/*
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*/

using NGit.Revplot;
using NGit.Revwalk;
using NUnit.Framework;
using Sharpen;

namespace NGit.Revplot
{
	[NUnit.Framework.TestFixture]
	public class PlotCommitListTest : RevWalkTestCase
	{
		internal class CommitListAssert
		{
			private PlotCommitList<PlotLane> pcl;

			private PlotCommit<PlotLane> current;

			private int nextIndex = 0;

			internal CommitListAssert(PlotCommitListTest _enclosing, PlotCommitList<PlotLane>
				 pcl)
			{
				this._enclosing = _enclosing;
				this.pcl = pcl;
			}

			public virtual PlotCommitListTest.CommitListAssert Commit(RevCommit id)
			{
				NUnit.Framework.Assert.IsTrue(this.pcl.Count > this.nextIndex, "Unexpected end of list at pos#"
					 + this.nextIndex);
				this.current = this.pcl[this.nextIndex++];
				NUnit.Framework.Assert.AreEqual(id.Id, this.current.Id, "Expected commit not found at pos#"
					 + (this.nextIndex - 1));
				return this;
			}

			public virtual PlotCommitListTest.CommitListAssert LanePos(int pos)
			{
				PlotLane lane = this.current.GetLane();
				NUnit.Framework.Assert.AreEqual(pos, lane.GetPosition(), "Position of lane of commit #"
					 + (this.nextIndex - 1) + " not as expected.");
				return this;
			}

			public virtual PlotCommitListTest.CommitListAssert Parents(params RevCommit[] parents
				)
			{
				NUnit.Framework.Assert.AreEqual(parents.Length, this.current.ParentCount, "Number of parents of commit #"
					 + (this.nextIndex - 1) + " not as expected.");
				for (int i = 0; i < parents.Length; i++)
				{
					NUnit.Framework.Assert.AreEqual(parents[i], this.current.GetParent(i), "Unexpected parent of commit #"
						 + (this.nextIndex - 1));
				}
				return this;
			}

			public virtual PlotCommitListTest.CommitListAssert NoMoreCommits()
			{
				NUnit.Framework.Assert.AreEqual(this.nextIndex, this.pcl.Count, "Unexpected size of list"
					);
				return this;
			}

			private readonly PlotCommitListTest _enclosing;
		}

		/// <exception cref="System.Exception"></exception>
		[NUnit.Framework.Test]
		public virtual void TestLinear()
		{
			RevCommit a = Commit();
			RevCommit b = Commit(a);
			RevCommit c = Commit(b);
			PlotWalk pw = new PlotWalk(db);
			pw.MarkStart(pw.LookupCommit(c.Id));
			PlotCommitList<PlotLane> pcl = new PlotCommitList<PlotLane>();
			pcl.Source(pw);
			pcl.FillTo(int.MaxValue);
			PlotCommitListTest.CommitListAssert test = new PlotCommitListTest.CommitListAssert
				(this, pcl);
			test.Commit(c).LanePos(0).Parents(b);
			test.Commit(b).LanePos(0).Parents(a);
			test.Commit(a).LanePos(0).Parents();
			test.NoMoreCommits();
		}

		/// <exception cref="System.Exception"></exception>
		[NUnit.Framework.Test]
		public virtual void TestMerged()
		{
			RevCommit a = Commit();
			RevCommit b = Commit(a);
			RevCommit c = Commit(a);
			RevCommit d = Commit(b, c);
			PlotWalk pw = new PlotWalk(db);
			pw.MarkStart(pw.LookupCommit(d.Id));
			PlotCommitList<PlotLane> pcl = new PlotCommitList<PlotLane>();
			pcl.Source(pw);
			pcl.FillTo(int.MaxValue);
			PlotCommitListTest.CommitListAssert test = new PlotCommitListTest.CommitListAssert
				(this, pcl);
			test.Commit(d).LanePos(0).Parents(b, c);
			test.Commit(c).LanePos(0).Parents(a);
			test.Commit(b).LanePos(1).Parents(a);
			test.Commit(a).LanePos(0).Parents();
			test.NoMoreCommits();
		}

