import React, { useEffect, useState } from "react";
import { useRouter } from "next/router";
import { observer } from "mobx-react-lite";
import { mutate } from "swr";
import { Controller, useForm } from "react-hook-form";
import { Disclosure, Transition } from "@headlessui/react";
// mobx store
import { useMobxStore } from "lib/mobx/store-provider";
// services
import { ModuleService } from "services/module.service";
// hooks
import useToast from "hooks/use-toast";
// components
import { LinkModal, LinksList, SidebarProgressStats } from "components/core";
import { DeleteModuleModal, SidebarLeadSelect, SidebarMembersSelect } from "components/modules";
import ProgressChart from "components/core/sidebar/progress-chart";
// ui
import { CustomMenu, Loader, LayersIcon, CustomSelect, ModuleStatusIcon } from "@plane/ui";
// icon
import { AlertCircle, ChevronDown, ChevronRight, Info, LinkIcon, Plus, Trash2 } from "lucide-react";
// helpers
import { renderShortDate, renderShortMonthDate } from "helpers/date-time.helper";
import { copyUrlToClipboard } from "helpers/string.helper";
// types
import { linkDetails, IModule, ModuleLink } from "types";
// fetch-keys
import { MODULE_DETAILS } from "constants/fetch-keys";
// constant
import { MODULE_STATUS } from "constants/module";

const defaultValues: Partial<IModule> = {
  lead: "",
  members: [],
  start_date: null,
  target_date: null,
  status: "backlog",
};

type Props = {
  moduleId: string;
  handleClose: () => void;
};

// services
const moduleService = new ModuleService();

// TODO: refactor this component
export const ModuleDetailsSidebar: React.FC<Props> = observer((props) => {
  const { moduleId, handleClose } = props;

  const [moduleDeleteModal, setModuleDeleteModal] = useState(false);
  const [moduleLinkModal, setModuleLinkModal] = useState(false);
  const [selectedLinkToUpdate, setSelectedLinkToUpdate] = useState<linkDetails | null>(null);

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

  const { module: moduleStore, user: userStore } = useMobxStore();

  const user = userStore.currentUser ?? undefined;
  const userRole = userStore.currentProjectRole;
  const moduleDetails = moduleStore.moduleDetails[moduleId] ?? undefined;

  const { setToastAlert } = useToast();

  const { reset, control } = useForm({
    defaultValues,
  });

  const submitChanges = (data: Partial<IModule>) => {
    if (!workspaceSlug || !projectId || !moduleId) return;

    mutate<IModule>(
      MODULE_DETAILS(moduleId as string),
      (prevData) => ({
        ...(prevData as IModule),
        ...data,
      }),
      false
    );

    moduleService
      .patchModule(workspaceSlug as string, projectId as string, moduleId as string, data, user)
      .then(() => mutate(MODULE_DETAILS(moduleId as string)))
      .catch((e) => console.log(e));
  };

  const handleCreateLink = async (formData: ModuleLink) => {
    if (!workspaceSlug || !projectId || !moduleId) return;

    const payload = { metadata: {}, ...formData };

    await moduleService
      .createModuleLink(workspaceSlug as string, projectId as string, moduleId as string, payload)
      .then(() => mutate(MODULE_DETAILS(moduleId as string)))
      .catch((err) => {
        if (err.status === 400)
          setToastAlert({
            type: "error",
            title: "Error!",
            message: "This URL already exists for this module.",
          });
        else
          setToastAlert({
            type: "error",
            title: "Error!",
            message: "Something went wrong. Please try again.",
          });
      });
  };

  const handleUpdateLink = async (formData: ModuleLink, linkId: string) => {
    if (!workspaceSlug || !projectId || !module) return;

    const payload = { metadata: {}, ...formData };

    const updatedLinks = moduleDetails.link_module.map((l) =>
      l.id === linkId
        ? {
            ...l,
            title: formData.title,
            url: formData.url,
          }
        : l
    );

    mutate<IModule>(
      MODULE_DETAILS(module.id),
      (prevData) => ({ ...(prevData as IModule), link_module: updatedLinks }),
      false
    );

    await moduleService
      .updateModuleLink(workspaceSlug as string, projectId as string, module.id, linkId, payload)
      .then(() => {
        mutate(MODULE_DETAILS(module.id));
      })
      .catch((err) => {
        console.log(err);
      });
  };

