import React, { useState } from "react";
import {
  Divider,
  FormGroup,
  Radio,
  Select,
  SelectOption,
  SelectVariant,
  Switch,
} from "@patternfly/react-core";
import { useTranslation } from "react-i18next";
import { HelpItem } from "../../../components/help-enabler/HelpItem";
import { Controller, useFormContext, useWatch } from "react-hook-form";
import { FormAccess } from "../../../components/form-access/FormAccess";
import { KeycloakTextInput } from "../../../components/keycloak-text-input/KeycloakTextInput";
import { useAdminClient, useFetch } from "../../../context/auth/AdminClient";
import type ClientScopeRepresentation from "@keycloak/keycloak-admin-client/lib/defs/clientScopeRepresentation";
import type UserProfileConfig from "@keycloak/keycloak-admin-client/lib/defs/userProfileConfig";
import type { AttributeParams } from "../../routes/Attribute";
import { useParams } from "react-router-dom";
import { isEqual } from "lodash-es";

import "../../realm-settings-section.css";

const REQUIRED_FOR = [
  { label: "requiredForLabel.both", value: ["admin", "user"] },
  { label: "requiredForLabel.users", value: ["user"] },
  { label: "requiredForLabel.admins", value: ["admin"] },
] as const;

export const AttributeGeneralSettings = () => {
  const { t } = useTranslation("realm-settings");
  const { adminClient } = useAdminClient();
  const form = useFormContext();
  const [clientScopes, setClientScopes] =
    useState<ClientScopeRepresentation[]>();
  const [config, setConfig] = useState<UserProfileConfig>();
  const [selectEnabledWhenOpen, setSelectEnabledWhenOpen] = useState(false);
  const [selectRequiredForOpen, setSelectRequiredForOpen] = useState(false);
  const [isAttributeGroupDropdownOpen, setIsAttributeGroupDropdownOpen] =
    useState(false);
  const { attributeName } = useParams<AttributeParams>();
  const editMode = attributeName ? true : false;

  const selectedScopes = useWatch({
    control: form.control,
    name: "selector.scopes",
    defaultValue: [],
  });

  const requiredScopes = useWatch({
    control: form.control,
    name: "required.scopes",
    defaultValue: [],
  });

  const required = useWatch({
    control: form.control,
    name: "isRequired",
    defaultValue: false,
  });

  useFetch(() => adminClient.clientScopes.find(), setClientScopes, []);
  useFetch(() => adminClient.users.getProfile(), setConfig, []);

  return (
    <FormAccess role="manage-realm" isHorizontal>
      <FormGroup
        label={t("attributeName")}
        labelIcon={
          <HelpItem
            helpText="realm-settings-help:attributeNameHelp"
            fieldLabelId="realm-settings:attributeName"
          />
        }
        fieldId="kc-attribute-name"
        isRequired
        validated={form.errors.name ? "error" : "default"}
        helperTextInvalid={form.errors.name?.message}
      >
        <KeycloakTextInput
          isRequired
          type="text"
          id="kc-attribute-name"
          name="name"
          defaultValue=""
          ref={form.register({
            required: {
              value: true,
              message: t("validateName"),
            },
          })}
          data-testid="attribute-name"
          isDisabled={editMode}
          validated={form.errors.name ? "error" : "default"}
        />
      </FormGroup>
      <FormGroup
        label={t("attributeDisplayName")}
        labelIcon={
          <HelpItem
            helpText="realm-settings-help:attributeDisplayNameHelp"
            fieldLabelId="realm-settings:attributeDisplayName"
          />
        }
        fieldId="kc-attribute-display-name"
      >
        <KeycloakTextInput
          type="text"
          id="kc-attribute-display-name"
          name="displayName"
          defaultValue=""
          ref={form.register}
          data-testid="attribute-display-name"
        />
      </FormGroup>
      <FormGroup
        label={t("attributeGroup")}
        labelIcon={
          <HelpItem
            helpText="realm-setting-help:attributeGroupHelp"
            fieldLabelId="realm-setting:attributeGroup"
          />
        }
        fieldId="kc-attribute-group"
      >
        <Controller
          name="group"
          defaultValue=""
          control={form.control}
          render={({ onChange, value }) => (
            <Select
              toggleId="kc-attributeGroup"
              onToggle={() =>
                setIsAttributeGroupDropdownOpen(!isAttributeGroupDropdownOpen)
              }
              isOpen={isAttributeGroupDropdownOpen}
              onSelect={(_, value) => {
                onChange(value.toString());
                setIsAttributeGroupDropdownOpen(false);
              }}
              selections={[value || t("common:choose")]}
              variant={SelectVariant.single}
            >
              {config?.groups?.map((group) => (
                <SelectOption key={group.name} value={group.name}>
                  {group.name}
                </SelectOption>
              ))}
            </Select>
          )}
        ></Controller>
      </FormGroup>
      <Divider />
      <FormGroup label={t("enabledWhen")} fieldId="enabledWhen" hasNoPaddingTop>
        <Radio
          id="always"
          data-testid="always"
          isChecked={selectedScopes.length === clientScopes?.length}
          name="enabledWhen"
          label={t("always")}
          onChange={(value) => {
            if (value) {
              form.setValue(
                "selector.scopes",
                clientScopes?.map((s) => s.name)
              );
            } else {
              form.setValue("selector.scopes", []);
            }
          }}
          className="pf-u-mb-md"
        />
        <Radio
          id="scopesAsRequested"
          data-testid="scopesAsRequested"
          isChecked={selectedScopes.length !== clientScopes?.length}
          name="enabledWhen"
          label={t("scopesAsRequested")}
          onChange={(value) => {
            if (value) {
              form.setValue("selector.scopes", []);
            } else {
              form.setValue(
                "selector.scopes",
                clientScopes?.map((s) => s.name)
              );
            }
          }}
          className="pf-u-mb-md"
        />
      </FormGroup>
      <FormGroup fieldId="kc-scope-enabled-when">
        <Controller
          name="selector.scopes"
          control={form.control}
          defaultValue={[]}
          render={({ onChange, value }) => (
            <Select
              name="scopes"
              data-testid="enabled-when-scope-field"
              variant={SelectVariant.typeaheadMulti}
              typeAheadAriaLabel="Select"
              chipGroupProps={{
                numChips: 3,
                expandedText: t("common:hide"),
                collapsedText: t("common:showRemaining"),
              }}
              onToggle={(isOpen) => setSelectEnabledWhenOpen(isOpen)}
              selections={value}
              onSelect={(_, selectedValue) => {
                const option = selectedValue.toString();
                let changedValue = [""];
                if (value) {
                  changedValue = value.includes(option)
                    ? value.filter((item: string) => item !== option)
                    : [...value, option];
                } else {
                  changedValue = [option];
                }

