import { atom, type WritableAtom } from 'nanostores';
import { workbenchStore } from './workbench';

export interface GitHubConfig {
  token?: string;
  username?: string;
  repoName?: string;
}

class GitHubStore {
  config: WritableAtom<GitHubConfig> = atom({});

  async pushToGitHub(token: string, username: string, repoName: string): Promise<void> {
    try {
      // first, create the repository if it doesn't exist
      const createRepoResponse = await fetch(`https://api.github.com/user/repos`, {
        method: 'POST',
        headers: {
          Authorization: `token ${token}`,
          Accept: 'application/vnd.github.v3+json',
          'Content-Type': 'application/json',
        },
        body: JSON.stringify({
          name: repoName,
          private: false,
          auto_init: false,
        }),
      });

      if (!createRepoResponse.ok && createRepoResponse.status !== 422) {
        // 422 means repo already exists
        throw new Error(`Failed to create repository: ${createRepoResponse.statusText}`);
      }

      // get all files from workbench
      const files = workbenchStore.files.get();

      // create a commit with all files
      for (const [filePath, dirent] of Object.entries(files)) {
        if (dirent?.type === 'file' && !dirent.isBinary) {
          const relativePath = filePath.replace(/^\/home\/project\//, '');

          // create/update file in repository
          const response = await fetch(
            `https://api.github.com/repos/${username}/${repoName}/contents/${relativePath}`,
            {
              method: 'PUT',
              headers: {
                Authorization: `token ${token}`,
                Accept: 'application/vnd.github.v3+json',
                'Content-Type': 'application/json',
              },
              body: JSON.stringify({
                message: `Add/Update ${relativePath}`,
                content: btoa(dirent.content), // base64 encode content
              }),
            },
          );

          if (!response.ok) {
            throw new Error(`Failed to push file ${relativePath}: ${response.statusText}`);
          }
        }
      }

      // update config store
      this.config.set({ token, username, repoName });
    } catch (error) {
      console.error('Error pushing to GitHub:', error);
      throw error;
    }
  }
}

export const githubStore = new GitHubStore();