import { mkdirSync, readFileSync, realpathSync, rmSync } from "node:fs";
import { tmpdir } from "node:os";
import { join } from "node:path";
import { afterEach, beforeEach, describe, expect, it } from "vitest";
import { ENV_AGENT_DIR } from "../src/config.js";
import { main } from "../src/main.js";

describe("package commands", () => {
	let tempDir: string;
	let agentDir: string;
	let projectDir: string;
	let packageDir: string;
	let originalCwd: string;
	let originalAgentDir: string | undefined;

	beforeEach(() => {
		tempDir = join(tmpdir(), `pi-package-commands-${Date.now()}-${Math.random().toString(36).slice(2)}`);
		agentDir = join(tempDir, "agent");
		projectDir = join(tempDir, "project");
		packageDir = join(tempDir, "local-package");
		mkdirSync(agentDir, { recursive: true });
		mkdirSync(projectDir, { recursive: true });
		mkdirSync(packageDir, { recursive: true });

		originalCwd = process.cwd();
		originalAgentDir = process.env[ENV_AGENT_DIR];
		process.env[ENV_AGENT_DIR] = agentDir;
		process.chdir(projectDir);
	});

	afterEach(() => {
		process.chdir(originalCwd);
		if (originalAgentDir === undefined) {
			delete process.env[ENV_AGENT_DIR];
		} else {
			process.env[ENV_AGENT_DIR] = originalAgentDir;
		}
		rmSync(tempDir, { recursive: true, force: true });
	});

	it("should persist global relative local package paths relative to settings.json", async () => {
		const relativePkgDir = join(projectDir, "packages", "local-package");
		mkdirSync(relativePkgDir, { recursive: true });

		await main(["install", "./packages/local-package"]);

		const settingsPath = join(agentDir, "settings.json");
		const settings = JSON.parse(readFileSync(settingsPath, "utf-8")) as { packages?: string[] };
		expect(settings.packages?.length).toBe(1);
		const stored = settings.packages?.[0] ?? "";
		const resolvedFromSettings = realpathSync(join(agentDir, stored));
		expect(resolvedFromSettings).toBe(realpathSync(relativePkgDir));
	});

	it("should remove local packages using a path with a trailing slash", async () => {
		await main(["install", `${packageDir}/`]);

		const settingsPath = join(agentDir, "settings.json");
		const installedSettings = JSON.parse(readFileSync(settingsPath, "utf-8")) as { packages?: string[] };
		expect(installedSettings.packages?.length).toBe(1);

		await main(["remove", `${packageDir}/`]);

		const removedSettings = JSON.parse(readFileSync(settingsPath, "utf-8")) as { packages?: string[] };
		expect(removedSettings.packages ?? []).toHaveLength(0);
	});
});