'use client'

import { useTranslations } from 'next-intl'
import { BankDetailsForm, validateBankFields } from '@/components/settings/BankDetailsForm'
import { InvoiceSettingsForm } from '@/components/settings/InvoiceSettingsForm'
import { InvoicePreviewCard } from '@/components/settings/InvoicePreviewCard'
import { PdfPrintSettings } from '@/components/settings/PdfPrintSettings'
import { SettingsFormWrapper } from '@/components/settings/SettingsFormWrapper'
import { SettingsLoadError } from '@/components/settings/SettingsLoadError'
import { SettingsLoadingSkeleton } from '@/components/settings/SettingsLoadingSkeleton'
import { useSettings } from '@/components/settings/useSettings'
import { useToast } from '@/components/ui/use-toast'
import { normaliseSwish } from '@/lib/payments/swish'
import { formatPlusgiroNumber } from '@/lib/bankgiro/luhn'
import type { CompanySettings } from '@/types'

export function InvoicingSettingsContent() {
  const t = useTranslations('settings_invoicing')
  const { settings, isLoading, updateSettings, refetch } = useSettings()
  const { toast } = useToast()

  if (isLoading) return <SettingsLoadingSkeleton />
  if (!settings) return <SettingsLoadError onRetry={refetch} />

  function handleSave(formData: FormData) {
    const bankErrors = validateBankFields(formData)
    if (bankErrors.length > 0) {
      toast({
        title: t('bank_validation_title'),
        description: bankErrors.map(e => e.message).join(', '),
        variant: 'destructive',
      })
      return {}
    }

    const updates: Record<string, unknown> = {
      bank_name: formData.get('bank_name') as string,
      clearing_number: formData.get('clearing_number') as string,
      account_number: formData.get('account_number') as string,
      bankgiro: (formData.get('bankgiro') as string) || null,
      plusgiro: (formData.get('plusgiro') as string)?.trim()
        ? formatPlusgiroNumber((formData.get('plusgiro') as string).trim())
        : null,
      swish: normaliseSwish(formData.get('swish') as string) || null,
      invoice_prefix: (formData.get('invoice_prefix') as string) || null,
      next_invoice_number: parseInt(formData.get('next_invoice_number') as string) || 1,
      invoice_default_days: parseInt(formData.get('invoice_default_days') as string) || 30,
      invoice_default_notes: (formData.get('invoice_default_notes') as string) || null,
      default_our_reference: (formData.get('default_our_reference') as string) || null,
    }
    return {
      updates,
      onSuccess: (data: Record<string, unknown>) => {
        updateSettings(data as Partial<CompanySettings>)
      },
    }
  }

  return (
    <div className="space-y-8">
      <div className="flex justify-end">
        <InvoicePreviewCard settings={settings} />
      </div>

      <SettingsFormWrapper onSave={handleSave} className="space-y-8">
        <BankDetailsForm settings={settings} />
        <div className="border-t border-border pt-8">
          <InvoiceSettingsForm settings={settings} />
        </div>
      </SettingsFormWrapper>

      {/* PDF settings — saves individually via toggle switches */}
      <div className="border-t border-border pt-8">
        <PdfPrintSettings settings={settings} onUpdate={updateSettings} />
      </div>
    </div>
  )
}