import config, { getHeaders } from './config';
import LocalStorage from '@/LocalStorage';

interface Api {
    get: (url: string, data?: any) => Promise<any>,
    post: (url: string, data?: any) => Promise<any>,
    put: (url: string, data?: any) => Promise<any>,
    delete: (url: string, data?: any) => Promise<any>,
};

const apiGenerator = (): Api => {
    type Method = 'GET' | 'POST' | 'PUT' | 'DELETE';
    function request(
        method: Method,
        url: string,
        data?: any,
    ): Promise<any> {
        const options: {
            header: Object,
            method: Method,
            url: string,
            data?: any,
        } = {
            header: getHeaders(),
            method: method,
            url: config.baseURL + url,
        };
        if (Object.keys(data).length !== 0) {
            const params: { [key: string]: any } = {};
            for (const key in data) {
                if (data[key]) {
                    params[key] = data[key];
                }
            }
            options.data = params;
        };
        return new Promise((resolve, reject) => {
            uni.request({
                ...options,
                success: (response) => {
                    // HTTP状态码
                    const statusCode = response.statusCode;
                    if (statusCode === 200) {// 成功信息
                        const data = response.data as { code: number, data: any };
                        if (data.code === 200) {// 成功
                            resolve(data);
                        } else {// 失败
                            if (data.code === 401) {
                                LocalStorage.clear();
                                uni.reLaunch({
                                    url: '/pages/login/index/index',
                                    success: () => {
                                        uni.showToast({
                                            icon: 'none',
                                            mask: true,
                                            duration: 2000,
                                            title: '登录过期',
                                        });
                                    }
                                });
                                reject();
                            } else {
                                reject(data);
                            }
                        }
                    } else {// 错误信息
                        uni.showToast({
                            icon: 'none',
                            mask: true,
                            duration: 2000,
                            title: '服务异常',
                        });
                        reject();
                    }
                },
                fail: () => {
                    uni.showToast({
                        icon: 'none',
                        mask: true,
                        duration: 2000,
                        title: '请求失败',
                    });
                    reject();
                },
            });
        });
    }
    return {
        get: (url, data = {}) => {
            return request('GET', url, data);
        },
        post: (url, data = {}) => {
            return request('POST', url, data);
        },
        put: (url, data = {}) => {
            return request('PUT', url, data);
        },
        delete: (url, data = {}) => {
            return request('DELETE', url, data);
        },
    }
};

const api = apiGenerator();

export default api;