/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *
 *    https://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License.
 */
package org.grails.web.mapping.servlet

import groovy.transform.CompileStatic

import org.springframework.beans.factory.annotation.Autowired
import org.springframework.http.HttpStatus

import org.springframework.boot.web.error.ErrorPage
import org.springframework.boot.web.server.WebServerFactoryCustomizer
import org.springframework.boot.web.server.servlet.ConfigurableServletWebServerFactory

import grails.web.mapping.UrlMapping
import grails.web.mapping.UrlMappings
import org.grails.web.mapping.ResponseCodeMappingData
import org.grails.web.mapping.ResponseCodeUrlMapping

/**
 * Customizes the error pages based on UrlMappings
 *
 * @author Graeme Rocher
 * @since 3.0
 */
@CompileStatic
class UrlMappingsErrorPageCustomizer implements WebServerFactoryCustomizer<ConfigurableServletWebServerFactory> {

    @Autowired
    UrlMappings urlMappings

    @Override
    void customize(ConfigurableServletWebServerFactory container) {
        final UrlMapping[] allMappings = urlMappings.getUrlMappings()

        List<ErrorPage> errorPages = []
        for (UrlMapping urlMapping : allMappings) {
            if (urlMapping instanceof ResponseCodeUrlMapping) {
                ResponseCodeUrlMapping responseCodeUrlMapping = (ResponseCodeUrlMapping) urlMapping
                ResponseCodeMappingData data = (ResponseCodeMappingData) responseCodeUrlMapping.urlData
                final int code = data.responseCode
                errorPages << new ErrorPage(HttpStatus.valueOf(code), '/error')

            }
        }
        container.addErrorPages(errorPages as ErrorPage[])
    }
}
