'use client'

import { useMemo, useState, useEffect } from 'react'
import { useMessages } from 'next-intl'
import { PDFViewer } from '@react-pdf/renderer'
import '@/features/vehicles/Components/invoice-pdf/fonts.client'
import { InvoicePDF } from '@/features/vehicles/Components/InvoicePDF'
import { QuotePDF } from '@/features/quotes/Components/QuotePDF'
import type { InvoiceLayoutPreviewProps } from './InvoiceLayoutPreview'
import { useServiceType } from '@/components/service-type-context'

// ---------------------------------------------------------------------------
// Dummy data matching InvoiceData type exactly
// ---------------------------------------------------------------------------

function buildDummyCustomFields(customFields?: InvoiceLayoutPreviewProps['customFields']) {
  if (!customFields) return []
  return customFields
    .filter((f) => f.isActive && f.entityType === 'service_record')
    .map((f) => ({
      fieldId: f.id,
      label: f.label,
      value:
        f.fieldType === 'checkbox'
          ? 'true'
          : f.fieldType === 'number'
            ? '42'
            : f.fieldType === 'date'
              ? '2026-03-10'
              : 'Sample value',
      fieldType: f.fieldType,
    }))
}

const DUMMY_INVOICE_DATA = {
  id: 'preview-dummy-id-00000001',
  title: 'Brake Service & Oil Change',
  description: null,
  type: 'Maintenance',
  serviceDate: new Date('2026-03-10'),
  startDateTime: new Date('2026-03-10'),
  shopName: 'Your Workshop',
  techName: 'Mike Johnson',
  mileage: 45230,
  diagnosticNotes: null,
  findings: [
    {
      description: 'Rear brake pads worn to 15%',
      severity: 'needs_work',
      notes: 'Recommend replacement within 5,000 miles',
    },
    { description: 'Minor oil leak at valve cover gasket', severity: 'monitor', notes: null },
  ],
  invoiceNotes:
    '<p>Front brake pads replaced. Oil and filter changed with synthetic 5W-30. Next service recommended at 50,000 miles.</p>',
  subtotal: 314.5,
  taxRate: 8,
  taxAmount: 25.16,
  totalAmount: 339.66,
  cost: 339.66,
  invoiceNumber: 'INV-2026-1001',
  discountType: null,
  discountValue: 0,
  discountAmount: 0,
  partItems: [
    {
      partNumber: 'BP-001',
      name: 'Brake Pads (Front)',
      quantity: 2,
      unitPrice: 45.0,
      total: 90.0,
    },
    {
      partNumber: 'OF-042',
      name: 'Oil Filter',
      quantity: 1,
      unitPrice: 12.0,
      total: 12.0,
    },
    {
      partNumber: 'SO-530',
      name: 'Synthetic Oil 5W-30',
      quantity: 5,
      unit: 'l',
      unitPrice: 8.5,
      total: 42.5,
    },
  ],
  laborItems: [
    {
      description: 'Brake Replacement',
      hours: 1.5,
      rate: 85.0,
      total: 127.5,
    },
    { description: 'Oil Change', hours: 0.5, rate: 85.0, total: 42.5 },
  ],
  vehicle: {
    make: 'Toyota',
    model: 'Camry',
    year: 2022,
    vin: '1HGBH41JXMN109186',
    licensePlate: 'ABC-1234',
    mileage: 45230,
    customer: {
      name: 'John Smith',
      email: 'john@example.com',
      phone: '(555) 123-4567',
      address: '123 Main Street, Springfield',
      company: 'Smith Auto Group',
      taxId: 'GB123456789',
    },
  },
}

const DUMMY_QUOTE_DATA = {
  quoteNumber: 'QT-2026-1001',
  title: 'Brake Service & Oil Change',
  description: null,
  validUntil: new Date('2026-04-10'),
  createdAt: new Date('2026-03-10'),
  subtotal: 314.5,
  taxRate: 8,
  taxAmount: 25.16,
  discountType: null,
  discountValue: 0,
  discountAmount: 0,
  totalAmount: 339.66,
  notes:
    '<p>Front brake pads replacement recommended. Oil and filter change with synthetic 5W-30.</p>',
  partItems: [
    {
      partNumber: 'BP-001',
      name: 'Brake Pads (Front)',
      quantity: 2,
      unitPrice: 45.0,
      total: 90.0,
    },
    {
      partNumber: 'OF-042',
      name: 'Oil Filter',
      quantity: 1,
      unitPrice: 12.0,
      total: 12.0,
    },
    {
      partNumber: 'SO-530',
      name: 'Synthetic Oil 5W-30',
      quantity: 5,
      unit: 'l',
      unitPrice: 8.5,
      total: 42.5,
    },
  ],
  laborItems: [
    {
      description: 'Brake Replacement',
      hours: 1.5,
      rate: 85.0,
      total: 127.5,
    },
    { description: 'Oil Change', hours: 0.5, rate: 85.0, total: 42.5 },
  ],
  customer: {
    name: 'John Smith',
    email: 'john@example.com',
    phone: '(555) 123-4567',
    address: '123 Main Street, Springfield',
    company: 'Smith Auto Group',
    taxId: 'GB123456789',
  },
  vehicle: {
    make: 'Toyota',
    model: 'Camry',
    year: 2022,
    vin: '1HGBH41JXMN109186',
    licensePlate: 'ABC-1234',
  },
}

