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/*
 *      Copyright 2018 The original authors.
 *
 *      Licensed 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
 *
 *          http://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 io.sundr.swagger.experimental;

import io.sundr.codegen.model.ClassRef;
import io.sundr.codegen.model.Kind;
import io.sundr.codegen.model.Method;
import io.sundr.codegen.model.Property;
import io.sundr.codegen.model.TypeDef;
import io.sundr.codegen.model.TypeDefBuilder;
import io.swagger.codegen.ClientOptInput;
import io.swagger.codegen.Generator;
import io.swagger.codegen.ignore.CodegenIgnoreProcessor;
import io.swagger.codegen.languages.AbstractJavaCodegen;
import io.swagger.models.ComposedModel;
import io.swagger.models.Model;
import io.swagger.models.RefModel;
import io.swagger.models.Swagger;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class SundrioGenerator implements Generator {

    protected final Logger LOGGER = LoggerFactory.getLogger(SundrioGenerator.class);
    protected static final String DOT = ".";
    protected static final String EMPTY = "";

    protected AbstractJavaCodegen config;

    protected final ClientOptInput opts;
    protected final Swagger swagger;

    protected CodegenIgnoreProcessor ignoreProcessor;
    private Boolean generateApis = null;
    private Boolean generateModels = null;
    private Boolean generateSupportingFiles = null;
    private Boolean generateApiTests = null;
    private Boolean generateApiDocumentation = null;
    private Boolean generateModelTests = null;
    private Boolean generateModelDocumentation = null;
    private String basePath;
    private String basePathWithoutHost;
    private String contextPath;

    public SundrioGenerator() {
        this.opts = null;
        this.swagger = null;
    }

    public SundrioGenerator(ClientOptInput opts) {
        this.opts = opts;
        this.swagger = opts.getSwagger();
    }

    @Override
    public Generator opts(ClientOptInput opts) {
        return new SundrioGenerator(opts);
    }



    @Override
    public List generate() {
        List result = new ArrayList<>();
        final Map definitions = swagger.getDefinitions();
        if (definitions == null) {
            return result;
        }
        for (Map.Entry entry : definitions.entrySet()) {
            String name = entry.getKey();
            Model model = entry.getValue();
            //TODO: skip models with import mapping.

                Map modelMap = new HashMap();
                modelMap.put(name, model);
        }
        return result;
    }

    public TypeDef createModel(String name, Model model, AbstractJavaCodegen config, Map allDefinitions) {

        String prefix = name.contains(DOT)
                ? name.substring(0, name.lastIndexOf(DOT))
                : EMPTY;

        String packageName = prefix.isEmpty() ? config.modelPackage() : config.modelPackage() + DOT + prefix;
        String className = prefix.isEmpty() ? name : name.substring(name.lastIndexOf(DOT) + 1);

        ClassRef superClass = null;
        List interfaces = new ArrayList<>();
        List fields = new ArrayList<>();
        List methods = new ArrayList<>();

        if (model instanceof ComposedModel) {
            ComposedModel composed = (ComposedModel) model;

            // interfaces (intermediate models)
            if (composed.getInterfaces() != null) {
                for (RefModel _interface : composed.getInterfaces()) {
                    Model interfaceModel = null;
                    if (allDefinitions != null) {
                        interfaceModel = allDefinitions.get(_interface.getSimpleRef());
                    }

                }

                return new TypeDefBuilder()
                        .withKind(Kind.CLASS)
                        .withPackageName(packageName)
                        .withName(className)
                        .withImplementsList(interfaces)
                        .withExtendsList(superClass)
                        .withProperties(fields)
                        .withMethods(methods)
                        .build();
            }
        }
        return null;
    }

}