"use client"

import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card"
import { Badge } from "@/components/ui/badge"
import { Progress } from "@/components/ui/progress"
import { TrendingUp, TrendingDown, DollarSign, AlertTriangle, Clock, CheckCircle } from "lucide-react"
import type { Client, Supplier } from "@/types/business"

interface CreditOverviewProps {
  clients: Client[]
  suppliers: Supplier[]
}

export function CreditOverview({ clients, suppliers }: CreditOverviewProps) {
  // Calculate receivables (money owed to us by clients)
  const totalReceivables = clients.reduce((sum, client) => sum + client.outstandingAmount, 0)
  const clientsWithCredit = clients.filter((client) => client.outstandingAmount > 0)
  const overLimitClients = clients.filter((client) => client.outstandingAmount > client.creditLimit)
  const totalCreditLimit = clients.reduce((sum, client) => sum + client.creditLimit, 0)
  const creditUtilization = totalCreditLimit > 0 ? (totalReceivables / totalCreditLimit) * 100 : 0

  // Calculate payables (money we owe to suppliers)
  const totalPayables = suppliers.reduce((sum, supplier) => sum + supplier.amountOwed, 0)
  const suppliersWithBalance = suppliers.filter((supplier) => supplier.amountOwed > 0)

  // Net credit position (positive means we're owed more than we owe)
  const netCreditPosition = totalReceivables - totalPayables

  // Aging analysis (simplified - in real app would use actual dates)
  const currentReceivables = totalReceivables * 0.6
  const thirtyDayReceivables = totalReceivables * 0.25
  const sixtyDayReceivables = totalReceivables * 0.1
  const ninetyPlusReceivables = totalReceivables * 0.05

  return (
    <div className="space-y-6">
      {/* Summary Cards */}
      <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-4">
        <Card>
          <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
            <CardTitle className="text-sm font-medium">Total Receivables</CardTitle>
            <TrendingUp className="h-4 w-4 text-green-600" />
          </CardHeader>
          <CardContent>
            <div className="text-2xl font-bold text-green-600">${totalReceivables.toLocaleString()}</div>
            <p className="text-xs text-muted-foreground">
              {clientsWithCredit.length} clients with outstanding balances
            </p>
          </CardContent>
        </Card>

        <Card>
          <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
            <CardTitle className="text-sm font-medium">Total Payables</CardTitle>
            <TrendingDown className="h-4 w-4 text-red-600" />
          </CardHeader>
          <CardContent>
            <div className="text-2xl font-bold text-red-600">${totalPayables.toLocaleString()}</div>
            <p className="text-xs text-muted-foreground">
              {suppliersWithBalance.length} suppliers with outstanding balances
            </p>
          </CardContent>
        </Card>

        <Card>
          <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
            <CardTitle className="text-sm font-medium">Net Position</CardTitle>
            <DollarSign className={`h-4 w-4 ${netCreditPosition >= 0 ? "text-green-600" : "text-red-600"}`} />
          </CardHeader>
          <CardContent>
            <div className={`text-2xl font-bold ${netCreditPosition >= 0 ? "text-green-600" : "text-red-600"}`}>
              ${Math.abs(netCreditPosition).toLocaleString()}
            </div>
            <p className="text-xs text-muted-foreground">
              {netCreditPosition >= 0 ? "Net receivable position" : "Net payable position"}
            </p>
          </CardContent>
        </Card>

        <Card>
          <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
            <CardTitle className="text-sm font-medium">Credit Utilization</CardTitle>
            <AlertTriangle className={`h-4 w-4 ${creditUtilization > 80 ? "text-red-600" : "text-yellow-600"}`} />
          </CardHeader>
          <CardContent>
            <div className="text-2xl font-bold">{creditUtilization.toFixed(1)}%</div>
            <Progress value={creditUtilization} className="mt-2" />
            <p className="text-xs text-muted-foreground mt-1">
              ${totalReceivables.toLocaleString()} / ${totalCreditLimit.toLocaleString()} limit
            </p>
          </CardContent>
        </Card>
      </div>

      {/* Alerts */}
      {(overLimitClients.length > 0 || creditUtilization > 90) && (
        <Card className="border-red-200 bg-red-50 dark:bg-red-900/20">
          <CardHeader>
            <CardTitle className="flex items-center gap-2 text-red-800 dark:text-red-200">
              <AlertTriangle className="h-5 w-5" />
              Credit Alerts
            </CardTitle>
          </CardHeader>
          <CardContent className="space-y-2">
            {overLimitClients.length > 0 && (
              <p className="text-sm text-red-700 dark:text-red-300">
                <strong>{overLimitClients.length}</strong> clients are over their credit limit
              </p>
            )}
            {creditUtilization > 90 && (
              <p className="text-sm text-red-700 dark:text-red-300">
                Overall credit utilization is critically high at {creditUtilization.toFixed(1)}%
              </p>
            )}
          </CardContent>
        </Card>
      )}

