import { BillingSummaryPanel } from '@/components/sponsors/BillingSummaryPanel';
import { SponsorDashboardHeader } from '@/components/sponsors/SponsorDashboardHeader';
import { PayoutItem, SponsorPayoutQueueTable } from '@/components/sponsors/SponsorPayoutQueueTable';
import { ViewData } from '@/lib/contracts/view-data/ViewData';
import { siteConfig } from '@/lib/siteConfig';
import type { InvoiceDTO, PaymentMethodDTO } from '@/lib/types/tbd/SponsorBillingDTO';
import { Box } from '@/ui/Box';
import { Button } from '@/ui/Button';
import { Card } from '@/ui/Card';
import { Container } from '@/ui/Container';
import { Heading } from '@/ui/Heading';
import { Icon } from '@/ui/Icon';
import { InfoBanner } from '@/ui/InfoBanner';
import { Stack } from '@/ui/Stack';
import { Text } from '@/ui/Text';
import {
    Building2,
    CreditCard,
    Download,
    ExternalLink,
    LucideIcon,
    Percent,
    Receipt
} from 'lucide-react';

export interface SponsorBillingViewData extends ViewData {
  stats: {
    totalSpent: number;
    pendingAmount: number;
    nextPaymentDate: string;
    nextPaymentAmount: number;
    averageMonthlySpend: number;
  };
  paymentMethods: PaymentMethodDTO[];
  invoices: InvoiceDTO[];
}

interface SponsorBillingTemplateProps {
  viewData: SponsorBillingViewData;
  billingStats: Array<{
    label: string;
    value: string;
    subValue?: string;
    icon: LucideIcon;
    variant: 'success' | 'warning' | 'info' | 'default';
  }>;
  transactions: Array<{
    id: string;
    date: string;
    amount: number | string;
    status: string;
    recipient?: string;
    description?: string;
    invoiceNumber?: string;
  }>;
  onSetDefaultPaymentMethod: (id: string) => void;
  onDownloadInvoice: (id: string) => void;
}

export function SponsorBillingTemplate({
  viewData,
  billingStats,
  transactions,
  onSetDefaultPaymentMethod,
  onDownloadInvoice
}: SponsorBillingTemplateProps) {
  // Map transactions to PayoutItems for the new table
  const payoutItems: PayoutItem[] = transactions.map(t => ({
    id: t.id,
    date: t.date,
    amount: typeof t.amount === 'number' ? t.amount.toFixed(2) : t.amount,
    status: t.status === 'paid' ? 'completed' : t.status === 'pending' ? 'pending' : 'failed',
    recipient: t.recipient || 'GridPilot Platform',
    description: t.description || `Invoice ${t.invoiceNumber}`
  }));

  return (
    <Container size="lg" spacing="md">
      <Stack gap={8}>
        <SponsorDashboardHeader 
          sponsorName="Sponsor" 
          onRefresh={() => console.log('Refresh')} 
        />

        <BillingSummaryPanel stats={billingStats} />

        <Box display="grid" gridCols={{ base: 1, lg: 12 }} gap={8}>
          <Box colSpan={{ base: 1, lg: 8 }}>
            <Stack gap={8}>
              {/* Billing History */}
              <Box>
                <Stack direction="row" align="center" justify="between" mb={4}>
                  <Heading level={3}>Billing History</Heading>
                  <Button variant="secondary" size="sm" icon={<Icon icon={Download} size={4} />} onClick={() => onDownloadInvoice('all')}>
                    Export All
                  </Button>
                </Stack>
                <Card p={0} overflow="hidden">
                  <SponsorPayoutQueueTable payouts={payoutItems} />
                </Card>
              </Box>

