"use client"

import { useState, useEffect } from "react"
import { Button } from "@/components/ui/button"
import { Input } from "@/components/ui/input"
import { Label } from "@/components/ui/label"
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select"
import { Table, TableBody, TableCell, TableHead, TableHeader, TableRow } from "@/components/ui/table"
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card"
import { Alert, AlertDescription } from "@/components/ui/alert"
import { Download, Search, Loader2, DollarSign, TrendingUp, Calculator } from "lucide-react"

const API_BASE_URL = process.env.NEXT_PUBLIC_API_URL || "http://localhost:5000/api/v1"

function formatDateBr(dateStr:string) {
  const [year, month, day] = dateStr.split("-");
  return `${day}/${month}/${year}`;
}

export function formatDateTime(raw?: string): string {
  if (!raw || raw === "-") return "-"
  const iso = raw.replace(" ", "T")
  const date = new Date(iso)
  if (isNaN(date.getTime())) return "-"
  return (
    date.toLocaleDateString("pt-BR", {
      day: "2-digit",
      month: "2-digit",
      year: "numeric",
    }) +
    " " +
    date.toLocaleTimeString("pt-BR", {
      hour: "2-digit",
      minute: "2-digit",
      second: "2-digit",
      hour12: false,
    })
  )
}

interface ClientTranscriptionData {
  uniqueid: string
  src: string
  dst: string
  start_call: string
  total_billsec: number
  total_min: string
  client_total_cost: string
}

interface HitTranscriptionData {
  companyId: string // Empresa
  uniqueid: string // Identificador da chamada
  src: string // Origem
  dst: string // Destino
  total_billsec: number // Quantidade de segundos
  qtd_token_input: number // Quantidade de tokens(input)
  qtd_token_output: number // Quantidade de tokens(output)
  total_min: number,
  custo_hit: string // Custo HIT
  client_total_cost: string // Custo Cliente
  client_price: string // Preço Cliente por Minuto
  start_call: string // Inicio
  end_call: string // Fim
}

type TranscriptionData = ClientTranscriptionData | HitTranscriptionData

// Interface para informações de custo
interface CostInfo {
  company_id: string
  start_date: string
  end_date: string
  total_cost_hit: number
  total_client_cost: number
}

// Interface para cotação do dólar
interface ExchangeRateResponse {
  USDBRL: {
    code: string
    codein: string
    name: string
    high: string
    low: string
    varBid: string
    pctChange: string
    bid: string
    ask: string
    timestamp: string
    create_date: string
  }
}

interface PaginationInfo {
  total: number
  page: number
  page_size: number
  total_pages: number
}

interface ApiResponse {
  success: boolean
  data: {
    data: TranscriptionData[]
    pagination: PaginationInfo
    cost?: CostInfo
  }
}

export default function TranscriptionTable() {
  const [data, setData] = useState<TranscriptionData[]>([])
  const [costInfo, setCostInfo] = useState<CostInfo | null>(null)
  const [exchangeRate, setExchangeRate] = useState<number | null>(null)
  const [isLoading, setIsLoading] = useState(false)
  const [isExporting, setIsExporting] = useState(false)
  const [error, setError] = useState("")

  // Filtros
  const [companyId, setCompanyId] = useState("")
  const [startDate, setStartDate] = useState("")
  const [endDate, setEndDate] = useState("")
  const [who, setWho] = useState<"client" | "hit">("client")

  // Estados para paginação
  const [pagination, setPagination] = useState<PaginationInfo>({
    total: 0,
    page: 1,
    page_size: 20,
    total_pages: 0,
  })
  const [currentPage, setCurrentPage] = useState(1)
  const [pageSize, setPageSize] = useState(20)

  const getAuthHeaders = () => {
    const token = localStorage.getItem("access_token")
    return {
      Authorization: `Bearer ${token}`,
      "Content-Type": "application/json",
    }
  }

