import type { Locator, Page } from "@playwright/test";
import { test, expect, syntheticModel, syntheticUserMessage, type HarnessState, type ApplicationFixture } from "./fixtures";
import type { ChatRecord } from "../src/core/contracts/chat";
import type { GraphNode } from "../src/core/contracts/graph";
import type { DemoResult, JobRecord } from "../src/core/contracts/jobs";
import type { LhMessage } from "../src/core/native-messages";

// Inline, synthetic native records; never copy golden-data's personal content.
const id = "chat_e2e_application";
const title = "Synthetic arithmetic lesson";
const timestamp = 1_800_000_000_000;
function assistant(messageId: string, content: unknown[], stopReason = "stop"): LhMessage {
	return { id: messageId, role: "assistant", provider: "openai", api: "openai-responses", model: syntheticModel.id,
		content, stopReason, timestamp,
		usage: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, totalTokens: 0, cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 } },
	} as LhMessage;
}
function record(messages: LhMessage[]): ChatRecord {
	return { version: 1, id, title, createdAt: new Date(timestamp).toISOString(), updatedAt: new Date(timestamp).toISOString(), messages, turns: [] };
}
function configure(harness: HarnessState, language: "en" | "ru" = "en"): ApplicationFixture {
	const slot = { model: { provider: "openai", id: syntheticModel.id }, thinking: "off" as const };
	harness.keyPresent = true;
	harness.settings = { version: 1, general: { language }, graph: { rendering: false }, models: { strong: slot, cheap: slot, vision: slot } };
	const node: GraphNode = { id: "n_synthetic_sum", name: "Addition", statement: "Two plus two equals four.", aliases: [],
		provenance: [{ chatId: id, messageId: "lesson-opening" }], createdAt: new Date(timestamp).toISOString() };
	const app: ApplicationFixture = { chats: [], jobs: [], inputs: [], reads: [], reply: null, failures: [],
		graph: { nodes: [node], propositions: [node], edges: [], logicalEdges: [], impLinks: [], chains: [],
			sessions: { [id]: title }, fileSources: {}, nodeSessions: { [node.id]: [id] }, clusters: [] } };
	harness.application = app;
	return app;
}
async function openSession(page: Page) {
	const open = page.getByRole("button", { name: "Open sidebar", exact: true });
	if (await open.isVisible()) await open.click();
	await page.getByTestId("session-row").filter({ hasText: title }).click();
	await expect(page).toHaveURL(`/chat/${id}`);
}
async function withinViewport(control: Locator, page: Page) {
	await expect(control).toBeVisible();
	// Sidebar/dock have CSS transitions: assert their settled layout, not a frame mid-animation.
	await expect.poll(async () => {
		const box = await control.boundingBox();
		const viewport = page.viewportSize()!;
		return !!box && box.x >= 0 && box.y >= 0 && box.x + box.width <= viewport.width + 1 && box.y + box.height <= viewport.height + 1;
	}, { message: "Control must fit inside the settled viewport" }).toBe(true);
	const box = await control.boundingBox();
	expect(box).not.toBeNull();
	const viewport = page.viewportSize()!;
	expect(box!.x).toBeGreaterThanOrEqual(0);
	expect(box!.y).toBeGreaterThanOrEqual(0);
	expect(box!.x + box!.width).toBeLessThanOrEqual(viewport.width + 1);
	expect(box!.y + box!.height).toBeLessThanOrEqual(viewport.height + 1);
	// Geometry alone misses occlusion/overflow clipping; hit-test its center too.
