import { describe, it, expect } from "vitest";
import { createDirectoryModel } from "../src/directory-model.js";
import { populateRoutingMetadata } from "../src/routing-metadata.js";

describe("routing metadata", () => {
	it("generates tags from file purposes and exports", () => {
		const model = createDirectoryModel({
			dir: "src/auth",
			role: "Auth layer",
			files: [
				{
					name: "tokens.ts",
					purpose: "JWT generation and validation",
					exports: ["issueToken", "verifyToken"],
					deps: ["crypto"],
				},
			],
			arch: "Auth",
		});

		populateRoutingMetadata(model);
		expect(model.tags.length).toBeGreaterThan(0);
		expect(model.tags).toContain("jwt");
		expect(model.tags).toContain("token");
	});

	it("generates symbols from exports", () => {
		const model = createDirectoryModel({
			dir: "src/utils",
			role: "Utilities",
			files: [
				{
					name: "helpers.ts",
					purpose: "Helpers",
					exports: ["formatDate", "parseUrl", "formatDate"],
					deps: [],
				},
			],
			arch: "Utils",
		});

		populateRoutingMetadata(model);
		expect(model.symbols.length).toBeGreaterThan(0);
		expect(model.symbols).toContain("formatDate");
		expect(model.symbols).toContain("parseUrl");
	});

	it("caps tags at default limit", () => {
		const model = createDirectoryModel({
			dir: "src/big",
			role: "Big module",
			files: Array.from({ length: 20 }, (_, i) => ({
				name: `file${i}.ts`,
				purpose: `Purpose ${i} with many unique words ${i}`,
				exports: [`export${i}A`, `export${i}B`],
				deps: [`dep${i}`],
			})),
			arch: "Big",
		});

		populateRoutingMetadata(model);
		expect(model.tags.length).toBeLessThanOrEqual(8);
	});

	it("caps symbols at default limit", () => {
		const model = createDirectoryModel({
			dir: "src/big",
			role: "Big module",
			files: Array.from({ length: 20 }, (_, i) => ({
				name: `file${i}.ts`,
				purpose: `Purpose ${i}`,
				exports: [`export${i}A`, `export${i}B`],
				deps: [],
			})),
			arch: "Big",
		});

		populateRoutingMetadata(model);
		expect(model.symbols.length).toBeLessThanOrEqual(8);
	});

	it("generates workflow hints for source directories", () => {
		const model = createDirectoryModel({
			dir: "src/cli",
			role: "CLI",
			files: [
				{
					name: "cli.ts",
					purpose: "CLI entrypoint",
					exports: ["main"],
					deps: [],
				},
				{
					name: "cli.test.ts",
					purpose: "CLI tests",
					exports: [],
					deps: [],
				},
			],
			arch: "CLI",
		});

		populateRoutingMetadata(model);
		expect(model.workflows.length).toBeGreaterThan(0);
		const changeBehavior = model.workflows.find((w) =>
			w.task.includes("change"),
		);
		expect(changeBehavior).toBeDefined();
	});

	it("omits workflows for non-source directories", () => {
		const model = createDirectoryModel({
			dir: "docs",
			role: "Documentation",
			files: [
				{
					name: "README.md",
					purpose: "Readme",
					exports: [],
					deps: [],
				},
			],
			arch: "Docs",
		});

		populateRoutingMetadata(model);
		expect(model.workflows).toEqual([]);
	});

	it("caps workflow hints at default limit", () => {
		const model = createDirectoryModel({
			dir: "src/cli",
			role: "CLI",
			files: [
				{ name: "cli.ts", purpose: "CLI", exports: ["main"], deps: [] },
				{ name: "config.ts", purpose: "Config", exports: [], deps: [] },
				{ name: "cli.test.ts", purpose: "Tests", exports: [], deps: [] },
				{ name: "commands.ts", purpose: "Commands", exports: [], deps: [] },
			],
			arch: "CLI",
		});
		model.children = ["src/cli/sub"];

		populateRoutingMetadata(model);
		expect(model.workflows.length).toBeLessThanOrEqual(5);
	});

	it("workflow hints include read targets for relevant files", () => {
		const model = createDirectoryModel({
			dir: "src/auth",
			role: "Auth",
			files: [
				{
					name: "tokens.ts",
					purpose: "Tokens",
					exports: ["issueToken"],
					deps: [],
				},
				{
					name: "tokens.test.ts",
					purpose: "Token tests",
					exports: [],
					deps: [],
				},
			],
			arch: "Auth",
		});

		populateRoutingMetadata(model);
		const testWorkflow = model.workflows.find((w) => w.task.includes("test"));
		expect(testWorkflow).toBeDefined();
		expect(testWorkflow!.read).toContain("tokens.test.ts");
	});

	it("workflow hints include index targets for directories with children", () => {
		const model = createDirectoryModel({
			dir: "src",
			role: "Source",
			files: [
				{
					name: "index.ts",
					purpose: "Exports",
					exports: [],
					deps: [],
				},
			],
			arch: "Source",
			children: ["src/auth", "src/cli"],
		});

		populateRoutingMetadata(model);
		const exploreWorkflow = model.workflows.find((w) =>
			w.task.includes("explore"),
		);
		expect(exploreWorkflow).toBeDefined();
		expect(exploreWorkflow!.index).toContain("src/auth/.pi-map.index.md");
		expect(exploreWorkflow!.index).toContain("src/cli/.pi-map.index.md");
	});

	it("respects explicit tagCap and workflowHintCap options", () => {
		const model = createDirectoryModel({
			dir: "src/big",
			role: "Big module",
			files: Array.from({ length: 20 }, (_, i) => ({
				name: `file${i}.ts`,
				purpose: `Purpose ${i} with many unique words ${i}`,
				exports: [`export${i}A`, `export${i}B`],
				deps: [`dep${i}`],
			})),
			arch: "Big",
			children: ["src/big/sub"],
		});

		populateRoutingMetadata(model, { tagCap: 3, workflowHintCap: 2 });
		expect(model.tags.length).toBeLessThanOrEqual(3);
		expect(model.symbols.length).toBeLessThanOrEqual(3);
		expect(model.workflows.length).toBeLessThanOrEqual(2);
	});
});