using ECMJobRunner.Application.Behaviors;
using ECMJobRunner.Application.Common.Constants;
using ECMJobRunner.Application.Common.Dtos;
using ECMJobRunner.Application.Common.Exceptions;
using ECMJobRunner.Application.Common.Interfaces;
using ECMJobRunner.Application.Common.Options;
using ECMJobRunner.Application.DEXJob.Commands;
using ECMJobRunner.Domain.Entities;
using FluentAssertions;
using MediatR;
using Microsoft.Extensions.Options;
using Moq;
using System;
using System.Threading;
using System.Threading.Tasks;
using Xunit;

namespace ECMJobRunner.Tests.Application
{
    public class CheckQueryExecutionBehaviorTests
    {
        private readonly Mock<ISQLExecutor> _mockExecutor;
        private readonly Mock<IOptions<DexJobOptions>> _mockOptions;
        private readonly CheckQueryExecutionBehavior<TriggeringDEXJobCommand, Unit> _behavior;
        private readonly Mock<RequestHandlerDelegate<Unit>> _mockNext;

        public CheckQueryExecutionBehaviorTests()
        {
            _mockExecutor = new Mock<ISQLExecutor>();
            _mockOptions = new Mock<IOptions<DexJobOptions>>();
            _mockOptions.Setup(o => o.Value).Returns(new DexJobOptions());
            _behavior = new CheckQueryExecutionBehavior<TriggeringDEXJobCommand, Unit>(_mockExecutor.Object, _mockOptions.Object);
            _mockNext = new Mock<RequestHandlerDelegate<Unit>>();
            _mockNext.Setup(n => n()).ReturnsAsync(Unit.Value);
        }

        [Fact]
        public async Task Handle_WithValidCheckQuery_ExecutesSuccessfully()
        {
            // Arrange
            var command = new TriggeringDEXJobCommand
            {
                Job = new ProfileSqlJob { SqlCheckQuery = "SELECT COUNT(*) AS [Return Value] FROM Table" },
                BatchId = "20260711143025123456"
            };

            _mockExecutor
                .Setup(e => e.ExecuteQueryAsync<CheckQueryResult>(It.IsAny<string>(), It.IsAny<CancellationToken>()))
                .ReturnsAsync(new CheckQueryResult { ReturnValue = 5 });

            // Act
#if NET48
            var result = await _behavior.Handle(command, CancellationToken.None, _mockNext.Object);
#else
            var result = await _behavior.Handle(command, _mockNext.Object, CancellationToken.None);
#endif

            // Assert
            result.Should().Be(Unit.Value);
            _mockExecutor.Verify(e => e.ExecuteQueryAsync<CheckQueryResult>(It.IsAny<string>(), It.IsAny<CancellationToken>()), Times.Once);
            _mockNext.Verify(n => n(), Times.Once);
        }

        [Theory]
        [InlineData(1)]
        [InlineData(10)]
        [InlineData(100)]
        public async Task Handle_WithPositiveReturnValue_DoesNotThrow(int returnValue)
        {
            // Arrange
            var command = new TriggeringDEXJobCommand
            {
                Job = new ProfileSqlJob { SqlCheckQuery = "SELECT COUNT(*) AS [Return Value] FROM Table" },
                BatchId = "20260711143025123456"
            };

            _mockExecutor
                .Setup(e => e.ExecuteQueryAsync<CheckQueryResult>(It.IsAny<string>(), It.IsAny<CancellationToken>()))
                .ReturnsAsync(new CheckQueryResult { ReturnValue = returnValue });

            // Act
#if NET48
            Func<Task> act = async () => await _behavior.Handle(command, CancellationToken.None, _mockNext.Object);
#else
            Func<Task> act = async () => await _behavior.Handle(command, _mockNext.Object, CancellationToken.None);
#endif

            // Assert
            await act.Should().NotThrowAsync();
        }

        [Theory]
        [InlineData(0)]
        [InlineData(-1)]
        [InlineData(-10)]
        public async Task Handle_WithZeroOrNegativeReturnValue_ThrowsDEXJobException(int returnValue)
        {
            // Arrange
            var command = new TriggeringDEXJobCommand
            {
                Job = new ProfileSqlJob { SqlCheckQuery = "SELECT COUNT(*) AS [Return Value] FROM Table" },
                BatchId = "20260711143025123456"
            };

            _mockExecutor
                .Setup(e => e.ExecuteQueryAsync<CheckQueryResult>(It.IsAny<string>(), It.IsAny<CancellationToken>()))
                .ReturnsAsync(new CheckQueryResult { ReturnValue = returnValue });

