import { symlink } from "node:fs/promises";
import { join } from "node:path";
import { describe, expect, it } from "vitest";
import { NodeExecutionEnv } from "../../src/harness/execution-env.js";
import { expandPromptTemplate, loadPromptTemplates } from "../../src/harness/prompt-templates.js";
import { createTempDir } from "./session-test-utils.js";

describe("loadPromptTemplates", () => {
	it("loads markdown templates non-recursively from one or more dirs", async () => {
		const root = createTempDir();
		const env = new NodeExecutionEnv({ cwd: root });
		await env.createDir("a/nested", { recursive: true });
		await env.createDir("b", { recursive: true });
		await env.writeFile("a/one.md", "---\ndescription: One template\n---\nHello $1");
		await env.writeFile("a/nested/ignored.md", "Ignored");
		await env.writeFile("b/two.md", "First line description\nBody");

		const templates = await loadPromptTemplates(env, ["a", "b"]);

		expect(templates).toEqual([
			{ name: "one", description: "One template", content: "Hello $1" },
			{ name: "two", description: "First line description", content: "First line description\nBody" },
		]);
	});

	it("loads explicit markdown files and symlinked files", async () => {
		const root = createTempDir();
		const env = new NodeExecutionEnv({ cwd: root });
		await env.writeFile("target.md", "---\ndescription: Target\n---\nTarget body");
		await symlink(join(root, "target.md"), join(root, "link.md"));

		expect(await loadPromptTemplates(env, ["target.md", "link.md"])).toEqual([
			{ name: "target", description: "Target", content: "Target body" },
			{ name: "link", description: "Target", content: "Target body" },
		]);
	});
});

describe("expandPromptTemplate", () => {
	it("substitutes command arguments", () => {
		const content = "$1 $" + "{@:2} $ARGUMENTS";
		expect(expandPromptTemplate('/one "hello world" test', [{ name: "one", content }])).toBe(
			"hello world test hello world test",
		);
	});
});