import { computed, nextTick, ref, watch } from 'vue'

import { useSystemState } from '../../composables/useSystemState.js'
import { fetchOntologyParse } from '../../services/ontology.js'

export default {
  name: 'ChatView',
  props: {
    documents: { type: Array, required: true },
    docSearch: { type: String, default: '' },
    messages: { type: Array, required: true },
    uploadedFiles: { type: Array, required: true },
    activeCase: { type: Object, default: null },
    quickPrompts: { type: Array, required: true },
    draft: { type: String, default: '' },
    sending: { type: Boolean, default: false },
    messageList: { type: Object, default: null }
  },
  emits: ['send', 'upload', 'draft', 'approveCase', 'rejectCase', 'selectCase'],
  setup(props, { emit }) {
    const { currentUser } = useSystemState()
    const localMessageList = ref(null)
    const promptPage = ref(0)
    const semanticDraft = ref('查一下本周报销超标风险')
    const semanticLoading = ref(false)
    const semanticError = ref('')
    const semanticResult = ref(null)

    const sessions = [
      { title: '北京出差，酒店超标报销怎么处理？', time: '10:32', active: true },
      { title: '发票抬头不一致怎么办', time: '09:48' },
      { title: '借款冲销流程', time: '昨天' },
      { title: '预算占用失败处理', time: '昨天' },
      { title: '招待费报销范围', time: '05-11' },
      { title: '差旅住宿标准如何匹配城市级别？', time: '05-10' },
      { title: '电子发票验真失败如何处理？', time: '05-09' },
      { title: '跨部门项目费用怎么归集？', time: '05-08' },
      { title: '会议费和招待费如何区分？', time: '05-07' },
      { title: '超预算申请需要哪些审批节点？', time: '05-06' },
      { title: '海外差旅汇率按哪天计算？', time: '05-05' },
      { title: '员工退票手续费是否可报销？', time: '05-04' }
    ]

    const prompts = [
      { icon: 'mdi mdi-bed-outline', short: '差旅标准', text: '差旅报销特殊标准是什么？' },
      { icon: 'mdi mdi-receipt-text-outline', short: '发票规范', text: '发票丢失如何处理？' },
      { icon: 'mdi mdi-cash-refund', short: '借款冲销', text: '借款多久内需要冲销？' },
      { icon: 'mdi mdi-file-chart-outline', short: '预算冲突', text: '预算不足如何申请？' },
      { icon: 'mdi mdi-shield-check-outline', short: '审批要求', text: '酒店超标后如何申请例外报销？' },
      { icon: 'mdi mdi-office-building-marker', short: '住宿标准', text: '差旅住宿标准按什么规则执行？' },
      { icon: 'mdi mdi-file-question-outline', short: '材料补齐', text: '报销附件缺失怎么补交？' },
      { icon: 'mdi mdi-alert-circle-outline', short: '风险等级', text: '哪些情况会触发中风险？' }
    ]

    const visiblePrompts = computed(() => prompts.slice((promptPage.value % 2) * 4, (promptPage.value % 2) * 4 + 4))

    const hotQuestions = [
      '差旅报销标准是什么？',
      '酒店超标后如何申请例外报销？',
      '发票丢失如何处理？',
      '借款多久内需要冲销？',
      '预算超支如何申请？',
      '招待费报销需要哪些凭证？',
      '发票抬头不一致是否允许报销？',
      '报销附件缺失怎么补交？',
      '差旅住宿标准按什么规则执行？',
      '电子发票验真失败如何处理？'
    ]

    const similarQuestions = [
      { text: '酒店超标后如何申请例外报销？', score: '96%' },
      { text: '发票抬头不一致是否允许报销？', score: '92%' },
      { text: '差旅住宿标准按什么规则执行？', score: '89%' },
      { text: '预算不足时能否先提交报销？', score: '86%' },
      { text: '电子发票验真失败是否可以先报销？', score: '84%' },
      { text: '跨部门项目费用如何归集？', score: '81%' },
      { text: '招待费报销需要哪些凭证？', score: '78%' },
      { text: '借款冲销逾期会影响报销吗？', score: '76%' }
    ]

