import { execSync } from "node:child_process";
import { existsSync, rmSync } from "node:fs";
import { log } from "./cli.ts";
import type { RepoContext } from "./github.ts";

export interface SetupOptions {
  tempDir: string;
  repoUrl?: string;
  forceClean?: boolean;
}

/**
 * Setup the test repository for running actions
 */
export function setupTestRepo(options: SetupOptions): void {
  const {
    tempDir,
    repoUrl = "git@github.com:pullfrogai/scratch.git",
    forceClean = false,
  } = options;

  if (existsSync(tempDir)) {
    if (forceClean) {
      log.info("🗑️  Removing existing .temp directory...");
      rmSync(tempDir, { recursive: true, force: true });

      log.info("📦 Cloning pullfrogai/scratch into .temp...");
      execSync(`git clone ${repoUrl} ${tempDir}`, { stdio: "inherit" });
    } else {
      log.info("📦 Resetting existing .temp repository...");
      execSync("git reset --hard HEAD && git clean -fd", {
        cwd: tempDir,
        stdio: "inherit",
      });
    }
  } else {
    log.info("📦 Cloning pullfrogai/scratch into .temp...");
    execSync(`git clone ${repoUrl} ${tempDir}`, { stdio: "inherit" });
  }
}

/**
 * Setup git configuration to avoid identity errors
 * Only runs in GitHub Actions environment to avoid overwriting local git config
 */
export function setupGitConfig(): void {
  // Only set up git config in GitHub Actions environment
  // In local development, use the user's existing git config
  if (!process.env.GITHUB_ACTIONS) {
    log.info("⚠️  Skipping git configuration setup (not in GitHub Actions)");
    return;
  }

  // Debug logging for git repo detection
  log.debug(`setupGitConfig: Current working directory: ${process.cwd()}`);
  log.debug(`setupGitConfig: GITHUB_WORKSPACE: ${process.env.GITHUB_WORKSPACE}`);

  // Check if we're in a git repository before trying to set config
  log.debug(`setupGitConfig: Checking for git repository...`);
  try {
    const gitDir = execSync("git rev-parse --git-dir", { encoding: "utf-8", stdio: "pipe" }).trim();
    log.debug(`setupGitConfig: Git directory found: ${gitDir}`);
  } catch (error) {
    log.warning(
      `⚠️  Skipping git configuration setup (not in a git repository): ${error instanceof Error ? error.message : String(error)}`
    );
    try {
      const dirContents = execSync("ls -la", { encoding: "utf-8", stdio: "pipe" }).trim();
      log.debug(`setupGitConfig: Current directory contents:\n${dirContents}`);
    } catch {
      // Ignore if ls fails
    }
    return;
  }

  log.info("🔧 Setting up git configuration...");
  try {
    execSync('git config user.email "action@pullfrog.ai"', { stdio: "pipe" });
    execSync('git config user.name "Pullfrog Action"', { stdio: "pipe" });
    log.debug("setupGitConfig: ✓ Git configuration set successfully");
  } catch (error) {
    // If git config fails, log warning but don't fail the action
    // This can happen if we're not in a git repo or git isn't available
    log.warning(
      `Failed to set git config: ${error instanceof Error ? error.message : String(error)}`
    );
  }
}

/**
 * Setup git authentication using GitHub token
 * Only runs in GitHub Actions environment to avoid breaking local git remotes
 */
export function setupGitAuth(githubToken: string, repoContext: RepoContext): void {
  // Only set up git auth in GitHub Actions environment
  // In local testing, this would overwrite the real git remote with fake credentials
  if (!process.env.GITHUB_ACTIONS) {
    log.info("⚠️  Skipping git authentication setup (not in GitHub Actions)");
    return;
  }

  log.info("🔐 Setting up git authentication...");

  // Remove existing git auth headers that actions/checkout might have set
  try {
    execSync("git config --unset-all http.https://github.com/.extraheader", { stdio: "inherit" });
    log.info("✓ Removed existing authentication headers");
  } catch {
    log.info("No existing authentication headers to remove");
  }

  // Update remote URL to embed the token
  const remoteUrl = `https://x-access-token:${githubToken}@github.com/${repoContext.owner}/${repoContext.name}.git`;
  execSync(`git remote set-url origin "${remoteUrl}"`, { stdio: "inherit" });
  log.info("✓ Updated remote URL with authentication token");
}