import { fireEvent, screen, waitFor, within } from "@testing-library/react";
import { DATABASE, contentArea, renderPage, stubApi, type Call } from "./testFixtures";

/**
 * Resolution in database mode: the upstream pool, the local records and the
 * forward zones, each rehomed from its own page onto a tab of one.
 */

let calls: Call[];

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

function writes(): Call[] {
	return calls;
}

async function openResolution(tab?: string, options: Parameters<typeof stubApi>[1] = {}) {
	calls = stubApi(DATABASE, options);
	const suffix = tab === undefined ? "" : `?tab=${tab}`;
	return renderPage(`/configuration/resolution${suffix}`, "Resolution");
}

/** The row Delete opens the dialog; the dialog's own Delete is the confirm. */
async function openDeleteDialog(index = 0) {
	fireEvent.click(screen.getAllByRole("button", { name: "Delete" })[index]!);
	return await screen.findByRole("alertdialog");
}

test("the upstream pool is the default tab and lists every field", async () => {
	await openResolution();

	expect(await screen.findByText("udp://1.1.1.1:53")).toBeTruthy();
	expect(screen.getByText("tls://9.9.9.9:853")).toBeTruthy();
	expect(screen.getByText("dns.quad9.net")).toBeTruthy();
	expect((screen.getByLabelText("udp://1.1.1.1:53 enabled") as HTMLInputElement).checked).toBe(true);
	expect((screen.getByLabelText("tls://9.9.9.9:853 enabled") as HTMLInputElement).checked).toBe(false);
	expect(screen.getByRole("heading", { name: "Add upstream" })).toBeTruthy();
	expect(screen.getByText(/applies to the next query/)).toBeTruthy();
});

test("adding an upstream posts every field", async () => {
	await openResolution();
	await screen.findByRole("heading", { name: "Add upstream" });

	fireEvent.change(screen.getByLabelText("URL"), { target: { value: "udp://8.8.8.8:53" } });
	fireEvent.change(screen.getByLabelText("Priority"), { target: { value: "150" } });
	fireEvent.click(screen.getByRole("button", { name: "Add upstream" }));

	await waitFor(() => expect(writes()).toHaveLength(1));
	expect(writes()[0]).toEqual({
		url: "/api/upstreams",
		method: "POST",
		body: { url: "udp://8.8.8.8:53", priority: 150, enabled: true, tls_name: "" },
	});
});

test("an upstream write applies live, so the tab says nothing about a restart", async () => {
	// The server rebuilds the pool on the write and echoes `restart_required:
	// false`, so `restart_pending` stays down and silence is the whole report.
	await openResolution(undefined, { responses: { "GET /api/config/status": () => DATABASE } });
	await screen.findByRole("heading", { name: "Add upstream" });

	fireEvent.change(screen.getByLabelText("URL"), { target: { value: "udp://8.8.8.8:53" } });
	fireEvent.click(screen.getByRole("button", { name: "Add upstream" }));

	await waitFor(() => expect(writes()).toHaveLength(1));
	expect(screen.queryByText(/Restart nxdns to apply them/)).toBeNull();
	expect(contentArea().textContent).not.toMatch(/restart/i);
});

test("toggling enabled resends the whole row", async () => {
	await openResolution();
	await screen.findByLabelText("tls://9.9.9.9:853 enabled");

	fireEvent.click(screen.getByLabelText("tls://9.9.9.9:853 enabled"));

	await waitFor(() => expect(writes()).toHaveLength(1));
	expect(writes()[0]).toEqual({
		url: "/api/upstreams/2",
		method: "PUT",
		body: { url: "tls://9.9.9.9:853", priority: 200, enabled: true, tls_name: "dns.quad9.net" },
	});
});

test("upstream delete asks for confirmation and skips the request when cancelled", async () => {
	await openResolution();
	await screen.findByText("udp://1.1.1.1:53");

	const dialog = await openDeleteDialog();
	expect(dialog.textContent).toContain('Delete upstream "udp://1.1.1.1:53"?');

	fireEvent.click(within(dialog).getByRole("button", { name: "Cancel" }));
	await waitFor(() => expect(screen.queryByRole("alertdialog")).toBeNull());
	expect(writes()).toHaveLength(0);
});

test("confirming the upstream delete dialog issues the DELETE", async () => {
	await openResolution();
	await screen.findByText("udp://1.1.1.1:53");

	const dialog = await openDeleteDialog();
	fireEvent.click(within(dialog).getByRole("button", { name: "Delete" }));

	await waitFor(() => expect(writes()).toHaveLength(1));
	expect(writes()[0]).toMatchObject({ method: "DELETE", url: "/api/upstreams/1" });
});

test("a 409 on create renders the conflict text inline", async () => {
	await openResolution(undefined, {
		onWrite: () =>
			new Response(JSON.stringify({ error: "an upstream with that url already exists" }), {
				status: 409,
				headers: { "content-type": "application/json" },
			}),
	});
	await screen.findByRole("heading", { name: "Add upstream" });

	fireEvent.change(screen.getByLabelText("URL"), { target: { value: "udp://1.1.1.1:53" } });
	fireEvent.click(screen.getByRole("button", { name: "Add upstream" }));

	const alert = await screen.findByRole("alert");
	expect(alert.textContent).toBe("an upstream with that url already exists");
});

test("a 409 on toggle renders the last-enabled conflict", async () => {
	await openResolution(undefined, {
		onWrite: () =>
			new Response(JSON.stringify({ error: "the last enabled upstream cannot be disabled" }), {
				status: 409,
				headers: { "content-type": "application/json" },
			}),
	});
	await screen.findByLabelText("udp://1.1.1.1:53 enabled");