		/// <exception cref="System.Exception"></exception>
		[NUnit.Framework.Test]
		public virtual void TestSideBranch()
		{
			RevCommit a = Commit();
			RevCommit b = Commit(a);
			RevCommit c = Commit(a);
			PlotWalk pw = new PlotWalk(db);
			pw.MarkStart(pw.LookupCommit(b.Id));
			pw.MarkStart(pw.LookupCommit(c.Id));
			PlotCommitList<PlotLane> pcl = new PlotCommitList<PlotLane>();
			pcl.Source(pw);
			pcl.FillTo(int.MaxValue);
			PlotCommitListTest.CommitListAssert test = new PlotCommitListTest.CommitListAssert
				(this, pcl);
			test.Commit(c).LanePos(0).Parents(a);
			test.Commit(b).LanePos(1).Parents(a);
			test.Commit(a).LanePos(0).Parents();
			test.NoMoreCommits();
		}

		/// <exception cref="System.Exception"></exception>
		[NUnit.Framework.Test]
		public virtual void Test2SideBranches()
		{
			RevCommit a = Commit();
			RevCommit b = Commit(a);
			RevCommit c = Commit(a);
			RevCommit d = Commit(a);
			PlotWalk pw = new PlotWalk(db);
			pw.MarkStart(pw.LookupCommit(b.Id));
			pw.MarkStart(pw.LookupCommit(c.Id));
			pw.MarkStart(pw.LookupCommit(d.Id));
			PlotCommitList<PlotLane> pcl = new PlotCommitList<PlotLane>();
			pcl.Source(pw);
			pcl.FillTo(int.MaxValue);
			PlotCommitListTest.CommitListAssert test = new PlotCommitListTest.CommitListAssert
				(this, pcl);
			test.Commit(d).LanePos(0).Parents(a);
			test.Commit(c).LanePos(1).Parents(a);
			test.Commit(b).LanePos(1).Parents(a);
			test.Commit(a).LanePos(0).Parents();
			test.NoMoreCommits();
		}

		/// <exception cref="System.Exception"></exception>
		[NUnit.Framework.Test]
		public virtual void TestBug300282_1()
		{
			RevCommit a = Commit();
			RevCommit b = Commit(a);
			RevCommit c = Commit(a);
			RevCommit d = Commit(a);
			RevCommit e = Commit(a);
			RevCommit f = Commit(a);
			RevCommit g = Commit(f);
			PlotWalk pw = new PlotWalk(db);
			// TODO: when we add unnecessary commit's as tips (e.g. a commit which
			// is a parent of another tip) the walk will return those commits twice.
			// Find out why!
			// pw.markStart(pw.lookupCommit(a.getId()));
			pw.MarkStart(pw.LookupCommit(b.Id));
			pw.MarkStart(pw.LookupCommit(c.Id));
			pw.MarkStart(pw.LookupCommit(d.Id));
			pw.MarkStart(pw.LookupCommit(e.Id));
			// pw.markStart(pw.lookupCommit(f.getId()));
			pw.MarkStart(pw.LookupCommit(g.Id));
			PlotCommitList<PlotLane> pcl = new PlotCommitList<PlotLane>();
			pcl.Source(pw);
			pcl.FillTo(int.MaxValue);
			PlotCommitListTest.CommitListAssert test = new PlotCommitListTest.CommitListAssert
				(this, pcl);
			test.Commit(g).LanePos(0).Parents(f);
			test.Commit(f).LanePos(0).Parents(a);
			test.Commit(e).LanePos(1).Parents(a);
			test.Commit(d).LanePos(1).Parents(a);
			test.Commit(c).LanePos(1).Parents(a);
			test.Commit(b).LanePos(1).Parents(a);
			test.Commit(a).LanePos(0).Parents();
			test.NoMoreCommits();
		}