  // Função para buscar a cotação do dólar
  const fetchExchangeRate = async () => {
    try {
      const response = await fetch("https://economia.awesomeapi.com.br/json/last/USD-BRL")
      if (response.ok) {
        const data: ExchangeRateResponse = await response.json()
        const rate = Number.parseFloat(data.USDBRL.ask) // Usando o valor de venda (ask)
        setExchangeRate(rate)
        return rate
      }
    } catch (err) {
      console.log("Erro ao buscar cotação do dólar:", err)
      // Usar uma cotação padrão em caso de erro
      setExchangeRate(5.5)
      return 5.5
    }
    return null
  }

  const fetchData = async (page: number = currentPage) => {
    if (!companyId || !startDate || !endDate) {
      setError("Preencha todos os campos obrigatórios")
      return
    }

    setIsLoading(true)
    setError("")

    try {
      // Buscar cotação do dólar em paralelo
      const ratePromise = fetchExchangeRate()

      const params = new URLSearchParams({
        companyId,
        startDate,
        endDate,
        who,
        page: page.toString(),
        page_size: pageSize.toString(),
      })

      const response = await fetch(`${API_BASE_URL}/usage/data/trascription?${params}`, {
        headers: getAuthHeaders(),
      })

      if (response.ok) {
        const result: ApiResponse = await response.json()
        if (result.success && result.data) {
          setData(result.data.data || [])
          setPagination(result.data.pagination)
          setCostInfo(result.data.cost || null)
          setCurrentPage(result.data.pagination.page)
        } else {
          setData([])
          setCostInfo(null)
          setPagination({ total: 0, page: 1, page_size: 20, total_pages: 0 })
        }
      } else {
        const errorData = await response.json()
        setError(errorData.message || "Erro ao buscar dados")
      }

      // Aguardar a cotação do dólar
      await ratePromise
    } catch (err) {
      console.log("====> Erro de conexão com o servidor: ", err)
      setError("Erro de conexão com o servidor")
    } finally {
      setIsLoading(false)
    }
  }

  const exportToExcel = async () => {
    if (!companyId || !startDate || !endDate) {
      setError("Preencha todos os campos obrigatórios")
      return
    }

    setIsExporting(true)
    setError("")

    try {
      const params = new URLSearchParams({
        companyId,
        startDate,
        endDate,
        who,
      })

      const response = await fetch(`${API_BASE_URL}/usage/export/trascription?${params}`, {
        headers: getAuthHeaders(),
      })

      if (response.ok) {
        const blob = await response.blob()
        const url = window.URL.createObjectURL(blob)
        const a = document.createElement("a")
        a.href = url
        a.download = `transcription-report-${who}-${startDate}-${endDate}.xlsx`
        document.body.appendChild(a)
        a.click()
        window.URL.revokeObjectURL(url)
        document.body.removeChild(a)
      } else {
        const errorData = await response.json()
        setError(errorData.message || "Erro ao exportar dados")
      }
    } catch (err) {
      console.log("====> Erro de conexão com o servidor: ", err)
      setError("Erro de conexão com o servidor")
    } finally {
      setIsExporting(false)
    }
  }

  // Funções de navegação de páginas
  const goToPage = (page: number) => {
    if (page >= 1 && page <= pagination.total_pages) {
      setCurrentPage(page)
      fetchData(page)
    }
  }

  const goToFirstPage = () => goToPage(1)
  const goToPreviousPage = () => goToPage(currentPage - 1)
  const goToNextPage = () => goToPage(currentPage + 1)
  const goToLastPage = () => goToPage(pagination.total_pages)

  // Função para formatar valores monetários
  const formatCurrency = (value: number, currency = "USD"): string => {
    return new Intl.NumberFormat("pt-BR", {
      style: "currency",
      currency: currency,
      minimumFractionDigits: 2,
      maximumFractionDigits: 2,
    }).format(value)
  }

  // Função para converter USD para BRL
  const convertUsdToBrl = (usdValue: number): number => {
    if (!exchangeRate) return usdValue
    return usdValue * exchangeRate
  }

