import { describe, test, afterEach } from "node:test";
import assert from "node:assert/strict";
import { mkdtempSync, rmSync, mkdirSync, writeFileSync, existsSync } from "node:fs";
import { join, resolve } from "node:path";
import { tmpdir } from "node:os";
import { getAnalyticsRoot, getDataRoot, findPluginRoot } from "../src/utils/storage.js";

// M0: the data root moved OUT of the plugin tree to the external per-user dir
// (~/.claude/linkedin-studio), behind getDataRoot(). getAnalyticsRoot() is now a
// thin alias = getDataRoot("analytics") that still honors the deprecated
// ANALYTICS_ROOT env for back-compat (D4). findPluginRoot stays — it now locates
// bundled read-only assets only (commit 798484b, the fresh-clone crash fix).
//
// The default must be stubbed via HOME + LINKEDIN_STUDIO_DATA save/restore so it
// never couples to the dev's real $HOME. Mirrors the .mjs twin test
// (hooks/scripts/__tests__/data-root.test.mjs) — keep them in sync.
describe("data root resolution", () => {
  let tempDir: string | undefined;
  const saved = {
    ANALYTICS_ROOT: process.env.ANALYTICS_ROOT,
    LINKEDIN_STUDIO_DATA: process.env.LINKEDIN_STUDIO_DATA,
    HOME: process.env.HOME,
    USERPROFILE: process.env.USERPROFILE,
  };

  afterEach(() => {
    if (tempDir && existsSync(tempDir)) {
      rmSync(tempDir, { recursive: true, force: true });
    }
    tempDir = undefined;
    for (const [k, v] of Object.entries(saved)) {
      if (v === undefined) delete process.env[k];
      else process.env[k] = v;
    }
  });

  describe("findPluginRoot", () => {
    test("walks up to the directory containing .claude-plugin/plugin.json", () => {
      tempDir = mkdtempSync(join(tmpdir(), "plugin-root-"));
      mkdirSync(join(tempDir, ".claude-plugin"), { recursive: true });
      writeFileSync(join(tempDir, ".claude-plugin", "plugin.json"), "{}");
      // Mimic the real depth: scripts/analytics/src/utils
      const start = join(tempDir, "scripts", "analytics", "src", "utils");
      mkdirSync(start, { recursive: true });

      assert.equal(findPluginRoot(start), tempDir);
    });

    test("returns null when no marker exists up-tree", () => {
      tempDir = mkdtempSync(join(tmpdir(), "no-marker-"));
      const start = join(tempDir, "a", "b", "c");
      mkdirSync(start, { recursive: true });

      assert.equal(findPluginRoot(start), null);
    });
  });

  describe("getDataRoot", () => {
    test("external default (HOME-stubbed): getDataRoot('analytics') = HOME/.claude/linkedin-studio/analytics", () => {
      process.env.HOME = "/home/tester";
      delete process.env.USERPROFILE;
      delete process.env.LINKEDIN_STUDIO_DATA;

      assert.equal(
        getDataRoot("analytics"),
        join("/home/tester", ".claude", "linkedin-studio", "analytics"),
      );
    });

    test("LINKEDIN_STUDIO_DATA override wins", () => {
      process.env.LINKEDIN_STUDIO_DATA = "/tmp/lis-data";

      assert.equal(getDataRoot("analytics"), join("/tmp/lis-data", "analytics"));
    });
  });

  describe("getAnalyticsRoot", () => {
    test("default (no env) now resolves to the EXTERNAL data dir, not in-plugin assets/analytics", () => {
      process.env.HOME = "/home/tester";
      delete process.env.USERPROFILE;
      delete process.env.LINKEDIN_STUDIO_DATA;
      delete process.env.ANALYTICS_ROOT;

      assert.equal(
        getAnalyticsRoot(),
        join("/home/tester", ".claude", "linkedin-studio", "analytics"),
      );
    });

    test("honors deprecated ANALYTICS_ROOT alias (resolved env path) for back-compat", () => {
      tempDir = mkdtempSync(join(tmpdir(), "analytics-root-"));
      process.env.ANALYTICS_ROOT = tempDir;

      assert.equal(getAnalyticsRoot(), resolve(tempDir));
    });

    test("LINKEDIN_STUDIO_DATA drives the analytics root when ANALYTICS_ROOT is unset", () => {
      delete process.env.ANALYTICS_ROOT;
      process.env.LINKEDIN_STUDIO_DATA = "/tmp/lis-data";

      assert.equal(getAnalyticsRoot(), join("/tmp/lis-data", "analytics"));
    });
  });
});