<!-- 公告栏组件 -->
<template>
  <view
    v-if="show"
    class="uni-noticebar"
    :style="{ backgroundColor: backgroundColor }"
    @click="onClick"
  >
    <slot name="icon">
      <uni-icons
        v-if="showIcon === true || showIcon === 'true'"
        class="uni-noticebar-icon"
        type="sound"
        :color="color"
        size="22"
      />
    </slot>
    <view
      ref="textBox"
      class="uni-noticebar__content-wrapper"
      :class="{
        'uni-noticebar__content-wrapper--scrollable': scrollable,
        'uni-noticebar__content-wrapper--single': !scrollable && (single || moreText),
      }"
    >
      <view
        :id="elIdBox"
        class="uni-noticebar__content"
        :class="{
          'uni-noticebar__content--scrollable': scrollable,
          'uni-noticebar__content--single': !scrollable && (single || moreText),
        }"
      >
        <text
          :id="elId"
          ref="animationEle"
          class="uni-noticebar__content-text"
          :class="{
            'uni-noticebar__content-text--scrollable': scrollable,
            'uni-noticebar__content-text--single': !scrollable && (single || showGetMore),
          }"
          :style="{
            color: color,
            width: wrapWidth + 'px',
            animationDuration: animationDuration,
            '-webkit-animationDuration': animationDuration,
            animationPlayState: webviewHide ? 'paused' : animationPlayState,
            '-webkit-animationPlayState': webviewHide ? 'paused' : animationPlayState,
            animationDelay: animationDelay,
            '-webkit-animationDelay': animationDelay,
          }"
        >
          {{ text }}
        </text>
      </view>
    </view>
    <view
      v-if="showGetMore === true || showGetMore === 'true'"
      class="uni-noticebar__more uni-cursor-point"
      @click="clickMore"
    >
      <text
        v-if="moreText.length > 0"
        :style="{ color: moreColor }"
        class="uni-noticebar__more-text"
      >
        {{ moreText }}
      </text>
      <uni-icons v-else type="right" :color="moreColor" size="16" />
    </view>
    <view
      class="uni-noticebar-close uni-cursor-point"
      v-if="
        (showClose === true || showClose === 'true') &&
        (showGetMore === false || showGetMore === 'false')
      "
    >
      <view @click="close">
        <slot name="close">
          <uni-icons type="closeempty" :color="color" size="16" />
        </slot>
      </view>
    </view>
  </view>
</template>

<script>
  import sheep from '@/sheep';
  // #ifdef APP-NVUE
  const dom = weex.requireModule('dom');
  const animation = weex.requireModule('animation');
  // #endif

  /**
   * NoticeBar 自定义导航栏
   * @description 通告栏组件
   * @tutorial https://ext.dcloud.net.cn/plugin?id=30
   * @property {Number} speed 文字滚动的速度，默认100px/秒
   * @property {String} text 显示文字
   * @property {String} backgroundColor 背景颜色
   * @property {String} color 文字颜色
   * @property {String} moreColor 查看更多文字的颜色
   * @property {String} moreText 设置“查看更多”的文本
   * @property {Boolean} single = [true|false] 是否单行
   * @property {Boolean} scrollable = [true|false] 是否滚动，为true时，NoticeBar为单行
   * @property {Boolean} showIcon = [true|false] 是否显示左侧喇叭图标
   * @property {Boolean} showClose = [true|false] 是否显示左侧关闭按钮
   * @property {Boolean} showGetMore = [true|false] 是否显示右侧查看更多图标，为true时，NoticeBar为单行
   * @event {Function} click 点击 NoticeBar 触发事件
   * @event {Function} close 关闭 NoticeBar 触发事件
   * @event {Function} getmore 点击”查看更多“时触发事件
   */

