using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using NUnit.Framework;


namespace Pithos.Core.Test
{
    [TestFixture]
    public class WorkflowFileStatusTest
    {
        private MockSettings _settings;
        private MockStatusChecker _statusChecker;

        [SetUp]
        public void SetUp()
        {
            _settings = new MockSettings
            {
                PithosPath = @"e:\Pithos",
                IconsPath = @"C:\Program Files\Common Files\TortoiseOverlays\icons\XPStyle"
            };
            _statusChecker = new MockStatusChecker { Settings = _settings };
        }

        [Test]
        public void TestSetFileStatusCreated()
        {
            PithosWorkflow workflow = new PithosWorkflow { Settings = _settings, StatusKeeper = _statusChecker };

            var path = @"e:\pithos\0File1.txt";
            workflow.SetFileStatus(path, FileStatus.Created);
            var status = _statusChecker.GetFileStatus(path);
            Assert.AreEqual(FileStatus.Created, status);

        }

        [Test]
        public void TestSetFileStatusCreatedTransitions()
        {
            IPithosWorkflow workflow = new PithosWorkflow { Settings = _settings, StatusKeeper = _statusChecker };

            var path = @"e:\pithos\0File1.txt";

            var initialStatus = FileStatus.Created;
            FileStatus[,] transitions = { { FileStatus.Modified, FileStatus.Created },
                                            { FileStatus.Created, FileStatus.Created },
                                            { FileStatus.Deleted, FileStatus.Deleted },
                                            { FileStatus.Renamed, FileStatus.Renamed },
                                            { FileStatus.Unchanged, FileStatus.Unchanged },
                                        };


            TestTransitions(transitions, workflow, path, initialStatus);
        }

        [Test]
        public void TestSetFileStatusModifiedTransitions()
        {
            IPithosWorkflow workflow = new PithosWorkflow { Settings = _settings, StatusKeeper = _statusChecker };

            var path = @"e:\pithos\0File1.txt";

            var initialStatus = FileStatus.Modified;
            FileStatus[,] transitions = { { FileStatus.Modified, FileStatus.Modified },
                                            { FileStatus.Created, FileStatus.Modified },
                                            { FileStatus.Deleted, FileStatus.Deleted },
                                            { FileStatus.Renamed, FileStatus.Renamed },
                                            { FileStatus.Unchanged, FileStatus.Unchanged },
                                        };


            TestTransitions(transitions, workflow, path, initialStatus);
        }

        [Test]
        public void TestSetFileStatusUnchangedTransitions()
        {
            IPithosWorkflow workflow = new PithosWorkflow { Settings = _settings, StatusKeeper = _statusChecker };

            var path = @"e:\pithos\0File1.txt";

            var initialStatus = FileStatus.Unchanged;
            FileStatus[,] transitions = { { FileStatus.Modified, FileStatus.Modified },
                                            { FileStatus.Created, FileStatus.Created },
                                            { FileStatus.Deleted, FileStatus.Deleted },
                                            { FileStatus.Renamed, FileStatus.Renamed },
                                            { FileStatus.Unchanged, FileStatus.Unchanged },
                                        };


            TestTransitions(transitions, workflow, path, initialStatus);
        }

        [Test]
        public void TestSetFileStatusDeletedTransitions()
        {
            IPithosWorkflow workflow = new PithosWorkflow { Settings = _settings, StatusKeeper = _statusChecker };

            var path = @"e:\pithos\0File1.txt";

            var initialStatus = FileStatus.Deleted;
            FileStatus[,] transitions = { { FileStatus.Modified, FileStatus.Deleted },
                                            { FileStatus.Created, FileStatus.Deleted },
                                            { FileStatus.Deleted, FileStatus.Deleted },
                                            { FileStatus.Renamed, FileStatus.Deleted },
                                            { FileStatus.Unchanged, FileStatus.Deleted },
                                        };


            TestTransitions(transitions, workflow, path, initialStatus);
        }

        [Test]
        public void TestSetFileStatusRenamedTransitions()
        {
            IPithosWorkflow workflow = new PithosWorkflow { Settings = _settings, StatusKeeper = _statusChecker };

            var path = @"e:\pithos\0File1.txt";

            var initialStatus = FileStatus.Renamed;
            FileStatus[,] transitions = { { FileStatus.Modified, FileStatus.Modified },
                                            { FileStatus.Created, FileStatus.Renamed },
                                            { FileStatus.Deleted, FileStatus.Deleted },
                                            { FileStatus.Renamed, FileStatus.Renamed },
                                            { FileStatus.Unchanged, FileStatus.Unchanged },
                                        };


            TestTransitions(transitions, workflow, path, initialStatus);
        }

        private void TestTransitions(FileStatus[,] transitions, IPithosWorkflow workflow, string path, FileStatus initialStatus)
        {
            workflow.SetFileStatus(path, initialStatus);
            var status = _statusChecker.GetFileStatus(path);
            Assert.AreEqual(initialStatus, status, "Setting new file to {0}", status);
            for (int i = 0; i < transitions.GetLength(0); i++)
            {
                workflow.ClearFileStatus(path);
                status = _statusChecker.GetFileStatus(path);
                Assert.AreEqual(FileStatus.Missing, status, "Clear status");

                workflow.SetFileStatus(path, initialStatus);

                var transition = transitions[i, 0];
                var result = transitions[i, 1];
                workflow.SetFileStatus(path, transition);
                status = _statusChecker.GetFileStatus(path);
                Assert.AreEqual(result, status, "Marking {0} as {1}", initialStatus, transition);

            }
        }
    }
}