import { mkdir, mkdtemp, rm, writeFile } from 'fs/promises';
import os from 'os';
import path from 'path';
import { afterEach, beforeEach, describe, expect, it } from 'vitest';

import { resolveAppManagedOpenCodeRuntimeBinaryPath } from '@main/services/infrastructure/OpenCodeRuntimeInstallerService';
import { setAppDataBasePath } from '@main/utils/pathDecoder';

let tempRoot: string | null = null;

describe('OpenCodeRuntimeInstallerService resolver', () => {
  beforeEach(async () => {
    tempRoot = await mkdtemp(path.join(os.tmpdir(), 'opencode-runtime-resolver-'));
    setAppDataBasePath(tempRoot);
  });

  afterEach(async () => {
    setAppDataBasePath(null);
    if (tempRoot) {
      await rm(tempRoot, { recursive: true, force: true });
      tempRoot = null;
    }
  });

  it('returns the current app-managed OpenCode binary path only when manifest and binary exist', async () => {
    const binaryPath = path.join(
      tempRoot!,
      'data',
      'runtimes',
      'opencode',
      'versions',
      '1.0.0',
      'opencode-test',
      'opencode'
    );
    const manifestPath = path.join(tempRoot!, 'data', 'runtimes', 'opencode', 'current.json');
    await mkdir(path.dirname(binaryPath), { recursive: true });
    await mkdir(path.dirname(manifestPath), { recursive: true });
    await writeFile(binaryPath, 'binary', { mode: 0o755 });
    await writeFile(
      manifestPath,
      `${JSON.stringify({
        schemaVersion: 1,
        version: '1.0.0',
        platformPackage: 'opencode-test',
        binaryPath,
        integrity: 'sha512-test',
        installedAt: '2026-05-12T00:00:00.000Z',
      })}\n`,
      'utf8'
    );

    expect(resolveAppManagedOpenCodeRuntimeBinaryPath()).toBe(binaryPath);
  });

  it('ignores a manifest whose binary path is missing', async () => {
    const manifestPath = path.join(tempRoot!, 'data', 'runtimes', 'opencode', 'current.json');
    await mkdir(path.dirname(manifestPath), { recursive: true });
    await writeFile(
      manifestPath,
      `${JSON.stringify({
        schemaVersion: 1,
        version: '1.0.0',
        platformPackage: 'opencode-test',
        binaryPath: path.join(tempRoot!, 'missing-opencode'),
        integrity: 'sha512-test',
        installedAt: '2026-05-12T00:00:00.000Z',
      })}\n`,
      'utf8'
    );

    expect(resolveAppManagedOpenCodeRuntimeBinaryPath()).toBeNull();
  });
});