import React, { useState } from "react";

import { useRouter } from "next/router";

import useSWR from "swr";

// services
import { ProjectStateService } from "services/project";
// hooks
import useProjectDetails from "hooks/use-project-details";
import useUserAuth from "hooks/use-user-auth";
// layouts
import { ProjectSettingLayout } from "layouts/setting-layout/project-setting-layout";
// components
import { CreateUpdateStateInline, DeleteStateModal, SingleState, StateGroup } from "components/states";
import { ProjectSettingHeader } from "components/headers";
// ui
import { Loader } from "@plane/ui";
// icons
import { Plus } from "lucide-react";
// helpers
import { getStatesList, orderStateGroups } from "helpers/state.helper";
// types
import type { NextPage } from "next";
// fetch-keys
import { STATES_LIST } from "constants/fetch-keys";

// services
const projectStateService = new ProjectStateService();

const StatesSettings: NextPage = () => {
  const [activeGroup, setActiveGroup] = useState<StateGroup>(null);
  const [selectedState, setSelectedState] = useState<string | null>(null);
  const [selectDeleteState, setSelectDeleteState] = useState<string | null>(null);

  const router = useRouter();
  const { workspaceSlug, projectId } = router.query;

  const { user } = useUserAuth();

  const { projectDetails } = useProjectDetails();

  const { data: states } = useSWR(
    workspaceSlug && projectId ? STATES_LIST(projectId as string) : null,
    workspaceSlug && projectId
      ? () => projectStateService.getStates(workspaceSlug as string, projectId as string)
      : null
  );
  const orderedStateGroups = orderStateGroups(states);
  const statesList = getStatesList(orderedStateGroups);

  return (
    <>
      <DeleteStateModal
        isOpen={!!selectDeleteState}
        data={statesList?.find((s) => s.id === selectDeleteState) ?? null}
        onClose={() => setSelectDeleteState(null)}
        user={user}
      />
      <ProjectSettingLayout header={<ProjectSettingHeader title="States Settings" />}>
        <div className="pr-9 py-8 gap-10 w-full overflow-y-auto">
          <div className="flex items-center py-3.5 border-b border-custom-border-200">
            <h3 className="text-xl font-medium">States</h3>
          </div>
          <div className="space-y-8 py-6">
            {states && projectDetails && orderedStateGroups ? (
              Object.keys(orderedStateGroups).map((key) => {
                if (orderedStateGroups[key].length !== 0)
                  return (
                    <div key={key} className="flex flex-col gap-2">
                      <div className="flex w-full justify-between">
                        <h4 className="text-base font-medium text-custom-text-200 capitalize">{key}</h4>
                        <button
                          type="button"
                          className="flex items-center gap-2 text-custom-primary-100 px-2 hover:text-custom-primary-200 outline-none"
                          onClick={() => setActiveGroup(key as keyof StateGroup)}
                        >
                          <Plus className="h-4 w-4" />
                        </button>
                      </div>
                      <div className="flex flex-col gap-2 rounded">
                        {key === activeGroup && (
                          <CreateUpdateStateInline
                            groupLength={orderedStateGroups[key].length}
                            onClose={() => {
                              setActiveGroup(null);
                              setSelectedState(null);
                            }}
                            data={null}
                            selectedGroup={key as keyof StateGroup}
                            user={user}
                          />
                        )}
                        {orderedStateGroups[key].map((state, index) =>
                          state.id !== selectedState ? (
                            <SingleState
                              key={state.id}
                              index={index}
                              state={state}
                              statesList={statesList ?? []}
                              handleEditState={() => setSelectedState(state.id)}
                              handleDeleteState={() => setSelectDeleteState(state.id)}
                              user={user}
                            />
                          ) : (
                            <div className="border-b border-custom-border-200 last:border-b-0" key={state.id}>
                              <CreateUpdateStateInline
                                onClose={() => {
                                  setActiveGroup(null);
                                  setSelectedState(null);
                                }}
                                groupLength={orderedStateGroups[key].length}
                                data={statesList?.find((state) => state.id === selectedState) ?? null}
                                selectedGroup={key as keyof StateGroup}
                                user={user}
                              />
                            </div>
                          )
                        )}
                      </div>
                    </div>
                  );
              })
            ) : (
              <Loader className="space-y-5 md:w-2/3">
                <Loader.Item height="40px" />
                <Loader.Item height="40px" />
                <Loader.Item height="40px" />
                <Loader.Item height="40px" />
              </Loader>
            )}
          </div>
        </div>
      </ProjectSettingLayout>
    </>
  );
};

export default StatesSettings;