import type { Node } from '../jostraca'
import type { ContentProps } from './Content'

import { cmp, template } from '../jostraca'


/**
 * The props `Line` reads: exactly `Content`'s.
 *
 * An alias rather than a copy, so the two cannot drift apart. The
 * components are one terminator apart -- `Line` appends a newline and
 * renders the same way -- and the Go port says the same thing by taking
 * `ContentProps` in `LineP`.
 */
type LineProps = ContentProps


const Line = cmp<LineProps, string, string>(function Line(props, children) {
  const node: Node = props.ctx$.node
  node.kind = 'content'
  node.indent = props.indent

  let src = null != props.arg ? props.arg :
    null != props.src ? props.src :
      'string' === typeof children ? children : ''

  src += '\n'

  // THE SAME RENDER AS `Content`, and it was not: this passed the model
  // alone, so `props.replace` and `props.extra` were dropped on the
  // floor. A `Line` inside a `List` therefore emitted `{item.n}`
  // verbatim where a `Content` in the same position substituted, and
  // nothing said why -- the two components are a terminator apart and
  // nothing documented a second difference.
  //
  // THE GO PORT WAS ALREADY RIGHT: `LineP` delegates to `ContentP`,
  // which merges `Extra` and forwards `Replace`. So this is the case
  // AGENTS.md names -- the port pre-empting a latent TS bug -- and the
  // fix goes into TypeScript with Go left alone.
  //
  // `raw` is part of that sameness. A line of final bytes is the same
  // claim as a span of them, one terminator apart, and a `Line` that
  // templated under an option that says otherwise would be the second
  // undocumented difference all over again. See Content for what raw
  // does and why it is not the default.
  if (true !== props.raw) {
    const model = {
      ...props.ctx$.model,
      ...(props.extra || {}),
    }

    src = template(src, model, {
      replace: props.replace
    })
  }

  node.content = src
  node.name = props.name
})



export {
  Line
}

export type {
  LineProps
}