import assert from "node:assert/strict"
import { describe, it } from "node:test"
import {
  buildParagraphSpacingStyle,
  DOCS_LINE_HEIGHT_PRESETS,
  lineHeightPresetId,
  parseSpacingPt,
} from "./docs-line-spacing.ts"

describe("docs-line-spacing", () => {
  it("maps preset ids", () => {
    assert.equal(lineHeightPresetId(1.15), "1.15")
    assert.equal(lineHeightPresetId(1.3), "custom")
    assert.equal(lineHeightPresetId(null), null)
  })

  it("parses spacing pt", () => {
    assert.equal(parseSpacingPt("12"), 12)
    assert.equal(parseSpacingPt("-1"), 0)
  })

  it("builds spacing style", () => {
    const style = buildParagraphSpacingStyle({
      lineHeight: DOCS_LINE_HEIGHT_PRESETS[1].value,
      spaceBeforePt: 12,
      spaceAfterPt: 0,
      keepWithNext: true,
      keepLinesTogether: false,
      preventWidowOrphan: true,
      pageBreakBefore: false,
    })
    assert.match(style, /line-height: 1\.15/)
    assert.match(style, /margin-top: 12pt/)
    assert.match(style, /break-after: avoid/)
    assert.match(style, /orphans: 2/)
  })
})