import { useState } from 'react'
import { de } from '../strings/de'
import type { BreedingResult } from '../genetics'
import FarbschlagImage from './FarbschlagImage'

function warningText(code: string): string {
  const map = de.genetics.warnings as Record<string, string>
  return map[code] ?? code
}

export interface BreedingResultViewProps {
  result: BreedingResult
  /** Heading shown above the Farbschlag cards. Defaults to "Mögliche Nachkommen". */
  title?: string
}

/**
 * Renders a GEN-1 breeding result: warnings (SCHECKE_LETHAL prominent),
 * offspring grouped byFarbschlag (percent + exact fraction), and a collapsible
 * per-genotype table. Shared by the Genetik page (FEAT-5) and the Wurf
 * workspace (FEAT-3) where it shows the expected distribution for a pairing.
 */
export default function BreedingResultView({ result, title }: BreedingResultViewProps) {
  const t = de.pages.genetik
  const [showGenotypes, setShowGenotypes] = useState(false)

  return (
    <div className="results">
      {result.warnings.length > 0 && (
        <div className="warnings">
          <h4>{t.warningsTitle}</h4>
          {result.warnings.map((w) => (
            <div key={w.code} className="alert alert--warning">
              <span>{warningText(w.code)}</span>
            </div>
          ))}
        </div>
      )}

      <h4>{title ?? t.resultsTitle}</h4>
      {result.byFarbschlag.length === 0 ? (
        <p className="muted">{t.noOffspring}</p>
      ) : (
        <>
          <ul className="farbschlag-cards">
            {result.byFarbschlag.map((f) => {
              // Representative genotype: highest-prob offspring for this farbschlag.
              const repGenotype = result.offspring.find(
                (o) => o.farbschlag === f.farbschlag,
              )?.genotype
              return (
                <li key={f.farbschlag} className="farbschlag-card">
                  <div className="farbschlag-card__img">
                    <FarbschlagImage name={f.farbschlag} />
                  </div>
                  <div className="farbschlag-card__body">
                    <span className="farbschlag-card__name">{f.farbschlag}</span>
                    {repGenotype && (
                      <code className="farbschlag-card__geno">{repGenotype}</code>
                    )}
                  </div>
                  <span className="farbschlag-card__prob">
                    {f.probability.percent}
                    <small> ({f.probability.text})</small>
                  </span>
                </li>
              )
            })}
          </ul>

          <button
            type="button"
            className="link-btn"
            onClick={() => setShowGenotypes((s) => !s)}
            aria-expanded={showGenotypes}
          >
            {showGenotypes ? t.hideGenotypes : t.showGenotypes}
          </button>

          {showGenotypes && (
            <div className="genotype-table-scroll">
              <table className="genotype-table">
                <thead>
                  <tr>
                    <th>{t.genotypeLabel}</th>
                    <th>{t.genotypePreview}</th>
                    <th>{t.probability}</th>
                  </tr>
                </thead>
                <tbody>
                  {result.offspring.map((o) => (
                    <tr key={o.genotype}>
                      <td>
                        <code>{o.genotype}</code>
                      </td>
                      <td>{o.farbschlag}</td>
                      <td>
                        {o.probability.percent} <small>({o.probability.text})</small>
                      </td>
                    </tr>
                  ))}
                </tbody>
              </table>
            </div>
          )}
        </>
      )}
    </div>
  )
}