  const handleDeleteLink = async (linkId: string) => {
    if (!workspaceSlug || !projectId || !module) return;

    const updatedLinks = moduleDetails.link_module.filter((l) => l.id !== linkId);

    mutate<IModule>(
      MODULE_DETAILS(module.id),
      (prevData) => ({ ...(prevData as IModule), link_module: updatedLinks }),
      false
    );

    await moduleService
      .deleteModuleLink(workspaceSlug as string, projectId as string, module.id, linkId)
      .then(() => {
        mutate(MODULE_DETAILS(module.id));
      })
      .catch((err) => {
        console.log(err);
      });
  };

  const handleCopyText = () => {
    copyUrlToClipboard(`${workspaceSlug}/projects/${projectId}/modules/${module?.id}`)
      .then(() => {
        setToastAlert({
          type: "success",
          title: "Link copied",
          message: "Module link copied to clipboard",
        });
      })
      .catch(() => {
        setToastAlert({
          type: "error",
          title: "Error!",
          message: "Some error occurred",
        });
      });
  };

  useEffect(() => {
    if (moduleDetails)
      reset({
        ...moduleDetails,
      });
  }, [moduleDetails, reset]);

  const isStartValid = new Date(`${moduleDetails?.start_date}`) <= new Date();
  const isEndValid = new Date(`${moduleDetails?.target_date}`) >= new Date(`${moduleDetails?.start_date}`);

  const progressPercentage = moduleDetails
    ? Math.round((moduleDetails.completed_issues / moduleDetails.total_issues) * 100)
    : null;

  const handleEditLink = (link: linkDetails) => {
    console.log("link", link);
    setSelectedLinkToUpdate(link);
    setModuleLinkModal(true);
  };

  if (!moduleDetails) return null;

  const startDate = new Date(moduleDetails.start_date ?? "");
  const endDate = new Date(moduleDetails.target_date ?? "");

  const areYearsEqual = startDate.getFullYear() === endDate.getFullYear();

  const moduleStatus = MODULE_STATUS.find((status) => status.value === moduleDetails.status);

  const issueCount =
    moduleDetails.total_issues === 0
      ? "0 Issue"
      : moduleDetails.total_issues === moduleDetails.completed_issues
      ? moduleDetails.total_issues > 1
        ? `${moduleDetails.total_issues}`
        : `${moduleDetails.total_issues}`
      : `${moduleDetails.completed_issues}/${moduleDetails.total_issues}`;

  return (
    <>
      <LinkModal
        isOpen={moduleLinkModal}
        handleClose={() => {
          setModuleLinkModal(false);
          setSelectedLinkToUpdate(null);
        }}
        data={selectedLinkToUpdate}
        status={selectedLinkToUpdate ? true : false}
        createIssueLink={handleCreateLink}
        updateIssueLink={handleUpdateLink}
      />
      <DeleteModuleModal isOpen={moduleDeleteModal} onClose={() => setModuleDeleteModal(false)} data={moduleDetails} />
      {module ? (
        <>
          <div className="flex items-center justify-between w-full">
            <div>
              <button
                className="flex items-center justify-center h-5 w-5 rounded-full bg-custom-border-300"
                onClick={() => handleClose()}
              >
                <ChevronRight className="h-3 w-3 text-white stroke-2" />
              </button>
            </div>
            <div className="flex items-center gap-3.5">
              <button onClick={handleCopyText}>
                <LinkIcon className="h-3 w-3 text-custom-text-300" />
              </button>
              <CustomMenu width="lg" ellipsis>
                <CustomMenu.MenuItem onClick={() => setModuleDeleteModal(true)}>
                  <span className="flex items-center justify-start gap-2">
                    <Trash2 className="h-4 w-4" />
                    <span>Delete</span>
                  </span>
                </CustomMenu.MenuItem>
              </CustomMenu>
            </div>
          </div>

