import {Component, Fragment} from 'react';
import styled from '@emotion/styled';
import sortBy from 'lodash/sortBy';

import {Button} from 'sentry/components/button';
import FieldGroup from 'sentry/components/forms/fieldGroup';
import Input from 'sentry/components/input';
import {IconChevron} from 'sentry/icons';
import {t} from 'sentry/locale';
import {space} from 'sentry/styles/space';

import type {EventId, KeysOfUnion, Rule, SourceSuggestion} from '../../types';
import {MethodType, RuleType} from '../../types';
import {getMethodLabel, getRuleLabel} from '../../utils';

import EventIdField from './eventIdField';
import SelectField from './selectField';
import SourceField from './sourceField';

type Values = Omit<Record<KeysOfUnion<Rule>, string>, 'id'>;

type Props<V extends Values, K extends keyof V> = {
  errors: Partial<V>;
  eventId: EventId;
  onChange: (field: K, value: string) => void;
  onUpdateEventId: (eventId: string) => void;
  onValidate: (field: K) => () => void;
  sourceSuggestions: Array<SourceSuggestion>;
  values: V;
};

type State = {
  displayEventId: boolean;
};

class Form extends Component<Props<Values, KeysOfUnion<Values>>, State> {
  state: State = {displayEventId: !!this.props.eventId?.value};

  handleChange =
    <K extends keyof Values>(field: K) =>
    (event: React.ChangeEvent<HTMLInputElement>) => {
      this.props.onChange(field, event.target.value);
    };

  handleToggleEventId = () => {
    this.setState(prevState => ({displayEventId: !prevState.displayEventId}));
  };

  render() {
    const {
      values,
      onChange,
      errors,
      onValidate,
      sourceSuggestions,
      onUpdateEventId,
      eventId,
    } = this.props;
    const {method, type, source} = values;
    const {displayEventId} = this.state;

    return (
      <Fragment>
        <FieldContainer hasTwoColumns={values.method === MethodType.REPLACE}>
          <FieldGroup
            label={t('Method')}
            help={t('What to do')}
            inline={false}
            flexibleControlStateSize
            stacked
            showHelpInTooltip
          >
            <SelectField
              placeholder={t('Select method')}
              name="method"
              options={sortBy(Object.values(MethodType)).map(value => ({
                ...getMethodLabel(value),
                value,
              }))}
              value={method}
              onChange={value => onChange('method', value?.value)}
            />
          </FieldGroup>
          {values.method === MethodType.REPLACE && (
            <FieldGroup
              label={t('Custom Placeholder (Optional)')}
              help={t('It will replace the default placeholder [Filtered]')}
              inline={false}
              flexibleControlStateSize
              stacked
              showHelpInTooltip
            >
              <Input
                type="text"
                name="placeholder"
                placeholder={`[${t('Filtered')}]`}
                onChange={this.handleChange('placeholder')}
                value={values.placeholder}
              />
            </FieldGroup>
          )}
        </FieldContainer>
        <FieldContainer hasTwoColumns={values.type === RuleType.PATTERN}>
          <FieldGroup
            data-test-id="type-field"
            label={t('Data Type')}
            help={t(
              'What to look for. Use an existing pattern or define your own using regular expressions.'
            )}
            inline={false}
            flexibleControlStateSize
            stacked
            showHelpInTooltip
          >
            <SelectField
              placeholder={t('Select type')}
              name="type"
              options={sortBy(Object.values(RuleType)).map(value => ({
                label: getRuleLabel(value),
                value,
              }))}
              value={type}
              onChange={value => onChange('type', value?.value)}
            />
          </FieldGroup>
          {values.type === RuleType.PATTERN && (
            <FieldGroup
              label={t('Regex matches')}
              help={t('Custom regular expression (see documentation)')}
              inline={false}
              id="regex-matches"
              error={errors?.pattern}
              flexibleControlStateSize
              stacked
              required
              showHelpInTooltip
            >
              <RegularExpression
                type="text"
                name="pattern"
                placeholder={t('[a-zA-Z0-9]+')}
                onChange={this.handleChange('pattern')}
                value={values.pattern}
                onBlur={onValidate('pattern')}
                id="regex-matches"
              />
            </FieldGroup>
          )}
        </FieldContainer>
        <ToggleWrapper>
          {displayEventId ? (
            <Toggle priority="link" onClick={this.handleToggleEventId}>
              {t('Hide event ID field')}
              <IconChevron direction="up" size="xs" />
            </Toggle>
          ) : (
            <Toggle priority="link" onClick={this.handleToggleEventId}>
              {t('Use event ID for auto-completion')}
              <IconChevron direction="down" size="xs" />
            </Toggle>
          )}
        </ToggleWrapper>
        <SourceGroup isExpanded={displayEventId}>
          {displayEventId && (
            <EventIdField onUpdateEventId={onUpdateEventId} eventId={eventId} />
          )}
          <SourceField
            onChange={value => onChange('source', value)}
            value={source}
            error={errors?.source}
            onBlur={onValidate('source')}
            isRegExMatchesSelected={type === RuleType.PATTERN}
            suggestions={sourceSuggestions}
          />
        </SourceGroup>
      </Fragment>
    );
  }
}

export default Form;

const FieldContainer = styled('div')<{hasTwoColumns: boolean}>`
  display: grid;
  margin-bottom: ${space(2)};
  @media (min-width: ${p => p.theme.breakpoints.small}) {
    gap: ${space(2)};
    ${p => p.hasTwoColumns && `grid-template-columns: 1fr 1fr;`}
    margin-bottom: ${p => (p.hasTwoColumns ? 0 : space(2))};
  }
`;

const SourceGroup = styled('div')<{isExpanded: boolean}>`
  height: 65px;
  transition: all 300ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;
  transition-property: height;
  ${p =>
    p.isExpanded &&
    `
    border-radius: ${p.theme.borderRadius};
    border: 1px solid ${p.theme.border};
    box-shadow: ${p.theme.dropShadowMedium};
    margin: ${space(2)} 0 ${space(3)} 0;
    padding: ${space(2)};
    height: 180px;
  `}
`;

const RegularExpression = styled(Input)`
  font-family: ${p => p.theme.text.familyMono};
`;

const ToggleWrapper = styled('div')`
  display: flex;
  justify-content: flex-end;
`;

const Toggle = styled(Button)`
  font-weight: 700;
  color: ${p => p.theme.subText};
  &:hover,
  &:focus {
    color: ${p => p.theme.textColor};
  }
  > *:first-child {
    display: grid;
    gap: ${space(0.5)};
    grid-template-columns: repeat(2, max-content);
    align-items: center;
  }
`;