              {/* Platform Fees & VAT */}
              <Box display="grid" gridCols={{ base: 1, md: 2 }} gap={6}>
                <Card overflow="hidden">
                  <Box p={4} borderBottom borderColor="border-charcoal-outline" bg="bg-iron-gray/10">
                    <Stack direction="row" align="center" gap={2}>
                      <Icon icon={Percent} size={4} color="text-primary-blue" />
                      <Text size="xs" weight="bold" uppercase letterSpacing="wider" color="text-gray-400">
                        Platform Fee
                      </Text>
                    </Stack>
                  </Box>
                  <Box p={5}>
                    <Text size="3xl" weight="bold" color="text-white" block mb={2}>
                      {siteConfig.fees.platformFeePercent}%
                    </Text>
                    <Text size="sm" color="text-gray-400" block>
                      {siteConfig.fees.description}
                    </Text>
                  </Box>
                </Card>

                <Card overflow="hidden">
                  <Box p={4} borderBottom borderColor="border-charcoal-outline" bg="bg-iron-gray/10">
                    <Stack direction="row" align="center" gap={2}>
                      <Icon icon={Receipt} size={4} color="text-performance-green" />
                      <Text size="xs" weight="bold" uppercase letterSpacing="wider" color="text-gray-400">
                        VAT Information
                      </Text>
                    </Stack>
                  </Box>
                  <Box p={5}>
                    <Text size="sm" color="text-gray-400" block mb={4}>
                      {siteConfig.vat.notice}
                    </Text>
                    <Stack gap={2}>
                      <Box display="flex" justifyContent="between">
                        <Text size="sm" color="text-gray-500">Standard Rate</Text>
                        <Text size="sm" color="text-white" weight="medium">{siteConfig.vat.standardRate}%</Text>
                      </Box>
                      <Box display="flex" justifyContent="between">
                        <Text size="sm" color="text-gray-500">B2B Reverse Charge</Text>
                        <Text size="sm" color="text-performance-green" weight="medium">Available</Text>
                      </Box>
                    </Stack>
                  </Box>
                </Card>
              </Box>
            </Stack>
          </Box>

          <Box colSpan={{ base: 1, lg: 4 }}>
            <Stack gap={6}>
              {/* Payment Methods */}
              <Card>
                <Stack gap={4}>
                  <Heading level={3}>Payment Methods</Heading>
                  <Stack gap={3}>
                    {viewData.paymentMethods.map((method: PaymentMethodDTO) => (
                      <Box 
                        key={method.id} 
                        p={3} 
                        rounded="lg" 
                        border 
                        borderColor={method.isDefault ? 'border-primary-blue/50' : 'border-charcoal-outline/50'}
                        bg={method.isDefault ? 'bg-primary-blue/5' : 'bg-iron-gray/5'}
                      >
                        <Stack direction="row" align="center" justify="between">
                          <Stack direction="row" align="center" gap={3}>
                            <Icon icon={method.type === 'sepa' ? Building2 : CreditCard} size={5} color={method.isDefault ? 'text-primary-blue' : 'text-gray-400'} />
                            <Box>
                              <Text size="sm" weight="medium" color="text-white">
                                {method.brand || 'Bank Account'} •••• {method.last4}
                              </Text>
                              {method.isDefault && (
                                <Text size="xs" color="text-primary-blue" weight="medium" block>Default</Text>
                              )}
                            </Box>
                          </Stack>
                          {!method.isDefault && (
                            <Button variant="ghost" size="sm" onClick={() => onSetDefaultPaymentMethod(method.id)}>
                              Set Default
                            </Button>
                          )}
                        </Stack>
                      </Box>
                    ))}
                  </Stack>
                  <InfoBanner type="info">
                    <Text size="xs">All payments are securely processed by our payment provider.</Text>
                  </InfoBanner>
                </Stack>
              </Card>

              {/* Support */}
              <Card>
                <Stack gap={4}>
                  <Heading level={3}>Billing Support</Heading>
                  <Text size="sm" color="text-gray-400">
                    Need help with an invoice or have questions about your plan?
                  </Text>
                  <Button variant="secondary" fullWidth icon={<Icon icon={ExternalLink} size={4} />}>
                    Contact Support
                  </Button>
                </Stack>
              </Card>
            </Stack>
          </Box>
        </Box>
      </Stack>
    </Container>
  );
}