<template>
	<view class=" page chat-box">
		<view class="header">
			<text class="title">{{title}}</text>
			<uni-icons class="btn-side" type="more-filled" size="30" @click="onShowMore()"></uni-icons>
		</view>
		<view class="chat-msg" @click="switchChatTabBox('none',true)">
			<scroll-view class="scroll-box" scroll-y="true" :scroll-into-view="'chat-item-'+scrollMsgIdx">
				<view v-for="(msgInfo,idx) in chat.messages" :key="idx">
					<chat-message-item :headImage="headImage(msgInfo)" :showName="showName(msgInfo)"
						@recall="onRecallMessage" @delete="onDeleteMessage" @download="onDownloadFile"
						:id="'chat-item-'+idx" :msgInfo="msgInfo">
					</chat-message-item>
				</view>
			</scroll-view>
		</view>
		<view class="send-bar">
			<view class="iconfont icon-voice-circle"></view>
			<view class="send-text">
				<textarea class="send-text-area" v-model="sendText" auto-height :show-confirm-bar="false"
					:adjust-position="false" @confirm="sendTextMessage()" @keyboardheightchange="onKeyboardheightchange"
					confirm-type="send" confirm-hold :hold-keyboard="true"></textarea>
			</view>
			<view class="iconfont icon-icon_emoji" @click="switchChatTabBox('emo',true)"></view>
			<view v-show="sendText==''" class="iconfont icon-add" @click="switchChatTabBox('tools',true)">
			</view>
			<button v-show="sendText!=''" class="btn-send" type="primary" @touchend.prevent="sendTextMessage()"
				size="mini">发送</button>
		</view>

		<view class="chat-tab-bar" v-show="chatTabBox!='none' ||showKeyBoard " :style="{height:`${keyboardHeight}px`}">
			<view v-if="chatTabBox == 'tools'" class="chat-tools">
				<view class="chat-tools-item">
					<image-upload sourceType="album" :onBefore="onUploadImageBefore" :onSuccess="onUploadImageSuccess"
						:onError="onUploadImageFail">
						<view class="tool-icon iconfont icon-picture"></view>
					</image-upload>
					<view class="tool-name">相册</view>
				</view>
				<view class="chat-tools-item">
					<image-upload sourceType="camera" :onBefore="onUploadImageBefore" :onSuccess="onUploadImageSuccess"
						:onError="onUploadImageFail">
						<view class="tool-icon iconfont icon-camera"></view>
					</image-upload>
					<view class="tool-name">拍摄</view>
				</view>
				<view class="chat-tools-item">
					<file-upload :onBefore="onUploadFileBefore" :onSuccess="onUploadFileSuccess"
						:onError="onUploadFileFail">
						<view class="tool-icon iconfont icon-folder"></view>
					</file-upload>
					<view class="tool-name">文件</view>
				</view>

				<view class="chat-tools-item">
					<view class="tool-icon iconfont icon-microphone"></view>
					<view class="tool-name">语音输入</view>
				</view>
				<view class="chat-tools-item">
					<view class="tool-icon iconfont icon-call"></view>
					<view class="tool-name">呼叫</view>
				</view>

			</view>

			<scroll-view v-if="chatTabBox==='emo'" class="chat-emotion" scroll-y="true">
				<view class="emotion-item-list">
					<image class="emotion-item" :src="$emo.textToPath(emoText)" v-for="(emoText, i) in $emo.emoTextList"
						:key="i" @click="selectEmoji(emoText)" mode="aspectFit" lazy-load="true"></image>
				</view>
			</scroll-view>
			<view v-if="showKeyBoard"></view>
		</view>