    const semanticExamples = [
      '查一下本周报销超标风险',
      '客户 A 这个月还有多少应收',
      '帮我直接付款给供应商B'
    ]

    const semanticConfidenceLabel = computed(() =>
      semanticResult.value ? `${Math.round((semanticResult.value.confidence || 0) * 100)}%` : '未解析'
    )
    const semanticEntitiesText = computed(() => {
      const items = semanticResult.value?.entities || []
      return items.length
        ? items.map((item) => `${item.type}:${item.normalized_value}`).join(' / ')
        : '未识别'
    })
    const semanticTimeRangeText = computed(() => {
      const value = semanticResult.value?.time_range
      if (!value?.start_date || !value?.end_date) {
        return '未识别'
      }
      return `${value.start_date} ~ ${value.end_date}${value.granularity ? ` · ${value.granularity}` : ''}`
    })
    const semanticMetricsText = computed(() => {
      const items = semanticResult.value?.metrics || []
      return items.length
        ? items
            .map((item) => {
              const suffix = item.top_n ? ` top_${item.top_n}` : ''
              return `${item.name}${suffix}`
            })
            .join(' / ')
        : '未识别'
    })
    const semanticConstraintsText = computed(() => {
      const items = semanticResult.value?.constraints || []
      return items.length
        ? items.map((item) => `${item.field}${item.operator}${item.value}`).join(' / ')
        : '未识别'
    })
    const semanticRiskFlagsText = computed(() => {
      const items = semanticResult.value?.risk_flags || []
      return items.length ? items.join(' / ') : '未识别'
    })
    const semanticClarificationText = computed(() => {
      if (!semanticResult.value) {
        return '未解析'
      }
      if (!semanticResult.value.clarification_required) {
        return '无需澄清'
      }
      return semanticResult.value.clarification_question || '需要补充更多上下文'
    })
    const semanticResultJson = computed(() =>
      semanticResult.value ? JSON.stringify(semanticResult.value, null, 2) : ''
    )

    function rotatePrompts() {
      promptPage.value += 1
    }

    function applyPrompt(text) {
      emit('draft', text)
      semanticDraft.value = text
    }

    function applySemanticExample(text) {
      semanticDraft.value = text
    }

    function useDraftAsSemanticInput() {
      semanticDraft.value = props.draft || semanticDraft.value
    }

    async function parseSemanticQuery() {
      const query = String(semanticDraft.value || '').trim()
      if (!query) {
        semanticError.value = '请输入要解析的问题。'
        semanticResult.value = null
        return
      }

      semanticLoading.value = true
      semanticError.value = ''

      try {
        semanticResult.value = await fetchOntologyParse({
          query,
          user_id: currentUser.value?.username || currentUser.value?.name || 'anonymous',
          context_json: {
            role_codes: currentUser.value?.roleCodes || [],
            is_admin: Boolean(currentUser.value?.isAdmin),
            name: currentUser.value?.name || '',
            role: currentUser.value?.role || ''
          }
        })
      } catch (error) {
        semanticResult.value = null
        semanticError.value = error.message || '语义解析失败，请稍后重试。'
      } finally {
        semanticLoading.value = false
      }
    }

    watch(
      () => props.messages.length,
      () => {
        nextTick(() => localMessageList.value?.scrollTo({ top: localMessageList.value.scrollHeight, behavior: 'smooth' }))
      }
    )

    return {
      emit,
      localMessageList,
      promptPage,
      sessions,
      prompts,
      visiblePrompts,
      hotQuestions,
      similarQuestions,
      rotatePrompts,
      applyPrompt,
      semanticDraft,
      semanticLoading,
      semanticError,
      semanticResult,
      semanticExamples,
      semanticConfidenceLabel,
      semanticEntitiesText,
      semanticTimeRangeText,
      semanticMetricsText,
      semanticConstraintsText,
      semanticRiskFlagsText,
      semanticClarificationText,
      semanticResultJson,
      applySemanticExample,
      useDraftAsSemanticInput,
      parseSemanticQuery
    }
  }
}