import Config from './config.js'
import Util from './util.js'
import store from '@/store/index.js'
import Platform from './platform.js'

const { appType, appTypeName } = Platform.getPlatformInfo();

let _Lang = null;
function getLang() {
	if (!_Lang) {
		_Lang = require('./lang.js').default;
	}
	return _Lang;
}

const DEFAULT_TIMEOUT = 15000;
const DEFAULT_MAX_RETRIES = 2;
const RETRY_DELAY_BASE = 2000;

function _shouldRetry(errMsg) {
	if (!errMsg) return false;
	if (errMsg === 'request:fail url not in domain list') return false;
	if (errMsg === 'request:fail abort') return false;
	const retryableErrors = [
		'request:fail timeout',
		'request:fail connect',
		'request:fail network'
	];
	return retryableErrors.some(err => errMsg.startsWith(err));
}

function _classifyError(errMsg, statusCode) {
	if (!errMsg && !statusCode) return 'unknown';
	if (errMsg === 'request:fail abort') return 'aborted';
	if (errMsg && errMsg.indexOf('timeout') !== -1) return 'timeout';
	if (errMsg && (errMsg.indexOf('connect') !== -1 || errMsg.indexOf('network') !== -1)) return 'networkError';
	if (statusCode && statusCode >= 500) return 'serverError';
	if (errMsg && errMsg.indexOf('url not in domain list') !== -1) return 'domainNotInList';
	return 'unknown';
}

function _sleep(ms) {
	return new Promise(resolve => setTimeout(resolve, ms));
}

function _makeRequest(url, method, data, header, dataType, responseType, timeout) {
	return new Promise((resolve, reject) => {
		uni.request({
			url: url,
			method: method,
			data: data,
			header: header,
			dataType: dataType,
			responseType: responseType,
			timeout: timeout,
			success: (res) => {
				if (res.statusCode && [200, 500].indexOf(res.statusCode) == -1) {
					reject({ errMsg: `request:fail statusCode=${res.statusCode}`, statusCode: res.statusCode });
					return;
				}
				if (res.data.code == -3 && store.state.siteState > 0) {
					store.commit('setSiteState', -3);
					Util.redirectTo('/pages_tool/storeclose/storeclose', {}, 'reLaunch');
					return;
				}
				if (res.data.refreshtoken) {
					store.commit('setToken', res.data.refreshtoken);
				}
				if (res.data.code == -10009 || res.data.code == -10010) {
					store.commit('setToken', '');
					store.commit('setMemberInfo', '');
				}
				resolve(res.data);
			},
			fail: (res) => {
				reject(res);
			}
		});
	});
}

async function _requestWithRetry(params, url, method, data, header, dataType, responseType) {
	const timeout = params.timeout || DEFAULT_TIMEOUT;
	const maxRetries = params.noRetry ? 0 : (params.maxRetries || DEFAULT_MAX_RETRIES);
	let lastError = null;
	let lastStatusCode = null;

	for (let attempt = 0; attempt <= maxRetries; attempt++) {
		try {
			const result = await _makeRequest(url, method, data, header, dataType, responseType, timeout);
			return result;
		} catch (err) {
			lastError = err;
			lastStatusCode = err && err.statusCode;
			if (attempt >= maxRetries || !_shouldRetry(err.errMsg)) {
				break;
			}
			const delay = RETRY_DELAY_BASE * Math.pow(2, attempt);
			await _sleep(delay);
		}
	}

	if (params.silentError) {
		throw lastError;
	}

	const errorType = _classifyError(lastError && lastError.errMsg, lastStatusCode);
	const lang = getLang();
	if (errorType === 'domainNotInList') {
		uni.showToast({
			title: lang.lang('http.domainNotInList', { url: Config.baseUrl }),
			'icon': 'none',
			duration: 10000
		});
	} else {
		const i18nKey = 'http.' + errorType;
		uni.showToast({
			title: lang.lang(i18nKey),
			'icon': 'none',
			duration: 10000
		});
	}
	throw lastError;
}

