import { useEffect } from 'react';
import { useNavigate, useParams } from 'react-router-dom';

import { useFieldMetadataItem } from '@/object-metadata/hooks/useFieldMetadataItem';
import { useObjectMetadataItemForSettings } from '@/object-metadata/hooks/useObjectMetadataItemForSettings';
import { useRelationMetadata } from '@/object-metadata/hooks/useRelationMetadata';
import { getFieldSlug } from '@/object-metadata/utils/getFieldSlug';
import { SaveAndCancelButtons } from '@/settings/components/SaveAndCancelButtons/SaveAndCancelButtons';
import { SettingsHeaderContainer } from '@/settings/components/SettingsHeaderContainer';
import { SettingsPageContainer } from '@/settings/components/SettingsPageContainer';
import { SettingsObjectFieldFormSection } from '@/settings/data-model/components/SettingsObjectFieldFormSection';
import { SettingsObjectFieldTypeSelectSection } from '@/settings/data-model/components/SettingsObjectFieldTypeSelectSection';
import { useFieldMetadataForm } from '@/settings/data-model/hooks/useFieldMetadataForm';
import { AppPath } from '@/types/AppPath';
import { IconArchive, IconSettings } from '@/ui/display/icon';
import { H2Title } from '@/ui/display/typography/components/H2Title';
import { Button } from '@/ui/input/button/components/Button';
import { SubMenuTopBarContainer } from '@/ui/layout/page/SubMenuTopBarContainer';
import { Section } from '@/ui/layout/section/components/Section';
import { Breadcrumb } from '@/ui/navigation/bread-crumb/components/Breadcrumb';
import { FieldMetadataType } from '~/generated-metadata/graphql';

export const SettingsObjectFieldEdit = () => {
  const navigate = useNavigate();

  const { objectSlug = '', fieldSlug = '' } = useParams();
  const { findActiveObjectMetadataItemBySlug } =
    useObjectMetadataItemForSettings();

  const activeObjectMetadataItem =
    findActiveObjectMetadataItemBySlug(objectSlug);

  const { disableMetadataField, editMetadataField } = useFieldMetadataItem();
  const activeMetadataField = activeObjectMetadataItem?.fields.find(
    (metadataField) =>
      metadataField.isActive && getFieldSlug(metadataField) === fieldSlug,
  );

  const {
    relationFieldMetadataItem,
    relationObjectMetadataItem,
    relationType,
  } = useRelationMetadata({ fieldMetadataItem: activeMetadataField });

  const {
    formValues,
    handleFormChange,
    hasFieldFormChanged,
    hasFormChanged,
    hasRelationFormChanged,
    initForm,
    isInitialized,
    isValid,
    validatedFormValues,
  } = useFieldMetadataForm();

  useEffect(() => {
    if (!activeObjectMetadataItem || !activeMetadataField) {
      navigate(AppPath.NotFound);
      return;
    }

    initForm({
      icon: activeMetadataField.icon ?? undefined,
      label: activeMetadataField.label,
      description: activeMetadataField.description ?? undefined,
      type: activeMetadataField.type,
      relation: {
        field: {
          icon: relationFieldMetadataItem?.icon,
          label: relationFieldMetadataItem?.label,
        },
        objectMetadataId: relationObjectMetadataItem?.id,
        type: relationType,
      },
    });
  }, [
    activeMetadataField,
    activeObjectMetadataItem,
    initForm,
    navigate,
    relationFieldMetadataItem?.icon,
    relationFieldMetadataItem?.label,
    relationObjectMetadataItem?.id,
    relationType,
  ]);

  if (!isInitialized || !activeObjectMetadataItem || !activeMetadataField)
    return null;

  const canSave = isValid && hasFormChanged;

  const handleSave = async () => {
    if (!validatedFormValues) return;

    if (
      validatedFormValues.type === FieldMetadataType.Relation &&
      relationFieldMetadataItem?.id &&
      hasRelationFormChanged
    ) {
      await editMetadataField({
        icon: validatedFormValues.relation.field.icon,
        id: relationFieldMetadataItem.id,
        label: validatedFormValues.relation.field.label,
      });
    }

    if (hasFieldFormChanged) {
      await editMetadataField({
        description: validatedFormValues.description,
        icon: validatedFormValues.icon,
        id: activeMetadataField.id,
        label: validatedFormValues.label,
      });
    }

    navigate(`/settings/objects/${objectSlug}`);
  };

  const handleDisable = async () => {
    await disableMetadataField(activeMetadataField);
    navigate(`/settings/objects/${objectSlug}`);
  };

  return (
    <SubMenuTopBarContainer Icon={IconSettings} title="Settings">
      <SettingsPageContainer>
        <SettingsHeaderContainer>
          <Breadcrumb
            links={[
              { children: 'Objects', href: '/settings/objects' },
              {
                children: activeObjectMetadataItem.labelPlural,
                href: `/settings/objects/${objectSlug}`,
              },
              { children: activeMetadataField.label },
            ]}
          />
          {activeMetadataField.isCustom && (
            <SaveAndCancelButtons
              isSaveDisabled={!canSave}
              onCancel={() => navigate(`/settings/objects/${objectSlug}`)}
              onSave={handleSave}
            />
          )}
        </SettingsHeaderContainer>
        <SettingsObjectFieldFormSection
          disabled={!activeMetadataField.isCustom}
          name={formValues.label}
          description={formValues.description}
          iconKey={formValues.icon}
          onChange={handleFormChange}
        />
        <SettingsObjectFieldTypeSelectSection
          fieldMetadata={{
            icon: formValues.icon,
            label: formValues.label || 'Employees',
            id: activeMetadataField.id,
          }}
          objectMetadataId={activeObjectMetadataItem.id}
          onChange={handleFormChange}
          relationFieldMetadata={relationFieldMetadataItem}
          values={{
            type: formValues.type,
            relation: formValues.relation,
          }}
        />
        <Section>
          <H2Title title="Danger zone" description="Disable this field" />
          <Button
            Icon={IconArchive}
            title="Disable"
            size="small"
            onClick={handleDisable}
          />
        </Section>
      </SettingsPageContainer>
    </SubMenuTopBarContainer>
  );
};