  // Buscar cotação do dólar quando o componente for montado
  useEffect(() => {
    fetchExchangeRate()
  }, [])

  return (
    <div className="space-y-6">
      {/* Card de Informações de Custo */}
      {costInfo && exchangeRate && (
        <div className="grid grid-cols-1 md:grid-cols-3 gap-4">
          <Card>
            <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
              <CardTitle className="text-sm font-medium">Custo Total HIT</CardTitle>
              <Calculator className="h-4 w-4 text-muted-foreground" />
            </CardHeader>
            <CardContent>
              <div className="text-2xl font-bold text-blue-600">
                {formatCurrency(convertUsdToBrl(costInfo.total_cost_hit), "BRL")}
              </div>
              <p className="text-xs text-muted-foreground">
                Empresa {costInfo.company_id} • {formatCurrency(costInfo.total_cost_hit, "USD")}
              </p>
            </CardContent>
          </Card>

          <Card>
            <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
              <CardTitle className="text-sm font-medium">Custo Total Cliente</CardTitle>
              <DollarSign className="h-4 w-4 text-muted-foreground" />
            </CardHeader>
            <CardContent>
              <div className="text-2xl font-bold text-green-600">
                {formatCurrency(costInfo.total_client_cost, "BRL")}
              </div>
              <p className="text-xs text-muted-foreground">
                  {formatDateBr(costInfo.start_date)} até {formatDateBr(costInfo.end_date)}
              </p>
            </CardContent>
          </Card>

          <Card>
            <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
              <CardTitle className="text-sm font-medium">Margem</CardTitle>
              <TrendingUp className="h-4 w-4 text-muted-foreground" />
            </CardHeader>
            <CardContent>
              <div className="text-2xl font-bold text-purple-600">
                {formatCurrency(costInfo.total_client_cost - convertUsdToBrl(costInfo.total_cost_hit), "BRL")}
              </div>
              <p className="text-xs text-muted-foreground">
                {(
                  ((costInfo.total_client_cost - convertUsdToBrl(costInfo.total_cost_hit)) /
                    costInfo.total_client_cost) *
                  100
                ).toFixed(1)}
                % de margem
              </p>
            </CardContent>
          </Card>
        </div>
      )}

      {/* Filtros */}
      <Card>
        <CardHeader>
          <CardTitle>Filtros de Consulta</CardTitle>
        </CardHeader>
        <CardContent>
          <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-6 gap-4">
            <div className="space-y-2">
              <Label htmlFor="companyId">ID da Empresa *</Label>
              <Input
                id="companyId"
                value={companyId}
                onChange={(e) => setCompanyId(e.target.value)}
                placeholder="123"
              />
            </div>

            <div className="space-y-2">
              <Label htmlFor="startDate">Data Inicial *</Label>
              <Input id="startDate" type="date" value={startDate} onChange={(e) => setStartDate(e.target.value)} />
            </div>

            <div className="space-y-2">
              <Label htmlFor="endDate">Data Final *</Label>
              <Input id="endDate" type="date" value={endDate} onChange={(e) => setEndDate(e.target.value)} />
            </div>

            <div className="space-y-2">
              <Label htmlFor="who">Tipo de Consulta *</Label>
              <Select value={who} onValueChange={(value: "client" | "hit") => setWho(value)}>
                <SelectTrigger>
                  <SelectValue />
                </SelectTrigger>
                <SelectContent>
                  <SelectItem value="client">Cliente</SelectItem>
                  <SelectItem value="hit">HIT</SelectItem>
                </SelectContent>
              </Select>
            </div>

            <div className="space-y-2">
              <Label htmlFor="pageSize">Registros por página</Label>
              <Select
                value={pageSize.toString()}
                onValueChange={(value: string) => {
                  setPageSize(Number(value))
                  setCurrentPage(1)
                }}
              >
                <SelectTrigger>
                  <SelectValue />
                </SelectTrigger>
                <SelectContent>
                  <SelectItem value="10">10</SelectItem>
                  <SelectItem value="20">20</SelectItem>
                  <SelectItem value="50">50</SelectItem>
                  <SelectItem value="100">100</SelectItem>
                </SelectContent>
              </Select>
            </div>

