/**
 * Copyright (c) 2023-present Plane Software, Inc. and contributors
 * SPDX-License-Identifier: AGPL-3.0-only
 * See the LICENSE file for details.
 */

import { useEffect, useState } from "react";
import { observer } from "mobx-react";
// plane imports
import { useTranslation } from "@plane/i18n";
import { Button, getButtonStyling } from "@plane/propel/button";
import type { IWorkspace } from "@plane/types";
// assets
import WorkspaceCreationDisabled from "@/app/assets/workspace/workspace-creation-disabled.png?url";
import { AuthHeaderBase } from "@/components/auth-screens/header";
// components
import { CreateWorkspaceForm } from "@/components/workspace/create-workspace-form";
// hooks
import { useUser, useUserProfile } from "@/hooks/store/user";
import { useInstance } from "@/hooks/store/use-instance";
import { useAppRouter } from "@/hooks/use-app-router";
// wrappers
import { AuthenticationWrapper } from "@/lib/wrappers/authentication-wrapper";
import { WorkspaceService, type NodeDCWorkspacePolicy } from "@/services/workspace.service";

const workspaceService = new WorkspaceService();

const CreateWorkspacePage = observer(function CreateWorkspacePage() {
  const { t } = useTranslation();
  // router
  const router = useAppRouter();
  // store hooks
  const { config } = useInstance();
  const { data: currentUser } = useUser();
  const { updateUserProfile } = useUserProfile();
  // states
  const [defaultValues, setDefaultValues] = useState<Pick<IWorkspace, "name" | "slug" | "organization_size">>({
    name: "",
    slug: "",
    organization_size: "",
  });
  const [workspacePolicy, setWorkspacePolicy] = useState<NodeDCWorkspacePolicy | null>(null);
  const [workspacePolicyLoading, setWorkspacePolicyLoading] = useState(true);
  // derived values
  const isWorkspaceCreationDisabled = config?.is_workspace_creation_disabled ?? false;
  const isWorkspaceCreationDeniedByNodeDC = Boolean(workspacePolicy?.enabled && !workspacePolicy.can_create_workspace);
  const shouldBlockWorkspaceCreation = isWorkspaceCreationDisabled || isWorkspaceCreationDeniedByNodeDC;

  useEffect(() => {
    let mounted = true;

    workspaceService
      .getNodeDCWorkspacePolicy()
      .then((policy) => {
        if (mounted) setWorkspacePolicy(policy);
      })
      .catch(() => {
        if (mounted) {
          setWorkspacePolicy({
            enabled: false,
            can_create_workspace: true,
            mode: "unavailable",
            managed_by: "tasker",
            default_managed_by: "tasker",
            workspaces: [],
            reason: "NODE.DC workspace policy is unavailable.",
          });
        }
      })
      .finally(() => {
        if (mounted) setWorkspacePolicyLoading(false);
      });

    return () => {
      mounted = false;
    };
  }, []);

  // methods
  const getMailtoHref = () => {
    const subject = t("workspace_creation.request_email.subject");
    const body = t("workspace_creation.request_email.body", {
      firstName: currentUser?.first_name || "",
      lastName: currentUser?.last_name || "",
      email: currentUser?.email || "",
    });

    return `mailto:?subject=${encodeURIComponent(subject)}&body=${encodeURIComponent(body)}`;
  };

  const onSubmit = async (workspace: IWorkspace) => {
    await updateUserProfile({ last_workspace_id: workspace.id }).then(() => router.push(`/${workspace.slug}`));
  };

  return (
    <AuthenticationWrapper>
      <div className="relative z-10 flex min-h-screen w-screen flex-col overflow-hidden overflow-y-auto bg-canvas px-8 pt-10 pb-12">
        <AuthHeaderBase pageTitle={t("workspace_creation.heading")} />
        <main className="grid flex-1 place-items-center py-8">
          {workspacePolicyLoading ? (
            <section className="nodedc-auth-shell flex flex-col items-start justify-center gap-4">
              <div className="space-y-3">
                <h1 className="m-0 text-30 font-semibold leading-tight text-primary">Работайте во всех измерениях.</h1>
                <p className="m-0 text-28 font-semibold leading-tight text-secondary">Проверяем доступ к workspace.</p>
              </div>
              <p className="m-0 text-14 leading-6 text-secondary">
                Сверяем платформенную policy NODE.DC перед созданием рабочего пространства.
              </p>
            </section>
          ) : shouldBlockWorkspaceCreation ? (
            <section className="nodedc-auth-shell flex flex-col items-center justify-center gap-4 text-center">
              <img
                src={WorkspaceCreationDisabled}
                className="max-h-56 w-full object-contain"
                alt="Workspace creation disabled"
              />
              <h1 className="m-0 text-24 font-semibold text-primary">
                {isWorkspaceCreationDeniedByNodeDC
                  ? "Workspace создаёт администратор."
                  : t("workspace_creation.errors.creation_disabled.title")}
              </h1>
              <p className="m-0 text-14 leading-6 text-secondary">
                {isWorkspaceCreationDeniedByNodeDC
                  ? workspacePolicy?.reason || "Дождитесь назначения в рабочее пространство администратором NODE.DC."
                  : t("workspace_creation.errors.creation_disabled.description")}
              </p>
              <div className="mt-6 flex w-full flex-col gap-3">
                <Button variant="primary" className="nodedc-auth-primary-button" onClick={() => router.back()}>
                  {t("common.go_back")}
                </Button>
                <a href={getMailtoHref()} className={getButtonStyling("secondary", "base") + " nodedc-auth-secondary-button"}>
                  {t("workspace_creation.errors.creation_disabled.request_button")}
                </a>
              </div>
            </section>
          ) : (
            <section className="nodedc-auth-shell nodedc-create-workspace-card space-y-7">
              <div className="space-y-3">
                <h1 className="m-0 text-30 font-semibold leading-tight text-primary">Работайте во всех измерениях.</h1>
                <p className="m-0 text-28 font-semibold leading-tight text-secondary">Создайте рабочее пространство.</p>
              </div>
              <CreateWorkspaceForm
                variant="nodedc-auth"
                onSubmit={onSubmit}
                defaultValues={defaultValues}
                setDefaultValues={setDefaultValues}
              />
            </section>
          )}
        </main>
      </div>
    </AuthenticationWrapper>
  );
});

export default CreateWorkspacePage;