using System;
using System.Collections.Generic;
using Moq;
using Xunit;
using LCU.API.Collections.CollectionsApi.Services;
using LCU.API.Collections.CollectionsApi.Exceptions;
using System.Threading.Tasks;
using LCU.API.Collections.CollectionsApi.Dao;
using LCU.API.Collections.CollectionsApiLib.Models;

namespace LCU.API.Collections.CollectionsApiTests.ServiceTests
{
    public class CaseServiceTest
    {
        private Mock<ITemenosCaseDao> _mockTemenosCaseDao;
        private CaseService _caseService;

        public CaseServiceTest()
        {
            _mockTemenosCaseDao = new Mock<ITemenosCaseDao>();
            _caseService = new CaseService( _mockTemenosCaseDao.Object);
        }

        [Fact]
        public async void GetCaseByID_OK()
        {
            //setup
            _mockTemenosCaseDao.Setup(dao => dao.FindByIdAsync(It.IsAny<int>())).ReturnsAsync(
                new CollectionsApiLib.Models.TemenosCase()
                {
                  CaseId = 1234,
                  CaseTitle = "Case"
                }
            );

            var result = await _caseService.GetCaseByIdAsync(1234);

            Assert.NotNull(result);
            Assert.Equal(1234, result.CaseId);
        }

        [Fact]
        public async void GetCaseByID_Server_Exception()
        {
            //setup
            _mockTemenosCaseDao.Setup(dao => dao.FindByIdAsync(It.IsAny<int>())).ThrowsAsync(new Exception("Oops"));
            
            var result = await Assert.ThrowsAsync<ServerErrorException>(() => _caseService.GetCaseByIdAsync(1234));

            Assert.NotNull(result);
        }

        [Fact]
        public async void GetCaseByID_NotFound()
        {
            //setup
            _mockTemenosCaseDao.Setup(dao => dao.FindByIdAsync(It.IsAny<int>())).Returns(Task.FromResult<CollectionsApiLib.Models.TemenosCase>(null));

            var result = await Assert.ThrowsAsync<NotFoundException>(() => _caseService.GetCaseByIdAsync(123));

            Assert.NotNull(result);
            Assert.Equal("Case with id 123 not found.", result.Message);
        }

        [Fact]
        public async void GetCaseByNO_OK()
        {
            //setup
            _mockTemenosCaseDao.Setup(dao => dao.FindByCaseNoAsync(It.IsAny<string>())).ReturnsAsync(
                new CollectionsApiLib.Models.TemenosCase()
                {
                    CaseId = 1234,
                    CaseNumber = "12345",
                    CaseTitle = "Case"
                }
            );
            
            var result = await _caseService.GetCaseByCaseNoAsync("1234");

            Assert.NotNull(result);
            Assert.Equal(1234, result.CaseId);
        }

        [Fact]
        public async void GetCaseByNo_Server_Exception()
        {
            //setup
            _mockTemenosCaseDao.Setup(dao => dao.FindByCaseNoAsync(It.IsAny<string>())).ThrowsAsync(new Exception("Oops"));

            var result = await Assert.ThrowsAsync<ServerErrorException>(() => _caseService.GetCaseByCaseNoAsync("12345"));

            Assert.NotNull(result);
        }

        [Fact]
        public async void GetCaseByNO_NotFound()
        {
            //setup
            _mockTemenosCaseDao.Setup(dao => dao.FindByCaseNoAsync(It.IsAny<string>())).Returns(Task.FromResult<CollectionsApiLib.Models.TemenosCase>(null));
            
            var result = await Assert.ThrowsAsync<NotFoundException>(() => _caseService.GetCaseByCaseNoAsync("1234"));

            Assert.NotNull(result);
            Assert.Equal("Case with case no 1234 not found.", result.Message);
        }
                
        [Fact]
        public async void GetHistory_OK()
        {
            const int caseId = 111;
            //setup
            _mockTemenosCaseDao.Setup(dao => dao.FindCommentsAsync(caseId)).ReturnsAsync(
                new List<TemenosHistory>()
                {
                    new TemenosHistory()
                    {
                        Created = DateTime.Now,
                        Message = "Comment",
                        
                        Type = HistoryType.Comment,
                        UserId = 10
                    }
                }
            );
            
            var result = await _caseService.GetHistoryByAccountIdAsync(caseId);

            Assert.NotNull(result);
            Assert.Equal(1,  result.Count);
        }
    }
}