		// test the history of the egit project between 9fdaf3c1 and e76ad9170f
		/// <exception cref="System.Exception"></exception>
		[NUnit.Framework.Test]
		public virtual void TestEgitHistory()
		{
			RevCommit merge_fix = Commit();
			RevCommit add_simple = Commit(merge_fix);
			RevCommit remove_unused = Commit(merge_fix);
			RevCommit merge_remove = Commit(add_simple, remove_unused);
			RevCommit resolve_handler = Commit(merge_fix);
			RevCommit clear_repositorycache = Commit(merge_remove);
			RevCommit add_Maven = Commit(clear_repositorycache);
			RevCommit use_remote = Commit(clear_repositorycache);
			RevCommit findToolBar_layout = Commit(clear_repositorycache);
			RevCommit merge_add_Maven = Commit(findToolBar_layout, add_Maven);
			RevCommit update_eclipse_iplog = Commit(merge_add_Maven);
			RevCommit changeset_implementation = Commit(clear_repositorycache);
			RevCommit merge_use_remote = Commit(update_eclipse_iplog, use_remote);
			RevCommit disable_source = Commit(merge_use_remote);
			RevCommit update_eclipse_iplog2 = Commit(merge_use_remote);
			RevCommit merge_disable_source = Commit(update_eclipse_iplog2, disable_source);
			RevCommit merge_changeset_implementation = Commit(merge_disable_source, changeset_implementation
				);
			RevCommit clone_operation = Commit(merge_disable_source, merge_changeset_implementation
				);
			RevCommit update_eclipse = Commit(add_Maven);
			RevCommit merge_resolve_handler = Commit(clone_operation, resolve_handler);
			RevCommit disable_comment = Commit(clone_operation);
			RevCommit merge_disable_comment = Commit(merge_resolve_handler, disable_comment);
			RevCommit fix_broken = Commit(merge_disable_comment);
			RevCommit add_a_clear = Commit(fix_broken);
			RevCommit merge_update_eclipse = Commit(add_a_clear, update_eclipse);
			RevCommit sort_roots = Commit(merge_update_eclipse);
			RevCommit fix_logged_npe = Commit(merge_changeset_implementation);
			RevCommit merge_fixed_logged_npe = Commit(sort_roots, fix_logged_npe);
			PlotWalk pw = new PlotWalk(db);
			pw.MarkStart(pw.LookupCommit(merge_fixed_logged_npe.Id));
			PlotCommitList<PlotLane> pcl = new PlotCommitList<PlotLane>();
			pcl.Source(pw);
			pcl.FillTo(int.MaxValue);
			PlotCommitListTest.CommitListAssert test = new PlotCommitListTest.CommitListAssert
				(this, pcl);
			test.Commit(merge_fixed_logged_npe).Parents(sort_roots, fix_logged_npe).LanePos(0
				);
			test.Commit(fix_logged_npe).Parents(merge_changeset_implementation).LanePos(0);
			test.Commit(sort_roots).Parents(merge_update_eclipse).LanePos(1);
			test.Commit(merge_update_eclipse).Parents(add_a_clear, update_eclipse).LanePos(1);
			test.Commit(add_a_clear).Parents(fix_broken).LanePos(1);
			test.Commit(fix_broken).Parents(merge_disable_comment).LanePos(1);
			test.Commit(merge_disable_comment).Parents(merge_resolve_handler, disable_comment
				).LanePos(1);
			test.Commit(disable_comment).Parents(clone_operation).LanePos(1);
			test.Commit(merge_resolve_handler).Parents(clone_operation, resolve_handler).LanePos
				(2);
			test.Commit(update_eclipse).Parents(add_Maven).LanePos(3);
			test.Commit(clone_operation).Parents(merge_disable_source, merge_changeset_implementation
				).LanePos(1);
			test.Commit(merge_changeset_implementation).Parents(merge_disable_source, changeset_implementation
				).LanePos(0);
			test.Commit(merge_disable_source).Parents(update_eclipse_iplog2, disable_source).
				LanePos(1);
			test.Commit(update_eclipse_iplog2).Parents(merge_use_remote).LanePos(0);
			test.Commit(disable_source).Parents(merge_use_remote).LanePos(1);
			test.Commit(merge_use_remote).Parents(update_eclipse_iplog, use_remote).LanePos(0
				);
			test.Commit(changeset_implementation).Parents(clear_repositorycache).LanePos(2);
			test.Commit(update_eclipse_iplog).Parents(merge_add_Maven).LanePos(0);
			test.Commit(merge_add_Maven).Parents(findToolBar_layout, add_Maven).LanePos(0);
			test.Commit(findToolBar_layout).Parents(clear_repositorycache).LanePos(0);
			test.Commit(use_remote).Parents(clear_repositorycache).LanePos(1);
			test.Commit(add_Maven).Parents(clear_repositorycache).LanePos(3);
			test.Commit(clear_repositorycache).Parents(merge_remove).LanePos(2);
			test.Commit(resolve_handler).Parents(merge_fix).LanePos(4);
			test.Commit(merge_remove).Parents(add_simple, remove_unused).LanePos(2);
			test.Commit(remove_unused).Parents(merge_fix).LanePos(0);
			test.Commit(add_simple).Parents(merge_fix).LanePos(1);
			test.Commit(merge_fix).Parents().LanePos(3);
			test.NoMoreCommits();
		}
	}
}