import { afterAll, beforeAll, beforeEach, describe, expect, it } from "vitest";
import { Hono } from "hono";
import { Kysely, SqliteDialect } from "kysely";
import SqliteDatabase from "better-sqlite3";
import type { db } from "dbtype";
import { createSettingsRouter } from "../src/route/settings.ts";
import { mapErrorToResponse } from "../src/route/error_handler.ts";
import { get_setting, refreshSetting } from "../src/SettingConfig.ts";
import { PERMISSIONS } from "../src/permission/permission.ts";
import type { AppEnv, AuthStore } from "../src/login.ts";

const normalizeError = (error: unknown): Error => {
	if (error instanceof Error) {
		return error;
	}
	if (typeof error === "string") {
		return new Error(error);
	}
	try {
		return new Error(JSON.stringify(error));
	} catch (_err) {
		return new Error("Unknown error");
	}
};

describe("settings router", () => {
	let sqlite: InstanceType<typeof SqliteDatabase>;
	let database: Kysely<db.DB>;

	beforeAll(async () => {
		process.env.SERVER_HOST = "127.0.0.1";
		process.env.SERVER_PORT = "3000";
		process.env.SERVER_MODE = "development";
		process.env.JWT_SECRET_KEY = "test-secret";

		sqlite = new SqliteDatabase(":memory:");
		const dialect = new SqliteDialect({ database: sqlite });
		database = new Kysely<db.DB>({ dialect });

		await database.schema
			.createTable("app_config")
			.addColumn("key", "text", (col) => col.primaryKey())
			.addColumn("value", "text")
			.execute();

		await refreshSetting(database);
	});

	afterAll(async () => {
		await database.destroy();
		sqlite.close();
	});

	beforeEach(async () => {
		await database.deleteFrom("app_config").execute();
		await refreshSetting(database);
	});

	const createTestApp = (username: string) => {
		const app = new Hono<AppEnv>();
		const auth: AuthStore = {
			user: { username, permission: [] },
			refreshed: false,
			authenticated: true,
		};

		app.use("*", async (c, next) => {
			c.set("auth", auth);
			await next();
		});

		app.onError((err) => {
			const { status, body } = mapErrorToResponse(normalizeError(err));
			return new Response(JSON.stringify(body), {
				status,
				headers: { "Content-Type": "application/json" },
			});
		});

		app.route("/", createSettingsRouter(database));

		return app;
	};

	it("rejects access for non-admin users", async () => {
		const app = createTestApp("guest");
		const response = await app.fetch(new Request("http://localhost/settings"));
		expect(response.status).toBe(403);
	});

	it("returns current configuration for admin", async () => {
		const app = createTestApp("admin");
		const response = await app.fetch(new Request("http://localhost/settings"));
		expect(response.status).toBe(200);

		const payload = await response.json();
		const expected = get_setting();
		expect(payload).toMatchObject({
			persisted: {
				secure: expected.secure,
				cli: expected.cli,
				forbid_remote_admin_login: expected.forbid_remote_admin_login,
				guest: expected.guest,
			},
			env: {
				hostname: expected.hostname,
				port: expected.port,
				mode: expected.mode,
			},
		});
		expect(Array.isArray(payload.permissions)).toBe(true);
		expect(new Set(payload.permissions)).toEqual(new Set(PERMISSIONS));
	});

	it("updates persisted settings and returns the new state", async () => {
		const app = createTestApp("admin");
		const request = new Request("http://localhost/settings", {
			method: "PATCH",
			headers: { "content-type": "application/json" },
			body: JSON.stringify({
				secure: false,
				cli: true,
				guest: ["QueryContent"],
				forbid_remote_admin_login: false,
			}),
		});

		const response = await app.fetch(request);
		expect(response.status).toBe(200);

		const payload = await response.json();
		expect(payload.persisted).toEqual({
			secure: false,
			cli: true,
			forbid_remote_admin_login: false,
			guest: ["QueryContent"],
		});

		// A follow-up GET should reflect the updated values
		const followUp = await app.fetch(new Request("http://localhost/settings"));
		expect(followUp.status).toBe(200);
		const followUpPayload = await followUp.json();
		expect(followUpPayload.persisted).toEqual({
			secure: false,
			cli: true,
			forbid_remote_admin_login: false,
			guest: ["QueryContent"],
		});
	});
});