export const apiRequest = async (url: string, options: RequestInit = {}) => {
    const token = localStorage.getItem('token');

    const allowedRequests = [
        '/api/auth/login',
        '/api/auth/register',
    ]

    if (allowedRequests.includes(url)) {
        return publicRequest(url, options)
    }

    if (!token) {
        throw new Error('No authentication token found.' + url);
    }

    return privateRequest(url, token, options);
};

export const publicRequest = async (fullUrl: string, options: RequestInit = {}) => {
    console.log('→ Sending request', fullUrl, options.method);

    const url = `${process.env.NEXT_PUBLIC_API_URL}${fullUrl}`;

    const response = await fetch(url, {
        headers: {
            ...(options.headers || {}),
        },
        ...options,
    });


    if (!response.ok) {
        throw new Error(`HTTP Error: ${response.status} ${response.statusText}`);
    }

    return response.json();
}

export const privateRequest = async (fullUrl: string, token: string, options: RequestInit = {}) => {
    const headers = {
        ...(options.headers || {}),
        Authorization: `Bearer ${token}`,
    };

    const url = `${process.env.NEXT_PUBLIC_API_URL}${fullUrl}`;

    const response = await fetch(url, { headers, ...options });

    // Authentication failure - token invalid - redirect to login
    if (response.status === 401) {
        localStorage.removeItem('token');
        localStorage.removeItem('refreshToken');

        window.location.href = '/login';

        throw new Error('Unauthorized. Redirecting to login.');
    }

    if (!response.ok) {
        throw new Error(`HTTP Error: ${response.status} ${response.statusText}`);
    }

    return response.json();
}


// Add shorthand HTTP methods
apiRequest.get = (url: string, options: RequestInit = {}) => {
    return apiRequest(url, { ...options, method: 'GET' });
};

apiRequest.post = <TBody extends Record<string, unknown> | undefined>(
    url: string,
    body: TBody,
    options: RequestInit = {}
) => {
    return apiRequest(url, {
        ...options,
        method: 'POST',
        headers: {
            'Content-Type': 'application/json',
            ...(options.headers || {}),
        },
        body: body ? JSON.stringify(body) : undefined,
    });
};

apiRequest.put = <TBody extends Record<string, unknown> | undefined>(
    url: string,
    body: TBody,
    options: RequestInit = {}
) => {
    return apiRequest(url, {
        ...options,
        method: 'PUT',
        headers: {
            'Content-Type': 'application/json',
            ...(options.headers || {}),
        },
        body: body ? JSON.stringify(body) : undefined,
    });
};

apiRequest.delete = (url: string, options: RequestInit = {}) => {
    return apiRequest(url, { ...options, method: 'DELETE' });
};