	expect(await control.evaluate((el) => {
		const r = el.getBoundingClientRect();
		const hit = document.elementFromPoint(r.x + r.width / 2, r.y + r.height / 2);
		return hit === el || (hit !== null && el.contains(hit));
	})).toBe(true);
}

function demoJob(): JobRecord {
	const result: DemoResult = { title: "Synthetic addition demo", tested: true,
		html: "<!doctype html><html><body><button onclick=\"this.textContent='Four'\">Reveal sum</button></body></html>" };
	return { id: "job_synthetic_demo", kind: "demo", chatId: id, toolCallId: "demo-call", status: "done", activity: "", createdAt: new Date(timestamp).toISOString(), updatedAt: new Date(timestamp).toISOString(), result };
}
// buildSubagentSteer's native marker shape, with synthetic demo failure payloads.
function syntheticSteer(job: JobRecord): LhMessage {
	const result: DemoResult = job.status === "error"
		? { title: "Synthetic failed demo", tested: true, html: "", notes: job.error }
		: job.result as DemoResult;
	const content = job.status === "error"
		? `The demo "${result.title}" could not be built: ${result.notes ?? "unknown reason"}. Fall back to explaining in prose; if the brief was the problem, re-call demo with a tighter one.`
		: `The demo "${result.title}" is built, headlessly tested, and rendered in the lesson. Builder notes: ${result.notes ?? "(none)"}.\nTeach with it — reference its controls by name and point the learner at what to try.`;
	return { id: `steer_${job.id}`, role: "custom", customType: "subagent-steer", display: true, timestamp, content,
		details: { jobId: job.id, kind: job.kind, toolCallId: job.toolCallId, result } };
}

test("entrypoint, learning chains, chat, sandboxed artifact and settings compose without duplicate sends", async ({ page, harness }) => {
	const app = configure(harness);
	const job = demoJob();
	app.jobs.push(job);
	const chat = record([
		{ ...syntheticUserMessage("Teach synthetic addition"), id: "learner-opening" },
		assistant("lesson-opening", [{ type: "text", text: "Synthetic addition lesson: two plus two equals four." },
			{ type: "toolCall", id: job.toolCallId, name: "demo", arguments: { description: "Show addition" } }], "toolUse"),
		{ id: "demo-ack", role: "toolResult", toolCallId: job.toolCallId, toolName: "demo", content: [{ type: "text", text: "Dispatched synthetic demo" }], isError: false, timestamp },
		{ ...syntheticSteer(job), id: "demo-steer" },
	]);
	await harness.seedChat(chat);
	await page.goto("/");
	await page.getByRole("button", { name: "Chains", exact: true }).click();
	await page.getByTestId(`cluster-toggle-${id}`).click();
	await page.getByRole("button", { name: "Expand chain Addition", exact: true }).click();
	await expect(page.getByText("Two plus two equals four.", { exact: true })).toBeVisible();
	await page.getByTestId("chain-table-search").fill("nothing-matches-this-synthetic-query");
	await expect(page.getByTestId("chain-table-nomatch")).toBeVisible();
	await page.getByTestId("chain-table-search").fill("");
	await expect(page.getByTestId(`cluster-group-${id}`)).toBeVisible();
	await page.getByTestId("chain-table-close").click();
	await openSession(page);
	await expect(page.getByText("Synthetic addition lesson: two plus two equals four.", { exact: true })).toHaveCount(1);
	const frame = page.frameLocator('iframe[title="Synthetic addition demo"]');
	await frame.getByRole("button", { name: "Reveal sum" }).click();
	await expect(frame.getByRole("button", { name: "Four" })).toBeVisible();
	await expect(page.locator('iframe[title="Synthetic addition demo"]')).toHaveAttribute("sandbox", "allow-scripts");
	const inverted = page.waitForResponse((response) => response.url().endsWith(`/api/chats/${id}/artifact-ui`) && response.request().method() === "POST");
	await page.getByRole("switch", { name: "Invert demo brightness", exact: true }).click();
	expect((await inverted).ok()).toBe(true);
	await expect.poll(() => harness.writes.filter((w) => w.path.endsWith("/artifact-ui"))).toEqual([
		{ path: `/api/chats/${id}/artifact-ui`, body: { input: { messageId: "demo-steer", inverted: true } } },
	]);
	await page.getByRole("button", { name: "Settings", exact: true }).click();
	await page.getByTestId("settings-nav-general").click();
	await expect(page.getByTestId("language-select-language")).toBeVisible();
	await page.getByTestId("settings-close").click();
	await expect(page).toHaveURL(`/chat/${id}`);
	await expect(frame.getByRole("button", { name: "Four" })).toBeVisible();
