import { expect, test } from "bun:test";
import { copyFile, readFile, rm } from "node:fs/promises";
import { tmpdir } from "node:os";
import { join } from "node:path";
import { randomUUID } from "node:crypto";
import { openKeePassDatabase } from "../../src/keepass";

type FixtureEntry = {
	title: string;
	user: string;
	password: string;
	otp?: string;
};

type FixtureFolder = {
	name: string;
	folders: FixtureFolder[];
	entries: FixtureEntry[];
};

type FixtureData = {
	password: string;
	content: {
		root: FixtureFolder;
	};
};

const FIXTURE_PATH = "tests/fixtures/data.kdbx";
const FIXTURE_DATA_PATH = "tests/fixtures/data.kdbx.json";

async function withTempCopy<T>(filePath: string, fn: (tempPath: string) => Promise<T>): Promise<T> {
	const tempPath = join(tmpdir(), `ts-pykeepass-wrapper-${randomUUID()}.kdbx`);
	await copyFile(filePath, tempPath);
	try {
		return await fn(tempPath);
	} finally {
		await rm(tempPath, { force: true });
	}
}

async function ensurePyKeePass(): Promise<boolean> {
	const python = process.env.PYTHON_PATH ?? ".venv/bin/python3";
	const child = Bun.spawn([python, "-c", "import pykeepass; print('ok')"], {
		stdout: "pipe",
		stderr: "pipe",
	});

	return child.exited.then((code) => code === 0);
}

function flattenEntries(folder: FixtureFolder, groupPath = ""): Array<FixtureEntry & { groupPath: string }> {
	const ownEntries = folder.entries.map((entry) => ({ ...entry, groupPath }));
	const nestedEntries = folder.folders.flatMap((child) => flattenEntries(child, groupPath ? `${groupPath}/${child.name}` : child.name));
	return [...ownEntries, ...nestedEntries];
}

function groupTreeToString(folder: FixtureFolder, indent = ""): string[] {
	const lines = [`${indent}${folder.name || "Racine"}/`];
	for (const entry of folder.entries) {
		lines.push(`${indent}	- ${entry.title}`);
	}
	for (const child of folder.folders) {
		lines.push(...groupTreeToString(child, `${indent}	`));
	}
	return lines;
}

test("opens the bundled data fixture and exposes all entries and values", async () => {
	const [{ password, content }, pykeepassReady] = await Promise.all([
		readFile(FIXTURE_DATA_PATH, "utf8").then((raw) => JSON.parse(raw) as FixtureData),
		ensurePyKeePass(),
	]);

	if (!pykeepassReady) {
		console.log("Skipping integration test: pykeepass is not installed");
		return;
	}

	const expectedEntries = flattenEntries(content.root);
	const db = openKeePassDatabase(FIXTURE_PATH, { password });
	const entries = await db.listEntries();

	expect(entries).toHaveLength(expectedEntries.length);
	expect(entries.map((entry) => entry.title).sort()).toEqual(expectedEntries.map((entry) => entry.title).sort());

	for (const expected of expectedEntries) {
		const actual = entries.find((entry) => entry.title === expected.title);
		expect(actual).toBeTruthy();
		expect(actual?.username).toBe(expected.user);
		expect(actual?.password).toBe(expected.password);
		expect(actual?.notes).toBe("");
		expect(actual?.url).toBe("");
		expect(actual?.groupPath).toBe(expected.groupPath);
		if (expected.otp) {
			expect(actual?.otp).toBe(expected.otp);
		}
	}
});

test("lists the groups from the bundled data fixture", async () => {
	const [{ password }, pykeepassReady] = await Promise.all([
		readFile(FIXTURE_DATA_PATH, "utf8").then((raw) => JSON.parse(raw) as FixtureData),
		ensurePyKeePass(),
	]);

	if (!pykeepassReady) {
		console.log("Skipping integration test: pykeepass is not installed");
		return;
	}

