type HttpMethod =
    | "GET"
    | 'get'
    | "POST"
    | 'post'
    | "PUT"
    | 'put'
    | "DELETE"
    | 'delete'
    | "PATCH"
    | 'patch'
    | "OPTIONS"
    | 'options'
    | "HEAD"
    | 'head'
    | "TRACE"
    | 'trace'
    | "CONNECT"
    | 'connect';
interface RequestOptions {
    baseUrl?: string;
    url: string;
    data?: Record<string, any>;
    method?: HttpMethod;
    header?: Record<string, string>;
    params?: Record<string, any>;
}
type RequestInterceptor = (config: RequestOptions) => RequestOptions;
type ResponseInterceptor = (response: any) => any;
interface Interceptors {
    request: (config: RequestOptions) => RequestOptions;
    response: (response: any) => any;
}
class uniFetch {
    baseUrl: string;
    defaultHeader: Record<string, string>;
    interceptors: { request: RequestInterceptor | null; response: ResponseInterceptor | null };
    constructor({ baseUrl = '', defaultHeader = {}, interceptors = { request: null, response: null } }: {
        baseUrl?: string;
        defaultHeader?: Record<string, string>;
        interceptors?: Interceptors;
    }) {
        this.baseUrl = baseUrl;
        this.defaultHeader = {
            "Content-Type": "application/json;charset=UTF-8",
            ...defaultHeader,
        };
        this.interceptors = interceptors;
    }

    setBaseUrl(baseUrl: string): void {
        this.baseUrl = baseUrl;
    }

    setDefaultHeader(header: Record<string, string>): void {
        this.defaultHeader = header;
    }

    request(options: RequestOptions): Promise<any> {
        options = options || {};
        options.baseUrl = options.baseUrl || this.baseUrl;
        options.url = options.baseUrl + options.url;
        options.data = options.data || {};
        options.method = options.method || "GET";
        options.header = options.header || this.defaultHeader;
        if (this.interceptors.request) {
            options = this.interceptors.request(options);
        }
        return new Promise((resolve, reject) => {
            uni.request({
                ...options,
                success: (res) => {
                    const response = this.handleResponse(res);
                    resolve(response);
                },
                fail: (err) => {
                    const error = this.handleError(err);
                    reject(error);
                },
            });
        });
    }

    private handleResponse(response: any): any {
        if (this.interceptors.response) {
            response = this.interceptors.response(response);
        }

        const statusCode = response.statusCode;
        if (statusCode === 200) {
            return response.data;
        } else {
            throw response;
        }
    }

    private handleError(error: any): any {
        throw error;
    }

    setRequestInterceptor(interceptor: RequestInterceptor): void {
        this.interceptors.request = interceptor;
    }

    setResponseInterceptor(interceptor: ResponseInterceptor): void {
        this.interceptors.response = interceptor;
    }

    get(options: RequestOptions): Promise<any> {
        options = options || {};
        options.method = "GET";
        return this.request(this.buildRequestOptions(options));
    }

    private buildRequestOptions(options: RequestOptions): RequestOptions {
        if (options.params) {
            const queryString = Object.keys(options.params)
                .map((key) => `${encodeURIComponent(key)}=${encodeURIComponent(options.params[key])}`)
                .join('&');
            options.url += `?${queryString}`;
        }
        delete options.params;
        return options;
    }
    post(options: RequestOptions): Promise<any> {
        options = options || {};
        options.method = "POST";
        return this.request(this.buildRequestOptions(options));
    }
    put(options: RequestOptions): Promise<any> {
        options = options || {};
        options.method = "PUT";
        return this.request(this.buildRequestOptions(options));
    }
    delete(options: RequestOptions): Promise<any> {
        options = options || {};
        options.method = "DELETE";
        return this.request(this.buildRequestOptions(options));
    }
}
export { uniFetch}