const API_BASE_URL = import.meta.env.NSCT_API_BASE_URL || 'http://localhost:8080';

interface ApiConfig {
    apiKey?: string;
}

function headers(config?: ApiConfig): Record<string, string> {
    const h: Record<string, string> = {
        'Content-Type': 'application/json'
    };
    if (config?.apiKey) {
        h['X-API-Key'] = config.apiKey;
    }
    return h;
}

export async function apiPost<T>(
    path: string,
    body?: unknown,
    config?: ApiConfig
): Promise<T> {
    const res = await fetch(`${API_BASE_URL}${path}`, {
        method: 'POST',
        headers: headers(config),
        body: body ? JSON.stringify(body) : undefined
    });
    if (!res.ok) {
        throw new Error(`API Error ${res.status}: ${res.statusText}`);
    }
    return res.json();
}

export async function apiGet<T>(
    path: string,
    config?: ApiConfig
): Promise<T> {
    const res = await fetch(`${API_BASE_URL}${path}`, {
        headers: headers(config)
    });
    if (!res.ok) {
        throw new Error(`API Error ${res.status}: ${res.statusText}`);
    }
    return res.json();
}

export async function apiDelete<T>(
    path: string,
    config?: ApiConfig
): Promise<T> {
    const res = await fetch(`${API_BASE_URL}${path}`, {
        method: 'DELETE',
        headers: headers(config)
    });
    if (!res.ok) {
        throw new Error(`API Error ${res.status}: ${res.statusText}`);
    }
    return res.json();
}

export { API_BASE_URL };