const DUMMY_WORKSHOP = {
  name: 'Your Workshop',
  address: '123 Main Street, Springfield',
  phone: '(555) 123-4567',
  email: 'shop@example.com',
}

const DUMMY_INVOICE_SETTINGS = {
  bankAccount: '1234 5678 9012 3456',
  orgNumber: '912 345 678',
  paymentTerms: 'Net 14',
  footerNote: '',
  showBankAccount: true,
  showOrgNumber: true,
  dueDays: 14,
  currencyCode: 'USD',
  currencyFormat: 'symbol' as const,
  unitSystem: 'imperial',
}

// ---------------------------------------------------------------------------
// Renderer (loaded only client-side via dynamic import)
// ---------------------------------------------------------------------------

export function InvoiceLayoutPreviewRenderer({
  config,
  documentType,
  customFields,
  template,
  logoUrl,
}: InvoiceLayoutPreviewProps) {
  const messages = useMessages()
  const serviceType = useServiceType()

  const labels = useMemo(() => {
    const pdf = (messages?.pdf ?? {}) as Record<string, Record<string, string>>
    const namespace = documentType === 'quote' ? 'quote' : 'invoice'
    const baseLabels = {
      ...(pdf[namespace] ?? {}),
      ...(pdf.common ?? {}),
    }
    // Override labels for marine service type
    if (serviceType === 'marine') {
      const ns = pdf[namespace] ?? {}
      if (ns.mileageMarine) baseLabels.mileage = ns.mileageMarine
      if (ns.vinMarine) baseLabels.vin = ns.vinMarine
      if (ns.plateMarine) baseLabels.plate = ns.plateMarine
      if (ns.vehicleMarine) baseLabels.vehicle = ns.vehicleMarine
      baseLabels.km = 'hrs'
      baseLabels.mi = 'hrs'
    }
    return baseLabels
  }, [messages, documentType, serviceType])

  const dummyCf = useMemo(() => buildDummyCustomFields(customFields), [customFields])

  // Stable key to force PDFViewer remount when layout changes
  const configKey = useMemo(
    () =>
      config.sections.map((s) => `${s.id}:${s.order}:${s.visible}:${s.column ?? 'f'}`).join('|'),
    [config]
  )

  const templateConfig = useMemo(
    () => ({
      primaryColor: template.primaryColor,
      fontFamily: template.fontFamily,
      headerStyle: template.headerStyle,
      logoSize: template.logoSize,
      showLogo: true,
      showCompanyName: true,
      layoutConfig: config,
    }),
    [template, config]
  )

  const invoiceData = useMemo(() => ({ ...DUMMY_INVOICE_DATA, customFields: dummyCf }), [dummyCf])

  const isQuote = documentType === 'quote'

  // Generate dummy Telegram QR for preview if section is visible
  const telegramQrVisible = config.sections.some((s) => s.id === 'telegram_qr' && s.visible)
  const [telegramQrDataUri, setTelegramQrDataUri] = useState<string | undefined>()
  useEffect(() => {
    if (!telegramQrVisible) {
      setTelegramQrDataUri(undefined)
      return
    }
    import('qrcode').then((QRCode) => {
      QRCode.toDataURL('https://t.me/example_bot', { width: 200, margin: 1 }).then((uri) =>
        setTelegramQrDataUri(uri)
      )
    })
  }, [telegramQrVisible])

  return (
    <div className="rounded-lg shadow-sm overflow-hidden bg-gray-100">
      <PDFViewer
        key={configKey}
        width="100%"
        height={920}
        showToolbar={false}
        style={{ border: 'none' }}
      >
        {isQuote ? (
          <QuotePDF
            data={DUMMY_QUOTE_DATA}
            workshop={DUMMY_WORKSHOP}
            currencyCode={DUMMY_INVOICE_SETTINGS.currencyCode}
            logoDataUri={logoUrl || undefined}
            template={templateConfig}
            customFields={dummyCf}
            labels={labels}
            layoutConfig={config}
          />
        ) : (
          <InvoicePDF
            data={invoiceData}
            workshop={DUMMY_WORKSHOP}
            invoiceSettings={DUMMY_INVOICE_SETTINGS}
            logoDataUri={logoUrl || undefined}
            template={templateConfig}
            telegramQrDataUri={telegramQrDataUri}
            telegramLabel="Chat with us on Telegram"
            labels={labels}
          />
        )}
      </PDFViewer>
    </div>
  )
}