import type { Hono } from 'hono';
import { execFile } from 'node:child_process';
import { promisify } from 'node:util';
import { gitStatusSchema } from './schemas.ts';
import {
	validateAndGetGitRoot,
	getAheadBehind,
	getCurrentBranch,
} from './utils.ts';

const execFileAsync = promisify(execFile);

export function registerBranchRoute(app: Hono) {
	app.get('/v1/git/branch', async (c) => {
		try {
			const query = gitStatusSchema.parse({
				project: c.req.query('project'),
			});

			const requestedPath = query.project || process.cwd();

			const validation = await validateAndGetGitRoot(requestedPath);
			if ('error' in validation) {
				return c.json(
					{ status: 'error', error: validation.error, code: validation.code },
					400,
				);
			}

			const { gitRoot } = validation;

			const branch = await getCurrentBranch(gitRoot);

			const { ahead, behind } = await getAheadBehind(gitRoot);

			try {
				const { stdout: remotes } = await execFileAsync('git', ['remote'], {
					cwd: gitRoot,
				});
				const remoteList = remotes.trim().split('\n').filter(Boolean);

				return c.json({
					status: 'ok',
					data: {
						branch,
						ahead,
						behind,
						remotes: remoteList,
					},
				});
			} catch {
				return c.json({
					status: 'ok',
					data: {
						branch,
						ahead,
						behind,
						remotes: [],
					},
				});
			}
		} catch (error) {
			return c.json(
				{
					status: 'error',
					error:
						error instanceof Error
							? error.message
							: 'Failed to get branch info',
				},
				500,
			);
		}
	});
}