import { fireEvent, render, screen, waitFor, within } from "@testing-library/react";
import { QueryClientProvider } from "@tanstack/react-query";
import { RouterProvider, createMemoryHistory } from "@tanstack/react-router";
import { AuthProvider } from "@/auth/store";
import { createQueryClient } from "@/lib/queryClient";
import { createAppRouter } from "@/routes";

const RESPONSES: Record<string, unknown> = {
	"/api/rules": {
		rules: [
			{
				id: 1,
				group_id: 1,
				group: "Default",
				pattern: "ads.example.com",
				kind: "exact",
				action: "block",
				created_at: 1700000000,
			},
			{
				id: 2,
				group_id: 2,
				group: "Kids",
				pattern: "*.cdn.example.com",
				kind: "wildcard",
				action: "allow",
				created_at: 1700000100,
			},
		],
	},
	"/api/version": { version: "0.0.0-test", git_commit: "0000000", zig_version: "0.16.0", uptime_seconds: 1 },
};

// The API orders groups by name, so the id-1 default is not always first.
let groups: { id: number; name: string; safe_search: boolean }[];
let deleted: string[];
let posted: { pattern: string; kind: string }[];

function deleteCalls(): string[] {
	return deleted;
}

beforeEach(() => {
	groups = [
		{ id: 1, name: "Default", safe_search: false },
		{ id: 2, name: "Kids", safe_search: true },
	];
	deleted = [];
	posted = [];
	vi.stubGlobal(
		"fetch",
		vi.fn(async (input: RequestInfo | URL, init?: RequestInit) => {
			const url = String(input);
			if (init?.method === "DELETE") {
				deleted.push(url);
				return new Response(null, { status: 204 });
			}
			if (url === "/api/rules" && init?.method === "POST") {
				posted.push(JSON.parse(String(init.body)) as { pattern: string; kind: string });
				return new Response(JSON.stringify({ error: "rate limited" }), {
					status: 429,
					headers: { "content-type": "application/json", "Retry-After": "5" },
				});
			}
			const payload = url === "/api/groups" ? { groups } : RESPONSES[url];
			if (payload === undefined) return new Response(JSON.stringify({ error: "not stubbed" }), { status: 404 });
			return new Response(JSON.stringify(payload), {
				status: 200,
				headers: { "content-type": "application/json" },
			});
		}),
	);
});

afterEach(() => {
	vi.unstubAllGlobals();
});

function renderRulesRoute() {
	const queryClient = createQueryClient();
	const router = createAppRouter(createMemoryHistory({ initialEntries: ["/rules"] }), queryClient);
	render(
		<AuthProvider>
			<QueryClientProvider client={queryClient}>
				<RouterProvider router={router} />
			</QueryClientProvider>
		</AuthProvider>,
	);
}

/**
 * A RAC Select names its trigger with the current value and then the label, so
 * the label alone is a suffix match. Opening it is the only way to read the
 * options: there is no `<select>` carrying them any more.
 */
function trigger(label: string): HTMLElement {
	return screen.getByRole("button", { name: new RegExp(`${label}$`) });
}

async function optionsOf(label: string): Promise<(string | null)[]> {
	fireEvent.click(trigger(label));
	const options = await screen.findAllByRole("option");
	const labels = options.map((option) => option.textContent);
	// Re-picking the current value closes the listbox and changes nothing.
	fireEvent.click(options.find((option) => option.getAttribute("aria-selected") === "true") ?? options[0]!);
	await waitFor(() => expect(screen.queryByRole("listbox")).toBeNull());
	return labels;
}

test("renders the rule table and the create form with contract enums", async () => {
	renderRulesRoute();
	await screen.findByRole("heading", { name: "Rules" });

	const table = within(screen.getByRole("table"));
	expect(table.getByText("ads.example.com")).toBeTruthy();
	expect(table.getByText("*.cdn.example.com")).toBeTruthy();
	expect(table.getByText("block")).toBeTruthy();
	expect(table.getByText("allow")).toBeTruthy();
	expect(table.getByText("Kids")).toBeTruthy();
	expect(screen.getAllByRole("button", { name: "Delete" })).toHaveLength(2);

	expect(await optionsOf("Kind")).toEqual(["exact", "wildcard", "regex"]);
	expect(await optionsOf("Action")).toEqual(["allow", "block"]);
	expect(await optionsOf("Group")).toEqual(["Default", "Kids"]);
});

test("the kind selector can select the regex option, not only list it", async () => {
	renderRulesRoute();
	await screen.findByRole("heading", { name: "Rules" });