	</view>
</template>

<script>
	export default {
		data() {
			return {
				chat: {},
				friend: {},
				group: {},
				groupMembers: [],
				sendText: "",
				showVoice: false, // 是否显示语音录制弹窗
				scrollMsgIdx: 0, // 滚动条定位为到哪条消息
				chatTabBox: 'none',
				showKeyBoard: false,
				keyboardHeight: 322
			}
		},
		methods: {
			headImage(msgInfo) {
				if (this.chat.type == 'GROUP') {
					let member = this.groupMembers.find((m) => m.userId == msgInfo.sendId);
					return member ? member.headImage : "";
				} else {
					return msgInfo.selfSend ? this.mine.headImageThumb : this.chat.headImage
				}
			},
			showName(msgInfo) {
				if (this.chat.type == 'GROUP') {
					let member = this.groupMembers.find((m) => m.userId == msgInfo.sendId);
					return member ? member.aliasName : "";
				} else {
					return msgInfo.selfSend ? this.mine.nickName : this.chat.showName
				}

			},
			sendTextMessage() {
				if (!this.sendText.trim()) {
					return uni.showToast({
						title: "不能发送空白信息",
						icon: "none"
					});
				}
				let msgInfo = {
					content: this.sendText,
					type: 0
				}
				// 填充对方id
				this.fillTargetId(msgInfo, this.chat.targetId);
				this.sendText = "";
				this.$http({
					url: this.messageAction,
					method: 'POST',
					data: msgInfo
				}).then((id) => {
					msgInfo.id = id;
					msgInfo.sendTime = new Date().getTime();
					msgInfo.sendId = this.$store.state.userStore.userInfo.id;
					msgInfo.selfSend = true;
					this.$store.commit("insertMessage", msgInfo);
					this.sendText = "";
				}).finally(() => {
					// 滚动到底部
					this.scrollToBottom();
				});
			},
			fillTargetId(msgInfo, targetId) {
				if (this.chat.type == "GROUP") {
					msgInfo.groupId = targetId;
				} else {
					msgInfo.recvId = targetId;
				}
			},
			scrollToBottom() {
				let size = this.chat.messages.length;
				if (size > 0) {
					this.scrollToMsgIdx(size - 1);
				}
			},
			scrollToMsgIdx(idx) {
				// 如果scrollMsgIdx值没变化，滚动条不会移动
				if (idx == this.scrollMsgIdx && idx > 0) {
					this.$nextTick(() => {
						// 先滚动到上一条
						this.scrollMsgIdx = idx - 1;
						// 再滚动目标位置
						this.scrollToMsgIdx(idx);
					});
					return;
				}
				this.$nextTick(() => {
					this.scrollMsgIdx = idx;
				});

