/**
 * 统一请求层
 * - 自动携带 token（header: token）
 * - 统一响应契约：code === 1 成功；其余为失败（0 通用 / 401 未登录 / 403 无权限 / 2001~2003 业务语义）
 * - 失败统一 toast，未登录自动清理并引导登录
 */
const BASE_URL = 'https://yjyf.gzyakj.com.cn/api';

const TOKEN_KEY = 'yjyf_token';
const USER_KEY = 'yjyf_user';

export function getToken() {
	try {
		return uni.getStorageSync(TOKEN_KEY) || '';
	} catch (e) {
		return '';
	}
}

export function setToken(token) {
	uni.setStorageSync(TOKEN_KEY, token || '');
}

export function getUser() {
	try {
		return uni.getStorageSync(USER_KEY) || null;
	} catch (e) {
		return null;
	}
}

export function setUser(user) {
	uni.setStorageSync(USER_KEY, user || null);
}

export function clearAuth() {
	uni.removeStorageSync(TOKEN_KEY);
	uni.removeStorageSync(USER_KEY);
}

export function isLogin() {
	return !!getToken();
}

export function toLogin() {
	clearAuth();
	uni.navigateTo({ url: '/pages/login/login' });
}

/**
 * @param {String} path    接口路径，如 /order/index
 * @param {Object} options { method, data, auth, silent }
 */
export function request(path, options) {
	const opts = options || {};
	const method = opts.method || 'GET';
	const data = opts.data || {};
	const silent = !!opts.silent;

	return new Promise((resolve, reject) => {
		const header = { 'content-type': 'application/x-www-form-urlencoded' };
		const token = getToken();
		if (token) {
			header.token = token;
		}

		uni.request({
			url: BASE_URL + path,
			method: method,
			data: data,
			header: header,
			timeout: 15000,
			success: (res) => {
				const body = res.data || {};
				if (body.code === 1) {
					resolve(body.data === undefined || body.data === null ? {} : body.data);
					return;
				}
				const msg = body.msg || ('请求失败(' + res.statusCode + ')');
				if (body.code === 401) {
					clearAuth();
					if (!silent) {
						uni.showToast({ title: '登录已失效，请重新登录', icon: 'none' });
						setTimeout(() => toLogin(), 800);
					}
				} else if (!silent) {
					uni.showToast({ title: msg, icon: 'none' });
				}
				reject(Object.assign(new Error(msg), { code: body.code, data: body.data }));
			},
			fail: () => {
				if (!silent) {
					uni.showToast({ title: '网络异常，请稍后重试', icon: 'none' });
				}
				reject(new Error('网络异常'));
			}
		});
	});
}

export function get(path, data, options) {
	return request(path, Object.assign({ method: 'GET', data: data }, options || {}));
}

export function post(path, data, options) {
	return request(path, Object.assign({ method: 'POST', data: data }, options || {}));
}