import { describe, expect, it } from "bun:test"
import {
	isSafeSourceId,
	parseSourceAnnotatedMarkdown,
	stripSourceMarkup,
} from "./source-annotations"

describe("source annotation parsing", () => {
	it("turns allowed response source spans into internal citation links", () => {
		const parsed = parseSourceAnnotatedMarkdown(
			'Alpha <response source="S1">Beta [x]</response> Gamma',
			new Set(["S1"]),
		)

		expect(parsed.markdown).toBe("Alpha [Beta \\[x\\]](#sm-source:S1) Gamma")
	})

	it("renders repeated allowed citations as separate internal links", () => {
		const parsed = parseSourceAnnotatedMarkdown(
			'<response source="S1">First</response> and <response source="S1">Second</response>',
			new Set(["S1"]),
		)

		expect(parsed.markdown).toBe(
			"[First](#sm-source:S1) and [Second](#sm-source:S1)",
		)
	})

	it("renders unknown or unsafe source ids as plain text", () => {
		expect(
			parseSourceAnnotatedMarkdown(
				'Unknown <response source="missing">plain</response>',
				new Set(["S1"]),
			).markdown,
		).toBe("Unknown plain")

		expect(
			parseSourceAnnotatedMarkdown(
				'Unsafe <response source="bad/id">plain</response>',
				new Set(["bad/id"]),
			).markdown,
		).toBe("Unsafe plain")
	})

	it("keeps unclosed, incomplete, nested, and malformed source markup safe", () => {
		expect(
			parseSourceAnnotatedMarkdown(
				'Lead <response source="S1">unfinished answer',
				new Set(["S1"]),
			).markdown,
		).toBe("Lead unfinished answer")

		expect(
			parseSourceAnnotatedMarkdown("Lead <response", new Set(["S1"])).markdown,
		).toBe("Lead ")

		expect(
			parseSourceAnnotatedMarkdown(
				'Outer <response source="S1">A <response source="S2">B</response> C</response>',
				new Set(["S1", "S2"]),
			).markdown,
		).toBe("Outer A B C")

		expect(
			parseSourceAnnotatedMarkdown(
				"Malformed <response source=S1>plain</response>",
				new Set(["S1"]),
			).markdown,
		).toBe("Malformed plain")
	})

	it("does not mutate inline code or fenced code blocks", () => {
		const input =
			'`<response source="S1">code</response>`\n```\n<response source="S1">fenced</response>\n```'

		expect(parseSourceAnnotatedMarkdown(input, new Set(["S1"])).markdown).toBe(
			input,
		)
	})

	it("strips source markup for copy text", () => {
		expect(
			stripSourceMarkup('Alpha <response source="S1">Beta</response>'),
		).toBe("Alpha Beta")
	})

	it("allows only source ids that are safe in internal fragments", () => {
		expect(isSafeSourceId("S1._:-")).toBe(true)
		expect(isSafeSourceId("bad/id")).toBe(false)
		expect(isSafeSourceId("bad space")).toBe(false)
	})
})