// webapp/lib/api.ts

export const API_URL = process.env.NEXT_PUBLIC_API_URL || 'http://127.0.0.1:8000';

type ApiRequestOptions = {
    method?: 'GET' | 'POST' | 'PUT' | 'DELETE';
    body?: any;
    token?: string | null;
    wantsJson?: boolean; // Add this to control response parsing
};

export const apiRequest = async (endpoint: string, options: ApiRequestOptions = {}) => {
    // Set wantsJson to true by default, false for specific cases like file streams
    const { method = 'GET', body = null, token = null, wantsJson = true } = options;

    const headers: HeadersInit = {
        'Accept': 'application/json',
    };
    
    // Only set Content-Type for requests with a body
    if (body) {
        headers['Content-Type'] = 'application/json';
    }

    if (token) {
        headers['Authorization'] = `Bearer ${token}`;
    }

    const config: RequestInit = {
        method,
        headers,
    };

    if (body) {
        config.body = JSON.stringify(body);
    }

    const response = await fetch(`${API_URL}${endpoint}`, config);

    if (!response.ok) {
        const errorData = await response.json().catch(() => ({ detail: 'An unknown error occurred' }));
        throw new Error(errorData.detail || `HTTP error! status: ${response.status}`);
    }

    if (wantsJson) {
        const contentType = response.headers.get("content-type");
        if (contentType?.includes("application/json")) {
            return response.json();
        }
    }
    
    // For non-JSON requests, return the raw response object
    return response;
};