// Copyright (C) Stichting Deltares 2018. All rights reserved.
//
// This file is part of the application DAM - UI.
//
// DAM - UI is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
// All names, logos, and references to "Deltares" are registered trademarks of
// Stichting Deltares and remain full property of Stichting Deltares at all times.
// All rights reserved.

using System.Collections.Generic;
using System.IO;
using Deltares.Dam.Data;
using NUnit.Framework;

namespace Deltares.Dam.Tests
{
    [TestFixture]
    public class CsvExporterTest
    {
        const string FileName = "test.csv";

        [Test]
        [ExpectedException(typeof(CsvExporterException))]
        public void ThrowWhenFileNameIsNull()
        {
            new CsvExporter<CsvExportData>(null, null);
        }

        [Test]
        [ExpectedException(typeof(CsvExporterException))]
        public void ThrowWhenFileNameIsNullOrEmpty()
        {
            new CsvExporter<CsvExportData>("", null);
        }

        [Test]
        [ExpectedException(typeof(CsvExporterException))]
        public void ThrowWhenFileNameOnlyContainsWhitespaces()
        {
            new CsvExporter<CsvExportData>(" ", null);
        }

        [Test]
        public void OverwriteExistingFileShouldWorkWithoutException()
        {
            const string writtenContent = "something";
            var file = File.CreateText(FileName);
            file.WriteLine(writtenContent);
            file.Close();
            var exportData = new CsvExportData("locatioName", "scenarioName");
            var creator = new CsvExporter<CsvExportData>(FileName, new List<CsvExportData> { exportData });
            creator.WriteFile();
            using (var reader = File.OpenText(FileName))
            {
                var fileContent = reader.ReadToEnd();
                Assert.IsFalse(fileContent.Contains((writtenContent)));
            }
        }

        [Test]
        [ExpectedException(typeof(CsvExporterException))]
        public void ThrowsIndexAlreadyExistsWhenDeclaredMultipleTimes()
        {
            var creator = new CsvExporter<DataStubWithWrongMetaData>(FileName, 
                new List<DataStubWithWrongMetaData> { new DataStubWithWrongMetaData() });
            creator.WriteFile();
        }

        [Test]
        public void ColumnHeaderIsWrittenCorrectly()
        {
            var dataItems = new List<DataStub>
                            {
                                new DataStub() { ID = 1, Name = "Barry", Average = 95.4 },
                                new DataStub() { ID = 2, Name = "Tom", Average = 97.3 },
                                new DataStub() { ID = 3, Name = "Remko", Average = 92.2}
                            };

            var creator = new CsvExporter<DataStub>(FileName, dataItems)
                              {
                                  WriteHeaderInFirstLine = true
                              };
            
            creator.WriteFile();

            using (var reader = File.OpenText(FileName))
            {
                var fileContent = reader.ReadToEnd();
                Assert.IsTrue(fileContent.Contains("ID;Naam"));
            }

        }

        class DataStub
        {
            [CsvExportColumn("ID", 1)]
            public int ID { get; set; }

            [CsvExportColumn("Naam", 2)]
            public string Name { get; set; }

            [CsvExportColumn("Gemiddelde", 3)]
            public double Average { get; set; }
        }

        class DataStubWithWrongMetaData
        {
            [CsvExportColumn("ID", 1)]
            public int ID { get; set; }

            [CsvExportColumn("Naam", 1)]
            public string Name { get; set; }
        }
    }
}