import { computed, ref } from 'vue'
import {
  metricBlueprints,
  trendRanges,
  trendSeries,
  spendByCategory,
  exceptionMix,
  departmentRangeOptions,
  bottlenecks,
  budgetSummary
} from '../../data/metrics.js'
import TrendChart from '../../components/charts/TrendChart.vue'
import DonutChart from '../../components/charts/DonutChart.vue'
import BarChart from '../../components/charts/BarChart.vue'
import GaugeChart from '../../components/charts/GaugeChart.vue'
import PersonalWorkbench from '../../components/business/PersonalWorkbench.vue'

export default {
  name: 'OverviewView',
  components: { TrendChart, DonutChart, BarChart, GaugeChart, PersonalWorkbench },
  props: {
  filteredRequests: { type: Array, required: true }
},
  emits: ['ask'] ,
  setup(props, { emit }) {
    const activeTrendRange = ref(trendRanges[0])
    const activeDepartmentRange = ref(departmentRangeOptions[0])

    const demoTotals = {
      pendingCount: 128,
      pendingAmount: 361600,
      avgSla: 6.8,
      autoPassRate: 78,
      riskCount: 14,
      slaRate: 96
    }

    const demoDepartments = [
      { name: '销售部', amount: 182000, color: 'var(--theme-primary)' },
      { name: '研发中心', amount: 146000, color: 'var(--chart-blue)' },
      { name: '市场部', amount: 96000, color: 'var(--chart-amber)' },
      { name: '运营部', amount: 68600, color: 'var(--chart-purple)' },
      { name: '行政部', amount: 48300, color: 'var(--chart-blue)' }
    ]

    const formatCompact = (value) => {
      if (value >= 1_000_000) return `¥${(value / 1_000_000).toFixed(1)}M`
      if (value >= 1_000) return `¥${(value / 1_000).toFixed(1)}K`
      return `¥${value}`
    }

    const formatCurrency = (value) => formatCompact(value)

    const formatMetricValue = (metric, value) => {
      if (metric.key === 'pendingAmount') return formatCurrency(Math.round(value))
      if (metric.key === 'avgSla') return `${value.toFixed(1)} ${metric.unit}`
      if (metric.unit === '%') return `${Math.round(value)} ${metric.unit}`
      if (metric.unit) return `${Math.round(value)} ${metric.unit}`
      return `${Math.round(value)}`
    }

    const kpiMetrics = computed(() => metricBlueprints.map((metric, index) => {
      const rawValue = demoTotals[metric.key]
      const displayValue = formatMetricValue(metric, rawValue)

      return {
        ...metric,
        displayValue,
        changeText: metric.change,
        delay: index * 55
      }
    }))

    const activeTrend = computed(() => trendSeries[activeTrendRange.value])

    const spendTotal = computed(() => spendByCategory.reduce((sum, item) => sum + item.value, 0))
    const riskTotal = computed(() => exceptionMix.reduce((sum, item) => sum + item.value, 0))

    const spendLegend = computed(() => spendByCategory.map((item) => ({
      ...item,
      display: `${Math.round((item.value / spendTotal.value) * 100)}%`
    })))

    const riskLegend = computed(() => exceptionMix.map((item) => ({
      ...item,
      display: `${item.value} 单`
    })))

    const rankedDepartments = computed(() => {
      const rows = demoDepartments
      const max = Math.max(...rows.map((item) => item.amount), 1)

      return rows.slice(0, 6).map((item, index) => ({
        ...item,
        rank: index + 1,
        shortName: item.name,
        amountLabel: formatCurrency(item.amount),
        width: `${Math.max((item.amount / max) * 100, 18)}%`,
        color: item.color
      }))
    })

    return {
      emit,
      activeTrendRange,
      activeDepartmentRange,
      demoTotals,
      demoDepartments,
      formatCompact,
      formatCurrency,
      formatMetricValue,
      kpiMetrics,
      activeTrend,
      spendTotal,
      riskTotal,
      spendLegend,
      riskLegend,
      rankedDepartments,
      metricBlueprints,
      trendRanges,
      trendSeries,
      spendByCategory,
      exceptionMix,
      departmentRangeOptions,
      bottlenecks,
      budgetSummary
    }
  }
}