<template>
  <div class="relative">
    <input
      v-model="query"
      @input="onInput"
      @focus="showDropdown = true"
      class="input input-bordered w-full"
      placeholder="Enter bank name or BIC..."
      autocomplete="off"
    />
    
    <!-- Dropdown with bank suggestions -->
    <div 
      v-if="showDropdown && suggestions.length > 0" 
      class="absolute top-full left-0 right-0 z-50 bg-base-100 border border-base-300 rounded-box shadow-lg max-h-60 overflow-y-auto"
    >
      <div
        v-for="(suggestion, index) in suggestions"
        :key="index"
        @click="selectBank(suggestion)"
        class="p-3 cursor-pointer hover:bg-base-200 transition-colors border-b border-base-300 last:border-b-0"
      >
        <div class="font-medium text-base-content">{{ suggestion.value }}</div>
        <div class="text-sm text-base-content/80">
          BIC: {{ suggestion.data.bic }}
          <span v-if="suggestion.data.correspondent_account">
             • Corr. account: {{ suggestion.data.correspondent_account }}
          </span>
        </div>
        <div v-if="suggestion.data.address" class="text-xs text-base-content/60 mt-1">
          {{ suggestion.data.address.value }}
        </div>
      </div>
    </div>
    
    <!-- Loading indicator -->
    <div v-if="loading" class="absolute right-3 top-1/2 -translate-y-1/2">
      <span class="loading loading-spinner loading-xs text-primary"></span>
    </div>
  </div>
</template>

<script setup lang="ts">
interface BankData {
  bankName: string
  bik: string
  correspondentAccount: string
}

interface BankSuggestion {
  value: string
  data: {
    bic: string
    correspondent_account?: string
    address?: { value: string }
  }
}

interface Props {
  modelValue?: BankData
}

interface Emits {
  (e: 'update:modelValue', value: BankData): void
  (e: 'select', bank: BankSuggestion): void
}

const props = withDefaults(defineProps<Props>(), {
  modelValue: () => ({
    bankName: '',
    bik: '',
    correspondentAccount: ''
  })
})

const emit = defineEmits<Emits>()

const query = ref('')
const suggestions = ref<BankSuggestion[]>([])
const loading = ref(false)
const showDropdown = ref(false)

// Hide dropdown when clicking outside
onMounted(() => {
  document.addEventListener('click', (e: MouseEvent) => {
    if (!(e.target as HTMLElement)?.closest('.relative')) {
      showDropdown.value = false
    }
  })
})

const onInput = async () => {
  if (query.value.length < 2) {
    suggestions.value = []
    showDropdown.value = false
    return
  }
  
  loading.value = true
  try {
    const response = await fetch('https://suggestions.dadata.ru/suggestions/api/4_1/rs/suggest/bank', {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
        'Accept': 'application/json',
        'Authorization': 'Token 8de30547fe1e228dd5d7289439b71f5a97cf7357'
      },
      body: JSON.stringify({
        query: query.value,
        count: 10
      })
    })
    
    const data = await response.json()
    suggestions.value = data.suggestions || []
    showDropdown.value = true
    
  } catch (error) {
    console.error('DADATA Bank error:', error)
    suggestions.value = []
  } finally {
    loading.value = false
  }
}

const selectBank = (bank: BankSuggestion) => {
  query.value = bank.value
  showDropdown.value = false
  
  const bankData: BankData = {
    bankName: bank.value,
    bik: bank.data.bic,
    correspondentAccount: bank.data.correspondent_account || ''
  }
  
  emit('update:modelValue', bankData)
  emit('select', bank)
}
</script>