                onChange(changedValue);
              }}
              onClear={(selectedValues) => {
                selectedValues.stopPropagation();
                onChange([]);
              }}
              isOpen={selectEnabledWhenOpen}
              isDisabled={selectedScopes.length === clientScopes?.length}
              aria-labelledby={"scope"}
            >
              {clientScopes?.map((option) => (
                <SelectOption key={option.name} value={option.name} />
              ))}
            </Select>
          )}
        />
      </FormGroup>
      <Divider />
      <FormGroup
        label={t("required")}
        labelIcon={
          <HelpItem
            helpText="realm-settings-help:requiredHelp"
            fieldLabelId="realm-settings:required"
          />
        }
        fieldId="kc-required"
        hasNoPaddingTop
      >
        <Controller
          name="isRequired"
          data-testid="required"
          defaultValue={false}
          control={form.control}
          render={({ onChange, value }) => (
            <Switch
              id={"kc-required"}
              onChange={onChange}
              isChecked={value}
              label={t("common:on")}
              labelOff={t("common:off")}
            />
          )}
        />
      </FormGroup>
      {required && (
        <>
          <FormGroup
            label={t("requiredFor")}
            fieldId="requiredFor"
            hasNoPaddingTop
          >
            <Controller
              name="required.roles"
              data-testid="requiredFor"
              defaultValue={REQUIRED_FOR[0].value}
              control={form.control}
              render={({ onChange, value }) => (
                <div className="kc-requiredFor">
                  {REQUIRED_FOR.map((option) => (
                    <Radio
                      id={option.label}
                      key={option.label}
                      data-testid={option.label}
                      isChecked={isEqual(value, option.value)}
                      name="roles"
                      onChange={() => {
                        onChange(option.value);
                      }}
                      label={t(option.label)}
                      className="kc-requiredFor-option"
                    />
                  ))}
                </div>
              )}
            />
          </FormGroup>
          <FormGroup
            label={t("requiredWhen")}
            fieldId="requiredWhen"
            hasNoPaddingTop
          >
            <Radio
              id="requiredAlways"
              data-testid="requiredAlways"
              isChecked={requiredScopes.length === clientScopes?.length}
              name="requiredWhen"
              label={t("always")}
              onChange={(value) => {
                if (value) {
                  form.setValue(
                    "required.scopes",
                    clientScopes?.map((s) => s.name)
                  );
                } else {
                  form.setValue("required.scopes", []);
                }
              }}
              className="pf-u-mb-md"
            />
            <Radio
              id="requiredScopesAsRequested"
              data-testid="requiredScopesAsRequested"
              isChecked={requiredScopes.length !== clientScopes?.length}
              name="requiredWhen"
              label={t("scopesAsRequested")}
              onChange={(value) => {
                if (value) {
                  form.setValue("required.scopes", []);
                } else {
                  form.setValue(
                    "required.scopes",
                    clientScopes?.map((s) => s.name)
                  );
                }
              }}
              className="pf-u-mb-md"
            />
          </FormGroup>
          <FormGroup fieldId="kc-scope-required-when">
            <Controller
              name="required.scopes"
              control={form.control}
              defaultValue={[]}
              render={({ onChange, value }) => (
                <Select
                  name="scopeRequired"
                  data-testid="required-when-scope-field"
                  variant={SelectVariant.typeaheadMulti}
                  typeAheadAriaLabel="Select"
                  chipGroupProps={{
                    numChips: 3,
                    expandedText: t("common:hide"),
                    collapsedText: t("common:showRemaining"),
                  }}
                  onToggle={(isOpen) => setSelectRequiredForOpen(isOpen)}
                  selections={value}
                  onSelect={(_, selectedValue) => {
                    const option = selectedValue.toString();
                    let changedValue = [""];
                    if (value) {
                      changedValue = value.includes(option)
                        ? value.filter((item: string) => item !== option)
                        : [...value, option];
                    } else {
                      changedValue = [option];
                    }
                    onChange(changedValue);
                  }}
                  onClear={(selectedValues) => {
                    selectedValues.stopPropagation();
                    onChange([]);
                  }}
                  isOpen={selectRequiredForOpen}
                  isDisabled={requiredScopes.length === clientScopes?.length}
                  aria-labelledby={"scope"}
                >
                  {clientScopes?.map((option) => (
                    <SelectOption key={option.name} value={option.name} />
                  ))}
                </Select>
              )}
            />
          </FormGroup>
        </>
      )}
    </FormAccess>
  );
};