import { $inject, AlephaError } from "alepha";
import { $logger } from "alepha/logger";
import { FileSystemProvider, ShellProvider } from "alepha/system";
import type {
  RemoteSecret,
  SecretStoreProvider,
} from "./SecretStoreProvider.ts";

/**
 * GitHub Actions secret store backed by the `gh` CLI.
 *
 * Requires the GitHub CLI (`gh`) to be installed and authenticated.
 * Pushes secrets into GitHub Actions environments.
 */
export class GitHubSecretStore implements SecretStoreProvider {
  protected readonly log = $logger();
  protected readonly shell = $inject(ShellProvider);
  protected readonly fs = $inject(FileSystemProvider);

  /**
   * Verify that `gh` is installed and authenticated.
   */
  public async ensureAvailable(): Promise<void> {
    const installed = await this.shell.isInstalled("gh");
    if (!installed) {
      throw new AlephaError(
        "GitHub CLI (gh) is not installed. Install it from https://cli.github.com",
      );
    }

    try {
      await this.shell.run("gh auth status", { capture: true });
    } catch {
      throw new AlephaError(
        "GitHub CLI is not authenticated. Run `gh auth login` first.",
      );
    }
  }

  /**
   * Create the GitHub Actions environment if it doesn't exist.
   */
  public async ensureEnvironment(environment: string): Promise<void> {
    await this.shell.run(
      `gh api --method PUT /repos/{owner}/{repo}/environments/${environment} --silent`,
      { capture: true },
    );
    this.log.debug(`Ensured environment "${environment}" exists`);
  }

  /**
   * List all secrets in a GitHub Actions environment.
   */
  public async list(environment: string): Promise<RemoteSecret[]> {
    try {
      const output = await this.shell.run(
        `gh secret list --env ${environment} --json name,updatedAt`,
        { capture: true },
      );

      const parsed = JSON.parse(output || "[]") as Array<{
        name: string;
        updatedAt?: string;
      }>;

      return parsed.map((s) => ({
        name: s.name,
        updatedAt: s.updatedAt,
      }));
    } catch (error) {
      this.log.debug("Failed to list secrets", { environment, error });
      return [];
    }
  }

  /**
   * Set a secret in a GitHub Actions environment.
   *
   * Writes a dotenv-formatted file and uses `gh secret set --env-file` to
   * avoid shell pipe issues with NodeShellProvider escaping the `|` character.
   */
  public async set(
    environment: string,
    key: string,
    value: string,
  ): Promise<void> {
    const tmpFile = `/tmp/alepha-secret-${key}-${Date.now()}`;
    const escaped = value
      .replace(/\\/g, "\\\\")
      .replace(/"/g, '\\"')
      .replace(/\n/g, "\\n");
    await this.fs.writeFile(tmpFile, `${key}="${escaped}"\n`);
    try {
      const output = await this.shell.run(
        `gh secret set -f ${tmpFile} --env ${environment}`,
        { capture: true },
      );
      this.log.debug(`Secret set: ${key}`, { output });
    } finally {
      await this.fs.rm(tmpFile);
    }
  }

  /**
   * Delete a secret from a GitHub Actions environment.
   */
  public async delete(environment: string, key: string): Promise<void> {
    await this.shell.run(`gh secret delete ${key} --env ${environment}`, {
      capture: true,
    });
  }
}