// 跨域get请求 返回text
import UserScriptEngine from "../../enum/UserScriptEngine";

function COFetch(url, method = 'get', body = null) {
    const engine = getScriptEngine();
    switch (engine) {
        case UserScriptEngine.RAW: {
            return new Promise((_, reject) => {
                console.error(`[wh] 跨域请求错误：${UserScriptEngine.RAW}环境下无法进行跨域请求`);
                reject(`错误：${UserScriptEngine.RAW}环境下无法进行跨域请求`);
            });
        }
        case UserScriptEngine.PDA: {
            const {PDA_httpGet, PDA_httpPost} = window;
            return method === 'get' ?
                // get
                new Promise((resolve, reject) => {
                    if (typeof PDA_httpGet !== 'function') {
                        console.error('[wh] 跨域请求错误：PDA版本不支持');
                        reject('错误：PDA版本不支持');
                    }
                    PDA_httpGet(url)
                        .catch(e => {
                            console.error('[wh] 网络错误', e);
                            reject(`[wh] 网络错误 ${e}`);
                        })
                        .then(res => resolve(res.responseText));
                }) :
                // post
                new Promise((resolve, reject) => {
                    if (typeof PDA_httpPost !== 'function') {
                        console.error('[wh] 跨域请求错误：PDA版本不支持');
                        reject('错误：PDA版本不支持');
                    }
                    PDA_httpPost(url, {'content-type': 'application/json'}, body)
                        .catch(e => {
                            console.error('[wh] 网络错误', e);
                            reject(`[wh] 网络错误 ${e}`);
                        })
                        .then(res => resolve(res.responseText));
                });
        }
        case UserScriptEngine.GM: {
            return new Promise((resolve, reject) => {
                if (typeof GM_xmlhttpRequest !== 'function') {
                    console.error('[wh] 跨域请求错误：用户脚本扩展API错误');
                    reject('错误：用户脚本扩展API错误');
                }
                GM_xmlhttpRequest({
                    method: method,
                    url: url,
                    data: method === 'get' ? null : body,
                    headers: method === 'get' ? null : {'content-type': 'application/json'},
                    onload: res => resolve(res.response),
                    onerror: res => reject(`连接错误 ${JSON.stringify(res)}`),
                    ontimeout: res => reject(`连接超时 ${JSON.stringify(res)}`),
                });
            });
        }
    }
}

export default COFetch