#EventDefinition

type EventDefinition<TModel extends FlowModel = FlowModel, TCtx extends FlowContext = FlowContext> = ActionDefinition<TModel, TCtx>;

// Globale registratie (via FlowEngine)
const engine = new FlowEngine();
engine.registerEvent({
  name: 'clickEvent',
  title: 'Click Event',
  handler: async (ctx, params) => {
    // Logica voor gebeurtenisafhandeling
  }
});

// Registratie op modelniveau (via FlowModel)
class MyModel extends FlowModel {}
MyModel.registerEvent({
  name: 'submitEvent',
  title: 'Submit Event',
  handler: async (ctx, params) => {
    // Logica voor gebeurtenisafhandeling
  }
});

// Gebruik in een workflow
MyModel.registerFlow({
  key: 'formFlow',
  on: 'submitEvent',  // Verwijst naar een geregistreerde gebeurtenis
  steps: {
    step1: {
      use: 'processFormAction'
    }
  }
});

name: 'clickEvent'
name: 'submitEvent'
name: 'customEvent'

title: 'Click Event'
title: 'Form Submit'
title: 'Data Change'

handler: async (ctx, params) => {
  const { model, flowEngine } = ctx;
  
  try {
    // Voer de logica voor gebeurtenisafhandeling uit
    const result = await handleEvent(params);
    
    // Retourneer het resultaat
    return {
      success: true,
      data: result,
      message: 'Event handled successfully'
    };
  } catch (error) {
    return {
      success: false,
      error: error.message
    };
  }
}

// Statische standaardparameters
defaultParams: {
  preventDefault: true,
  stopPropagation: false
}

// Dynamische standaardparameters
defaultParams: (ctx) => {
  return {
    timestamp: Date.now(),
    userId: ctx.model.uid,
    eventSource: 'user'
  }
}

// Asynchrone standaardparameters
defaultParams: async (ctx) => {
  const userInfo = await getUserInfo();
  return {
    user: userInfo,
    session: await getSessionInfo()
  }
}

uiSchema: {
  'x-component': 'Form',
  'x-component-props': {
    layout: 'vertical'
  },
  properties: {
    preventDefault: {
      type: 'boolean',
      title: 'Standaardactie voorkomen',
      'x-component': 'Switch',
      'x-decorator': 'FormItem'
    },
    stopPropagation: {
      type: 'boolean',
      title: 'Propagatie stoppen',
      'x-component': 'Switch',
      'x-decorator': 'FormItem'
    },
    customData: {
      type: 'object',
      title: 'Aangepaste gegevens',
      'x-component': 'Form',
      'x-decorator': 'FormItem',
      properties: {
        key: {
          type: 'string',
          title: 'Sleutel',
          'x-component': 'Input'
        },
        value: {
          type: 'string',
          title: 'Waarde',
          'x-component': 'Input'
        }
      }
    }
  }
}

beforeParamsSave: (ctx, params, previousParams) => {
  // Parametervalidatie
  if (!params.eventType) {
    throw new Error('Event type is required');
  }
  
  // Parametertransformatie
  params.eventType = params.eventType.toLowerCase();
  
  // Wijzigingen loggen
  console.log('Event params changed:', {
    from: previousParams,
    to: params
  });
}

afterParamsSave: (ctx, params, previousParams) => {
  // Loggen
  console.log('Event params saved:', params);
  
  // Gebeurtenis activeren
  ctx.model.emitter.emit('eventConfigChanged', {
    eventName: 'clickEvent',
    params,
    previousParams
  });
  
  // Cache bijwerken
  ctx.model.updateCache('eventConfig', params);
}

// Eenvoudige modus
uiMode: 'dialog'

// Aangepaste configuratie
uiMode: {
  type: 'dialog',
  props: {
    width: 600,
    title: 'Gebeurtenisconfiguratie'
  }
}

// Dynamische modus
uiMode: (ctx) => {
  return ctx.model.isMobile ? 'drawer' : 'dialog';
}

class FormModel extends FlowModel {}

// Registreer formulierindieningsgebeurtenis
FormModel.registerEvent({
  name: 'formSubmitEvent',
  title: 'Formulierindieningsgebeurtenis',
  handler: async (ctx, params) => {
    const { formData, validation } = params;
    
    try {
      // Valideer formuliergegevens
      if (validation && !validateFormData(formData)) {
        throw new Error('Form validation failed');
      }
      
      // Verwerk formulierindiening
      const result = await submitForm(formData);
      
      return {
        success: true,
        data: result,
        message: 'Form submitted successfully'
      };
    } catch (error) {
      return {
        success: false,
        error: error.message
      };
    }
  },
  defaultParams: {
    validation: true,
    preventDefault: true,
    stopPropagation: false
  },
  uiSchema: {
    'x-component': 'Form',
    properties: {
      validation: {
        type: 'boolean',
        title: 'Validatie inschakelen',
        'x-component': 'Switch',
        'x-decorator': 'FormItem',
        default: true
      },
      preventDefault: {
        type: 'boolean',
        title: 'Standaardactie voorkomen',
        'x-component': 'Switch',
        'x-decorator': 'FormItem',
        default: true
      },
      stopPropagation: {
        type: 'boolean',
        title: 'Propagatie stoppen',
        'x-component': 'Switch',
        'x-decorator': 'FormItem',
        default: false
      },
      customHandlers: {
        type: 'array',
        title: 'Aangepaste handlers',
        'x-component': 'ArrayItems',
        'x-decorator': 'FormItem',
        items: {
          type: 'object',
          properties: {
            name: {
              type: 'string',
              title: 'Handlernaam',
              'x-component': 'Input'
            },
            enabled: {
              type: 'boolean',
              title: 'Ingeschakeld',
              'x-component': 'Switch'
            }
          }
        }
      }
    }
  },
  beforeParamsSave: (ctx, params) => {
    if (params.validation && !params.formData) {
      throw new Error('Form data is required when validation is enabled');
    }
  },
  afterParamsSave: (ctx, params) => {
    ctx.model.emitter.emit('formEventConfigChanged', params);
  },
  uiMode: 'dialog'
});

// Registreer gegevenswijzigingsgebeurtenis
FormModel.registerEvent({
  name: 'dataChangeEvent',
  title: 'Gegevenswijzigingsgebeurtenis',
  handler: async (ctx, params) => {
    const { field, oldValue, newValue } = params;
    
    try {
      // Log gegevenswijziging
      await logDataChange({
        field,
        oldValue,
        newValue,
        timestamp: Date.now(),
        userId: ctx.model.uid
      });
      
      // Activeer gerelateerde acties
      ctx.model.emitter.emit('dataChanged', {
        field,
        oldValue,
        newValue
      });
      
      return {
        success: true,
        message: 'Data change logged successfully'
      };
    } catch (error) {
      return {
        success: false,
        error: error.message
      };
    }
  },
  defaultParams: (ctx) => ({
    logLevel: 'info',
    notify: true,
    timestamp: Date.now()
  }),
  uiMode: 'embed'
});

// Gebeurtenissen gebruiken in een workflow
FormModel.registerFlow({
  key: 'formProcessing',
  title: 'Formulierverwerking',
  on: 'formSubmitEvent',
  steps: {
    validate: {
      use: 'validateFormAction',
      title: 'Formulier valideren',
      sort: 0
    },
    process: {
      use: 'processFormAction',
      title: 'Formulier verwerken',
      sort: 1
    },
    save: {
      use: 'saveFormAction',
      title: 'Formulier opslaan',
      sort: 2
    }
  }
});