import { describe, expect, test } from "bun:test";
import {
	quotePosix,
	quoteWindows,
	renderCommand,
} from "../src/domain/quote.js";

describe("quotePosix", () => {
	test("wraps a plain path in single quotes", () => {
		const r = quotePosix("/roms/snes/Chrono Trigger (USA).sfc");
		expect(r).toEqual({
			ok: true,
			value: "'/roms/snes/Chrono Trigger (USA).sfc'",
		});
	});

	test("escapes embedded single quotes", () => {
		const r = quotePosix("it's a rom.sfc");
		expect(r.ok && r.value).toBe("'it'\\''s a rom.sfc'");
	});

	test("neutralises shell metacharacters (no expansion possible)", () => {
		for (const evil of [
			"$(rm -rf ~).sfc",
			"`id`.sfc",
			"; rm x.sfc",
			"a && b.sfc",
			"$HOME.sfc",
		]) {
			const r = quotePosix(evil);
			expect(r.ok).toBe(true);
			// Everything stays inside a single-quoted literal.
			if (r.ok)
				expect(r.value.startsWith("'") && r.value.endsWith("'")).toBe(true);
		}
	});

	test("rejects a NUL byte", () => {
		expect(quotePosix("a\0b").ok).toBe(false);
	});
});

describe("quoteWindows", () => {
	test("double-quotes a normal path", () => {
		const r = quoteWindows("C:\\Games\\Chrono Trigger (USA).sfc");
		expect(r).toEqual({
			ok: true,
			value: '"C:\\Games\\Chrono Trigger (USA).sfc"',
		});
	});

	test("refuses each cmd.exe metacharacter", () => {
		for (const bad of [
			'a"b',
			"a%b",
			"a!b",
			"a^b",
			"a&b",
			"a|b",
			"a<b",
			"a>b",
		]) {
			expect(quoteWindows(bad).ok).toBe(false);
		}
	});

	test("refuses control characters", () => {
		expect(quoteWindows("a\nb").ok).toBe(false);
		expect(quoteWindows("a\tb").ok).toBe(false);
	});

	test("doubles a trailing backslash run so the closing quote is not escaped", () => {
		const r = quoteWindows("C:\\dir\\");
		expect(r.ok && r.value).toBe('"C:\\dir\\\\"');
	});
});

describe("renderCommand", () => {
	test("POSIX: quotes rom + core, inserts exe verbatim", () => {
		const r = renderCommand(
			"{exe} -f -L {core} {rom}",
			{
				exe: "flatpak run org.libretro.RetroArch",
				rom: "/roms/Chrono Trigger (USA).sfc",
				core: "/cores/snes9x_libretro.so",
			},
			"linux",
		);
		expect(r).toEqual({
			ok: true,
			command:
				"flatpak run org.libretro.RetroArch -f -L '/cores/snes9x_libretro.so' '/roms/Chrono Trigger (USA).sfc'",
		});
	});

	test("Windows: a hostile ROM name fails the whole render", () => {
		const r = renderCommand(
			"{exe} {rom}",
			{ exe: '"C:\\ra.exe"', rom: "C:\\roms\\a&b.sfc" },
			"windows",
		);
		expect(r.ok).toBe(false);
	});

	test("appends trusted extra args verbatim", () => {
		const r = renderCommand(
			"{exe} {rom}",
			{ exe: "mgba", rom: "/x.gba" },
			"linux",
			"--scale 4",
		);
		expect(r.ok && r.command).toBe("mgba '/x.gba' --scale 4");
	});

	test("errors on an unfilled placeholder", () => {
		const r = renderCommand(
			"{exe} -L {core} {rom}",
			{ exe: "ra", rom: "/x.sfc" },
			"linux",
		);
		expect(r.ok).toBe(false);
	});
});