          <div className="flex flex-col gap-3">
            <h4 className="text-xl font-semibold break-words w-full text-custom-text-100">{moduleDetails.name}</h4>
            <div className="flex items-center gap-5">
              <Controller
                control={control}
                name="status"
                render={({ field: { value } }) => (
                  <CustomSelect
                    customButton={
                      <span
                        className={`flex items-center cursor-default justify-center text-sm h-6 w-20 rounded-sm ${moduleStatus?.textColor} ${moduleStatus?.bgColor}`}
                      >
                        {moduleStatus?.label ?? "Backlog"}
                      </span>
                    }
                    value={value}
                    onChange={(value: any) => {
                      submitChanges({ status: value });
                    }}
                  >
                    {MODULE_STATUS.map((status) => (
                      <CustomSelect.Option key={status.value} value={status.value}>
                        <div className="flex items-center gap-2">
                          <ModuleStatusIcon status={status.value} />
                          {status.label}
                        </div>
                      </CustomSelect.Option>
                    ))}
                  </CustomSelect>
                )}
              />

              <span className="text-sm text-custom-text-300 font-mediu cursor-default">
                {areYearsEqual ? renderShortDate(startDate, "_ _") : renderShortMonthDate(startDate, "_ _")} -{" "}
                {areYearsEqual ? renderShortDate(endDate, "_ _") : renderShortMonthDate(endDate, "_ _")}
              </span>
            </div>
          </div>

          {moduleDetails.description && (
            <span className="whitespace-normal text-sm leading-5 py-2.5 text-custom-text-200 break-words w-full">
              {moduleDetails.description}
            </span>
          )}

          <div className="flex flex-col gap-5 pt-2.5 pb-6">
            <Controller
              control={control}
              name="lead"
              render={({ field: { value } }) => (
                <SidebarLeadSelect
                  value={value}
                  onChange={(val: string) => {
                    submitChanges({ lead: val });
                  }}
                />
              )}
            />
            <Controller
              control={control}
              name="members"
              render={({ field: { value } }) => (
                <SidebarMembersSelect
                  value={value}
                  onChange={(val: string[]) => {
                    submitChanges({ members: val });
                  }}
                />
              )}
            />

            <div className="flex items-center justify-start gap-1">
              <div className="flex w-1/2 items-center justify-start gap-2 text-custom-text-300">
                <LayersIcon className="h-4 w-4" />
                <span className="text-base">Issues</span>
              </div>
              <div className="flex items-center w-1/2">
                <span className="text-sm text-custom-text-300 px-1.5">{issueCount}</span>
              </div>
            </div>
          </div>

          <div className="flex flex-col">
            <div className="flex w-full flex-col items-center justify-start gap-2 border-t border-custom-border-200 py-5 px-1.5">
              <Disclosure>
                {({ open }) => (
                  <div className={`relative  flex  h-full w-full flex-col ${open ? "" : "flex-row"}`}>
                    <Disclosure.Button
                      className="flex w-full items-center justify-between gap-2 p-1.5"
                      disabled={!isStartValid || !isEndValid}
                    >
                      <div className="flex items-center justify-start gap-2 text-sm">
                        <span className="font-medium text-custom-text-200">Progress</span>
                      </div>

                      <div className="flex items-center gap-2.5">
                        {progressPercentage ? (
                          <span className="flex items-center justify-center h-5 w-9 rounded text-xs font-medium text-amber-500 bg-amber-50">
                            {progressPercentage ? `${progressPercentage}%` : ""}
                          </span>
                        ) : (
                          ""
                        )}
                        {isStartValid && isEndValid ? (
                          <ChevronDown className={`h-3 w-3 ${open ? "rotate-180 transform" : ""}`} aria-hidden="true" />
                        ) : (
                          <div className="flex items-center gap-1">
                            <AlertCircle height={14} width={14} className="text-custom-text-200" />
                            <span className="text-xs italic text-custom-text-200">
                              Invalid date. Please enter valid date.
                            </span>
                          </div>
                        )}
                      </div>
                    </Disclosure.Button>
                    <Transition show={open}>
                      <Disclosure.Panel>
                        <div className="flex flex-col gap-3">
                          {isStartValid && isEndValid ? (
                            <div className=" h-full w-full pt-4">
                              <div className="flex  items-start  gap-4 py-2 text-xs">
                                <div className="flex items-center gap-3 text-custom-text-100">
                                  <div className="flex items-center justify-center gap-1">
                                    <span className="h-2.5 w-2.5 rounded-full bg-[#A9BBD0]" />
                                    <span>Ideal</span>
                                  </div>
                                  <div className="flex items-center justify-center gap-1">
                                    <span className="h-2.5 w-2.5 rounded-full bg-[#4C8FFF]" />
                                    <span>Current</span>
                                  </div>
                                </div>
                              </div>
                              <div className="relative h-40 w-80">
                                <ProgressChart
                                  distribution={moduleDetails.distribution.completion_chart}
                                  startDate={moduleDetails.start_date ?? ""}
                                  endDate={moduleDetails.target_date ?? ""}
                                  totalIssues={moduleDetails.total_issues}
                                />
                              </div>
                            </div>
                          ) : (
                            ""
                          )}
                          {moduleDetails.total_issues > 0 && (
                            <div className="h-full w-full pt-5 border-t border-custom-border-200">
                              <SidebarProgressStats
                                distribution={moduleDetails.distribution}
                                groupedIssues={{
                                  backlog: moduleDetails.backlog_issues,
                                  unstarted: moduleDetails.unstarted_issues,
                                  started: moduleDetails.started_issues,
                                  completed: moduleDetails.completed_issues,
                                  cancelled: moduleDetails.cancelled_issues,
                                }}
                                totalIssues={moduleDetails.total_issues}
                                module={moduleDetails}
                                isPeekView={Boolean(peekModule)}
                              />
                            </div>
                          )}
                        </div>
                      </Disclosure.Panel>
                    </Transition>
                  </div>
                )}
              </Disclosure>
            </div>

