/**
 * @module adaptive-expressions
 */
/**
 * Copyright (c) Microsoft Corporation. All rights reserved.
 * Licensed under the MIT License.
 */

import { Expression } from '../expression';
import { EvaluateExpressionDelegate, ExpressionEvaluator } from '../expressionEvaluator';
import { ExpressionType } from '../expressionType';
import { FunctionUtils } from '../functionUtils';
import { InternalFunctionUtils } from '../functionUtils.internal';
import { ReturnType } from '../returnType';

/**
 * Replace a substring with the specified string, and return the result string.
 * This function is case-insensitive.
 */
export class ReplaceIgnoreCase extends ExpressionEvaluator {
    /**
     * Initializes a new instance of the [ReplaceIgnoreCase](xref:adaptive-expressions.ReplaceIgnoreCase) class.
     */
    constructor() {
        super(
            ExpressionType.ReplaceIgnoreCase,
            ReplaceIgnoreCase.evaluator(),
            ReturnType.String,
            ReplaceIgnoreCase.validator
        );
    }

    /**
     * @private
     */
    private static evaluator(): EvaluateExpressionDelegate {
        return FunctionUtils.applyWithError((args: any[]): any => {
            let error = undefined;
            let result = undefined;
            if (InternalFunctionUtils.parseStringOrUndefined(args[1]).length === 0) {
                error = `${args[1]} should be a string with length at least 1`;
            }

            if (!error) {
                result = InternalFunctionUtils.parseStringOrUndefined(args[0]).replace(
                    // eslint-disable-next-line security/detect-non-literal-regexp
                    new RegExp(InternalFunctionUtils.parseStringOrUndefined(args[1]), 'gi'),
                    InternalFunctionUtils.parseStringOrUndefined(args[2])
                );
            }

            return { value: result, error };
        }, FunctionUtils.verifyStringOrNull);
    }

    /**
     * @private
     */
    private static validator(expression: Expression): void {
        FunctionUtils.validateArityAndAnyType(expression, 3, 3, ReturnType.String);
    }
}