<template>
    <view class="chat">
        <!-- chat -->
        <list class="body" :show-scrollbar="false">
            <cell class="cell" v-for="(item, index) in messages" :key="index">
                <view class="time">
                    <text class="text">{{ customCN(item.sentTime) }}</text>
                </view>
                <view class="cell-item" :class="item.messageDirection == 1 ? 'right' : 'left'">
                    <u-avatar class="avatar" size="36" shape="square" @click="showUser(targetId, item.messageDirection)"
                        :src="userInfo.portraitUrl" />
                    <view class="msg">
                        <show-voice v-if="item.objectName === 'RC:HQVCMsg'" :guest="item.messageDirection == 1"
                            :msg="item.content" />
                        <show-image v-if="item.objectName === 'RC:ImgMsg'" :guest="item.messageDirection == 1"
                            :msg="item.content" />
                        <show-text v-if="item.objectName === 'RC:TxtMsg'" :guest="item.messageDirection == 1"
                            :msg="item.content" />
                        <view class="state" v-if="item.messageDirection == 1">
                            <text class="state-text">{{ item.sentStatus == 50 ? '已读': '未读'}}</text>
                        </view>
                    </view>
                </view>
            </cell>
            <cell class="cell-footer" ref="chatBottom"></cell>
        </list>
        <sent-message-bar :conversationType="conversationType" :targetId="targetId" @onSuccess="getNewMessage()" />
    </view>
</template>

<script>
    import {
        timeCustomCN
    } from '@/utils/filters.js'
    import * as RongIMLib from '@/uni_modules/RongCloud-IMWrapper/js_sdk/index'
    import im from '@/utils/im/index.js'
    import showVoice from '../components/showVoice'
    import showImage from '../components/showImage'
    import showText from '../components/showText'
    import sentMessageBar from '../components/sentMessageBar'

    const ChatList = uni.requireNativePlugin('dom')

    export default {
        components: {
            sentMessageBar,
            showVoice,
            showImage,
            showText
        },
        data() {
            return {
                targetId: '',
                messages: [],
                conversationType: 1,
                userInfo: {
                    name: '',
                    userId: '',
                    portraitUrl: ''
                }
            }
        },
        computed: {
            latestMessage() {
                if (this.messages.length > 1) {
                    return this.messages[this.messages.length - 1]
                } else {
                    return {
                        sentTime: 0
                    }
                }
            }
        },
        onLoad(e) {
            this.targetId = e.targetId
            this.userInfo = this.$store.getters.contactInfo(this.targetId)
            uni.setNavigationBarTitle({
                title: this.userInfo.name
            })
            // 获取消息列表
            this.getMessageList()
            // 监听消息已读状态
            uni.$on('onReadReceiptReceived', (data) => {
                if (data.targetId == this.targetId) {
                    this.messages = this.messages.map((item) => {
                        if (item.messageDirection == 1 && item.sentStatus == 30 && item.receivedTime <
                            data.messageTime + 1000) {
                            item.sentStatus = 50
                        }
                        return item
                    })
                }
            })
            // 监听收到新消息，判断是否是当前会话，更新会话内容
            uni.$on('onReceiveMessage', (msg) => {
                if (msg.targetId == this.targetId) {
                    this.getNewMessage()
                }
            })
        },
        onUnload() {
            uni.$off('onReadReceiptReceived')
        },
        methods: {
            customCN(val) {
                return timeCustomCN(val)
            },
            getNewMessage() {
                im.getMessageList(
                    this.conversationType,
                    this.targetId,
                    this.latestMessage.sentTime || 0,
                    1,
                    false,
                    (messages) => {
                        this.messages = this.messages.concat(messages)
                        this.scrollBottom()
                    })
            },
            // 获取消息列表
            getMessageList() {
                im.getMessageList(
                    this.conversationType,
                    this.targetId,
                    0,
                    100,
                    true,
                    (messages) => {
                        this.messages = messages.reverse()
                        this.scrollBottom()
                    })
            },
            // 展示好友信息,  type 1 是自己， 2 是对方
            showUser(targetId, type) {
                uni.navigateTo({
                    url: type === 1 ? '/pages/im/friends/mine?targetId=' + targetId :
                        '/pages/im/friends/info?targetId=' + targetId
                })
            },
            // 滚动到底部
            scrollBottom(type) {
                if (this.latestMessage) {
                    // 清理当前会话，未读消息数量
                    RongIMLib.clearMessagesUnreadStatus(this.conversationType, this.targetId, this.latestMessage
                        .sentTime)
                    // // 发送消息已读状态给对方
                    RongIMLib.sendReadReceiptMessage(this.conversationType, this.targetId, this.latestMessage.sentTime)
                    // 更新badge提醒数量
                    im.setNotifyBadge()
                }
                setTimeout(() => {
                    let el = this.$refs.chatBottom
                    ChatList.scrollToElement(el, {
                        offset: 0,
                        animated: false
                    })
                }, 50)
            }
        }
    }
</script>

<style scoped lang="scss">
    /* 窗口 */
    .chat {
        background: $window-color;
        flex: 1;

        .body {
            flex: 1;

            .cell {
                padding: 10rpx 30rpx;

                .time {
                    justify-content: center;
                    align-items: center;
                    padding-bottom: 20rpx;

                    .text {
                        background: #fff;
                        font-size: 24rpx;
                        color: #666;
                        line-height: 40rpx;
                        padding: 0 20rpx;
                        border-radius: 10rpx;
                    }
                }

                .cell-item {
                    width: 690rpx;
                    justify-content: flex-start;


                    &.left {
                        flex-direction: row;
                    }

                    &.right {
                        flex-direction: row-reverse;

                        .state {
                            flex-direction: row;
                            justify-content: flex-end;
                        }
                    }

                    .msg {
                        margin: 0 20rpx;

                        .state {
                            padding-top: 10rpx;

                            .state-text {
                                font-size: 24rpx;
                                color: #666;
                            }
                        }
                    }
                }

                .cell-footer {
                    height: 20rpx;
                }
            }
        }
    }
</style>