	await page.getByRole("link", { name: "Home", exact: true }).click();
	await expect(page).toHaveURL("/");
	await openSession(page);
	await expect(page.getByRole("switch", { name: "Invert demo brightness", exact: true })).toHaveAttribute("aria-checked", "true");
	app.reply = assistant("generated-reply", [{ type: "text", text: "Synthetic streamed explanation received." }]);
	await page.getByRole("textbox", { name: "Ask, answer, or steer the lesson…", exact: true }).fill("Explain the synthetic sum");
	await page.getByRole("textbox", { name: "Ask, answer, or steer the lesson…", exact: true }).press("Enter");
	await expect(page.getByText("Synthetic streamed explanation received.", { exact: true })).toBeVisible();
	await expect.poll(() => app.inputs).toEqual([{ chatId: id, input: { type: "text", text: "Explain the synthetic sum" } }]);
	expect(app.reads.filter((p) => p.endsWith("/stream"))).toEqual([`/api/chats/${id}/stream`]);
	await page.reload();
	await expect(page.getByText("Synthetic streamed explanation received.", { exact: true })).toHaveCount(1);
	expect(app.inputs).toHaveLength(1);
});

for (const width of [1280, 390]) {
	test(`quiz controls remain reachable and submit exactly once at ${width}px`, async ({ page, harness }) => {
		await page.setViewportSize({ width, height: 900 });
		const app = configure(harness);
		const question = { type: "predict", nodeId: "synthetic-addition", question: "Which expression equals four?", options: [
			{ label: "Two plus two", value: "sum" }, { label: "Two minus two", value: "difference" },
		], correctAnswer: "sum", explanation: "Adding two pairs gives four." };
		await harness.seedChat(record([assistant("quiz-message", [{ type: "toolCall", id: "quiz-call", name: "quiz", arguments: question }], "toolUse")]));
		app.reply = assistant("quiz-feedback", [{ type: "text", text: "Synthetic quiz feedback received." }]);
		await page.goto(`/chat/${id}`);
		// Server-rendered controls precede hydration; jobs is a client mount effect.
		await expect.poll(() => app.reads.includes("/api/jobs")).toBe(true);
		const close = page.getByRole("button", { name: "Close sidebar", exact: true });
		if (await close.isVisible()) await close.click();
		await expect(page.getByTestId("question-dock")).toBeVisible();
		await expect(page.getByText(question.question, { exact: true })).toBeVisible();
		const answer = page.getByRole("radio", { name: "Two plus two", exact: true });
		await withinViewport(answer, page);
		await answer.click();
		const submit = page.getByRole("button", { name: "Submit answer", exact: true });
		await withinViewport(submit, page);
		await expect(submit).toBeEnabled();
		const controls = page.getByTestId("question-dock").locator('button, textarea, [role="radio"], [role="slider"]');
		for (const control of await controls.all()) {
			if (await control.isVisible() && await control.isEnabled()) await withinViewport(control, page);
		}
		await submit.click();
		await expect(page.getByText("Synthetic quiz feedback received.", { exact: true })).toBeVisible();
		await expect.poll(() => app.inputs.length).toBe(1);
		expect(app.inputs[0]!.chatId).toBe(id);
		expect(app.inputs[0]!.input).toMatchObject({ type: "answer", toolCallId: "quiz-call", answer: { answers: [{ value: "sum", label: "Two plus two" }], correct: true, confidence: 50 } });
		await expect(page.getByTestId("question-dock")).toHaveCount(0);
		expect(app.reads.filter((p) => p.endsWith("/stream"))).toHaveLength(1);
		await page.reload();
		await expect(page.getByText("Synthetic quiz feedback received.", { exact: true })).toHaveCount(1);
		expect(app.inputs).toHaveLength(1);
	});
}

test("failed response displays Retry and visibly recovers through the real acknowledged stream", async ({ page, harness }) => {
	const app = configure(harness);
	const failed = { ...assistant("failed-response", [], "error"), errorMessage: "Synthetic upstream response failed" } as LhMessage;
	await harness.seedChat(record([syntheticUserMessage("Explain synthetic addition"), failed]));
	app.reply = assistant("retry-success", [{ type: "text", text: "Synthetic retry recovered." }]);
	app.failures.push({ status: 500, body: { error: "Synthetic retry still unavailable" } });
	await page.goto(`/chat/${id}`);
	await expect(page.getByText("Something went wrong: Synthetic upstream response failed", { exact: true })).toBeVisible();
	await page.getByRole("button", { name: "Retry", exact: true }).click();
	// Non-2xx opening acknowledgements surface their raw response text.
