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interface ReferenceModel {
  date: string | null;
  scores: { value: number; description: string }[];
}

interface SummaryData {
  reference: {
    date: string;
    scores: { value: number; description: string }[];
  };
  history: ReferenceModel[];
}

const initializeReferenceObject = (): ReferenceModel => ({
  date: null,
  scores: [],
});

const isInitialDate = (referenceObject: ReferenceModel): 
  boolean => referenceObject.date === null;

const clearMapAndIndex = () => {
  return {
    index: 0,
    map: {}
  }
};

const addZeroedScore = (
  type: string,
  referenceObject: ReferenceModel,
  map: Record<string, boolean>,
  arrayRef: string[],
  index: number
): void => {
  const categoryDescription = type === 'variable' ? index : index + 1;

  const modelObject = {
    value: 0.0,
    description: String(categoryDescription),
  };

  referenceObject.scores.push(modelObject);

  const categoryArrayRef = arrayRef[index];
  map[categoryArrayRef] = true;
  index += 1;
};

const isIndexLessThanArrayRef = (
  arrayRef: string[],
  index: number
): boolean => index < arrayRef.length;

const isCategoryDifferentFromArrayRef = (
  arrayRef: string[],
  index: number,
  category?: string
): boolean =>
  !category || category !== arrayRef[index];

const checkMissingScores = (
  type: string, 
  referenceObject: ReferenceModel,
  map: Record<string, boolean>,
  arrayRef: string[],
  index: number,
  category?: string
): void => {
  while (
    isIndexLessThanArrayRef(arrayRef, index) && 
    isCategoryDifferentFromArrayRef(arrayRef, index, category)
  ) {
    addZeroedScore(
      type,
      referenceObject,
      map,
      arrayRef,
      index
    );
  }
};

const shouldNotRepeatCategory = (
  model: any,
  map: Record<string, boolean>
): boolean => {
  return !(model.category in map);
};

const updateReferenceDate = (
  safra: string,
  referenceObject: ReferenceModel
): void => {
  if (isInitialDate(referenceObject)) {
    referenceObject.date = safra;
  }
};

const processDifferentCategory = (
  type: string, 
  model: any,
  referenceObject: ReferenceModel,
  map: Record<string, boolean>,
  arrayRef: string[],
  index: number
): void => {
  if (!isInitialDate(referenceObject) && arrayRef[index] !== model.category) {
    checkMissingScores(
      type, 
      referenceObject,
      map,
      arrayRef,
      index,
      model.category
    );
  }
};

const addCategoryScore = (
  type: string, 
  model: any,
  referenceObject: ReferenceModel,
  map: Record<string, boolean>,
  index: number
): void => {
  const categoryDescription = type === 'variable' ? index : index + 1;

  const modelObject = {
    value: parseFloat(model.percentage.toFixed(2)),
    description: String(categoryDescription),
  };

  referenceObject.scores.push(modelObject);

  map[model.category] = true;
  index += 1;
};

const processNotRepeatedCategory = (
  type: string, 
  model: any, 
  safra: string,
  referenceObject: ReferenceModel,
  map: Record<string, boolean>,
  arrayRef: string[],
  index: number
): void => {
  if (shouldNotRepeatCategory(model, map)) {
    updateReferenceDate(
      safra,
      referenceObject
    );
    processDifferentCategory(
      type, 
      model,
      referenceObject,
      map,
      arrayRef,
      index
    );

    if (arrayRef[index] === model.category) {
      addCategoryScore(
        type, 
        model,
        referenceObject,
        map,
        index
      );
    }
  }
};

const publicDistributionReference = (
  dataDistribution: any, 
  type: string,
  data: SummaryData,
  map: Record<string, boolean>,
  arrayRef: string[],
  index: number
) => {
  dataDistribution.reference.forEach((model: any) => {
    if (!(model.category in map)) {
      const categoryDescription = type === 'variable' ? index : index + 1;

      const modelObject = {
        value: parseFloat(model.percentage.toFixed(2)),
        description: String(categoryDescription),
      };

      data.reference.date = model.safra;
      data.reference.scores.push(modelObject);

      map[model.category] = true;
      arrayRef.push(model.category);
      index += 1;
    }
  });

  return data;
};

const processHistoryModel = (
  dataDistribution: any, 
  type: string,
  data: SummaryData,
  referenceObject: ReferenceModel,
  map: Record<string, boolean>,
  arrayRef: string[],
  index: number
): void => {
  if (dataDistribution.history.length) {
    clearMapAndIndex();

    dataDistribution.history.forEach((model: any) => {
      const safra = String(model.safra);

      if (!isInitialDate(referenceObject) && referenceObject.date !== safra) {
        checkMissingScores(
          type, 
          referenceObject,
          map,
          arrayRef,
          index,
          model.category
        );

        data.history.push({ ...referenceObject });

        referenceObject.date = safra;
        referenceObject.scores = [];

        clearMapAndIndex();
      }

      processNotRepeatedCategory(
        type, 
        model, 
        safra,
        referenceObject,
        map,
        arrayRef,
        index
      );
    });

    checkMissingScores(
      type,
      referenceObject,
      map,
      arrayRef,
      index
    );

    data.history.push({ ...referenceObject });
  }
};

export const publicDistributionSummary = (dataDistribution: any, type: string) => {
  const data: SummaryData = {
    reference: {
      date: '',
      scores: [],
    },
    history: [],
  };
  
  let index: number = 0;
  let map: Record<string, boolean> = {};
  const arrayRef: string[] = [];

  const referenceObject: ReferenceModel = initializeReferenceObject();

  publicDistributionReference(
    dataDistribution, 
    type, 
    data, 
    map,
    arrayRef,
    index
  );
  processHistoryModel(
    dataDistribution, 
    type, 
    data, 
    referenceObject,
    map,
    arrayRef,
    index
  );

  return data;
};
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