            // Act
#if NET48
            Func<Task> act = async () => await _behavior.Handle(command, CancellationToken.None, _mockNext.Object);
#else
            Func<Task> act = async () => await _behavior.Handle(command, _mockNext.Object, CancellationToken.None);
#endif

            // Assert
            await act.Should().ThrowAsync<JobException>()
                .WithMessage($"*unexpectedly returned the value {returnValue}*");
        }

        [Fact]
        public async Task Handle_WithNullCheckQuery_IgnoresByDefault()
        {
            // Arrange
            var command = new TriggeringDEXJobCommand
            {
                Job = new ProfileSqlJob { SqlCheckQuery = null },
                BatchId = "20260711143025123456"
            };

            // Act
#if NET48
            var result = await _behavior.Handle(command, CancellationToken.None, _mockNext.Object);
#else
            var result = await _behavior.Handle(command, _mockNext.Object, CancellationToken.None);
#endif

            // Assert
            result.Should().Be(Unit.Value);
            _mockExecutor.Verify(e => e.ExecuteQueryAsync<CheckQueryResult>(It.IsAny<string>(), It.IsAny<CancellationToken>()), Times.Never);
            _mockNext.Verify(n => n(), Times.Once);
        }

        [Fact]
        public async Task Handle_WithNullCheckQueryAndStopOption_ThrowsDEXJobException()
        {
            // Arrange
            var options = new DexJobOptions
            {
                Error = new DexJobOptions.DexJobErrorHandlingOptions
                {
                    CheckQuery = new DexJobOptions.DexJobErrorHandlingOptions.SqlQueryErrorHandlingOptions
                    {
                        IfNullOrWhiteSpace = ErrorAction.Stop
                    }
                }
            };
            _mockOptions.Setup(o => o.Value).Returns(options);

            var behavior = new CheckQueryExecutionBehavior<TriggeringDEXJobCommand, Unit>(_mockExecutor.Object, _mockOptions.Object);
            var command = new TriggeringDEXJobCommand
            {
                Job = new ProfileSqlJob { SqlCheckQuery = null },
                BatchId = "20260711143025123456"
            };

            // Act
#if NET48
            Func<Task> act = async () => await behavior.Handle(command, CancellationToken.None, _mockNext.Object);
#else
            Func<Task> act = async () => await behavior.Handle(command, _mockNext.Object, CancellationToken.None);
#endif

            // Assert
            await act.Should().ThrowAsync<JobException>()
                .WithMessage("*SQL Check Query is null or empty*");
        }

        [Fact]
        public async Task Handle_WithBatchIdPlaceholder_ReplacesCorrectly()
        {
            // Arrange
            var batchId = "20260711143025123456";
            var command = new TriggeringDEXJobCommand
            {
                Job = new ProfileSqlJob { SqlCheckQuery = "SELECT COUNT(*) AS [Return Value] FROM Table WHERE BatchId = '#INT#BATCH_ID'" },
                BatchId = batchId
            };

            string? capturedSql = null;
            _mockExecutor
                .Setup(e => e.ExecuteQueryAsync<CheckQueryResult>(It.IsAny<string>(), It.IsAny<CancellationToken>()))
                .Callback<string, CancellationToken>((sql, _) => capturedSql = sql)
                .ReturnsAsync(new CheckQueryResult { ReturnValue = 1 });

            // Act
#if NET48
            await _behavior.Handle(command, CancellationToken.None, _mockNext.Object);
#else
            await _behavior.Handle(command, _mockNext.Object, CancellationToken.None);
#endif

            // Assert
            capturedSql.Should().Contain(batchId);
            capturedSql.Should().NotContain("#INT#BATCH_ID");
        }

        [Fact]
        public async Task Handle_WithNullResult_ThrowsDEXJobException()
        {
            // Arrange
            var command = new TriggeringDEXJobCommand
            {
                Job = new ProfileSqlJob { SqlCheckQuery = "SELECT COUNT(*) AS [Return Value] FROM Table" },
                BatchId = "20260711143025123456"
            };

            _mockExecutor
                .Setup(e => e.ExecuteQueryAsync<CheckQueryResult>(It.IsAny<string>(), It.IsAny<CancellationToken>()))
                .ReturnsAsync((CheckQueryResult?)null);

            // Act
#if NET48
            Func<Task> act = async () => await _behavior.Handle(command, CancellationToken.None, _mockNext.Object);
#else
            Func<Task> act = async () => await _behavior.Handle(command, _mockNext.Object, CancellationToken.None);
#endif

            // Assert
            await act.Should().ThrowAsync<JobException>()
                .WithMessage("*Check Query returned nothing*");
        }
    }
}