import { getToken, deleteToken } from '@/utils/token'
import feedback from '@/utils/feedback'


export const BASE_PATH = '/api/v2'

type Options = {
    url: string,
    method?: 'GET' | 'POST' | 'PUT' | 'DELETE',
    headers?: Record<string, string>,
    query?: Record<string, any>,
    params?: Record<string, any>,
    body?: string | FormData | Record<string, any>,
    showErrorMsg: bool
};

function get(options: Options) {
    options.method = 'GET';
    return ajax(options.url, options)
}

function post(options: Options) {
    options.method = 'POST';
    return ajax(options.url, options)
}

function put(options: Options) {
    options.method = 'PUT';
    return ajax(options.url, options)
}

function del(options: Options) {
    options.method = 'DELETE';
    return ajax(options.url, options)
}

let isRelogin = false;
function ajax(url: string, options: Options) {
    const headers: Record<string, string> = {
        "Authorization": getToken()
    };
    let body: string | FormData;
    if (options?.params && Object.keys(options.params).length > 0) {
        if (options.method === 'GET') {
            options.query = options.params;
        } else {
            body = JSON.stringify(options.params);
        }
    }
    if (options?.query) {
        // 解决 query 的值为 undefined 的情况
        if (options.query instanceof Object) {
            const params = {}
            for (let k of Object.keys(options.query)) {
                if (options.query[k] === undefined || options.query[k] === null) {
                    continue;
                }
                params[k] = options.query[k]
            }
            url += (url.indexOf('?') > -1 ? '&' : '?') + new URLSearchParams(params).toString();
        } else {
            url += (url.indexOf('?') > -1 ? '&' : '?') + new URLSearchParams(options.query).toString();
        }
    }
    if (options?.body) {
        if (options.body instanceof FormData) {
            body = options.body;
        } else {
            headers["Content-Type"] = "application/json"
            if (options.body instanceof String) {
                body = options.body;
            }
            if (options.body instanceof Array || (options.body instanceof Object && Object.keys(options.body).length > 0)) {
                body = JSON.stringify(options.body);
            }
        }
    }
    return new Promise((resolve, reject) => {
        fetch(`${BASE_PATH}${url}`, {
            method: options.method,
            body: body,
            headers: { ...headers, ...options.headers }
        }).then(response => {
            if (response.status === 413) {
                return;
            }
            return response.json();
        }).then(res => {
            if (res.code === 200 || res.httpStatusCode===0) {
                resolve(res.data)
            } else {
                let message = res.message;
                if (res.code === 401) {
                    deleteToken()
                    return
                }
                feedback.msgError(message)
                reject(res)
            }

        })
    })
}

const request = {
    get,
    post,
    put,
    del
}

export default request;