            <div className="space-y-2">
              <Label>&nbsp;</Label>
              <div className="flex gap-2">
                <Button onClick={() => fetchData(1)} disabled={isLoading} className="flex-1">
                  {isLoading ? <Loader2 className="mr-2 h-4 w-4 animate-spin" /> : <Search className="mr-2 h-4 w-4" />}
                  Buscar
                </Button>
                <Button onClick={exportToExcel} disabled={isExporting || data.length === 0} variant="outline">
                  {isExporting ? <Loader2 className="h-4 w-4 animate-spin" /> : <Download className="h-4 w-4" />}
                </Button>
              </div>
            </div>
          </div>
        </CardContent>
      </Card>

      {error && (
        <Alert variant="destructive">
          <AlertDescription>{error}</AlertDescription>
        </Alert>
      )}

      {/* Indicador de cotação do dólar */}
      {exchangeRate && (
        <div className="flex justify-end">
          <div className="text-xs text-gray-500 bg-gray-50 px-2 py-1 rounded">
            Cotação USD/BRL: R$ {exchangeRate.toFixed(4)}
          </div>
        </div>
      )}

      {/* Tabela de Dados */}
      <Card>
        <CardHeader>
          <CardTitle>
            Resultados da Consulta
            {pagination.total > 0 && (
              <span className="text-sm font-normal text-gray-500 ml-2">
                (Página {currentPage} de {pagination.total_pages} - {pagination.total} registros total)
              </span>
            )}
          </CardTitle>
        </CardHeader>
        <CardContent>
          {data.length > 0 ? (
            <div className="overflow-x-auto">
              <Table>
                <TableHeader>
                  <TableRow>
                    {who === "hit" ? (
                      <>
                        <TableHead>Empresa</TableHead>
                        <TableHead>Identificador da chamada</TableHead>
                        <TableHead>Origem</TableHead>
                        <TableHead>Destino</TableHead>
                        <TableHead>Segundos</TableHead>
                        <TableHead>Minutos</TableHead>
                        <TableHead>Custo Cliente (R$)</TableHead>
                        <TableHead>Preço Cliente p/ Minuto (R$)</TableHead>
                        <TableHead>Custo HIT ($)</TableHead>
                        <TableHead>Início</TableHead>
                        <TableHead>Fim</TableHead>
                        <TableHead>Tokens (Input)</TableHead>
                        <TableHead>Tokens (Output)</TableHead>
                      </>
                    ) : (
                      <>
                        <TableHead>ID Único</TableHead>
                        <TableHead>Origem</TableHead>
                        <TableHead>Destino</TableHead>
                        <TableHead>Início</TableHead>
                        <TableHead>Duração (s)</TableHead>
                        <TableHead>Duração (m)</TableHead>
                        <TableHead>Custo (R$)</TableHead>
                      </>
                    )}
                  </TableRow>
                </TableHeader>
                <TableBody>
                  {data.map((item, index) => (
                    <TableRow key={item.uniqueid || index}>
                      {who === "hit" ? (
                        <>
                          <TableCell>{(item as HitTranscriptionData).companyId || "-"}</TableCell>
                          <TableCell>{(item as HitTranscriptionData).uniqueid || "-"}</TableCell>
                          <TableCell>{(item as HitTranscriptionData).src || "-"}</TableCell>
                          <TableCell>{(item as HitTranscriptionData).dst || "-"}</TableCell>
                          <TableCell>{(item as HitTranscriptionData).total_billsec || "-"}</TableCell>
                           <TableCell>{(item as HitTranscriptionData).total_min || "-"}</TableCell>
                          <TableCell>
                            {(item as HitTranscriptionData).client_total_cost
                              ? `R$ ${(item as HitTranscriptionData).client_total_cost.slice(0, 4)}`
                              : "-"}
                          </TableCell>
                          <TableCell>
                            {(item as HitTranscriptionData).client_price
                              ? `R$ ${(item as HitTranscriptionData).client_price}`
                              : "-"}
                          </TableCell>
                          <TableCell>
                            {(item as HitTranscriptionData).custo_hit
                              ? `$ ${(item as HitTranscriptionData).custo_hit.slice(0, 4)}`
                              : "-"}
                          </TableCell>
                          <TableCell>{formatDateTime((item as HitTranscriptionData).start_call || "-")}</TableCell>
                          <TableCell>{formatDateTime((item as HitTranscriptionData).end_call || "-")}</TableCell>
                          <TableCell>{(item as HitTranscriptionData).qtd_token_input || "-"}</TableCell>
                          <TableCell>{(item as HitTranscriptionData).qtd_token_output || "-"}</TableCell>
                        </>
                      ) : (
                        <>
                          <TableCell>{(item as ClientTranscriptionData).uniqueid || "-"}</TableCell>
                          <TableCell>{(item as ClientTranscriptionData).src || "-"}</TableCell>
                          <TableCell>{(item as ClientTranscriptionData).dst || "-"}</TableCell>
                          <TableCell>{formatDateTime((item as ClientTranscriptionData).start_call || "-")}</TableCell>
                          <TableCell>{(item as ClientTranscriptionData).total_billsec || "-"}</TableCell>
                          <TableCell>{(item as ClientTranscriptionData).total_min || "-"}</TableCell>
                          <TableCell>
                            {(item as ClientTranscriptionData).client_total_cost
                              ? `R$ ${(item as ClientTranscriptionData).client_total_cost.slice(0, 4)}`
                              : "-"}
                          </TableCell>
                        </>
                      )}
                    </TableRow>
                  ))}
                </TableBody>
              </Table>
            </div>
          ) : (
            <div className="text-center py-8 text-gray-500">
              Nenhum dado encontrado. Use os filtros acima para buscar dados.
            </div>
          )}

