import _ from "lodash";
import {
    DSQLClientFetchHeader,
    DSQLFetchApiOptions,
} from "../../package-shared/types";

/**
 * # Fetch API
 */
export default async function fetchApi<
    T extends { [k: string]: any } = { [k: string]: any },
    R extends any = any
>(url: string, options?: DSQLFetchApiOptions<T>): Promise<R> {
    let data;

    let finalHeaders = {
        "Content-Type": "application/json",
    } as DSQLClientFetchHeader;

    if (options?.csrfKey && options.csrfValue) {
        finalHeaders[options.csrfKey] = options.csrfValue;
    }

    if (typeof options === "string") {
        try {
            let fetchData;

            switch (options) {
                case "post":
                    fetchData = await fetch(url, {
                        method: options,
                        headers: finalHeaders,
                    } as RequestInit);
                    data = fetchData.json();
                    break;

                default:
                    fetchData = await fetch(url);
                    data = fetchData.json();
                    break;
            }
        } catch (error: any) {
            console.log("FetchAPI error #1:", error.message);
            data = null;
        }
    } else if (typeof options === "object") {
        let fetchData;
        let fetchOptions: RequestInit = {};

        try {
            fetchOptions.method = options.method;

            if (options.method.match(/post|put|delete|patch/i)) {
                if (options.body && typeof options.body == "object") {
                    fetchOptions.body = JSON.stringify(options.body);
                }
            }

            fetchOptions.headers = _.merge(finalHeaders, options.headers || {});

            fetchOptions = _.merge(fetchOptions, options.fetchOptions);

            fetchData = await fetch(url, fetchOptions);
            data = fetchData.json();
        } catch (error: any) {
            console.log("FetchAPI error #2:", error.message);
            console.log("fetchData =>", fetchData);
            console.log("fetchOptions =>", fetchOptions);
            data = null;
        }
    } else {
        try {
            let fetchData = await fetch(url);
            data = await fetchData.json();
        } catch (error: any) {
            console.log("FetchAPI error #3:", error.message);
            data = null;
        }
    }

    return data;
}