/**
 * Gitea Integration for AgentDash
 * Provides real-time data from Gitea API
 */

const https = require('https');
const http = require('http');

class GiteaIntegration {
  constructor(config = {}) {
    this.baseUrl = config.baseUrl || 'https://gitea.tophermayor.com';
    this.token = config.token || process.env.GITEA_TOKEN;
    this.owner = config.owner || 'TopherMayor';
    this.cache = new Map();
    this.cacheTimeout = config.cacheTimeout || 30000; // 30 seconds
  }

  /**
   * Make authenticated request to Gitea API
   */
  async request(endpoint) {
    return new Promise((resolve, reject) => {
      const url = new URL(endpoint, this.baseUrl);
      const client = url.protocol === 'https:' ? https : http;

      const options = {
        hostname: url.hostname,
        port: url.port || (url.protocol === 'https:' ? 443 : 80),
        path: url.pathname + url.search,
        method: 'GET',
        headers: {
          'Authorization': `token ${this.token}`,
          'Accept': 'application/json'
        }
      };

      const req = client.request(options, (res) => {
        let data = '';
        res.on('data', chunk => data += chunk);
        res.on('end', () => {
          try {
            resolve(JSON.parse(data));
          } catch (e) {
            reject(new Error(`Failed to parse response: ${e.message}`));
          }
        });
      });

      req.on('error', reject);
      req.setTimeout(10000, () => {
        req.destroy();
        reject(new Error('Request timeout'));
      });
      req.end();
    });
  }

  /**
   * Get cached data or fetch fresh
   */
  async getCached(key, fetcher) {
    const cached = this.cache.get(key);
    if (cached && Date.now() - cached.timestamp < this.cacheTimeout) {
      return cached.data;
    }

    const data = await fetcher();
    this.cache.set(key, { data, timestamp: Date.now() });
    return data;
  }

  /**
   * Get all repositories for the owner
   */
  async getRepos() {
    return this.getCached('repos', () =>
      this.request(`/api/v1/user/repos?limit=50`)
    );
  }

  /**
   * Get repository details
   */
  async getRepo(repoName) {
    return this.getCached(`repo:${repoName}`, () =>
      this.request(`/api/v1/repos/${this.owner}/${repoName}`)
    );
  }

  /**
   * Get open pull requests for a repository
   */
  async getPullRequests(repoName, state = 'open') {
    return this.getCached(`prs:${repoName}:${state}`, () =>
      this.request(`/api/v1/repos/${this.owner}/${repoName}/pulls?state=${state}&limit=20`)
    );
  }

  /**
   * Get issues for a repository
   */
  async getIssues(repoName, state = 'open') {
    return this.getCached(`issues:${repoName}:${state}`, () =>
      this.request(`/api/v1/repos/${this.owner}/${repoName}/issues?state=${state}&limit=20`)
    );
  }

  /**
   * Get recent commits for a repository
   */
  async getCommits(repoName, branch = 'main', limit = 10) {
    return this.getCached(`commits:${repoName}:${branch}`, () =>
      this.request(`/api/v1/repos/${this.owner}/${repoName}/commits?sha=${branch}&limit=${limit}`)
    );
  }

  /**
   * Get branches for a repository
   */
  async getBranches(repoName) {
    return this.getCached(`branches:${repoName}`, () =>
      this.request(`/api/v1/repos/${this.owner}/${repoName}/branches`)
    );
  }

  /**
   * Get repository activity feed
   */
  async getActivity(repoName) {
    return this.getCached(`activity:${repoName}`, () =>
      this.request(`/api/v1/repos/${this.owner}/${repoName}/activities/feeds?limit=20`)
    );
  }

  /**
   * Get user info
   */
  async getUser() {
    return this.getCached('user', () =>
      this.request('/api/v1/user')
    );
  }

  /**
   * Get organization info (if applicable)
   */
  async getOrgs() {
    return this.getCached('orgs', () =>
      this.request('/api/v1/user/orgs')
    );
  }

  /**
   * Clear cache
   */
  clearCache() {
    this.cache.clear();
  }

  /**
   * Get swarm summary - all repos with PRs and issues
   */
  async getSwarmSummary() {
    const repos = await this.getRepos();
    const summary = [];

    for (const repo of repos.slice(0, 10)) { // Limit to 10 repos
      try {
        const [prs, issues, branches] = await Promise.all([
          this.getPullRequests(repo.name, 'open').catch(() => []),
          this.getIssues(repo.name, 'open').catch(() => []),
          this.getBranches(repo.name).catch(() => [])
        ]);

        summary.push({
          name: repo.name,
          full_name: repo.full_name,
          stars: repo.stars_count || 0,
          forks: repo.forks_count || 0,
          open_prs: prs.length,
          open_issues: issues.length,
          branches: branches.length,
          updated_at: repo.updated_at,
          html_url: repo.html_url
        });
      } catch (e) {
        console.error(`Error fetching data for ${repo.name}:`, e.message);
      }
    }

    return summary;
  }

  /**
   * Get pending reviews (PRs needing attention)
   */
  async getPendingReviews() {
    const repos = await this.getRepos();
    const pending = [];

    for (const repo of repos.slice(0, 10)) {
      try {
        const prs = await this.getPullRequests(repo.name, 'open');
        for (const pr of prs) {
          pending.push({
            repo: repo.name,
            repo_url: repo.html_url,
            pr_number: pr.number,
            pr_title: pr.title,
            pr_url: pr.html_url,
            author: pr.user?.login,
            created_at: pr.created_at,
            mergeable: pr.mergeable,
            draft: pr.draft,
            labels: pr.labels || []
          });
        }
      } catch (e) {
        console.error(`Error fetching PRs for ${repo.name}:`, e.message);
      }
    }

    return pending;
  }

  /**
   * Get recent activity across all repos
   */
  async getRecentActivity() {
    const repos = await this.getRepos();
    const activities = [];

    for (const repo of repos.slice(0, 5)) {
      try {
        const activity = await this.getActivity(repo.name);
        for (const act of (activity || []).slice(0, 5)) {
          activities.push({
            repo: repo.name,
            repo_url: repo.html_url,
            ...act
          });
        }
      } catch (e) {
        // Skip repos without activity access
      }
    }

    return activities
      .sort((a, b) => new Date(b.created_at) - new Date(a.created_at))
      .slice(0, 20);
  }
}

module.exports = GiteaIntegration;