  export default {
    name: 'UniNoticeBar',
    emits: ['click', 'getmore', 'close'],
    props: {
      text: {
        type: String,
        default: '',
      },
      moreText: {
        type: String,
        default: '',
      },
      backgroundColor: {
        type: String,
        default: '',
      },
      speed: {
        // 默认1s滚动100px
        type: Number,
        default: 100,
      },
      color: {
        type: String,
        default: 'var(--ui-BG-Main)',
      },
      moreColor: {
        type: String,
        default: '#FF9A43',
      },
      single: {
        // 是否单行
        type: [Boolean, String],
        default: false,
      },
      scrollable: {
        // 是否滚动，添加后控制单行效果取消
        type: [Boolean, String],
        default: false,
      },
      showIcon: {
        // 是否显示左侧icon
        type: [Boolean, String],
        default: false,
      },
      showGetMore: {
        // 是否显示右侧查看更多
        type: [Boolean, String],
        default: false,
      },
      showClose: {
        // 是否显示左侧关闭按钮
        type: [Boolean, String],
        default: false,
      },
    },
    data() {
      const elId = `Uni_${Math.ceil(Math.random() * 10e5).toString(36)}`;
      const elIdBox = `Uni_${Math.ceil(Math.random() * 10e5).toString(36)}`;
      return {
        textWidth: 0,
        boxWidth: 0,
        wrapWidth: '',
        webviewHide: false,
        // #ifdef APP-NVUE
        stopAnimation: false,
        // #endif
        elId: elId,
        elIdBox: elIdBox,
        show: true,
        animationDuration: 'none',
        animationPlayState: 'paused',
        animationDelay: '0s',
      };
    },
    mounted() {
      // #ifdef APP-PLUS
      var pages = getCurrentPages();
      var page = pages[pages.length - 1];
      var currentWebview = page.$getAppWebview();
      currentWebview.addEventListener('hide', () => {
        this.webviewHide = true;
      });
      currentWebview.addEventListener('show', () => {
        this.webviewHide = false;
      });
      // #endif
      this.$nextTick(() => {
        this.initSize();
      });
    },
    // #ifdef APP-NVUE
    beforeDestroy() {
      this.stopAnimation = true;
    },
    // #endif
    methods: {
      initSize() {
        if (this.scrollable) {
          // #ifndef APP-NVUE
          let query = [],
            boxWidth = 0,
            textWidth = 0;
          let textQuery = new Promise((resolve, reject) => {
            uni.createSelectorQuery()
              // #ifndef MP-ALIPAY
              .in(this)
              // #endif
              .select(`#${this.elId}`)
              .boundingClientRect()
              .exec((ret) => {
                this.textWidth = ret[0].width;
                resolve();
              });
          });
          let boxQuery = new Promise((resolve, reject) => {
            uni.createSelectorQuery()
              // #ifndef MP-ALIPAY
              .in(this)
              // #endif
              .select(`#${this.elIdBox}`)
              .boundingClientRect()
              .exec((ret) => {
                this.boxWidth = ret[0].width;
                resolve();
              });
          });
          query.push(textQuery);
          query.push(boxQuery);
          Promise.all(query).then(() => {
            this.animationDuration = `${this.textWidth / this.speed}s`;
            this.animationDelay = `-${this.boxWidth / this.speed}s`;
            setTimeout(() => {
              this.animationPlayState = 'running';
            }, 1000);
          });
          // #endif
          // #ifdef APP-NVUE
          dom.getComponentRect(this.$refs['animationEle'], (res) => {
            let winWidth = sheep.$platform.device.windowWidth;
            this.textWidth = res.size.width;
            animation.transition(
              this.$refs['animationEle'],
              {
                styles: {
                  transform: `translateX(-${winWidth}px)`,
                },
                duration: 0,
                timingFunction: 'linear',
                delay: 0,
              },
              () => {
                if (!this.stopAnimation) {
                  animation.transition(
                    this.$refs['animationEle'],
                    {
                      styles: {
                        transform: `translateX(-${this.textWidth}px)`,
                      },
                      timingFunction: 'linear',
                      duration: ((this.textWidth - winWidth) / this.speed) * 1000,
                      delay: 1000,
                    },
                    () => {
                      if (!this.stopAnimation) {
                        this.loopAnimation();
                      }
                    },
                  );
                }
              },
            );
          });
          // #endif
        }
        // #ifdef APP-NVUE
        if (!this.scrollable && (this.single || this.moreText)) {
          dom.getComponentRect(this.$refs['textBox'], (res) => {
            this.wrapWidth = res.size.width;
          });
        }
        // #endif
      },
      loopAnimation() {
        // #ifdef APP-NVUE
        animation.transition(
          this.$refs['animationEle'],
          {
            styles: {
              transform: `translateX(0px)`,
            },
            duration: 0,
          },
          () => {
            if (!this.stopAnimation) {
              animation.transition(
                this.$refs['animationEle'],
                {
                  styles: {
                    transform: `translateX(-${this.textWidth}px)`,
                  },
                  duration: (this.textWidth / this.speed) * 1000,
                  timingFunction: 'linear',
                  delay: 0,
                },
                () => {
                  if (!this.stopAnimation) {
                    this.loopAnimation();
                  }
                },
              );
            }
          },
        );
        // #endif
      },
      clickMore() {
        this.$emit('getmore');
      },
      close() {
        this.show = false;
        this.$emit('close');
      },
      onClick() {
        this.$emit('click');
      },
    },
  };
</script>

