<script setup lang="ts">
import { computed, onBeforeUnmount, onMounted, ref } from 'vue'

const brandName = '慧众易'
const messages = ['真容易', '算费真容易', '算费不熬夜', '算费不费力', '不熬夜，不费力']
const messageIndex = ref(0)
let rotationTimer: ReturnType<typeof setInterval> | null = null

const activeMessage = computed(() => {
  if (!messages.length) return ''
  return messages[((messageIndex.value % messages.length) + messages.length) % messages.length]
})

const stopRotation = () => {
  if (rotationTimer == null) return
  clearInterval(rotationTimer)
  rotationTimer = null
}

const startRotation = () => {
  stopRotation()
  if (messages.length <= 1) return
  rotationTimer = setInterval(() => {
    messageIndex.value = (messageIndex.value + 1) % messages.length
  }, 2400)
}

onMounted(() => {
  startRotation()
})

onBeforeUnmount(() => {
  stopRotation()
})
</script>

<template>
  <div class="hero-brand-ticker">
    <span class="hero-brand-ticker__brand">{{ brandName }}</span>
    <span class="hero-brand-ticker__divider" />
    <Transition name="hero-brand-message" mode="out-in">
      <span :key="messageIndex" class="hero-brand-ticker__message">{{ activeMessage }}</span>
    </Transition>
  </div>
</template>

<style scoped>
.hero-brand-ticker {
  display: inline-flex;
  max-width: 100%;
  align-items: center;
  gap: 12px;
  padding: 8px 16px;
  color: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 999px;
  backdrop-filter: blur(8px);
  background: rgba(255, 255, 255, 0.1);
}

.hero-brand-ticker__brand {
  flex-shrink: 0;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.28em;
  color: #fff;
}

.hero-brand-ticker__divider {
  width: 1px;
  height: 14px;
  flex-shrink: 0;
  background: rgba(255, 255, 255, 0.25);
}

.hero-brand-ticker__message {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.hero-brand-message-enter-active,
.hero-brand-message-leave-active {
  transition: opacity 0.22s ease, transform 0.22s ease;
}

.hero-brand-message-enter-from,
.hero-brand-message-leave-to {
  opacity: 0;
  transform: translateY(6px);
}
</style>
