/**
 * WellbeingSection — SEN, gender split and local-area deprivation.
 * Secondary pages. Server component.
 */

import type { School, SchoolCensus, SchoolResult, SchoolDeprivation } from '@/lib/types';
import { formatPercentage } from '@/lib/utils';
import { MetricTooltip } from '../MetricTooltip';
import { Section, sectionStyles as styles } from './sectionShared';

// Moved with this section from SecondarySchoolDetailView, its only consumer.
function deprivationDesc(decile: number) {
  if (decile <= 3) return `This school is in one of England's most deprived areas (decile ${decile}/10). Many pupils may face additional challenges at home.`;
  if (decile <= 7) return `This school is in an area with average levels of deprivation (decile ${decile}/10).`;
  return `This school is in one of England's less deprived areas (decile ${decile}/10).`;
}

export function WellbeingSection({
  latestResults, census, schoolInfo, deprivation, hasDeprivation,
}: {
  latestResults: SchoolResult | null;
  census: SchoolCensus | null;
  schoolInfo: School;
  deprivation: SchoolDeprivation | null;
  hasDeprivation: boolean;
}) {
  return (
    <section id="wellbeing" className={styles.card}>
      <h2 className={styles.sectionTitle}>Wellbeing &amp; Context</h2>

      {/* SEN */}
      {(latestResults?.sen_support_pct != null || latestResults?.sen_ehcp_pct != null) && (
        <>
          <h3 className={styles.subSectionTitle}>Special Educational Needs (SEN)</h3>
          <div className={styles.heroStatGrid}>
            {latestResults?.sen_support_pct != null && (
              <div className={styles.heroStatCard}>
                <div className={styles.heroStatLabel}>
                  SEN support
                  <MetricTooltip metricKey="sen_support_pct" />
                </div>
                <div className={styles.heroStatValue}>{formatPercentage(latestResults.sen_support_pct)}</div>
                <div className={styles.heroStatHint}>Without an EHCP</div>
              </div>
            )}
            {latestResults?.sen_ehcp_pct != null && (
              <div className={styles.heroStatCard}>
                <div className={styles.heroStatLabel}>
                  Pupils with EHCP
                  <MetricTooltip metricKey="sen_ehcp_pct" />
                </div>
                <div className={styles.heroStatValue}>{formatPercentage(latestResults.sen_ehcp_pct)}</div>
                <div className={styles.heroStatHint}>Education, Health and Care Plan</div>
              </div>
            )}
            {(() => {
              const total = census?.total_pupils ?? schoolInfo.total_pupils ?? latestResults?.total_pupils ?? null;
              if (total == null) return null;
              const female = census?.female_pupils ?? null;
              const male = census?.male_pupils ?? null;
              const isMixed = schoolInfo.gender === 'Mixed' || schoolInfo.gender == null;
              const hasSplit = isMixed && female != null && male != null && female + male > 0;
              const sum = hasSplit ? female! + male! : 0;
              const girlsPct = hasSplit ? Math.round((female! / sum) * 100) : 0;
              const boysPct = hasSplit ? 100 - girlsPct : 0;
              return (
                <div className={styles.heroStatCard}>
                  <div className={styles.heroStatLabel}>Total pupils</div>
                  <div className={styles.heroStatValue}>{total.toLocaleString()}</div>
                  {hasSplit && (
                    <>
                      <div
                        className={styles.genderBar}
                        role="img"
                        aria-label={`Gender split: ${girlsPct}% girls, ${boysPct}% boys`}
                      >
                        <span className={styles.genderBarGirls} style={{ width: `${girlsPct}%` }} />
                        <span className={styles.genderBarBoys} style={{ width: `${boysPct}%` }} />
                      </div>
                      <div className={styles.genderSplitHint}>
                        <span className={styles.genderSplitGirls}>{girlsPct}% girls</span>
                        <span className={styles.genderSplitSep}> · </span>
                        <span className={styles.genderSplitBoys}>{boysPct}% boys</span>
                      </div>
                    </>
                  )}
                  {schoolInfo.capacity != null && !hasSplit && (
                    <div className={styles.heroStatHint}>Capacity: {schoolInfo.capacity}</div>
                  )}
                </div>
              );
            })()}
          </div>
        </>
      )}

      {/* Deprivation */}
      {hasDeprivation && deprivation && (
        <>
          <h3 className={styles.subSectionTitle} style={{ marginTop: '1.25rem' }}>
            Local Area Context
            <MetricTooltip metricKey="idaci_decile" />
          </h3>
          <div className={styles.deprivationDots}>
            {Array.from({ length: 10 }, (_, i) => (
              <div
                key={i}
                className={`${styles.deprivationDot} ${i < deprivation.idaci_decile! ? styles.deprivationDotFilled : ''}`}
                title={`Decile ${i + 1}`}
              />
            ))}
          </div>
          <div className={styles.deprivationScaleLabel}>
            <span>Most deprived</span>
            <span>Least deprived</span>
          </div>
          <p className={styles.deprivationDesc}>{deprivationDesc(deprivation.idaci_decile!)}</p>
        </>
      )}
    </section>
  );
}