/*
 * Copyright 2017 the original author or 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 org.gradle.internal.component.external.model;

import org.gradle.api.artifacts.ArtifactIdentifier;
import org.gradle.api.artifacts.component.ModuleComponentIdentifier;
import org.gradle.api.internal.artifacts.DefaultArtifactIdentifier;
import org.gradle.api.internal.artifacts.DefaultModuleVersionIdentifier;
import org.gradle.api.internal.artifacts.dsl.ArtifactFile;
import org.gradle.api.internal.artifacts.repositories.resolver.MavenUniqueSnapshotComponentIdentifier;
import org.gradle.api.internal.tasks.TaskDependencyInternal;
import org.gradle.api.tasks.TaskDependency;
import org.gradle.internal.component.model.DefaultIvyArtifactName;
import org.gradle.internal.component.model.IvyArtifactName;

/**
 * An artifact located relative to some module.
 */
public class UrlBackedArtifactMetadata implements ModuleComponentArtifactMetadata {
    private final ModuleComponentIdentifier componentIdentifier;
    private final String fileName;
    private final String relativeUrl;
    private final ModuleComponentArtifactIdentifier id;

    private IvyArtifactName ivyArtifactName;

    public UrlBackedArtifactMetadata(ModuleComponentIdentifier componentIdentifier, String fileName, String relativeUrl) {
        this.componentIdentifier = componentIdentifier;
        this.fileName = maybeFixFileName(fileName, relativeUrl);
        this.relativeUrl = relativeUrl;
        id = createArtifactId(componentIdentifier, relativeUrl);
    }

    private String maybeFixFileName(String fileName, String relativeUrl) {
        if (relativeUrl.isEmpty() || relativeUrl.endsWith(fileName)) {
            return fileName;
        }
        String[] split = relativeUrl.split("/");
        return split[split.length - 1];
    }

    private ModuleComponentArtifactIdentifier createArtifactId(ModuleComponentIdentifier componentIdentifier, String fileName) {
        if (componentIdentifier instanceof MavenUniqueSnapshotComponentIdentifier) {
            // This special case is for Maven snapshots with Gradle Module Metadata when we need to remap the file name, which
            // corresponds to the unique timestamp, to the SNAPSHOT version, for backwards compatibility
            return new DefaultModuleComponentArtifactIdentifier(
                componentIdentifier,
                getName()
            );
        }
        return new ModuleComponentFileArtifactIdentifier(componentIdentifier, fileName);
    }

    @Override
    public ModuleComponentIdentifier getComponentId() {
        return componentIdentifier;
    }

    @Override
    public ModuleComponentArtifactIdentifier getId() {
        return id;
    }

    public String getFileName() {
        return fileName;
    }

    public String getRelativeUrl() {
        return relativeUrl;
    }

    @Override
    public ArtifactIdentifier toArtifactIdentifier() {
        ArtifactFile names = new ArtifactFile(relativeUrl, componentIdentifier.getVersion());
        return new DefaultArtifactIdentifier(DefaultModuleVersionIdentifier.newId(componentIdentifier), names.getName(), names.getExtension(), names.getExtension(), names.getClassifier());
    }

    @Override
    public IvyArtifactName getName() {
        if (ivyArtifactName == null) {
            ArtifactFile names = new ArtifactFile(relativeUrl, uniqueVersion());
            ivyArtifactName = new DefaultIvyArtifactName(names.getName(), names.getExtension(), names.getExtension(), names.getClassifier());
        }
        return ivyArtifactName;
    }

    @Override
    public TaskDependency getBuildDependencies() {
        return TaskDependencyInternal.EMPTY;
    }

    private String uniqueVersion() {
        if (componentIdentifier instanceof MavenUniqueSnapshotComponentIdentifier) {
            return ((MavenUniqueSnapshotComponentIdentifier) componentIdentifier).getTimestampedVersion();
        }
        return componentIdentifier.getVersion();
    }
}

@@ -1910,47 +1910,16 @@
 e = 
-maybeFixFileName(fileName, relativeUrl)
+fileName
 ;%0A  
@@ -2009,21 +2009,8 @@
 fier
-, relativeUrl
 );%0A 
@@ -2031,530 +2031,187 @@
 ate 
-String maybeFixFileName(String fileName, String relativeUrl) %7B%0A        if (relativeUrl.isEmpty() %7C%7C relativeUrl.endsWith(fileName)) %7B%0A            return fileName;%0A        %7D%0A        String%5B%5D split = relativeUrl.split(%22/%22);%0A        return split%5Bsplit.length - 1%5D;%0A    %7D%0A%0A    private ModuleComponentArtifactIdentifier createArtifactId(ModuleComponentIdentifier componentIdentifier, String fileName) %7B%0A        if (componentIdentifier instanceof MavenUniqueSnapshotComponentIdentifier) %7B%0A            // This special case is for
+ModuleComponentArtifactIdentifier createArtifactId(ModuleComponentIdentifier componentIdentifier) %7B%0A        // This makes sure that next cases are handled correctly:%0A        // 1.
  Mav
@@ -2302,22 +2302,21 @@
         
- 
+//
    
-//
  corresp
@@ -2410,152 +2410,92 @@
     
-  
-  return new DefaultModuleComponentArtifactIdentifier(%0A                componentIdentifier,%0A                getName()%0A            );%0A        %7D
+// 2. Variants with Gradle Module Metadata when file name doesn't match relative url
 %0A   
@@ -2510,16 +2510,23 @@
 urn new 
+Default
 ModuleCo
@@ -2532,20 +2532,16 @@
 omponent
-File
 Artifact
@@ -2572,24 +2572,25 @@
 tifier, 
-file
+get
 Name
+()
 );%0A    %7D

Simplify code in UrlBackedArtifactMetadata