import { expect, test } from "bun:test"
import { buildSnapshot } from "../../testing/build-snapshot"
import { overusedFont } from "./overused-font"

const nodes = (font: string, count: number, text = "Feature line set in the primary face") =>
	Array.from({ length: count }, () => ({ tag: "p", text, style: { "font-family": font } }))

test("#given a dominant overused font and normalized spellings #then one page finding reports", () => {
	const snapshot = buildSnapshot([...nodes("GeistSans", 12), ...nodes('"Geist Sans"', 11), ...nodes("Georgia", 1)])
	expect(overusedFont.check({ snapshot, config: {} })).toHaveLength(1)
	expect(overusedFont.check({ snapshot, config: { allowFonts: ["gEiSt SaNs"] } })).toEqual([])
})

test("#given ties, small pages, secondary faces and platform stacks #then only the dominant face qualifies", () => {
	for (const snapshot of [
		buildSnapshot(nodes("Inter", 19)),
		buildSnapshot([...nodes("Inter", 10), ...nodes("Georgia", 10)]),
		buildSnapshot([...nodes("Georgia", 18), ...nodes("Inter", 2)]),
		buildSnapshot(nodes("-apple-system, BlinkMacSystemFont, Roboto, sans-serif", 22)),
	]) expect(overusedFont.check({ snapshot, config: {} })).toEqual([])
	expect(overusedFont.check({ snapshot: buildSnapshot(nodes("Inter", 20)), config: {} })).toHaveLength(1)
})

test("#given label fonts with negligible character share #then only substantial visible usage reports", () => {
	const tiny = buildSnapshot([...nodes("Inter", 30, "1"), ...nodes("Georgia", 8, "Long ordinary body copy ".repeat(10))])
	const substantial = buildSnapshot([...nodes("Inter", 30, "Platform"), ...nodes("Georgia", 8, "Long ordinary body copy ".repeat(10))])
	expect(overusedFont.check({ snapshot: tiny, config: {} })).toEqual([])
	expect(overusedFont.check({ snapshot: substantial, config: {} })).toHaveLength(1)
})

test("#given a brand face on its owner's domain #then only the owning domain is exempt", () => {
	const snapshot = buildSnapshot(nodes("Geist", 20))
	expect(overusedFont.check({ snapshot: { ...snapshot, url: "https://vercel.com" }, config: {} })).toEqual([])
	expect(overusedFont.check({ snapshot: { ...snapshot, url: "https://notvercel.com" }, config: {} })).toHaveLength(1)
})