import { describe, expect, test } from "bun:test";
import type { ExportedGame, LibraryExport } from "@playnite/contract";
import { resolveConfig } from "@playnite/contract";
import {
	computeEntries,
	isGuid,
	launchCommand,
} from "../src/domain/reconcile.js";

const G1 = "11111111-1111-1111-1111-111111111111";
const G2 = "22222222-2222-2222-2222-222222222222";

const game = (over: Partial<ExportedGame>): ExportedGame => ({
	id: G1,
	name: "Game",
	installed: true,
	hidden: false,
	source: "Steam",
	platforms: ["PC (Windows)"],
	cover: null,
	background: null,
	icon: null,
	...over,
});

const exp = (games: ExportedGame[]): LibraryExport => ({
	schema: 1,
	generatedAt: "2026-01-01T00:00:00Z",
	playnite: { version: "10", mode: "Desktop" },
	games,
});

const noArt = () => undefined;

describe("isGuid", () => {
	test("accepts a real Playnite guid", () => {
		expect(isGuid(G1)).toBe(true);
	});
	test("rejects junk", () => {
		expect(isGuid("not-a-guid")).toBe(false);
		expect(isGuid('570" & calc')).toBe(false);
	});
});

describe("launchCommand", () => {
	test("Windows uses start + playnite:// uri", () => {
		expect(launchCommand(G1, "win32")).toEqual({
			kind: "command",
			value: `start "" "playnite://playnite/start/${G1}"`,
		});
	});
	test("non-Windows falls back to xdg-open", () => {
		expect(launchCommand(G1, "linux")?.value).toContain("xdg-open");
	});
});

describe("computeEntries filtering", () => {
	test("installedOnly drops uninstalled games", () => {
		const { entries, report } = computeEntries({
			exp: exp([game({ id: G1 }), game({ id: G2, installed: false })]),
			config: resolveConfig({}),
			platform: "win32",
			artFor: noArt,
		});
		expect(entries.map((e) => e.external_id)).toEqual([G1]);
		expect(report.skipped[0]?.reason).toBe("not installed");
	});

	test("includeHidden lets hidden games through", () => {
		const hidden = exp([game({ id: G1, hidden: true })]);
		expect(
			computeEntries({
				exp: hidden,
				config: resolveConfig({}),
				platform: "win32",
				artFor: noArt,
			}).entries.length,
		).toBe(0);
		expect(
			computeEntries({
				exp: hidden,
				config: resolveConfig({ filter: { includeHidden: true } }),
				platform: "win32",
				artFor: noArt,
			}).entries.length,
		).toBe(1);
	});

	test("source include/exclude is case-insensitive", () => {
		const games = exp([
			game({ id: G1, source: "Steam" }),
			game({ id: G2, source: "GOG" }),
		]);
		const only = computeEntries({
			exp: games,
			config: resolveConfig({ filter: { sources: ["steam"] } }),
			platform: "win32",
			artFor: noArt,
		});
		expect(only.entries.map((e) => e.external_id)).toEqual([G1]);

		const without = computeEntries({
			exp: games,
			config: resolveConfig({ filter: { excludeSources: ["GOG"] } }),
			platform: "win32",
			artFor: noArt,
		});
		expect(without.entries.map((e) => e.external_id)).toEqual([G1]);
	});

	test("invalid ids and empty titles are skipped", () => {
		const { entries, report } = computeEntries({
			exp: exp([game({ id: "bogus" }), game({ id: G2, name: "  " })]),
			config: resolveConfig({}),
			platform: "win32",
			artFor: noArt,
		});
		expect(entries.length).toBe(0);
		expect(report.skipped.map((s) => s.reason).sort()).toEqual([
			"invalid game id",
			"no title",
		]);
	});

	test("entries are title-sorted and per-source counted", () => {
		const { entries, report } = computeEntries({
			exp: exp([
				game({ id: G1, name: "Zelda", source: "Nintendo" }),
				game({ id: G2, name: "Antichamber", source: "Steam" }),
			]),
			config: resolveConfig({}),
			platform: "win32",
			artFor: noArt,
		});
		expect(entries.map((e) => e.title)).toEqual(["Antichamber", "Zelda"]);
		expect(report.perSource).toEqual({ Nintendo: 1, Steam: 1 });
	});

	test("artFor result is attached", () => {
		const { entries } = computeEntries({
			exp: exp([game({ id: G1 })]),
			config: resolveConfig({}),
			platform: "win32",
			artFor: () => ({ portrait: "data:image/png;base64,AAAA" }),
		});
		expect(entries[0]?.art?.portrait).toBe("data:image/png;base64,AAAA");
	});

	test("the report carries the export's stamp", () => {
		const { report } = computeEntries({
			exp: exp([game({ id: G1 })]),
			config: resolveConfig({}),
			platform: "win32",
			artFor: noArt,
		});
		expect(report.generatedAt).toBe("2026-01-01T00:00:00Z");
		expect(report.schemaVersion).toBe(1);
		expect(report.considered).toBe(1);
	});
});

describe("per-game overrides", () => {
	test("an excluded game lands in `excluded`, not `skipped`", () => {
		const { entries, report } = computeEntries({
			exp: exp([
				game({ id: G1, name: "Kept" }),
				game({ id: G2, name: "Dropped" }),
			]),
			config: resolveConfig({ gameOverrides: { [G2]: { exclude: true } } }),
			platform: "win32",
			artFor: noArt,
		});
		expect(entries.map((e) => e.title)).toEqual(["Kept"]);
		expect(report.excluded).toEqual([{ id: G2, title: "Dropped" }]);
		expect(report.skipped).toEqual([]);
	});

	test("`exclude: false` is a no-op (the UI omits the key instead)", () => {
		const { entries } = computeEntries({
			exp: exp([game({ id: G1 })]),
			config: resolveConfig({ gameOverrides: { [G1]: { exclude: false } } }),
			platform: "win32",
			artFor: noArt,
		});
		expect(entries.length).toBe(1);
	});

	test("a game already filtered out is not double-reported as excluded", () => {
		const { report } = computeEntries({
			exp: exp([game({ id: G1, installed: false })]),
			config: resolveConfig({ gameOverrides: { [G1]: { exclude: true } } }),
			platform: "win32",
			artFor: noArt,
		});
		expect(report.excluded).toEqual([]);
		expect(report.skipped[0]?.reason).toBe("not installed");
	});
});

describe("dataurl guard rail", () => {
	test("warns once the inlined-cover payload would be too large", () => {
		const many = Array.from({ length: 3001 }, (_, i) =>
			game({
				id: `${i.toString(16).padStart(8, "0")}-1111-1111-1111-111111111111`,
				name: `Game ${i}`,
			}),
		);
		const { report } = computeEntries({
			exp: exp(many),
			config: resolveConfig({ art: { mode: "dataurl" } }),
			platform: "win32",
			artFor: noArt,
		});
		expect(report.warnings[0]).toContain('art.mode "dataurl"');
	});

	test("host mode never warns", () => {
		const { report } = computeEntries({
			exp: exp([game({ id: G1 })]),
			config: resolveConfig({ art: { mode: "host" } }),
			platform: "win32",
			artFor: noArt,
		});
		expect(report.warnings).toEqual([]);
	});
});