import { afterEach, describe, expect, it, vi } from "bun:test";
import type { TSchema } from "@sinclair/typebox";
import {
	buildRequest,
	parseGeminiCliCredentials,
	shouldRefreshGeminiCliCredentials,
	streamGoogleGeminiCli,
} from "../src/providers/google-gemini-cli";
import type { Context, Model } from "../src/types";
import { getOAuthApiKey } from "../src/utils/oauth";

function createModel(provider: "google-gemini-cli" | "google-antigravity"): Model<"google-gemini-cli"> {
	return {
		id: provider === "google-antigravity" ? "gemini-3-flash" : "gemini-2.5-flash",
		name: provider,
		api: "google-gemini-cli",
		provider,
		baseUrl: "https://example.com",
		reasoning: false,
		input: ["text"],
		cost: {
			input: 0,
			output: 0,
			cacheRead: 0,
			cacheWrite: 0,
		},
		contextWindow: 200000,
		maxTokens: 8192,
	};
}

function createContext(): Context {
	return {
		messages: [{ role: "user", content: "implement token refresh", timestamp: Date.now() }],
	};
}

describe("Google Gemini CLI alignment", () => {
	it("encodes enriched OAuth JSON while preserving token + projectId", async () => {
		const expiresAt = Date.now() + 60 * 60 * 1000;
		const result = await getOAuthApiKey("google-gemini-cli", {
			"google-gemini-cli": {
				access: "access-token",
				refresh: "refresh-token",
				expires: expiresAt,
				projectId: "proj-123",
				email: "dev@example.com",
				accountId: "acct-1",
			},
		});

		expect(result).not.toBeNull();
		const payload = JSON.parse(result!.apiKey) as {
			token?: string;
			projectId?: string;
			refreshToken?: string;
			expiresAt?: number;
			email?: string;
			accountId?: string;
		};
		expect(payload.token).toBe("access-token");
		expect(payload.projectId).toBe("proj-123");
		expect(payload.refreshToken).toBe("refresh-token");
		expect(payload.expiresAt).toBe(expiresAt);
		expect(payload.email).toBe("dev@example.com");
		expect(payload.accountId).toBe("acct-1");
	});

	it("accepts legacy, alias, and enriched OAuth JSON payloads", () => {
		const legacy = parseGeminiCliCredentials(JSON.stringify({ token: "legacy-token", projectId: "proj-legacy" }));
		expect(legacy).toEqual({
			accessToken: "legacy-token",
			projectId: "proj-legacy",
			refreshToken: undefined,
			expiresAt: undefined,
		});

		const aliasPayload = parseGeminiCliCredentials(
			JSON.stringify({
				token: "alias-token",
				project_id: "proj-alias",
				refresh: "refresh-alias",
				expires: 1_737_000_000,
			}),
		);
		expect(aliasPayload).toEqual({
			accessToken: "alias-token",
			projectId: "proj-alias",
			refreshToken: "refresh-alias",
			expiresAt: 1_737_000_000_000,
		});

		const enriched = parseGeminiCliCredentials(
			JSON.stringify({
				token: "enriched-token",
				projectId: "proj-enriched",
				refreshToken: "refresh-token",
				expiresAt: 1_737_000_000_000,
			}),
		);
		expect(enriched).toEqual({
			accessToken: "enriched-token",
			projectId: "proj-enriched",
			refreshToken: "refresh-token",
			expiresAt: 1_737_000_000_000,
		});
	});

	it("avoids excessive antigravity refresh churn with pre-buffered OAuth expiry", () => {
		const issuedAt = 1_700_000_000_000;
		const preBufferedExpiry = issuedAt + 55 * 60 * 1000;

		expect(shouldRefreshGeminiCliCredentials(preBufferedExpiry, true, issuedAt + 10 * 60 * 1000)).toBe(false);
		expect(shouldRefreshGeminiCliCredentials(preBufferedExpiry, true, issuedAt + 54 * 60 * 1000)).toBe(true);
		expect(shouldRefreshGeminiCliCredentials(preBufferedExpiry, false, issuedAt + 54 * 60 * 1000)).toBe(true);
	});
	it("omits antigravity-only metadata in non-antigravity request payloads", () => {
		const model = createModel("google-gemini-cli");
		const payload = buildRequest(model, createContext(), "proj-123", {}, false) as {
			request: { sessionId?: string };
			requestType?: string;
			userAgent?: string;
			requestId?: string;
		};

		expect(payload.request.sessionId).toBeUndefined();
		expect(payload.requestType).toBeUndefined();
		expect(payload.userAgent).toBeUndefined();
		expect(payload.requestId).toBeUndefined();
	});

	it("keeps antigravity metadata in antigravity request payloads", () => {
		const model = createModel("google-antigravity");
		const payload = buildRequest(model, createContext(), "proj-123", {}, true) as {
			request: { sessionId?: string };
			requestType?: string;
			userAgent?: string;
			requestId?: string;
		};

		expect(payload.request.sessionId).toMatch(/^-[0-9]+$/);
		expect(payload.requestType).toBe("agent");
		expect(payload.userAgent).toBe("antigravity");
		expect(payload.requestId).toMatch(/^agent-/);
	});

	it("strips patternProperties when antigravity rewrites tools to legacy parameters", () => {
		const model = createModel("google-antigravity");
		const toolContext: Context = {
			messages: [{ role: "user", content: "rewrite files", timestamp: Date.now() }],
			tools: [
				{
					name: "rewrite_rules",
					description: "Map rewrite regex to replacement",
					parameters: {
						type: "object",
						properties: {
							rules: {
								type: "object",
								patternProperties: {
									"^(.*)$": { type: "string" },
								},
							},
						},
						required: ["rules"],
					} as unknown as TSchema,
				},
			],
		};
		const payload = buildRequest(model, toolContext, "proj-123", {}, true) as {
			request: { tools?: Array<{ functionDeclarations: Array<{ parameters?: unknown }> }> };
		};

		const parameters = payload.request.tools?.[0]?.functionDeclarations[0]?.parameters;
		expect(parameters).toBeDefined();
		expect(JSON.stringify(parameters)).not.toContain('"patternProperties"');
	});
	describe("retry guardrails", () => {
		const originalFetch = globalThis.fetch;

		afterEach(() => {
			vi.restoreAllMocks();
			globalThis.fetch = originalFetch;
		});

		it("does not treat explicit HTTP failures as network retry errors", async () => {
			let fetchCalls = 0;
			globalThis.fetch = vi.fn(async () => {
				fetchCalls += 1;
				return new Response('{"error":{"message":"busy"}}', {
					status: 503,
					headers: { "retry-after": "120" },
				});
			}) as unknown as typeof fetch;

			const model = createModel("google-gemini-cli");
			const stream = streamGoogleGeminiCli(model, createContext(), {
				apiKey: JSON.stringify({ token: "token", projectId: "proj-123" }),
				maxRetryDelayMs: 1000,
			});

			const result = await stream.result();
			expect(fetchCalls).toBe(1);
			expect(result.stopReason).toBe("error");
			expect(result.errorMessage).toContain("Server requested 121s retry delay (max: 1s)");
		});
	});
});