	fireEvent.click(trigger("Kind"));
	const options = await screen.findAllByRole("option");
	const regex = options.find((option) => option.textContent === "regex");
	expect(regex).toBeTruthy();
	fireEvent.click(regex!);
	await waitFor(() => expect(screen.queryByRole("listbox")).toBeNull());

	expect(trigger("Kind").textContent).toContain("regex");
});

async function selectKind(label: string): Promise<void> {
	fireEvent.click(trigger("Kind"));
	const options = await screen.findAllByRole("option");
	fireEvent.click(options.find((option) => option.textContent === label)!);
	await waitFor(() => expect(screen.queryByRole("listbox")).toBeNull());
}

// A regex is stored and matched byte for byte, so whitespace inside it is data,
// not slop the UI may drop. Exact and wildcard are normalized server-side.
test("a regex pattern is posted untrimmed, an exact pattern is trimmed", async () => {
	renderRulesRoute();
	await screen.findByRole("heading", { name: "Rules" });

	await selectKind("regex");
	fireEvent.change(screen.getByLabelText("Pattern"), { target: { value: " foo|bar " } });
	fireEvent.click(screen.getByRole("button", { name: "Create rule" }));
	await waitFor(() => expect(posted).toHaveLength(1));
	expect(posted[0]).toMatchObject({ pattern: " foo|bar ", kind: "regex" });

	await selectKind("exact");
	fireEvent.change(screen.getByLabelText("Pattern"), { target: { value: "  ads.example.net  " } });
	fireEvent.click(screen.getByRole("button", { name: "Create rule" }));
	await waitFor(() => expect(posted).toHaveLength(2));
	expect(posted[1]).toMatchObject({ pattern: "ads.example.net", kind: "exact" });
});

test("the pattern field opts out of mobile autocapitalize and autocorrect", async () => {
	renderRulesRoute();
	await screen.findByRole("heading", { name: "Rules" });

	const input = screen.getByLabelText("Pattern");
	expect(input.getAttribute("autocapitalize")).toBe("none");
	expect(input.getAttribute("autocorrect")).toBe("off");
	expect(input.getAttribute("spellcheck")).toBe("false");
});

test("rule create shows a countdown when rate limited with Retry-After", async () => {
	renderRulesRoute();
	await screen.findByRole("heading", { name: "Rules" });

	fireEvent.change(screen.getByLabelText("Pattern"), { target: { value: "ads.example.net" } });
	fireEvent.click(screen.getByRole("button", { name: "Create rule" }));

	const alert = await screen.findByRole("alert");
	expect(alert.textContent).toBe("Rate limited. Try again in 5s.");
});

test("the group select preselects the id-1 default, not the alphabetically first group", async () => {
	groups = [
		{ id: 5, name: "Attic", safe_search: false },
		{ id: 1, name: "Default", safe_search: false },
	];
	renderRulesRoute();
	await screen.findByRole("heading", { name: "Rules" });

	expect(await optionsOf("Group")).toEqual(["Attic", "Default"]);
	expect(trigger("Group").textContent).toContain("Default");
});

test("the group select falls back to the first group when the default is absent", async () => {
	groups = [
		{ id: 5, name: "Attic", safe_search: false },
		{ id: 7, name: "Basement", safe_search: false },
	];
	renderRulesRoute();
	await screen.findByRole("heading", { name: "Rules" });

	expect(trigger("Group").textContent).toContain("Attic");
});

test("delete asks for confirmation, and cancelling sends no request", async () => {
	renderRulesRoute();
	await screen.findByRole("heading", { name: "Rules" });

	fireEvent.click(screen.getAllByRole("button", { name: "Delete" })[0]!);
	const dialog = await screen.findByRole("alertdialog");
	expect(dialog.textContent).toContain('Delete the block rule for "ads.example.com"?');

	fireEvent.click(screen.getByRole("button", { name: "Cancel" }));
	await waitFor(() => expect(screen.queryByRole("alertdialog")).toBeNull());
	expect(deleteCalls()).toEqual([]);
});

test("confirming the delete dialog issues the DELETE for that rule", async () => {
	renderRulesRoute();
	await screen.findByRole("heading", { name: "Rules" });

	fireEvent.click(screen.getAllByRole("button", { name: "Delete" })[1]!);
	await screen.findByRole("alertdialog");
	fireEvent.click(screen.getByRole("button", { name: "Delete" }));

	await waitFor(() => expect(deleteCalls()).toEqual(["/api/rules/2"]));
});