export type HttpMethod = 'get' | 'post' | 'delete' | 'put'

export const httpConfig = {
    baseURL: ''
}
export type ResponseModel<T> = {
    code: number
    message: string
    data: T
    trace?: string
}

class Http {
    post<T>(url, data) {
        return this.request<T>(url, 'post', data)
    }

    request<T>(url: string, method: HttpMethod, data: any = null) {
        return new Promise<ResponseModel<T>>((resolve, reject) => {

            fetch(httpConfig.baseURL + url, {
                method,
                body: JSON.stringify(data),
                headers: {
                    'Content-Type': 'application/json;charset=utf-8'
                }
            })
                .then(res => res.json()) // 只要json的响应数据
                .then((res: ResponseModel<T>) => {
                    if (res.code !== 0) {
                        reject(Error(res.message))
                        return;
                    }
                    resolve(res.data)
                }).catch(reject)
        });
    }
}

const http = new Http();
export default http