	const db = openKeePassDatabase(FIXTURE_PATH, { password });
	const groups = await db.listGroups();
	expect(groups).toEqual([
		{ name: "Racine", path: "" },
		{ name: "Folder1", path: "Folder1" },
		{ name: "Folder2", path: "Folder2" },
	]);
});

test("finds entries in the bundled data fixture", async () => {
	const [{ password }, pykeepassReady] = await Promise.all([
		readFile(FIXTURE_DATA_PATH, "utf8").then((raw) => JSON.parse(raw) as FixtureData),
		ensurePyKeePass(),
	]);

	if (!pykeepassReady) {
		console.log("Skipping integration test: pykeepass is not installed");
		return;
	}

	const db = openKeePassDatabase(FIXTURE_PATH, { password });
	const entries = await db.findEntries({ title: "f1-item1" });

	expect(entries).toHaveLength(1);
	expect(entries[0]?.title).toBe("f1-item1");
	expect(entries[0]?.username).toBe("f1-item1");
	expect(entries[0]?.password).toBe("123");
	expect(entries[0]?.groupPath).toBe("Folder1");
});

test("creates entries in a temporary copy of the bundled fixture and persists them", async () => {
	const [{ password }, pykeepassReady] = await Promise.all([
		readFile(FIXTURE_DATA_PATH, "utf8").then((raw) => JSON.parse(raw) as FixtureData),
		ensurePyKeePass(),
	]);

	if (!pykeepassReady) {
		console.log("Skipping integration test: pykeepass is not installed");
		return;
	}

	await withTempCopy(FIXTURE_PATH, async (tempPath) => {
		const db = openKeePassDatabase(tempPath, { password });
		const createdEntry = await db.createEntry({
			title: "TempEntry",
			username: "temp-user",
			password: "temp-pass",
		});
		expect(createdEntry.title).toBe("TempEntry");
		expect(createdEntry.username).toBe("temp-user");

		const persisted = await db.findEntries({ title: "TempEntry" });
		expect(persisted).toHaveLength(1);
		expect(persisted[0]?.username).toBe("temp-user");
	});
});


test("creates nested groups on a temporary copy", async () => {
	const [{ password }, pykeepassReady] = await Promise.all([
		readFile(FIXTURE_DATA_PATH, "utf8").then((raw) => JSON.parse(raw) as FixtureData),
		ensurePyKeePass(),
	]);

	if (!pykeepassReady) {
		console.log("Skipping integration test: pykeepass is not installed");
		return;
	}

	await withTempCopy(FIXTURE_PATH, async (tempPath) => {
		const db = openKeePassDatabase(tempPath, { password });
		const createdGroup = await db.createGroup({ name: "Nested", path: "Folder1" });
		expect(createdGroup.path).toBe("Folder1/Nested");

		const groups = await db.listGroups();
		expect(groups.some((group) => group.path === "Folder1/Nested")).toBe(true);
	});
});


test("uses the JSON fixture content as the source of truth for expectations", async () => {
	const { content } = JSON.parse(await readFile(FIXTURE_DATA_PATH, "utf8")) as FixtureData;

	expect(content.root.folders).toHaveLength(2);
	expect(content.root.entries).toHaveLength(2);
	expect(flattenEntries(content.root)).toEqual([
		{ title: "root", user: "root", password: "123", groupPath: "" },
		{ title: "otp1", user: "otp1", password: "123", otp: "otpauth://totp/otp1:otp1?secret=234324AB34%3D%3D%3D%3D%3D%3D&period=30&digits=6&issuer=otp1", groupPath: "" },
		{ title: "f1-item1", user: "f1-item1", password: "123", groupPath: "Folder1" },
		{ title: "f2-item1", user: "f2-item1", password: "123", groupPath: "Folder2" },
	]);
	expect(groupTreeToString(content.root)).toEqual([
		"Racine/",
		"\t- root",
		"\t- otp1",
		"\tFolder1/",
		"\t\t- f1-item1",
		"\tFolder2/",
		"\t\t- f2-item1",
	]);
});