---
// Strength (.strength): a segmented password meter, filled by core/js/src/strength.ts
// from the data attributes this component emits. Renders the meter and, unless
// `showText` is off, the label element the component writes the level into.

interface Props {
  /** number of bars; they fill in proportion to the level */
  segments?: number
  /** data-bs-input: selector of the password field, when it is not a sibling */
  input?: string | undefined
  /** data-bs-min-length: the length the built-in scoring counts as long enough */
  minLength?: number | undefined
  /** data-bs-thresholds: score bounds for weak, fair and good */
  thresholds?: number[] | undefined
  /** data-bs-messages: the label for each level */
  messages?: Record<string, string> | undefined
  /** render the .strength-text label under the meter; its slot content shows while the field is empty */
  showText?: boolean
  /** accessible name of the meter — translate it together with the messages */
  ariaLabel?: string
  class?: string
  /** classes on the label element */
  textClass?: string
  /** remaining attributes (id, data-*, …) are forwarded to the meter */
  [key: string]: unknown
}

const { segments = 4, input, minLength, thresholds, messages, showText = true, ariaLabel = 'Password strength', class: className, textClass, ...rest } = Astro.props

const bars = Array.from({ length: segments }, (_, index) => index)
---

<div class:list={['strength', className]} data-bs-strength data-bs-input={input} data-bs-min-length={minLength} data-bs-thresholds={thresholds ? JSON.stringify(thresholds) : undefined} data-bs-messages={messages ? JSON.stringify(messages) : undefined} aria-label={ariaLabel} {...rest}>
  {bars.map(() => <span class="strength-segment" />)}
</div>
{
  showText && (
    <div class:list={['strength-text', textClass]}>
      <slot />
    </div>
  )
}