			},
			switchChatTabBox(chatTabBox, hideKeyBoard) {
				this.chatTabBox = chatTabBox;
				if (hideKeyBoard) {
					uni.hideKeyboard();
				}
			},
			selectEmoji(emoText) {
				this.sendText += `#${emoText};`;
			},
			onKeyboardheightchange(e) {
				;
				if (e.detail.height > 0) {
					this.showKeyBoard = true;
					this.switchChatTabBox('none', false)
					this.keyboardHeight = this.rpxTopx(e.detail.height);
				} else {
					this.showKeyBoard = false;
				}
			},
			onUploadImageBefore(file) {
				let data = {
					originUrl: file.path,
					thumbUrl: file.path
				}
				let msgInfo = {
					id: 0,
					fileId: file.uid,
					sendId: this.mine.id,
					content: JSON.stringify(data),
					sendTime: new Date().getTime(),
					selfSend: true,
					type: this.$enums.MESSAGE_TYPE.IMAGE,
					loadStatus: "loading"
				}
				// 填充对方id
				this.fillTargetId(msgInfo, this.chat.targetId);
				// 插入消息
				this.$store.commit("insertMessage", msgInfo);
				// 借助file对象保存
				file.msgInfo = msgInfo;
				// 滚到最低部
				this.scrollToBottom();
				return true;
			},
			onUploadImageSuccess(file, res) {
				let msgInfo = JSON.parse(JSON.stringify(file.msgInfo));
				msgInfo.content = JSON.stringify(res.data);
				this.$http({
					url: this.messageAction,
					method: 'POST',
					data: msgInfo
				}).then((id) => {
					msgInfo.loadStatus = 'ok';
					msgInfo.id = id;
					this.$store.commit("insertMessage", msgInfo);
				})
			},
			onUploadImageFail(file, err) {
				let msgInfo = JSON.parse(JSON.stringify(file.msgInfo));
				msgInfo.loadStatus = 'fail';
				this.$store.commit("insertMessage", msgInfo);
			},
			onUploadFileBefore(file) {
				let data = {
					name: file.name,
					size: file.size,
					url: file.path
				}
				let msgInfo = {
					id: 0,
					sendId: this.mine.id,
					content: JSON.stringify(data),
					sendTime: new Date().getTime(),
					selfSend: true,
					type: this.$enums.MESSAGE_TYPE.FILE,
					loadStatus: "loading"
				}
				// 填充对方id
				this.fillTargetId(msgInfo, this.chat.targetId);
				// 插入消息
				this.$store.commit("insertMessage", msgInfo);
				// 借助file对象保存
				file.msgInfo = msgInfo;
				// 滚到最低部
				this.scrollToBottom();
				return true;
			},
			onUploadFileSuccess(file, res) {
				let data = {
					name: file.name,
					size: file.size,
					url: res.data
				}
				let msgInfo = JSON.parse(JSON.stringify(file.msgInfo));
				msgInfo.content = JSON.stringify(data);
				this.$http({
					url: this.messageAction,
					method: 'POST',
					data: msgInfo
				}).then((id) => {
					msgInfo.loadStatus = 'ok';
					msgInfo.id = id;
					this.$store.commit("insertMessage", msgInfo);
				})
			},
			onUploadFileFail(file, res) {
				let msgInfo = JSON.parse(JSON.stringify(file.msgInfo));
				msgInfo.loadStatus = 'fail';
				this.$store.commit("insertMessage", msgInfo);
			},
			onDeleteMessage(msgInfo) {
				uni.showModal({
					title: '删除消息',
					content: '确认删除消息?',
					success: (res) => {
						if (!res.cancel) {
							this.$store.commit("deleteMessage", msgInfo);
							uni.showToast({
								title: "删除成功",
								icon: "none"
							})
						}
					}
				})
			},
			onRecallMessage(msgInfo) {
				uni.showModal({
					title: '撤回消息',
					content: '确认撤回消息?',
					success: (res) => {
						if (!res.cancel) {
							let url = `/message/${this.chat.type.toLowerCase()}/recall/${msgInfo.id}`
							this.$http({
								url: url,
								method: 'DELETE'
							}).then(() => {
								msgInfo = JSON.parse(JSON.stringify(msgInfo));
								msgInfo.type = this.$enums.MESSAGE_TYPE.RECALL;
								msgInfo.content = '你撤回了一条消息';
								this.$store.commit("insertMessage", msgInfo);
							})
						}
					}
				})
			},
			onDownloadFile(msgInfo) {
				let url = JSON.parse(msgInfo.content).url;
				uni.downloadFile({
					url: url,
					success(res) {
						if (res.statusCode === 200) {
							var filePath = encodeURI(res.tempFilePath);
							uni.openDocument({
								filePath: filePath,
								showMenu: true
							});
						}
					},
					fail(e){
						console.log(e);
						uni.showToast({
							title: "文件下载失败",
							icon: "none"
						})
					}
				});
			},
			onShowMore(){
				if (this.chat.type == "GROUP") {
					uni.navigateTo({
						url: "/pages/group/group-info?id="+this.group.id
					})
				}else{
					uni.navigateTo({
						url: "/pages/common/user-info?id="+this.friend.id
					})
				}
			},
			loadGroup(groupId) {
				this.$http({
					url: `/group/find/${groupId}`,
					method: 'GET'
				}).then((group) => {
					this.group = group;
					this.$store.commit("updateChatFromGroup", group);
					this.$store.commit("updateGroup", group);

