package it.unitn.molerat.repos.trackers.vuln;

import it.unitn.molerat.repos.wrappers.GitRepoWrapper;
import it.unitn.molerat.repos.wrappers.RepoWrapper;
import it.unitn.molerat.repos.wrappers.SvnRepoWrapper;

public class VulnerabilityEvidenceTrackerFactory {

    public static VulnerabilityEvidenceTracker getTracker(String repoRoot, String fixedRev, String wrapperType, String trackerType) throws Exception {
        RepoWrapper wrapper = null;
		switch (wrapperType.toLowerCase()) {
			case "svn":
				wrapper = new SvnRepoWrapper(repoRoot);
				break;

			case "git":
				wrapper = new GitRepoWrapper(repoRoot);
				break;

			default:
				throw new Exception("There is currently no support for '" + wrapperType + "'");
		}
        VulnerabilityEvidenceTracker vulnerabilityEvidenceTracker = null;
        switch (trackerType.toLowerCase()) {
            case "deletionvulnerabilityevidencetracker":
                vulnerabilityEvidenceTracker = new DeletionVulnerabilityEvidenceTracker(wrapper, fixedRev);
                break;

            case "slicevulnerabilityevidencetracker":
                vulnerabilityEvidenceTracker = new SliceVulnerabilityEvidenceTracker(wrapper, fixedRev);
                break;

            case "slicedecayvulnerabilityevidencetracker":
                vulnerabilityEvidenceTracker = new SliceDecayVulnerabilityEvidenceTracker(wrapper, fixedRev);
                break;

            case "patchedmethodbodytracker":
                vulnerabilityEvidenceTracker = new PatchedMethodBodyTracker(wrapper, fixedRev);
                break;

            case "enhanceddeletionvulnerabilityevidencetracker":
                vulnerabilityEvidenceTracker = new EnhancedDeletionVulnerabilityEvidenceTracker(wrapper, fixedRev);
                break;

            case "fixstatisticsvulnerabilityevidencetracker":
                vulnerabilityEvidenceTracker = new FixStatisticsVulnerabilityEvidenceTracker(wrapper, fixedRev);
                break;

            default:
                throw new Exception("There is no such molerat.evidence tracker as '" + trackerType + "'");
        }
        return vulnerabilityEvidenceTracker;
    }

    public static String getTrackersList() {
        StringBuilder builder = new StringBuilder();
        builder.append("--------------------\n");
        builder.append("The list of available vulnerability molerat.evidence trackers:\n");
        builder.append("--------------------\n");
        builder.append("\n");
        builder.append("\t\"SliceDecayVulnerabilityEvidenceTracker\" - track intra-procedural slice over the fixed lines.\n");
        builder.append("\n");
        builder.append("\t\"DeletionVulnerabilityEvidenceTracker\" - track only the lines deleted during a fix.\n");
        builder.append("\n");
        builder.append("\t\"PatchedMethodBodyTracker\" - track the entire fixed methods.\n");
        builder.append("\n");
        builder.append("\t\"EnhancedDeletionVulnerabilityEvidenceTracker\" - track only the lines deleted during a fix, " +
                "or the entire fixed methods if there are no deleted lines.\n");
        builder.append("\n");
        builder.append("--------------------\n");
        return builder.toString();
    }
}