import test from 'node:test';
import assert from 'node:assert/strict';
import fs from 'node:fs/promises';
import os from 'node:os';
import path from 'node:path';

import {
  addProject,
  listProjects,
  removeProject,
  registryFilePath,
  type RegistryProject,
} from '../../src/lib/registry';

const IS_WINDOWS = os.platform() === 'win32';

async function withTempUserProfile(run: (userProfile: string) => Promise<void>): Promise<void> {
  const previous = process.env.USERPROFILE;
  const tempDir = await fs.mkdtemp(path.join(os.tmpdir(), 'beadboard-registry-'));
  process.env.USERPROFILE = tempDir;

  try {
    await run(tempDir);
  } finally {
    if (previous === undefined) {
      delete process.env.USERPROFILE;
    } else {
      process.env.USERPROFILE = previous;
    }

    await fs.rm(tempDir, { recursive: true, force: true });
  }
}

test('registryFilePath resolves under user home/.beadboard/projects.json', async () => {
  await withTempUserProfile(async (userProfile) => {
    const result = registryFilePath();
    assert.equal(result, path.join(userProfile, '.beadboard', 'projects.json'));
  });
});

test('listProjects returns empty when registry does not exist', async () => {
  await withTempUserProfile(async () => {
    const result = await listProjects();
    assert.deepEqual(result, []);
  });
});

if (IS_WINDOWS) {
  test('addProject persists normalized path and deduplicates case/separators', async () => {
    await withTempUserProfile(async () => {
      const first = await addProject('c:/Work/Alpha/');
      assert.equal(first.added, true);

      const second = await addProject('C:\\work\\alpha');
      assert.equal(second.added, false);

      const listed = await listProjects();
      assert.equal(listed.length, 1);
      assert.equal(listed[0].path, 'C:/Work/Alpha');

      const file = await fs.readFile(registryFilePath(), 'utf8');
      const parsed = JSON.parse(file) as { projects: RegistryProject[] };
      assert.equal(parsed.projects.length, 1);
    });
  });

  test('removeProject removes matching normalized path', async () => {
    await withTempUserProfile(async () => {
      await addProject('D:/Repos/One');
      await addProject('D:/Repos/Two');

      const removed = await removeProject('d:\\repos\\one\\');
      assert.equal(removed.removed, true);

      const listed = await listProjects();
      assert.deepEqual(
        listed.map((project) => project.path),
        ['D:/Repos/Two'],
      );
    });
  });
} else {
  test('addProject persists and deduplicates POSIX paths', async () => {
    await withTempUserProfile(async () => {
      const first = await addProject('/opt/projects/alpha');
      assert.equal(first.added, true);

      const second = await addProject('/opt/projects/alpha/');
      assert.equal(second.added, false);

      const listed = await listProjects();
      assert.equal(listed.length, 1);
      assert.equal(listed[0].path, '/opt/projects/alpha');
    });
  });

  test('removeProject removes matching POSIX path', async () => {
    await withTempUserProfile(async () => {
      await addProject('/opt/repos/one');
      await addProject('/opt/repos/two');

      const removed = await removeProject('/opt/repos/one');
      assert.equal(removed.removed, true);

      const listed = await listProjects();
      assert.deepEqual(
        listed.map((project) => project.path),
        ['/opt/repos/two'],
      );
    });
  });
}

test('addProject rejects relative paths', async () => {
  await withTempUserProfile(async () => {
    await assert.rejects(() => addProject('relative/path'), /absolute/i);
  });
});