				});

				this.$http({
					url: `/group/members/${groupId}`,
					method: 'get'
				}).then((groupMembers) => {
					this.groupMembers = groupMembers;
				});
			},
			loadFriend(friendId) {
				// 获取对方最新信息
				this.$http({
					url: `/user/find/${friendId}`,
					method: 'GET'
				}).then((friend) => {
					this.friend = friend;
					this.$store.commit("updateChatFromFriend", friend);
					this.$store.commit("updateFriend", friend);
				})
			},
			rpxTopx(rpx) {
				// px转换成rpx
				let info = uni.getSystemInfoSync()
				let px = info.windowWidth * rpx / 750;
				return Math.floor(rpx);
			}
		},
		computed: {
			mine() {
				return this.$store.state.userStore.userInfo;
			},
			title() {
				if (!this.chat) {
					return "";
				}
				let title = this.chat.showName;
				if (this.chat.type == "GROUP") {
					let size = this.groupMembers.filter(m => !m.quit).length;
					title += `(${size})`;
				}
				return title;
			},
			messageAction() {
				return `/message/${this.chat.type.toLowerCase()}/send`;
			},
			messageSize() {
				if (!this.chat || !this.chat.messages) {
					return 0;
				}
				return this.chat.messages.length;
			}
		},
		watch: {
			messageSize: function(newSize, oldSize) {
				// 接收到消息时滚动到底部
				if (newSize > oldSize) {
					this.scrollToBottom();
				}
			}
		},
		onLoad(options) {
			// 聊天数据
			this.chat = this.$store.state.chatStore.chats[options.chatIdx];
			// 激活当前会话
			this.$store.commit("activeChat", options.chatIdx);
			// 页面滚到底部
			this.scrollToBottom();
			// 加载好友或群聊信息
			if (this.chat.type == "GROUP") {
				this.loadGroup(this.chat.targetId);
			} else {
				this.loadFriend(this.chat.targetId);
			}
		},
		onUnload() {
			this.$store.commit("activeChat", -1);
		}
	}
</script>

<style lang="scss" scoped>
	.chat-box {
		position: relative;
		border: #dddddd solid 1px;
		display: flex;
		flex-direction: column;

		.header {
			display: flex;
			justify-content: center;
			align-items: center;
			height: 60rpx;
			padding: 5px;
			background-color: white;
			line-height: 50px;
			font-size: 40rpx;
			font-weight: 600;
			border: #dddddd solid 1px;


			.btn-side {
				position: absolute;
				right: 30rpx;
				line-height: 60rpx;
				font-size: 28rpx;
				cursor: pointer;
			}
		}


		.chat-msg {
			flex: 1;
			padding: 0;
			border: #dddddd solid 1px;
			overflow: hidden;
			position: relative;
			background-color: white;

			.scroll-box {
				height: 100%;
			}
		}

		.send-bar {
			display: flex;
			align-items: center;
			padding: 10rpx;
			margin-bottom: 10rpx;
			border: #dddddd solid 1px;
			background-color: white;

			.iconfont {
				font-size: 70rpx;
				margin: 3rpx;
			}

			.send-text {
				flex: 1;
				background-color: #f8f8f8 !important;
				overflow: auto;
				padding: 20rpx;
				background-color: #fff;
				border-radius: 20rpx;
				max-height: 300rpx;
				min-height: 85rpx;
				font-size: 30rpx;
				box-sizing: border-box;

				.send-text-area {
					width: 100%;
				}

			}

			.btn-send {
				margin: 5rpx;
			}
		}


		.chat-tab-bar {
			height: 500rpx;
			padding: 20rpx;
			background-color: whitesmoke;

			.chat-tools {

				display: flex;
				flex-wrap: wrap;
				justify-content: space-between;

				.chat-tools-item {
					width: 140rpx;
					padding: 15rpx;
					display: flex;
					flex-direction: column;
					align-items: center;

					.tool-icon {
						padding: 15rpx;
						font-size: 80rpx;
						background-color: white;
						border-radius: 20%;
					}

					.tool-name {
						height: 60rpx;
						line-height: 60rpx;
						font-size: 25rpx;

					}
				}
			}

			.chat-emotion {
				height: 100%;

				.emotion-item-list {
					display: flex;
					flex-wrap: wrap;

					.emotion-item {
						width: 60rpx;
						height: 60rpx;
						text-align: center;
						cursor: pointer;
						padding: 15rpx;
					}
				}
			}

		}
	}
</style>