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'use strict';

const _ = require('lodash');
const Mongoose = require('mongoose');
const { parseType } = require('strapi-utils');

/**
 * Module dependencies
 */

module.exports = (mongoose = Mongoose) => {
  mongoose.Schema.Types.Decimal = require('mongoose-float').loadType(mongoose, 2);
  mongoose.Schema.Types.Float = require('mongoose-float').loadType(mongoose, 20);

/**
   * Convert MongoDB ID to the stringify version as GraphQL throws an error if not.
   *
   * Refer to: https://github.com/graphql/graphql-js/commit/3521e1429eec7eabeee4da65c93306b51308727b#diff-87c5e74dd1f7d923143e0eee611f598eR183
   */
  mongoose.Types.ObjectId.prototype.valueOf = function() {
    return this.toString();
  };

const convertType = (name, attr) => {
    if (_.has(attr, 'columnType')) {
      return { type: attr.columnType };
    }

switch (attr.type.toLowerCase()) {
      case 'array':
        return { type: Array };
      case 'boolean':
        return { type: 'Boolean' };
      case 'binary':
        return { type: 'Buffer' };
      case 'time':
        return {
          type: String,
          validate: value =>
            (!attr.required && _.isNil(value)) || parseType({ type: 'time', value }),
          set: value =>
            !attr.required && _.isNil(value) ? value : parseType({ type: 'time', value }),
        };
      case 'date':
        return {
          type: String,
          validate: value =>
            (!attr.required && _.isNil(value)) || parseType({ type: 'date', value }),
          set: value =>
            !attr.required && _.isNil(value) ? value : parseType({ type: 'date', value }),
        };
      case 'datetime':
        return {
          type: Date,
        };
      case 'timestamp':
        return {
          type: Date,
        };
      case 'decimal':
        return { type: 'Decimal' };
      case 'float':
        return { type: 'Float' };
      case 'json':
        return { type: 'Mixed' };
      case 'biginteger':
        return { type: 'Long' };
      case 'integer':
        return { type: 'Number' };
      case 'uuid':
        return { type: 'ObjectId' };
      case 'enumeration':
        return {
          type: 'String',
          enum: attr.enum.concat(null),
          default: null,
        };
      case 'email':
      case 'password':
      case 'string':
      case 'text':
      case 'richtext':
        return { type: 'String' };
      case 'uid': {
        return {
          type: 'String',
          index: {
            unique: true,
            partialFilterExpression: { [name]: { $type: 'string' } },
          },
        };
      }
      default:
        return undefined;
    }
  };

const isMongoId = value => {
    if (value instanceof mongoose.Types.ObjectId) {
      return true;
    }

if (!_.isString(value)) {
      return false;
    }

// Here we don't use mongoose.Types.ObjectId.isValid method because it's a weird check,
    // it returns for instance true for any integer value
    const hexadecimal = /^[0-9A-F]+$/i;
    return hexadecimal.test(value) && value.length === 24;
  };

const valueToId = value => {
    if (Array.isArray(value)) return value.map(valueToId);

if (isMongoId(value)) {
      return mongoose.Types.ObjectId(value);
    }

return value;
  };

return {
    convertType,
    valueToId,
    isMongoId,
  };
};