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/*
 * Copyright 2014 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.performance.results;

import com.google.common.collect.Lists;

import javax.annotation.Nullable;
import java.util.List;
import java.util.stream.Collectors;

public class CrossBuildPerformanceTestHistory implements PerformanceTestHistory {
    private final List builds;

    private final List newestFirst;
    private final PerformanceExperiment experiment;

    public CrossBuildPerformanceTestHistory(PerformanceExperiment experiment, List builds, List newestFirst) {
        this.experiment = experiment;
        this.builds = builds;
        this.newestFirst = newestFirst;
    }

    public List getBuilds() {
        return builds;
    }

    public List getResults() {
        return newestFirst;
    }

    @Override
    public PerformanceExperiment getExperiment() {
        return experiment;
    }

    @Override
    public List getExecutions() {
        return newestFirst.stream().map(KnownBuildSpecificationsPerformanceTestExecution::new).collect(Collectors.toList());
    }

    @Override
    public int getScenarioCount() {
        return builds.size();
    }

    @Override
    public List getScenarioLabels() {
        return Lists.transform(builds, BuildDisplayInfo::getDisplayName);
    }

    @Override
    public List getScenarios() {
        return builds.stream()
            .map(input -> new ScenarioDefinition() {
                @Override
                public String getDisplayName() {
                    return input.getDisplayName();
                }

                @Override
                public String getTestProject() {
                    return input.getProjectName();
                }

                @Override
                public List getTasks() {
                    return input.getTasksToRun();
                }

                @Override
                public List getCleanTasks() {
                    return input.getCleanTasks();
                }

                @Override
                public List getArgs() {
                    return input.getArgs();
                }

                @Nullable
                @Override
                public List getGradleOpts() {
                    return input.getGradleOpts();
                }

                @Nullable
                @Override
                public Boolean getDaemon() {
                    return input.getDaemon();
                }
            })
            .collect(Collectors.toList());
    }

    private class KnownBuildSpecificationsPerformanceTestExecution implements PerformanceTestExecution {
        private final CrossBuildPerformanceResults results;

        public KnownBuildSpecificationsPerformanceTestExecution(CrossBuildPerformanceResults results) {
            this.results = results;
        }

        @Override
        public String getExecutionId() {
            return String.valueOf(Math.abs(getVcsCommits() != null ? getVcsCommits().hashCode() : hashCode()));
        }

        @Override
        public String getTeamCityBuildId() {
            return results.getTeamCityBuildId();
        }

        @Override
        public String getVersionUnderTest() {
            return results.getVersionUnderTest();
        }

        @Override
        public String getVcsBranch() {
            return results.getVcsBranch();
        }

        @Override
        public long getStartTime() {
            return results.getStartTime();
        }

        @Override
        public long getEndTime() {
            return results.getEndTime();
        }

        @Override
        public List getVcsCommits() {
            return results.getVcsCommits();
        }

        @Override
        public List getScenarios() {
            return builds.stream().map(specification -> results.buildResult(specification.getDisplayName())).collect(Collectors.toList());
        }

        @Override
        public String getOperatingSystem() {
            return results.getOperatingSystem();
        }

        @Override
        public String getHost() {
            return results.getHost();
        }

        @Override
        public String getJvm() {
            return results.getJvm();
        }

        @Nullable
        @Override
        public String getTestProject() {
            return null;
        }

        @Nullable
        @Override
        public List getTasks() {
            return null;
        }

        @Nullable
        @Override
        public List getCleanTasks() {
            return null;
        }

        @Nullable
        @Override
        public List getArgs() {
            return null;
        }

        @Nullable
        @Override
        public List getGradleOpts() {
            return null;
        }

        @Nullable
        @Override
        public Boolean getDaemon() {
            return null;
        }
    }
}