import React, { useState, useMemo } from 'react';
import { CreateButtonProps } from '../ButtonTypes';
import Button from '../Button';
import { Popup } from '../../Popup';
import { FormGeneratorForm, AttributeDefinition } from '../../../FormGenerator/FormGeneratorForm';
import { useLanguage } from '../../../../providers/language/LanguageContext';

const CreateButton: React.FC<CreateButtonProps> = ({
  onCreate,
  fields,
  popupTitle = 'Neues Element erstellen',
  popupSize = 'medium',
  disabled = false,
  loading = false,
  className = '',
  children,
  icon,
  iconPosition = 'left',
  variant = 'primary',
  size = 'md',
  onSuccess,
  onError,
  ...props
}) => {
  const { t } = useLanguage();
  const [isCreating, setIsCreating] = useState(false);
  const [isPopupOpen, setIsPopupOpen] = useState(false);

  // Convert CreateButtonFieldConfig to AttributeDefinition format
  const attributes: AttributeDefinition[] = useMemo(() => {
    return fields.map(field => {
      // Convert options to AttributeOption[] format
      let options: AttributeDefinition['options'] = undefined;
      
      if (field.options) {
        // If options is an array of strings, convert to AttributeOption format
        if (Array.isArray(field.options)) {
          options = field.options.map((opt: any) => {
            if (typeof opt === 'string') {
              return { value: opt, label: opt };
            }
            // Already in {value, label} format
            return opt;
          });
        }
      } else if (field.optionsReference) {
        // Use optionsReference as string (will be fetched from API)
        options = field.optionsReference;
      }
      
      // Map field types to FormGeneratorForm attribute types
      let attributeType: AttributeDefinition['type'] = 'text';
      if (field.type === 'boolean') {
        attributeType = 'checkbox';
      } else if (field.type === 'enum') {
        attributeType = 'select';
      } else if (field.type === 'multiselect') {
        attributeType = 'multiselect';
      } else if (field.type === 'email') {
        attributeType = 'email';
      } else if (field.type === 'date') {
        attributeType = 'date';
      } else if (field.type === 'textarea') {
        attributeType = 'textarea';
      } else if (field.type === 'readonly') {
        attributeType = 'readonly';
      } else if (field.type === 'string') {
        // Check if it's a password field by key name
        attributeType = field.key.toLowerCase().includes('password') ? 'password' : 'text';
      }
      
      return {
        name: field.key,
        label: typeof field.label === 'string' ? field.label : String(field.label),
        type: attributeType,
        required: field.required || false,
        placeholder: field.placeholder,
        default: field.defaultValue,
        editable: true,
        visible: true,
        minRows: field.minRows,
        maxRows: field.maxRows,
        validation: field.validator,
        options: options
      };
    });
  }, [fields]);

  // Initialize form data with default values
  const initialFormData = useMemo(() => {
    const data: any = {};
    fields.forEach(field => {
      if (field.type === 'multiselect') {
        // Multiselect fields should default to empty array
        data[field.key] = field.defaultValue || [];
      } else if (field.type === 'boolean') {
        // Boolean fields should default to false
        data[field.key] = field.defaultValue !== undefined ? field.defaultValue : false;
      } else {
        // Other fields default to empty string or provided default
        data[field.key] = field.defaultValue !== undefined ? field.defaultValue : '';
      }
    });
    return data;
  }, [fields]);

  const handleButtonClick = () => {
    if (!disabled && !loading && !isCreating) {
      setIsPopupOpen(true);
    }
  };

  const handleSave = async (updatedData: any) => {
    setIsCreating(true);
    
    try {
      const result = await onCreate(updatedData);
      
      if (result?.success !== false) {
        // Success
        setIsPopupOpen(false);
        if (onSuccess) {
          onSuccess(result);
        }
      } else {
        // Handle error
        if (onError) {
          onError(result?.error || 'Creation failed');
        }
      }
    } catch (error: any) {
      console.error('Creation failed:', error);
      if (onError) {
        onError(error.message || t('Erstellung fehlgeschlagen'));
      }
    } finally {
      setIsCreating(false);
    }
  };

  const handleCancel = () => {
    setIsPopupOpen(false);
  };

  const isDisabled = disabled || loading || isCreating;
  
  const resolvedPopupTitle = popupTitle;
  const resolvedAttributes = attributes;

  return (
    <>
      <Button
        {...props}
        variant={variant}
        size={size}
        disabled={isDisabled}
        loading={false}
        className={`createButton ${className}`}
        onClick={handleButtonClick}
        icon={isCreating ? undefined : icon}
        iconPosition={iconPosition}
      >
        {isCreating && (
          <div className="spinnerIcon" style={{ marginRight: '8px' }} />
        )}
        {children || (isCreating ? t('Erstellen...') : t('Erstellen'))}
      </Button>

      {/* Create Popup */}
      <Popup
        isOpen={isPopupOpen}
        title={resolvedPopupTitle}
        onClose={handleCancel}
        size={popupSize}
        closable={!isCreating}
      >
        <FormGeneratorForm
          attributes={resolvedAttributes}
          data={initialFormData}
          mode="create"
          onSubmit={handleSave}
          onCancel={handleCancel}
          submitButtonText={t('Erstellen')}
          cancelButtonText={t('Abbrechen')}
        />
      </Popup>
    </>
  );
};

export default CreateButton;