            <div className="flex w-full flex-col items-center justify-start gap-2 border-t border-custom-border-200 py-5 px-1.5">
              <Disclosure>
                {({ open }) => (
                  <div className={`relative  flex  h-full w-full flex-col ${open ? "" : "flex-row"}`}>
                    <Disclosure.Button
                      className="flex w-full items-center justify-between gap-2 p-1.5"
                      disabled={!isStartValid || !isEndValid}
                    >
                      <div className="flex items-center justify-start gap-2 text-sm">
                        <span className="font-medium text-custom-text-200">Links</span>
                      </div>

                      <div className="flex items-center gap-2.5">
                        <ChevronDown
                          className={`h-3.5 w-3.5 ${open ? "rotate-180 transform" : ""}`}
                          aria-hidden="true"
                        />
                      </div>
                    </Disclosure.Button>
                    <Transition show={open}>
                      <Disclosure.Panel>
                        <div className="flex flex-col w-full mt-2 space-y-3 h-72 overflow-y-auto">
                          {userRole && moduleDetails.link_module && moduleDetails.link_module.length > 0 ? (
                            <>
                              <div className="flex items-center justify-end w-full">
                                <button
                                  className="flex items-center gap-1.5 text-sm font-medium text-custom-primary-100"
                                  onClick={() => setModuleLinkModal(true)}
                                >
                                  <Plus className="h-3 w-3" />
                                  Add link
                                </button>
                              </div>

                              <LinksList
                                links={moduleDetails.link_module}
                                handleEditLink={handleEditLink}
                                handleDeleteLink={handleDeleteLink}
                                userAuth={{
                                  isGuest: userRole === 5,
                                  isViewer: userRole === 10,
                                  isMember: userRole === 15,
                                  isOwner: userRole === 20,
                                }}
                              />
                            </>
                          ) : (
                            <div className="flex items-center justify-between gap-2">
                              <div className="flex items-center gap-2">
                                <Info className="h-3.5 w-3.5 text-custom-text-300 stroke-[1.5]" />
                                <span className="text-xs text-custom-text-300 p-0.5">No links added yet</span>
                              </div>
                              <button
                                className="flex items-center gap-1.5 text-sm font-medium text-custom-primary-100"
                                onClick={() => setModuleLinkModal(true)}
                              >
                                <Plus className="h-3 w-3" />
                                Add link
                              </button>
                            </div>
                          )}
                        </div>
                      </Disclosure.Panel>
                    </Transition>
                  </div>
                )}
              </Disclosure>
            </div>
          </div>
        </>
      ) : (
        <Loader className="px-5">
          <div className="space-y-2">
            <Loader.Item height="15px" width="50%" />
            <Loader.Item height="15px" width="30%" />
          </div>
          <div className="mt-8 space-y-3">
            <Loader.Item height="30px" />
            <Loader.Item height="30px" />
            <Loader.Item height="30px" />
          </div>
        </Loader>
      )}
    </>
  );
});