/**
 * Gitea Automation CLI & API Client for DBK Platform / HomAroma
 * Usage: bun tools/gitea.ts <command> [args]
 */

const GITEA_URL = process.env.GITEA_URL || 'https://git.kittisak.com';
const GITEA_API = process.env.GITEA_API_URL || `${GITEA_URL}/api/v1`;
const GITEA_TOKEN = process.env.GITEA_TOKEN || '';
const OWNER = process.env.GITEA_OWNER || 'admin';
const REPO = process.env.GITEA_REPO || 'homaroma';

if (!GITEA_TOKEN) {
  console.error('Error: GITEA_TOKEN is not set. Please check .env.local');
  process.exit(1);
}

const headers = {
  'Authorization': `token ${GITEA_TOKEN}`,
  'Content-Type': 'application/json',
  'Accept': 'application/json',
};

async function api(path: string, options: RequestInit = {}) {
  const url = `${GITEA_API}${path.startsWith('/') ? path : `/${path}`}`;
  const res = await fetch(url, {
    ...options,
    headers: { ...headers, ...(options.headers || {}) },
  });

  if (!res.ok) {
    const errorText = await res.text();
    throw new Error(`Gitea API Error (${res.status} ${res.statusText}): ${errorText}`);
  }

  const contentType = res.headers.get('content-type');
  if (contentType && contentType.includes('application/json')) {
    return await res.json();
  }
  return await res.text();
}

async function main() {
  const [,, cmd, ...args] = process.argv;

  try {
    switch (cmd) {
      case 'whoami': {
        const user = await api('/user');
        console.log(`Logged in as: ${user.username} (${user.email}) [Admin: ${user.is_admin}]`);
        break;
      }

      case 'repo': {
        const repo = await api(`/repos/${OWNER}/${REPO}`);
        console.log(`Repository: ${repo.full_name}`);
        console.log(`URL: ${repo.html_url}`);
        console.log(`Default Branch: ${repo.default_branch}`);
        console.log(`Open Issues: ${repo.open_issues_count} | Open PRs: ${repo.open_pr_counter}`);
        break;
      }

      case 'issues': {
        const sub = args[0] || 'list';
        if (sub === 'list') {
          const state = args[1] || 'open';
          const issues = await api(`/repos/${OWNER}/${REPO}/issues?state=${state}`);
          if (issues.length === 0) {
            console.log(`No ${state} issues found.`);
          } else {
            console.log(`Found ${issues.length} ${state} issues:`);
            for (const iss of issues) {
              console.log(`  #${iss.number} [${iss.state.toUpperCase()}] ${iss.title} (${iss.html_url})`);
            }
          }
        } else if (sub === 'create') {
          const title = args[1];
          const body = args[2] || '';
          if (!title) {
            console.error('Usage: bun tools/gitea.ts issues create <title> [body]');
            process.exit(1);
          }
          const issue = await api(`/repos/${OWNER}/${REPO}/issues`, {
            method: 'POST',
            body: JSON.stringify({ title, body }),
          });
          console.log(`Created Issue #${issue.number}: ${issue.title}`);
          console.log(`URL: ${issue.html_url}`);
        }
        break;
      }

      case 'prs': {
        const sub = args[0] || 'list';
        if (sub === 'list') {
          const state = args[1] || 'open';
          const prs = await api(`/repos/${OWNER}/${REPO}/pulls?state=${state}`);
          if (prs.length === 0) {
            console.log(`No ${state} pull requests found.`);
          } else {
            console.log(`Found ${prs.length} ${state} pull requests:`);
            for (const pr of prs) {
              console.log(`  #${pr.number} [${pr.state.toUpperCase()}] ${pr.title} (${pr.head.ref} -> ${pr.base.ref})`);
              console.log(`    URL: ${pr.html_url}`);
            }
          }
        } else if (sub === 'create') {
          const [, head, base, title, ...bodyParts] = args;
          const body = bodyParts.join(' ') || '';
          if (!head || !base || !title) {
            console.error('Usage: bun tools/gitea.ts prs create <head_branch> <base_branch> <title> [body]');
            process.exit(1);
          }
          const pr = await api(`/repos/${OWNER}/${REPO}/pulls`, {
            method: 'POST',
            body: JSON.stringify({ head, base, title, body }),
          });
          console.log(`Created Pull Request #${pr.number}: ${pr.title}`);
          console.log(`URL: ${pr.html_url}`);
        }
        break;
      }

      case 'releases': {
        const sub = args[0] || 'list';
        if (sub === 'list') {
          const releases = await api(`/repos/${OWNER}/${REPO}/releases`);
          if (releases.length === 0) {
            console.log('No releases found.');
          } else {
            for (const rel of releases) {
              console.log(`  ${rel.tag_name} - ${rel.name} (${rel.html_url})`);
            }
          }
        } else if (sub === 'create') {
          const tag_name = args[1];
          const name = args[2] || tag_name;
          const body = args[3] || '';
          if (!tag_name) {
            console.error('Usage: bun tools/gitea.ts releases create <tag_name> [title] [notes]');
            process.exit(1);
          }
          const rel = await api(`/repos/${OWNER}/${REPO}/releases`, {
            method: 'POST',
            body: JSON.stringify({ tag_name, name, body }),
          });
          console.log(`Created Release ${rel.tag_name}: ${rel.name}`);
          console.log(`URL: ${rel.html_url}`);
        }
        break;
      }

      case 'projects': {
        const sub = args[0] || 'list';
        if (sub === 'list') {
          const projects = await api(`/repos/${OWNER}/${REPO}/projects`);
          if (projects.length === 0) {
            console.log('No projects found.');
          } else {
            console.log(`Found ${projects.length} projects:`);
            for (const p of projects) {
              console.log(`  #${p.id} ${p.title}`);
            }
          }
        } else if (sub === 'create') {
          const title = args[1];
          const description = args.slice(2).join(' ') || '';
          if (!title) {
            console.error('Usage: bun tools/gitea.ts projects create <title> [description]');
            process.exit(1);
          }
          const project = await api(`/repos/${OWNER}/${REPO}/projects`, {
            method: 'POST',
            body: JSON.stringify({ title, description }),
          });
          console.log(`Created Project #${project.id}: ${project.title}`);
        }
        break;
      }

      default: {
        console.log(`Gitea Helper CLI for ${OWNER}/${REPO}`);
        console.log('Available commands:');
        console.log('  bun tools/gitea.ts whoami');
        console.log('  bun tools/gitea.ts repo');
        console.log('  bun tools/gitea.ts projects [list|create]');
        console.log('  bun tools/gitea.ts issues [list|create]');
        console.log('  bun tools/gitea.ts prs [list|create]');
        console.log('  bun tools/gitea.ts releases [list|create]');
        break;
      }
    }
  } catch (err: any) {
    console.error(err.message || err);
    process.exit(1);
  }
}

main();