import assert from "node:assert/strict";
import { describe, it } from "node:test";
import {
  collectArchitectureGuardrailViolations,
  countLines,
  evaluateRule,
} from "./check-architecture-guardrails.mjs";

describe("architecture guardrails", () => {
  it("counts lines consistently for maxLines checks", () => {
    assert.equal(countLines("a\nb\nc"), 3);
  });

  it("reports required, forbidden, and maxLines violations together", () => {
    const violations = evaluateRule(
      {
        file: "apps/web/src/example.ts",
        maxLines: 2,
        required: [{ pattern: /\bexpectedHelper\b/, message: "must call the extracted helper" }],
        forbidden: [{ pattern: /\binlineLogic\b/, message: "must not re-inline complex logic" }],
      },
      "inlineLogic();\nconst a = 1;\nconst b = 2;\n",
    );

    assert.deepEqual(violations, [
      "apps/web/src/example.ts: missing guardrail anchor: must call the extracted helper",
      "apps/web/src/example.ts: forbidden pattern matched: must not re-inline complex logic",
      "apps/web/src/example.ts: file grew to 4 lines and exceeds maxLines=2; split the ownership surface before expanding it further",
    ]);
  });

  it("returns no violations when a rule is satisfied", () => {
    const violations = evaluateRule(
      {
        file: "packages/api/src/example.ts",
        maxLines: 4,
        required: [{ pattern: /\bderiveThing\b/, message: "must keep derivation centralized" }],
        forbidden: [{ pattern: /\bunsafeThing\b/, message: "must not use unsafe helper" }],
      },
      "export function deriveThing() {\n  return true;\n}\n",
    );

    assert.deepEqual(violations, []);
  });

  it("reads sources through the injected reader when collecting violations", async () => {
    const violations = await collectArchitectureGuardrailViolations(
      [
        {
          file: "apps/web/src/example.ts",
          maxLines: 2,
          required: [],
          forbidden: [],
        },
      ],
      {
        workspaceRoot: "/virtual/repo",
        readSource: async (filePath) => {
          assert.equal(filePath, "/virtual/repo/apps/web/src/example.ts");
          return "line1\nline2\nline3\n";
        },
      },
    );

    assert.deepEqual(violations, [
      "apps/web/src/example.ts: file grew to 4 lines and exceeds maxLines=2; split the ownership surface before expanding it further",
    ]);
  });
});