      {/* Aging Analysis */}
      <div className="grid grid-cols-1 lg:grid-cols-2 gap-6">
        <Card>
          <CardHeader>
            <CardTitle className="flex items-center gap-2">
              <Clock className="h-5 w-5" />
              Receivables Aging
            </CardTitle>
            <CardDescription>Breakdown of outstanding receivables by age</CardDescription>
          </CardHeader>
          <CardContent className="space-y-4">
            <div className="space-y-3">
              <div className="flex items-center justify-between p-3 border rounded-lg">
                <div className="flex items-center gap-3">
                  <CheckCircle className="h-4 w-4 text-green-600" />
                  <span className="font-medium">Current (0-30 days)</span>
                </div>
                <div className="text-right">
                  <p className="font-medium">${currentReceivables.toFixed(0)}</p>
                  <Badge variant="default" className="text-xs">
                    60%
                  </Badge>
                </div>
              </div>

              <div className="flex items-center justify-between p-3 border rounded-lg">
                <div className="flex items-center gap-3">
                  <Clock className="h-4 w-4 text-yellow-600" />
                  <span className="font-medium">31-60 days</span>
                </div>
                <div className="text-right">
                  <p className="font-medium">${thirtyDayReceivables.toFixed(0)}</p>
                  <Badge variant="secondary" className="text-xs">
                    25%
                  </Badge>
                </div>
              </div>

              <div className="flex items-center justify-between p-3 border rounded-lg">
                <div className="flex items-center gap-3">
                  <AlertTriangle className="h-4 w-4 text-orange-600" />
                  <span className="font-medium">61-90 days</span>
                </div>
                <div className="text-right">
                  <p className="font-medium">${sixtyDayReceivables.toFixed(0)}</p>
                  <Badge variant="secondary" className="text-xs">
                    10%
                  </Badge>
                </div>
              </div>

              <div className="flex items-center justify-between p-3 border rounded-lg">
                <div className="flex items-center gap-3">
                  <AlertTriangle className="h-4 w-4 text-red-600" />
                  <span className="font-medium">90+ days</span>
                </div>
                <div className="text-right">
                  <p className="font-medium text-red-600">${ninetyPlusReceivables.toFixed(0)}</p>
                  <Badge variant="destructive" className="text-xs">
                    5%
                  </Badge>
                </div>
              </div>
            </div>
          </CardContent>
        </Card>

        <Card>
          <CardHeader>
            <CardTitle className="flex items-center gap-2">
              <DollarSign className="h-5 w-5" />
              Cash Flow Impact
            </CardTitle>
            <CardDescription>Credit impact on cash flow</CardDescription>
          </CardHeader>
          <CardContent className="space-y-4">
            <div className="space-y-3">
              <div className="flex items-center justify-between p-3 bg-green-50 dark:bg-green-900/20 border border-green-200 dark:border-green-800 rounded-lg">
                <div>
                  <p className="font-medium text-green-800 dark:text-green-200">Expected Inflow</p>
                  <p className="text-sm text-green-600 dark:text-green-400">From client payments</p>
                </div>
                <p className="text-xl font-bold text-green-600">${totalReceivables.toLocaleString()}</p>
              </div>

              <div className="flex items-center justify-between p-3 bg-red-50 dark:bg-red-900/20 border border-red-200 dark:border-red-800 rounded-lg">
                <div>
                  <p className="font-medium text-red-800 dark:text-red-200">Expected Outflow</p>
                  <p className="text-sm text-red-600 dark:text-red-400">To supplier payments</p>
                </div>
                <p className="text-xl font-bold text-red-600">${totalPayables.toLocaleString()}</p>
              </div>

              <div className="flex items-center justify-between p-3 bg-blue-50 dark:bg-blue-900/20 border border-blue-200 dark:border-blue-800 rounded-lg">
                <div>
                  <p className="font-medium text-blue-800 dark:text-blue-200">Net Cash Impact</p>
                  <p className="text-sm text-blue-600 dark:text-blue-400">
                    {netCreditPosition >= 0 ? "Positive impact" : "Negative impact"}
                  </p>
                </div>
                <p className={`text-xl font-bold ${netCreditPosition >= 0 ? "text-green-600" : "text-red-600"}`}>
                  {netCreditPosition >= 0 ? "+" : "-"}${Math.abs(netCreditPosition).toLocaleString()}
                </p>
              </div>
            </div>
          </CardContent>
        </Card>
      </div>
    </div>
  )
}