	fireEvent.click(screen.getByLabelText("udp://1.1.1.1:53 enabled"));

	const alert = await screen.findByRole("alert");
	expect(alert.textContent).toBe("the last enabled upstream cannot be disabled");
});

test("a 409 on delete renders the last-enabled conflict", async () => {
	await openResolution(undefined, {
		onWrite: () =>
			new Response(JSON.stringify({ error: "the last enabled upstream cannot be removed" }), {
				status: 409,
				headers: { "content-type": "application/json" },
			}),
	});
	await screen.findByText("udp://1.1.1.1:53");

	const dialog = await openDeleteDialog();
	fireEvent.click(within(dialog).getByRole("button", { name: "Delete" }));

	const alert = await screen.findByRole("alert");
	expect(alert.textContent).toBe("the last enabled upstream cannot be removed");
});

test("editing a row seeds the form and PUTs the replaced row", async () => {
	await openResolution();
	await screen.findByText("tls://9.9.9.9:853");

	fireEvent.click(screen.getAllByRole("button", { name: "Edit" })[1]!);
	await screen.findByRole("heading", { name: "Edit tls://9.9.9.9:853" });

	expect((screen.getByLabelText("URL") as HTMLInputElement).value).toBe("tls://9.9.9.9:853");
	expect((screen.getByLabelText("Priority") as HTMLInputElement).value).toBe("200");
	expect((screen.getByLabelText("TLS name") as HTMLInputElement).value).toBe("dns.quad9.net");

	fireEvent.change(screen.getByLabelText("Priority"), { target: { value: "10" } });
	fireEvent.click(screen.getByRole("button", { name: "Save changes" }));

	await waitFor(() => expect(writes()).toHaveLength(1));
	expect(writes()[0]).toEqual({
		url: "/api/upstreams/2",
		method: "PUT",
		body: { url: "tls://9.9.9.9:853", priority: 10, enabled: false, tls_name: "dns.quad9.net" },
	});
	await screen.findByRole("heading", { name: "Add upstream" });
});

test("the arrow keys move between tabs, and the panel follows", async () => {
	await openResolution();
	await screen.findByText("udp://1.1.1.1:53");

	const tablist = screen.getByRole("tablist", { name: "Resolution" });
	expect(screen.getByRole("tab", { name: "Upstreams" }).getAttribute("aria-selected")).toBe("true");

	fireEvent.keyDown(tablist, { key: "ArrowRight" });
	await waitFor(() =>
		expect(screen.getByRole("tab", { name: "Records" }).getAttribute("aria-selected")).toBe("true"),
	);
	await screen.findByText("nas.lan.home");

	fireEvent.keyDown(tablist, { key: "ArrowLeft" });
	await waitFor(() =>
		expect(screen.getByRole("tab", { name: "Upstreams" }).getAttribute("aria-selected")).toBe("true"),
	);
	await screen.findByText("udp://1.1.1.1:53");
});

test("creating a local record posts exactly the LocalRecordInput", async () => {
	await openResolution("records");
	await screen.findByText("nas.lan.home");

	fireEvent.click(screen.getByRole("button", { name: "Add record" }));
	fireEvent.change(screen.getByLabelText("Name"), { target: { value: "printer.lan.home" } });
	// The record type is a RAC Select: open the listbox, then pick.
	fireEvent.click(screen.getByRole("button", { name: /Type$/ }));
	fireEvent.click(await screen.findByRole("option", { name: "AAAA" }));
	fireEvent.change(screen.getByLabelText("Value"), { target: { value: "fd00::11" } });
	fireEvent.click(screen.getByRole("button", { name: "Save" }));

	await waitFor(() => expect(writes()).toHaveLength(1));
	expect(writes()[0]).toMatchObject({
		url: "/api/local-records",
		method: "POST",
		body: { name: "printer.lan.home", rtype: "AAAA", value: "fd00::11" },
	});
});

test("the record delete dialog names the record and only deletes on confirm", async () => {
	await openResolution("records");
	await screen.findByText("nas.lan.home");

	let dialog = await openDeleteDialog();
	expect(dialog.textContent).toContain('Delete record "nas.lan.home"?');
	fireEvent.click(within(dialog).getByRole("button", { name: "Cancel" }));
	await waitFor(() => expect(screen.queryByRole("alertdialog")).toBeNull());
	expect(writes()).toHaveLength(0);

	dialog = await openDeleteDialog();
	fireEvent.click(within(dialog).getByRole("button", { name: "Delete" }));
	await waitFor(() => expect(writes()).toHaveLength(1));
	expect(writes()[0]).toMatchObject({ method: "DELETE", url: "/api/local-records/1" });
});

test("the forward zone delete dialog names the zone and only deletes on confirm", async () => {
	await openResolution("zones");
	await screen.findByText("lan.home");

	let dialog = await openDeleteDialog();
	expect(dialog.textContent).toContain('Delete forward zone "lan.home"?');
	fireEvent.click(within(dialog).getByRole("button", { name: "Cancel" }));
	await waitFor(() => expect(screen.queryByRole("alertdialog")).toBeNull());
	expect(writes()).toHaveLength(0);

	dialog = await openDeleteDialog();
	fireEvent.click(within(dialog).getByRole("button", { name: "Delete" }));
	await waitFor(() => expect(writes()).toHaveLength(1));
	expect(writes()[0]).toMatchObject({ method: "DELETE", url: "/api/forward-zones/1" });
});