<template>
	<view class="u-no-network" v-if="!isConnected" :style="{'z-index': uZIndex}" @touchmove.stop.prevent="">
		<view class="u-inner">
			<image class="u-error-icon" :src="image" mode="widthFix"></image>
			<view class="u-tips">
				{{tips}}
			</view>
			<!-- 只有APP平台，才能跳转设置页，因为需要调用plus环境 -->
			<!-- #ifdef APP-PLUS -->
			<view class="u-to-setting">
				请检查网络，或前往<text class="u-setting-btn" @tap="openSettings">设置</text>
			</view>
			<!-- #endif -->
			<view class="u-retry" :hover-stay-time="150" @tap="retry" hover-class="u-retry-hover">
				重试
			</view>
		</view>
	</view>
</template>

<script>
	/**
	 * noNetwork 无网络提示
	 * @description 该组件无需任何配置，引入即可，内部自动处理所有功能和事件。
	 * @tutorial https://www.uviewui.com/components/noNetwork.html
	 * @property {String} tips 没有网络时的提示语（默认哎呀，网络信号丢失）
	 * @property {String Number} zIndex 组件的z-index值（默认1080）
	 * @property {String} image 无网络的图片提示，可用的src地址或base64图片
	 * @event {Function} retry 用户点击页面的"重试"按钮时触发
	 * @example <u-no-network></u-no-network>
	 */
	export default {
		name: "u-no-network",
		props: {
			// 页面文字提示
			tips: {
				type: String,
				default: '哎呀，网络信号丢失'
			},
			// 一个z-index值，用于设置没有网络这个组件的层次，因为页面可能会有其他定位的元素层级过高，导致此组件被覆盖
			zIndex: {
				type: [Number, String],
				default: ''
			},
			// image 没有网络的图片提示
			image: {
				type: String,
				default: "data:image/png;base64,[encoded data, 15464 characters]"
			}
		},
		data() {
			return {
				isConnected: true, // 是否有网络连接
				networkType: "none", // 网络类型
			}
		},
		computed: {
			uZIndex() {
				return this.zIndex ? this.zIndex : this.$u.zIndex.noNetwork;
			}
		},
		watch:{
			isConnected(val){
					this.$emit('isConnected',val)
			}
		},
		mounted() {
			this.isIOS = (uni.getSystemInfoSync().platform === 'ios');
			uni.onNetworkStatusChange((res) => {
				this.isConnected = res.isConnected;
				this.networkType = res.networkType;
			});
			uni.getNetworkType({
				success: (res) => {
					this.networkType = res.networkType;
					if (res.networkType == 'none') {
						this.isConnected = false;
					} else {
						this.isConnected = true;
					}
				}
			});
		},
		methods: {
			retry() {
				// 重新检查网络
				uni.getNetworkType({
					success: (res) => {
						this.networkType = res.networkType;
						if (res.networkType == 'none') {
							uni.showToast({
								title: '无网络连接',
								icon: 'none',
								position: 'top'
							})
							this.isConnected = false;
						} else {
							uni.showToast({
								title: '网络已连接',
								icon: 'none',
								position: 'top'
							})
							this.isConnected = true;
						}
					}
				});
				this.$emit('retry');
			},
			async openSettings() {
				if (this.networkType == "none") {
					this.openSystemSettings();
					return;
				}
			},
			openAppSettings() {
				this.gotoAppSetting();
			},
			openSystemSettings() {
				// 以下方法来自5+范畴，如需深究，请自行查阅相关文档
				// https://ask.dcloud.net.cn/docs/
				if (this.isIOS) {
					this.gotoiOSSetting();
				} else {
					this.gotoAndroidSetting();
				}
			},
			network() {
				var result = null;
				var cellularData = plus.ios.newObject("CTCellularData");
				var state = cellularData.plusGetAttribute("restrictedState");
				if (state == 0) {
					result = null;
				} else if (state == 2) {
					result = 1;
				} else if (state == 1) {
					result = 2;
				}
				plus.ios.deleteObject(cellularData);
				return result;
			},
			gotoAppSetting() {
				if (this.isIOS) {
					var UIApplication = plus.ios.import("UIApplication");
					var application2 = UIApplication.sharedApplication();
					var NSURL2 = plus.ios.import("NSURL");
					var setting2 = NSURL2.URLWithString("app-settings:");
					application2.openURL(setting2);
					plus.ios.deleteObject(setting2);
					plus.ios.deleteObject(NSURL2);
					plus.ios.deleteObject(application2);
				} else {
					var Intent = plus.android.importClass("android.content.Intent");
					var Settings = plus.android.importClass("android.provider.Settings");
					var Uri = plus.android.importClass("android.net.Uri");
					var mainActivity = plus.android.runtimeMainActivity();
					var intent = new Intent();
					intent.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
					var uri = Uri.fromParts("package", mainActivity.getPackageName(), null);
					intent.setData(uri);
					mainActivity.startActivity(intent);
				}
			},
			gotoiOSSetting() {
				var UIApplication = plus.ios.import("UIApplication");
				var application2 = UIApplication.sharedApplication();
				var NSURL2 = plus.ios.import("NSURL");
				var setting2 = NSURL2.URLWithString("App-prefs:root=General");
				application2.openURL(setting2);
				plus.ios.deleteObject(setting2);
				plus.ios.deleteObject(NSURL2);
				plus.ios.deleteObject(application2);
			},
			gotoAndroidSetting() {
				var Intent = plus.android.importClass("android.content.Intent");
				var Settings = plus.android.importClass("android.provider.Settings");
				var mainActivity = plus.android.runtimeMainActivity();
				var intent = new Intent(Settings.ACTION_SETTINGS);
				mainActivity.startActivity(intent);
			}
		}
	}
</script>

<style lang="scss" scoped>
	@import "../../libs/css/style.components.scss";
	
	.u-no-network {
		background-color: #fff;
		position: fixed;
		top: 0;
		left: 0;
		right: 0;
		bottom: 0;
	}

	.u-inner {
		height: 100vh;
		display: flex;
		flex-direction: column;
		align-items: center;
		justify-content: center;
		margin-top: -15%;
	}

	.u-tips {
		color: $u-tips-color;
		font-size: 28rpx;
		padding: 30rpx 0;
	}

	.u-error-icon {
		width: 300rpx;
	}

	.u-to-setting {
		color: $u-light-color;
		font-size: 26rpx;
	}

	.u-setting-btn {
		font-size: 26rpx;
		color: $u-type-primary;
	}

	.u-retry {
		margin-top: 30rpx;
		border: 1px solid $u-tips-color;
		color: $u-tips-color;
		font-size: 28rpx;
		padding: 6rpx 30rpx;
		border-radius: 3px;
	}

	.u-retry-hover {
		color: #fff;
		background-color: $u-tips-color;
	}
</style>
