import { useState, type FormEvent } from 'react'
import type { ReauthCredentials } from './api/client'

type ReauthModalProps = {
  title: string
  hint?: string
  requireTotp: boolean
  confirmLabel?: string
  onCancel: () => void
  onConfirm: (credentials: ReauthCredentials) => Promise<void>
}

export function ReauthModal({
  title,
  hint,
  requireTotp,
  confirmLabel = 'Confirm',
  onCancel,
  onConfirm,
}: ReauthModalProps) {
  const [password, setPassword] = useState('')
  const [totpCode, setTotpCode] = useState('')
  const [error, setError] = useState<string | null>(null)
  const [isSubmitting, setIsSubmitting] = useState(false)

  async function handleSubmit(event: FormEvent) {
    event.preventDefault()
    setError(null)
    setIsSubmitting(true)
    try {
      await onConfirm({
        current_password: password,
        totp_code: totpCode,
      })
    } catch (err) {
      setError(err instanceof Error ? err.message : 'Re-authentication failed')
      setIsSubmitting(false)
    }
  }

  return (
    <div className="reauth-backdrop" role="presentation">
      <div
        className="reauth-modal"
        role="dialog"
        aria-modal="true"
        aria-labelledby="reauth-title"
      >
        <h2 id="reauth-title">{title}</h2>
        {hint ? <p className="config-hint">{hint}</p> : null}
        <form className="reauth-form" onSubmit={(event) => void handleSubmit(event)}>
          <label htmlFor="reauth-password">Password</label>
          <input
            id="reauth-password"
            type="password"
            autoComplete="current-password"
            value={password}
            onChange={(event) => setPassword(event.target.value)}
            required
          />
          {requireTotp ? (
            <>
              <label htmlFor="reauth-totp">Authenticator code</label>
              <input
                id="reauth-totp"
                type="text"
                inputMode="numeric"
                autoComplete="one-time-code"
                value={totpCode}
                onChange={(event) => setTotpCode(event.target.value)}
                required
              />
            </>
          ) : null}
          {error ? (
            <p className="groups-error" role="alert">
              {error}
            </p>
          ) : null}
          <div className="reauth-actions">
            <button type="button" className="config-action-revert" onClick={onCancel}>
              Cancel
            </button>
            <button
              type="submit"
              className="config-action-save"
              disabled={isSubmitting || !password}
            >
              {isSubmitting ? 'Checking…' : confirmLabel}
            </button>
          </div>
        </form>
      </div>
    </div>
  )
}