<style lang="scss" scoped>
  .uni-noticebar {
    /* #ifndef APP-NVUE */
    display: flex;
    width: 100%;
    box-sizing: border-box;
    /* #endif */
    flex-direction: row;
    align-items: center;
    padding: 10px 12px;
    // margin-bottom: 10px;
  }

  .uni-cursor-point {
    /* #ifdef H5 */
    cursor: pointer;
    /* #endif */
  }

  .uni-noticebar-close {
    margin-left: 8px;
    margin-right: 5px;
  }

  .uni-noticebar-icon {
    margin-right: 5px;
  }

  .uni-noticebar__content-wrapper {
    flex: 1;
    flex-direction: column;
    overflow: hidden;
  }

  .uni-noticebar__content-wrapper--single {
    /* #ifndef APP-NVUE */
    line-height: 18px;
    /* #endif */
  }

  .uni-noticebar__content-wrapper--single,
  .uni-noticebar__content-wrapper--scrollable {
    flex-direction: row;
  }

  /* #ifndef APP-NVUE */
  .uni-noticebar__content-wrapper--scrollable {
    position: relative;
    height: 18px;
  }

  /* #endif */

  .uni-noticebar__content--scrollable {
    /* #ifdef APP-NVUE */
    flex: 0;
    /* #endif */
    /* #ifndef APP-NVUE */
    flex: 1;
    display: block;
    overflow: hidden;
    /* #endif */
  }

  .uni-noticebar__content--single {
    /* #ifndef APP-NVUE */
    display: flex;
    flex: none;
    width: 100%;
    justify-content: center;
    /* #endif */
  }

  .uni-noticebar__content-text {
    font-size: 14px;
    line-height: 18px;
    /* #ifndef APP-NVUE */
    word-break: break-all;
    /* #endif */
  }

  .uni-noticebar__content-text--single {
    /* #ifdef APP-NVUE */
    lines: 1;
    /* #endif */
    /* #ifndef APP-NVUE */
    display: block;
    width: 100%;
    white-space: nowrap;
    /* #endif */
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .uni-noticebar__content-text--scrollable {
    /* #ifdef APP-NVUE */
    lines: 1;
    padding-left: 750rpx;
    /* #endif */
    /* #ifndef APP-NVUE */
    position: absolute;
    display: block;
    height: 18px;
    line-height: 18px;
    white-space: nowrap;
    padding-left: 100%;
    animation: notice 10s 0s linear infinite both;
    animation-play-state: paused;
    /* #endif */
  }

  .uni-noticebar__more {
    /* #ifndef APP-NVUE */
    display: inline-flex;
    /* #endif */
    flex-direction: row;
    flex-wrap: nowrap;
    align-items: center;
    padding-left: 5px;
  }

  .uni-noticebar__more-text {
    font-size: 14px;
  }

  @keyframes notice {
    100% {
      transform: translate3d(-100%, 0, 0);
    }
  }
</style>