"use client";

import React, { useEffect, useMemo, useCallback } from "react";
import { 
  EntityFormWrapper,
  ServerActionForm,
  FormActions,
  TextField,
  EmailField,
  TextAreaField,
  useServerActionForm
} from "../../dashboard/entity-detail/shared";
import { euResponsiblePersonConfig, euResponsiblePersonSchema } from "../../dashboard/entity-detail/entities/eu-responsible-person/EuResponsiblePersonConfig";
import { useAction } from "@/hooks/useAction";
import { createEuResponsiblePerson, updateEuResponsiblePerson, deleteEuResponsiblePerson } from "@/actions/catalog";
import type { z } from "zod";
import { toast } from "sonner";

type EuResponsiblePersonFormData = z.infer<typeof euResponsiblePersonSchema>;

interface EuResponsiblePersonFormProps {
  initialData?: Partial<EuResponsiblePersonFormData> & { id?: string };
  onSave?: () => void;
  onCancel?: () => void;
  onDataChange?: () => void;
}

export function EuResponsiblePersonForm({ 
  initialData, 
  onSave, 
  onCancel,
  onDataChange
}: EuResponsiblePersonFormProps) {
  const { execute: executeDelete, isLoading: isDeleting } = useAction(deleteEuResponsiblePerson);

  const getMappedValues = useCallback((data: any) => ({
    companyName: data?.companyName || data?.company_name || "",
    email: data?.email || "",
    phoneNumber: data?.phoneNumber || data?.phone_number || "",
    isActive: (data?.isActive ?? data?.is_active ?? true).toString() as "true" | "false",
    address: (data?.address && typeof data.address === 'object') ? data.address : {
      street: typeof data?.address === 'string' ? data.address : "",
      city: "",
      postal_code: "",
      country: "Deutschland"
    },
  }), []);

  const mappedValues = useMemo(() => getMappedValues(initialData), [initialData, getMappedValues]);

  const { form, onSubmit, isPending, handleSubmit, reset } = useServerActionForm({
    schema: euResponsiblePersonSchema,
    defaultValues: mappedValues,
    serverAction: async (data) => {
      const addressString = data.address && typeof data.address === 'object'
        ? `${data.address.street || ""}, ${data.address.postal_code || ""} ${data.address.city || ""}, ${data.address.country || ""}`
        : typeof data.address === 'string' ? data.address : "";
        
      const actionData = {
        companyName: data.companyName,
        email: data.email || "",
        phoneNumber: data.phoneNumber,
        address: addressString
      };

      if (initialData?.id) {
        return await updateEuResponsiblePerson({ id: initialData.id, data: actionData });
      } else {
        return await createEuResponsiblePerson(actionData);
      }
    },
    onSuccess: () => {
      toast.success(initialData?.id ? "EU-Verantwortlicher aktualisiert" : "EU-Verantwortlicher erstellt");
      onSave?.();
      onDataChange?.();
    },
  });

  // Sync form with initialData when it changes
  useEffect(() => {
    reset(mappedValues);
  }, [mappedValues, reset]);

  const handleDelete = async () => {
    if (!initialData?.id) return;

    if (confirm(`Möchten Sie den EU-Verantwortlichen "${initialData.companyName}" wirklich löschen?`)) {
      const result = await executeDelete({ id: initialData.id });
      if (result?.success) {
        toast.success("EU-Verantwortlicher gelöscht");
        onSave?.();
        onDataChange?.();
      }
    }
  };

  return (
    <EntityFormWrapper
      title={initialData?.id ? "EU-Verantwortlichen bearbeiten" : "Neuer EU-Verantwortlicher"}
      description={
        initialData?.id 
          ? "Aktualisieren Sie die Informationen des EU-Verantwortlichen."
          : "Erstellen Sie einen neuen EU-Verantwortlichen."
      }
    >
      <ServerActionForm
        form={form}
        isPending={isPending || isDeleting}
        onSubmit={onSubmit}
        handleSubmit={handleSubmit}
      >
        {euResponsiblePersonConfig.formSections?.map((section, sectionIndex) => (
          <div key={sectionIndex} className="space-y-4">
            <h3 className="text-sm font-medium text-muted-foreground uppercase tracking-wider">
              {section.title}
            </h3>
            
            <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
              {section.fields.map((fieldKey) => {
                const field = euResponsiblePersonConfig.fields[fieldKey];
                if (!field) return null;
                
                switch (field.key) {
                  case 'companyName':
                  case 'phoneNumber':
                    return (
                      <TextField key={field.key} form={form} name={field.key} label={field.label} placeholder={field.placeholder} required={field.required} />
                    );
                  case 'email':
                    return (
                      <EmailField key={field.key} form={form} name="email" label={field.label} placeholder={field.placeholder} required={field.required} />
                    );
                  case 'address':
                    return (
                      <TextAreaField key={field.key} form={form} name="address" label={field.label} placeholder={field.placeholder} rows={3} />
                    );
                  default:
                    return null;
                }
              })}
            </div>
          </div>
        ))}

        <FormActions
          isPending={isPending}
          onCancel={onCancel}
          submitLabel={initialData?.id ? "Aktualisieren" : "Erstellen"}
          showDelete={!!initialData?.id}
          onDelete={handleDelete}
        />
      </ServerActionForm>
    </EntityFormWrapper>
  );
}