          {/* Componente de Paginação */}
          {pagination.total > 0 && (
            <div className="flex items-center justify-between px-2 py-4">
              <div className="flex items-center space-x-2">
                <p className="text-sm text-gray-700">
                  Mostrando <span className="font-medium">{(currentPage - 1) * pagination.page_size + 1}</span> até{" "}
                  <span className="font-medium">{Math.min(currentPage * pagination.page_size, pagination.total)}</span>{" "}
                  de <span className="font-medium">{pagination.total}</span> resultados
                </p>
              </div>

              <div className="flex items-center space-x-2">
                <div className="flex items-center space-x-1">
                  <Button variant="outline" size="sm" onClick={goToFirstPage} disabled={currentPage === 1}>
                    Primeira
                  </Button>
                  <Button variant="outline" size="sm" onClick={goToPreviousPage} disabled={currentPage === 1}>
                    Anterior
                  </Button>

                  <div className="flex items-center space-x-1">
                    {/* Páginas numeradas */}
                    {Array.from({ length: Math.min(5, pagination.total_pages) }, (_, i) => {
                      let pageNum
                      if (pagination.total_pages <= 5) {
                        pageNum = i + 1
                      } else if (currentPage <= 3) {
                        pageNum = i + 1
                      } else if (currentPage >= pagination.total_pages - 2) {
                        pageNum = pagination.total_pages - 4 + i
                      } else {
                        pageNum = currentPage - 2 + i
                      }

                      return (
                        <Button
                          key={pageNum}
                          variant={currentPage === pageNum ? "default" : "outline"}
                          size="sm"
                          onClick={() => goToPage(pageNum)}
                          className="w-10"
                        >
                          {pageNum}
                        </Button>
                      )
                    })}
                  </div>

                  <Button
                    variant="outline"
                    size="sm"
                    onClick={goToNextPage}
                    disabled={currentPage === pagination.total_pages}
                  >
                    Próxima
                  </Button>
                  <Button
                    variant="outline"
                    size="sm"
                    onClick={goToLastPage}
                    disabled={currentPage === pagination.total_pages}
                  >
                    Última
                  </Button>
                </div>
              </div>
            </div>
          )}
        </CardContent>
      </Card>
    </div>
  )
}