	await expect(page.getByText('Something went wrong: {"error":"Synthetic retry still unavailable"}', { exact: true })).toBeVisible();
	await page.getByRole("button", { name: "Retry", exact: true }).click();
	await expect(page.getByText("Synthetic retry recovered.", { exact: true })).toBeVisible();
	await expect(page.getByTestId("retry-failed-turn")).toHaveCount(0);
	await expect(page.getByText(/Something went wrong:/)).toHaveCount(0);
	expect(app.inputs).toEqual([{ chatId: id, input: { type: "retry" } }, { chatId: id, input: { type: "retry" } }]);
	expect(app.reads.filter((p) => p.endsWith("/stream"))).toHaveLength(1);
});

for (const language of ["en", "ru"] as const) {
	test(`settled job ${language} keeps localized completion, error and refusal registers`, async ({ page, harness }) => {
		const app = configure(harness, language);
		const done = demoJob();
		const error: JobRecord = { ...done, id: "job_synthetic_error", toolCallId: "error-call", status: "error", result: undefined, error: "Synthetic demo build failed" };
		const refused: JobRecord = { ...error, id: "job_synthetic_refused", toolCallId: "refused-call", error: "No model configured — set up your models first" };
		app.jobs.push(done, error, refused);
		const messages: LhMessage[] = [assistant("dispatches", [done, error, refused].map((job) => ({ type: "toolCall", id: job.toolCallId, name: "demo", arguments: { description: "Synthetic job" } })), "toolUse")];
		for (const job of app.jobs) messages.push({ id: `${job.id}-ack`, role: "toolResult", toolCallId: job.toolCallId, toolName: "demo", content: [{ type: "text", text: "Dispatched synthetic job" }], isError: false, timestamp });
		for (const job of app.jobs) messages.push(syntheticSteer(job));
		await harness.seedChat(record(messages));
		await page.goto(`/chat/${id}`);
		await expect(page.getByText(language === "ru" ? "завершено" : "finished", { exact: true })).toHaveCount(1);
		// The error and refusal result markers each have a failed artifact card.
		await expect(page.getByTestId("demo-card-failed")).toHaveCount(2);
		await expect(page.getByTestId("demo-card-failed").getByText(language === "ru" ? "ошибка" : "failed", { exact: true })).toHaveCount(2);
		await expect(page.getByRole("button", { name: language === "ru" ? "Настроить модели" : "Set up models", exact: true })).toBeVisible();
		await expect(page.getByText("Synthetic demo build failed", { exact: true })).toBeVisible();
		// Stored builder notes stay verbatim; the dispatch refusal CTA is localized.
		await expect(page.getByText("No model configured — set up your models first", { exact: true })).toBeVisible();
		expect(app.inputs).toEqual([]);
	});
}