export default {
	sendRequest(params) {
		if (!Config.baseUrl) {
			uni.showToast({
				title: getLang().lang('http.baseUrlNotConfigured'),
				'icon': 'none',
				duration: 10000
			});
			return;
		}

		const _isRemoteOnly = getLang().isRemoteOnly && getLang().isRemoteOnly();
		const _bootDone = getLang().isBootCompleted && getLang().isBootCompleted();
		if (_isRemoteOnly && !_bootDone) {
			let bootPromise = null;
			try {
				const app = getApp();
				if (app && app.$langReady) bootPromise = app.$langReady;
			} catch (e) {}
			if (!bootPromise) bootPromise = getLang().boot();

			if (params.async === false) {
				return bootPromise.then(() => this._sendRequestNow(params));
			} else {
				bootPromise.then(() => this._sendRequestNow(params));
				return;
			}
		}

		return this._sendRequestNow(params);
	},

	_sendRequestNow(params) {

		var method = params.data != undefined ? 'POST' : 'GET',
			url = (Config.baseUrl + params.url).replace(/(?<!:)\/+/g, '/'),
			data = {
				app_type: appType,
				app_type_name: appTypeName
			};

		data.token = store.state.token || '';
		data.uniacid = uni.getStorageSync('uniacid') || Config.uniacid;

		var default_store_info = store.state.defaultStoreInfo;
		if (default_store_info) {
			data.store_id = default_store_info.store_id;
		}

		var store_info = store.state.globalStoreInfo;

		if (store_info) data.store_id = store_info.store_id;

		if (params.data != undefined) Object.assign(data, params.data);

		const header = params.header || {
			'content-type': 'application/x-www-form-urlencoded;application/json'
		};
		const dataType = params.dataType || 'json';
		const responseType = params.responseType || 'text';

		if (params.async === false) {
			return _requestWithRetry(params, url, method, data, header, dataType, responseType)
				.then(res => {
					typeof params.complete == 'function' && params.complete(res);
					return res;
				})
				.catch(err => {
					typeof params.complete == 'function' && params.complete();
					throw err;
				});
		} else {
			_requestWithRetry(params, url, method, data, header, dataType, responseType)
				.then(res => {
					typeof params.success == 'function' && params.success(res);
					typeof params.complete == 'function' && params.complete(res);
				})
				.catch(err => {
					typeof params.fail == 'function' && params.fail(err);
					typeof params.complete == 'function' && params.complete();
				});
		}
	},
	uploadBase64(params) {
		uni.request({
			url: Config.baseUrl + '/api/upload/headimgBase64',
			method: 'POST',
			header: {
				'content-type': 'application/x-www-form-urlencoded;application/json'
			},
			data: {
				app_type: appType,
				app_type_name: appTypeName,
				images: params.base64
			},
			dataType: 'json',
			responseType: 'text',
			success: res => {
				typeof params.success == 'function' && params.success(res.data);
			},
			fail: () => {
				typeof params.fail == 'function' && params.fail(res);
			}
		});
	},
	pullImage(params) {
		uni.request({
			url: Config.baseUrl + '/api/upload/headimgPull',
			method: 'POST',
			header: {
				'content-type': 'application/x-www-form-urlencoded;application/json'
			},
			data: {
				app_type: appType,
				app_type_name: appTypeName,
				path: params.path
			},
			dataType: 'json',
			responseType: 'text',
			success: res => {
				typeof params.success == 'function' && params.success(res.data);
			},
			fail: () => {
				typeof params.fail == 'function' && params.fail(res);
			}
		});
	},
	upload(params) {
		uni.uploadFile({
			url: Config.baseUrl + params.url,
			filePath: params.filePath,
			name: params.name || 'file',
			fileType: params.fileType || 'image',
			formData: {
				app_type: appType,
				app_type_name: appTypeName,
			},
			header: {
				'content-type': 'application/x-www-form-urlencoded;application/json'
			},
			success: (res) => {
				typeof params.success == 'function' && params.success(JSON.parse(res.data));
			},
			fail: (res) => {
				typeof params.fail == 'function' && params.fail(res);
			}
		});
	}
}