import * as plugins from './smartobject.plugins';

const fastDeepEqual = plugins.fastDeepEqual;
export { fastDeepEqual };

export interface IObjectCompareResult {
  presentInBothProperties: string[];
  missingProperties: string[];
  additionalProperties: string[];
  nulledProperties: string[];
  undefinedProperties: string[];
  divergingProperties: string[];
  equalProperties: string[];
}

export const compareObjects = (
  referenceObjectArg: any,
  comparisonObjectArg: any
): IObjectCompareResult => {
  const returnComparisonObject = {
    missingProperties: [] as string[],
    additionalProperties: [] as string[],
    presentInBothProperties: [] as string[],
    nulledProperties: [] as string[],
    undefinedProperties: [] as string[],
    divergingProperties: [] as string[],
    equalProperties: [] as string[],
  };

  const allProperties = Object.keys(referenceObjectArg).concat(Object.keys(comparisonObjectArg));
  for (const currentProperty of allProperties) {
    // lets find presentInBothProperties
    if (referenceObjectArg[currentProperty] && comparisonObjectArg[currentProperty]) {
      returnComparisonObject.presentInBothProperties.push(currentProperty);
    }

    // lets find missingProperties
    if (referenceObjectArg[currentProperty] && !comparisonObjectArg[currentProperty]) {
      returnComparisonObject.missingProperties.push(currentProperty);
    }

    // lets find additionalProperties
    if (!referenceObjectArg[currentProperty] && comparisonObjectArg[currentProperty]) {
      returnComparisonObject.additionalProperties.push(currentProperty);
    }

    // lets find nulledProperties
    if (comparisonObjectArg[currentProperty] === null) {
      returnComparisonObject.nulledProperties.push(currentProperty);
    }

    // lets find undefinedProperties
    if (comparisonObjectArg[currentProperty] === undefined) {
      returnComparisonObject.undefinedProperties.push(currentProperty);
    }

    // lets find divergingProperties
    if (
      JSON.stringify(referenceObjectArg[currentProperty]) !==
      JSON.stringify(comparisonObjectArg[currentProperty])
    ) {
      returnComparisonObject.divergingProperties.push(currentProperty);
    }

    // lets find equalProperties
    if (
      JSON.stringify(referenceObjectArg[currentProperty]) ===
      JSON.stringify(comparisonObjectArg[currentProperty])
    ) {
      returnComparisonObject.equalProperties.push(currentProperty);
    }
  }

  for (const currentProperty of Object.keys(returnComparisonObject)) {
    const onlyUnique = (value: any, index: number, self: Array<any>) => {
      return self.indexOf(value) === index;
    };
    const uniqueArray = returnComparisonObject[currentProperty as keyof(typeof returnComparisonObject)].filter(onlyUnique);
    returnComparisonObject[currentProperty as keyof(typeof returnComparisonObject)] = uniqueArray;
  }

  return returnComparisonObject;
};

/**
 * adds an object to the parent object if it doesn't exists
 * @param parentObject
 * @param childParam
 * @param logBool
 * @returns {boolean}
 */
export const smartAdd = (
  parentObject: object,
  childParam: string,
  valueArg: any = {},
  optionsArg?: {
    interpretDotsAsLevel: boolean;
  }
): typeof parentObject & any => {
  optionsArg = {
    interpretDotsAsLevel: true,
    ...optionsArg
  };

  let paramLevels: string[];
  let referencePointer: any = parentObject;
  if (optionsArg.interpretDotsAsLevel) {
    paramLevels = childParam.split('.');
  } else {
    paramLevels = [childParam];
  }

  for (let i = 0; i !== paramLevels.length; i++) {
    const varName: string = paramLevels[i];

    // is there a next variable ?
    const varNameNext: string = (() => {
      if (paramLevels[i + 1]) {
        return paramLevels[i + 1];
      }
      return null;
    })();

    // build the tree in parentObject
    if (!referencePointer[varName] && !varNameNext) {
      referencePointer[varName] = valueArg;
      referencePointer = null;
    } else if (!referencePointer[varName] && varNameNext) {
      referencePointer[varName] = {};
      referencePointer = referencePointer[varName];
    } else if (referencePointer[varName] && varNameNext) {
      referencePointer = referencePointer[varName];
    } else {
      throw new Error('Something is strange!');
    }
  }
  return parentObject;
};

/**
 * gets an object from the parent object using dots as levels by default
 * @param parentObject
 * @param childParam
 * @param optionsArg
 */
export const smartGet = <T>(
  parentObject: object,
  childParam: string,
  optionsArg?: {
    interpretDotsAsLevel: boolean;
  }
): T => {
  optionsArg = {
    interpretDotsAsLevel: true,
    ...optionsArg
  };

  let paramLevels: string[];
  if (optionsArg.interpretDotsAsLevel) {
    paramLevels = childParam.split('.');
  } else {
    paramLevels = [childParam];
  }

  let referencePointer: any = parentObject;
  for (const level of paramLevels) {
    if (referencePointer[level as any]) {
      referencePointer = referencePointer[level as any];
    } else {
      return null;
    }
  }
  return referencePointer as T;
};

/**
 * checks if an object has a parameter with a given key name, returns true if yes.
 * @param parentObject
 * @param childParam
 * @returns {boolean}
 */
export let exists = (parentObject: object, childParam: string): boolean => {
  if (parentObject.hasOwnProperty(childParam)) {
    return true;
  }
  return false;
};

/**
 * runs a function for all properties of an object whose key matches a regex expression
 * @param parentObjectArg the parent object
 * @param wildcardArg the rege expression to match the property keys against
 * @param callbackArg the function to run with those properties
 */
export let forEachMinimatch = async (parentObjectArg: any, wildcardArg: string, callbackArg: (matchedArg: string) => void) => {
  let propertyNames = Object.getOwnPropertyNames(parentObjectArg);
  let propertyNamesMatched = propertyNames.filter(propertyNameArg => {
    return plugins.minimatch(propertyNameArg, wildcardArg);
  });
  for (let propertyNameArg of propertyNamesMatched) {
    await callbackArg(parentObjectArg[propertyNameArg]);
  }
};