedDisplayFilters,
    updateFilters,
    updateDisplayFilters,
  } = useProjectFilter();
  // derived values
  const pageTitle = currentWorkspace?.name
    ? `${currentWorkspace?.name} - ${t("workspace_projects.label", { count: 2 })}`
    : undefined;

  const isArchived = pathname.includes("/archives");

  const allowedDisplayFilters =
    currentWorkspaceAppliedDisplayFilters?.filter(
      (filter) => filter !== "archived_projects",
    ) ?? [];

  const handleRemoveFilter = useCallback(
    (key: keyof TProjectFilters, value: string | null) => {
      if (!workspaceSlug) return;
      let newValues = currentWorkspaceFilters?.[key] ?? [];

      if (!value) newValues = [];
      else newValues = newValues.filter((val) => val !== value);

      updateFilters(workspaceSlug.toString(), { [key]: newValues });
    },
    [currentWorkspaceFilters, updateFilters, workspaceSlug],
  );

  const handleRemoveDisplayFilter = useCallback(
    (key: TProjectAppliedDisplayFilterKeys) => {
      if (!workspaceSlug) return;
      updateDisplayFilters(workspaceSlug.toString(), { [key]: false });
    },
    [updateDisplayFilters, workspaceSlug],
  );

  const handleClearAllFilters = useCallback(() => {
    if (!workspaceSlug) return;
    clearAllFilters(workspaceSlug.toString());
    clearAllAppliedDisplayFilters(workspaceSlug.toString());
    if (isArchived)
      updateDisplayFilters(workspaceSlug.toString(), {
        archived_projects: true,
      });
  }, [clearAllFilters, clearAllAppliedDisplayFilters, workspaceSlug]);

  useEffect(() => {
    updateDisplayFilters(workspaceSlug.toString(), {
      archived_projects: isArchived,
    });
  }, [pathname]);

  return (
    <>
      <PageHead title={pageTitle} />
      <div className="flex h-full w-full flex-col">
        {(calculateTotalFilters(currentWorkspaceFilters ?? {}) !== 0 ||
          allowedDisplayFilters.length > 0) && (
          <ProjectAppliedFiltersList
            appliedFilters={currentWorkspaceFilters ?? {}}
            appliedDisplayFilters={allowedDisplayFilters}
            handleClearAllFilters={handleClearAllFilters}
            handleRemoveFilter={handleRemoveFilter}
            handleRemoveDisplayFilter={handleRemoveDisplayFilter}
            filteredProjects={filteredProjectIds?.length ?? 0}
            totalProjects={totalProjectIds?.length ?? 0}
            alwaysAllowEditing
          />
        )}
        <ProjectCardList />
      </div>
    </>
  );
});