import React from 'react';
import { observer } from 'mobx-react-lite';
import { useStore } from 'App/mstore';
import { Toggler, Loader, Button, NoContent, ItemMenu } from 'UI';
import Breadcrumb from 'Shared/Breadcrumb';
import { useHistory } from 'react-router';
import { withSiteId, fflag, fflags } from 'App/routes';
import Multivariant from "Components/FFlags/NewFFlag/Multivariant";
import { toast } from 'react-toastify';
import RolloutCondition from "Shared/ConditionSet";

function FlagView({ siteId, fflagId }: { siteId: string; fflagId: string }) {
  const { featureFlagsStore } = useStore();
  const history = useHistory();

  React.useEffect(() => {
    if (fflagId) {
      void featureFlagsStore.fetchFlag(parseInt(fflagId, 10));
    }
  }, [fflagId]);

  const current = featureFlagsStore.currentFflag;
  if (featureFlagsStore.isLoading) return <Loader loading={true} />;
  if (!current) return <NoContent title={'No flag found'} />;

  const deleteHandler = () => {
    featureFlagsStore.deleteFlag(current.featureFlagId).then(() => {
      toast.success('Feature flag deleted.');
      history.push(withSiteId(fflags(), siteId));
    });
  };

  const menuItems = [{ icon: 'trash', text: 'Delete', onClick: deleteHandler }];

  const toggleActivity = () => {
    const newValue = !current.isActive;
    current.setIsEnabled(newValue);
    featureFlagsStore
      .updateFlagStatus(current.featureFlagId, newValue)
      .then(() => {
        toast.success('Feature flag status has been updated.');
      })
      .catch(() => {
        current.setIsEnabled(!newValue);
        toast.error('Something went wrong, please try again.');
      });
  };

  return (
    <div className={'w-full mx-auto mb-4'} style={{ maxWidth: '1360px' }}>
      <Breadcrumb
        items={[
          { label: 'Feature Flags', to: withSiteId(fflags(), siteId) },
          { label: current.flagKey },
        ]}
      />

      <div className={'w-full bg-white rounded p-4 widget-wrapper'}>
        <div className={'flex items-center gap-2'}>
          <div className={'text-2xl'}>{current.flagKey}</div>
          <Button
            className={'ml-auto'}
            variant={'text-primary'}
            onClick={() =>
              history.push(
                withSiteId(fflag(featureFlagsStore.currentFflag?.featureFlagId.toString()), siteId)
              )
            }
          >
            Edit
          </Button>
          <ItemMenu bold items={menuItems} />
        </div>
        <div className={'border-b'} style={{ color: 'rgba(0,0,0, 0.6)' }}>
          {current.description || 'There is no description for this feature flag.'}
        </div>

        <div className={'mt-4'}>
          <label className={'font-semibold'}>Status</label>
          <Toggler
            checked={current.isActive}
            name={'persist-flag'}
            onChange={toggleActivity}
            label={current.isActive ? 'Enabled' : 'Disabled'}
          />
        </div>
        <div className={'mt-4'}>
          <label className={'font-semibold'}>Persistence</label>
          <div>
            {current.isPersist
              ? 'This flag maintains its state through successive authentication events.'
              : 'This flag is not persistent across authentication events.'}
          </div>
        </div>
        {!current.isSingleOption ? (
          <Multivariant readonly />
        ) : null}
      {current.conditions.length > 0 ? (
        <div className="mt-6 p-4 rounded bg-gray-lightest">
          <label className={'font-semibold'}>Rollout Conditions</label>
          {current.conditions.map((condition, index) => (
            <React.Fragment key={index}>
              <RolloutCondition
                set={index + 1}
                readonly
                index={index}
                conditions={condition}
                removeCondition={current.removeCondition}
              />
              <div className={'mt-2'} />
            </React.Fragment>
          ))}
        </div>
      ) : null}
      </div>

    </div>
  );
}

export default observer(FlagView);