import { cloneDeep } from "@zwave-js/shared/safe";
import fs from "fs-extra";
import path from "path";
import { jsonToNVM, migrateNVM } from ".";
import {
	json500To700,
	json700To500,
	jsonToNVM500,
	nvm500ToJSON,
	NVMJSON,
	nvmToJSON,
} from "./convert";
import type { NVM500JSON } from "./nvm500/NVMParser";

describe("NVM conversion tests", () => {
	describe("700-series, binary to JSON", () => {
		const fixturesDir = path.join(
			__dirname,
			"../test/fixtures/nvm_700_binary",
		);
		const files = fs.readdirSync(fixturesDir);

		for (const file of files) {
			it(file, async () => {
				const data = await fs.readFile(path.join(fixturesDir, file));
				const json = nvmToJSON(data);
				expect(json).toMatchSnapshot();
			});
		}
	});

	describe("700 series, JSON to NVM to JSON round-trip", () => {
		const fixturesDir = path.join(
			__dirname,
			"../test/fixtures/nvm_700_json",
		);
		const files = fs.readdirSync(fixturesDir);

		for (const file of files) {
			it(file, async () => {
				const jsonInput: Required<NVMJSON> = await fs.readJson(
					path.join(fixturesDir, file),
				);
				const nvm = jsonToNVM(
					jsonInput,
					jsonInput.controller.protocolVersion,
				);
				const jsonOutput = nvmToJSON(nvm);
				// @ts-expect-error
				if (!("meta" in jsonInput)) delete jsonOutput.meta;

				expect(jsonOutput).toEqual(jsonInput);
			});
		}
	});

	describe("700 series, NVM to JSON to NVM invariants", () => {
		const fixturesDir = path.join(
			__dirname,
			"../test/fixtures/nvm_700_invariants",
		);
		const files = fs.readdirSync(fixturesDir);

		for (const file of files) {
			it(file, async () => {
				const nvmIn = await fs.readFile(path.join(fixturesDir, file));

				const version = /_(\d+\.\d+\.\d+)[_.]/.exec(file)![1];
				const json = nvmToJSON(nvmIn);
				const nvmOut = jsonToNVM(json, version);

				expect(nvmOut).toEqual(nvmIn);
			});
		}
	});

	describe("500-series, binary to JSON", () => {
		const fixturesDir = path.join(
			__dirname,
			"../test/fixtures/nvm_500_binary",
		);
		const files = fs.readdirSync(fixturesDir);

		for (const file of files) {
			it(file, async () => {
				const data = await fs.readFile(path.join(fixturesDir, file));
				const json = nvm500ToJSON(data);
				expect(json).toMatchSnapshot();
			});
		}
	});

	describe("500 series, NVM to JSON to NVM invariants", () => {
		const fixturesDir = path.join(
			__dirname,
			"../test/fixtures/nvm_500_invariants",
		);
		const files = fs.readdirSync(fixturesDir);

		// For debugging purposes
		// function toHex(buffer: Buffer): string {
		// 	let ret: string =
		// 		"      00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f";
		// 	for (let i = 0; i < buffer.length; i++) {
		// 		if (i % 16 === 0) {
		// 			ret += "\n" + i.toString(16).padStart(4, "0") + ": ";
		// 		}
		// 		ret += buffer[i].toString(16).padStart(2, "0");
		// 		if (i % 16 !== 15) {
		// 			ret += " ";
		// 		}
		// 	}
		// 	return ret;
		// }

		for (const file of files) {
			it(file, async () => {
				const nvmIn = await fs.readFile(path.join(fixturesDir, file));

				// const lib = /_(static|bridge)_/.exec(file)![1];
				const json = nvm500ToJSON(nvmIn);
				const nvmOut = jsonToNVM500(
					json,
					json.controller.protocolVersion,
				);

				expect(nvmOut).toEqual(nvmIn);
			});
		}
	});

	describe("500 to 700 series JSON conversion", () => {
		const fixturesDir = path.join(
			__dirname,
			"../test/fixtures/nvm_500_json",
		);
		const files = fs.readdirSync(fixturesDir);

		for (const file of files) {
			it(file, async () => {
				const json500: NVM500JSON = await fs.readJson(
					path.join(fixturesDir, file),
				);
				const json700 = json500To700(json500, true);
				expect(json700).toMatchSnapshot();
			});
		}
	});

	describe("500 to 700 to 500 series JSON round-trip", () => {
		const fixturesDir = path.join(
			__dirname,
			"../test/fixtures/nvm_500_json",
		);
		const files = fs.readdirSync(fixturesDir);

		for (const file of files) {
			it(file, async () => {
				const json500: NVM500JSON = await fs.readJson(
					path.join(fixturesDir, file),
				);
				const json700 = json500To700(json500, true);
				const output = json700To500(json700);
				const expected = cloneDeep(json500);
				// There are some expected normalizations
				delete expected.meta;
				if (expected.controller.applicationData) {
					while (
						expected.controller.applicationData.startsWith("00")
					) {
						expected.controller.applicationData =
							expected.controller.applicationData.slice(2);
					}
					while (expected.controller.applicationData.endsWith("00")) {
						expected.controller.applicationData =
							expected.controller.applicationData.slice(0, -2);
					}
					if (expected.controller.applicationData.length > 1024) {
						expected.controller.applicationData =
							expected.controller.applicationData.slice(0, 1024);
					}
				}
				expect(output).toEqual(expected);
			});
		}
	});

	it("700 to 700 migration shortcut", async () => {
		const fixturesDir = path.join(
			__dirname,
			"../test/fixtures/nvm_700_binary",
		);

		const nvmSource = await fs.readFile(
			path.join(fixturesDir, "ctrlr_backup_700_7.11.bin"),
		);
		const nvmTarget = await fs.readFile(
			path.join(fixturesDir, "ctrlr_backup_700_7.16_1.bin"),
		);
		const converted = migrateNVM(nvmSource, nvmTarget);

		expect(converted).toEqual(nvmSource);
	});
});