import assert from "node:assert/strict"
import test from "node:test"
import { getUnsupportedPdfCharacterMessage } from "../src/utils/pdfCharacterError"

test("reports unsupported characters with the document position and character offset", () => {
    // pdf-lib displays supplementary Unicode characters as a private-use glyph,
    // while the hexadecimal value still contains the original code point.
    const error = new Error('WinAnsi cannot encode "" (0x1f600)')
    const documentData = {
        rows: [
            { pos: "1", text: "Montage" },
            { pos: "2.3", descriptionText: "Gerät 😀 montieren" },
        ],
    }

    assert.equal(
        getUnsupportedPdfCharacterMessage(error, documentData),
        "Das Zeichen „😀“ (Unicode U+1F600) wird in PDF-Dokumenten nicht unterstützt. Fundstelle: Position 2.3, Beschreibung, Zeichen 7. Bitte ersetze oder entferne das Zeichen."
    )
})

test("returns null for unrelated PDF errors", () => {
    assert.equal(
        getUnsupportedPdfCharacterMessage(new Error("Background PDF is invalid"), {}),
        null
    )
})