import { execSync } from 'child_process';
import fs from 'fs';
import os from 'os';
import path from 'path';
import { stringify } from 'yaml';

export function createTempDir(): string {
  return fs.mkdtempSync(path.join(os.tmpdir(), 'nanoclaw-test-'));
}

export function setupNanoclawDir(tmpDir: string): void {
  fs.mkdirSync(path.join(tmpDir, '.nanoclaw', 'base', 'src'), { recursive: true });
  fs.mkdirSync(path.join(tmpDir, '.nanoclaw', 'backup'), { recursive: true });
}

export function writeState(tmpDir: string, state: any): void {
  const statePath = path.join(tmpDir, '.nanoclaw', 'state.yaml');
  fs.writeFileSync(statePath, stringify(state), 'utf-8');
}

export function createMinimalState(tmpDir: string): void {
  writeState(tmpDir, {
    skills_system_version: '0.1.0',
    core_version: '1.0.0',
    applied_skills: [],
  });
}

export function createSkillPackage(tmpDir: string, opts: {
  skill?: string;
  version?: string;
  core_version?: string;
  adds?: string[];
  modifies?: string[];
  addFiles?: Record<string, string>;
  modifyFiles?: Record<string, string>;
  conflicts?: string[];
  depends?: string[];
  test?: string;
  structured?: any;
  file_ops?: any[];
  post_apply?: string[];
  min_skills_system_version?: string;
  dirName?: string;
}): string {
  const skillDir = path.join(tmpDir, opts.dirName ?? 'skill-pkg');
  fs.mkdirSync(skillDir, { recursive: true });

  const manifest: Record<string, unknown> = {
    skill: opts.skill ?? 'test-skill',
    version: opts.version ?? '1.0.0',
    description: 'Test skill',
    core_version: opts.core_version ?? '1.0.0',
    adds: opts.adds ?? [],
    modifies: opts.modifies ?? [],
    conflicts: opts.conflicts ?? [],
    depends: opts.depends ?? [],
    test: opts.test,
    structured: opts.structured,
    file_ops: opts.file_ops,
  };
  if (opts.post_apply) manifest.post_apply = opts.post_apply;
  if (opts.min_skills_system_version) manifest.min_skills_system_version = opts.min_skills_system_version;

  fs.writeFileSync(path.join(skillDir, 'manifest.yaml'), stringify(manifest));

  if (opts.addFiles) {
    const addDir = path.join(skillDir, 'add');
    for (const [relPath, content] of Object.entries(opts.addFiles)) {
      const fullPath = path.join(addDir, relPath);
      fs.mkdirSync(path.dirname(fullPath), { recursive: true });
      fs.writeFileSync(fullPath, content);
    }
  }

  if (opts.modifyFiles) {
    const modDir = path.join(skillDir, 'modify');
    for (const [relPath, content] of Object.entries(opts.modifyFiles)) {
      const fullPath = path.join(modDir, relPath);
      fs.mkdirSync(path.dirname(fullPath), { recursive: true });
      fs.writeFileSync(fullPath, content);
    }
  }

  return skillDir;
}

export function initGitRepo(dir: string): void {
  execSync('git init', { cwd: dir, stdio: 'pipe' });
  execSync('git config user.email "test@test.com"', { cwd: dir, stdio: 'pipe' });
  execSync('git config user.name "Test"', { cwd: dir, stdio: 'pipe' });
  execSync('git config rerere.enabled true', { cwd: dir, stdio: 'pipe' });
  fs.writeFileSync(path.join(dir, '.gitignore'), 'node_modules\n');
  execSync('git add -A && git commit -m "init"', { cwd: dir, stdio: 'pipe' });
}

export function cleanup(dir: string): void {
  fs.rmSync(dir, { recursive: true, force: true });
}