"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.createFilter = void 0;
exports.executeAst = executeAst;
var _objects = require("../../../services/objects");
var _predicate = require("../../../services/predicate");
var _operators = require("./operators");
var _ast = require("./ast");
var _nameToOperatorMap;
function _typeof(obj) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) { return typeof obj; } : function (obj) { return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }, _typeof(obj); }
function _defineProperty(obj, key, value) { key = _toPropertyKey(key); if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return _typeof(key) === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (_typeof(input) !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (_typeof(res) !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); } /*
                                                                                                                                                                                                                                                                                                                                                                                               * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
                                                                                                                                                                                                                                                                                                                                                                                               * or more contributor license agreements. Licensed under the Elastic License
                                                                                                                                                                                                                                                                                                                                                                                               * 2.0 and the Server Side Public License, v 1; you may not use this file except
                                                                                                                                                                                                                                                                                                                                                                                               * in compliance with, at your election, the Elastic License 2.0 or the Server
                                                                                                                                                                                                                                                                                                                                                                                               * Side Public License, v 1.
                                                                                                                                                                                                                                                                                                                                                                                               */
var EXPLAIN_FIELD = '__explain';
var nameToOperatorMap = (_nameToOperatorMap = {}, _defineProperty(_nameToOperatorMap, _ast.AST.Operator.EQ, _operators.eq), _defineProperty(_nameToOperatorMap, _ast.AST.Operator.EXACT, _operators.exact), _defineProperty(_nameToOperatorMap, _ast.AST.Operator.GT, _operators.gt), _defineProperty(_nameToOperatorMap, _ast.AST.Operator.GTE, _operators.gte), _defineProperty(_nameToOperatorMap, _ast.AST.Operator.LT, _operators.lt), _defineProperty(_nameToOperatorMap, _ast.AST.Operator.LTE, _operators.lte), _nameToOperatorMap);
var defaultIsClauseMatcher = function defaultIsClauseMatcher(item, clause, explain) {
  var type = clause.type,
    flag = clause.flag,
    match = clause.match;
  var value = (0, _objects.get)(item, clause.flag);
  var must = _ast.AST.Match.isMustClause(clause);
  var hit = !!value === must;
  if (explain && hit) {
    explain.push({
      hit: hit,
      type: type,
      flag: flag,
      match: match
    });
  }
  return hit;
};
var fieldClauseMatcher = function fieldClauseMatcher(item, field) {
  var clauses = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : [];
  var explain = arguments.length > 3 ? arguments[3] : undefined;
  return clauses.every(function (clause) {
    var type = clause.type,
      value = clause.value,
      match = clause.match;
    var operator = nameToOperatorMap[clause.operator];
    if (!operator) {
      // unknown matcher
      return true;
    }
    if (!_ast.AST.Match.isMust(match)) {
      operator = function operator(value, token) {
        return !nameToOperatorMap[clause.operator](value, token);
      };
    }
    var itemValue = (0, _objects.get)(item, field);
    var hit = (0, _predicate.isArray)(value) ? value.some(function (v) {
      return operator(itemValue, v);
    }) : operator(itemValue, value);
    if (explain && hit) {
      explain.push({
        hit: hit,
        type: type,
        field: field,
        value: value,
        match: match,
        operator: operator
      });
    }
    return hit;
  });
};

// You might think that we could specify `item: T` here and do something
// with `keyof`, but that wouldn't work with `nested.field.name`
var extractStringFieldsFromItem = function extractStringFieldsFromItem(item) {
  return Object.keys(item).reduce(function (fields, key) {
    if ((0, _predicate.isString)(item[key])) {
      fields.push(key);
    }
    return fields;
  }, []);
};
var termClauseMatcher = function termClauseMatcher(item, fields) {
  var clauses = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : [];
  var explain = arguments.length > 3 ? arguments[3] : undefined;
  var searchableFields = fields || extractStringFieldsFromItem(item);
  return clauses.every(function (clause) {
    var type = clause.type,
      value = clause.value,
      match = clause.match;
    var isMustClause = _ast.AST.Match.isMustClause(clause);
    var equals = nameToOperatorMap[_ast.AST.Operator.EQ];
    var containsMatches = searchableFields.some(function (field) {
      var itemValue = (0, _objects.get)(item, field);
      var isMatch = equals(itemValue, value);
      if (explain) {
        // If testing for the presence of a term, then we record a match as a match.
        // If testing for the absence of a term, then we invert this logic: we record a
        // non-match as a match.
        var hit = isMustClause && isMatch || !isMustClause && !isMatch;
        if (hit) {
          explain.push({
            hit: hit,
            type: type,
            field: field,
            match: match,
            value: value
          });
        }
      }
      return isMatch;
    });
    if (isMustClause) {
      // If we're testing for the presence of a term, then we only need 1 field to match.
      return containsMatches;
    }

    // If we're testing for the absence of a term, we can't have any matching fields at all.
    return !containsMatches;
  });
};
var createFilter = function createFilter(ast, defaultFields) {
  var isClauseMatcher = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : defaultIsClauseMatcher;
  var explain = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : false;
  // Return items which pass ALL conditions: matches the terms entered, the specified field values,
  // and the specified "is" clauses.
  return function (item) {
    var explainLines = explain ? [] : undefined;
    if (explainLines) {
      // @ts-ignore technically, we could require T to extend `{ __explain?: Explain[] }` but that seems
      // like a ridiculous requirement on the caller.
      item[EXPLAIN_FIELD] = explainLines;
    }
    var termClauses = ast.getTermClauses();
    var fields = ast.getFieldNames();
    var isClauses = ast.getIsClauses();
    var groupClauses = ast.getGroupClauses();
    var isTermMatch = termClauseMatcher(item, defaultFields, termClauses, explainLines);
    if (!isTermMatch) {
      return false;
    }
    var isFieldsMatch = fields.every(function (field) {
      return fieldClauseMatcher(item, field, ast.getFieldClauses(field), explainLines);
    });
    if (!isFieldsMatch) {
      return false;
    }
    var isIsMatch = isClauses.every(function (clause) {
      return isClauseMatcher(item, clause, explainLines);
    });
    if (!isIsMatch) {
      return false;
    }
    var isGroupMatch = groupClauses.every(function (clause) {
      var matchesGroup = clause.value.some(function (clause) {
        if (_ast.AST.Term.isInstance(clause)) {
          return termClauseMatcher(item, defaultFields, [clause], explainLines);
        }
        if (_ast.AST.Field.isInstance(clause)) {
          return fieldClauseMatcher(item, clause.field, [clause], explainLines);
        }
        if (_ast.AST.Is.isInstance(clause)) {
          return isClauseMatcher(item, clause, explainLines);
        }
        throw new Error("Unknown query clause type in group, [".concat(clause.type, "]"));
      });
      return _ast.AST.Match.isMustClause(clause) ? matchesGroup : !matchesGroup;
    });
    return isGroupMatch;
  };
};
exports.createFilter = createFilter;
function executeAst(ast, items) {
  var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
  var isClauseMatcher = options.isClauseMatcher,
    defaultFields = options.defaultFields,
    explain = options.explain;
  var filter = createFilter(ast, defaultFields, isClauseMatcher, explain);
  return items.filter(filter);
}