using JdeScoping.DataAccess.FilterHandlers;
using JdeScoping.DataAccess.Interfaces;
using JdeScoping.DataAccess.Models;
using JdeScoping.DataAccess.Models.FilterEntries;
using JdeScoping.DataAccess.QueryBuilders;
using NSubstitute;
using Shouldly;
using SqlKata.Compilers;
using Xunit;

namespace JdeScoping.DataAccess.Tests.QueryBuilders;

/// <summary>
/// Unit tests for SqlKataSearchQueryBuilder.
/// </summary>
public sealed class SqlKataSearchQueryBuilderTests
{
    private readonly SqlServerCompiler _compiler = new();

    [Fact]
    public void BuildSearchQuery_WithEmptyFilters_ProducesMinimalQuery()
    {
        // Arrange
        var handlers = Array.Empty<IFilterHandler>();
        var builder = new SqlKataSearchQueryBuilder(_compiler, handlers);
        var model = new SearchModel();

        // Act
        var result = builder.BuildSearchQuery(model);

        // Assert
        result.ShouldNotBeNull();
        result.Sql.ShouldNotBeNullOrEmpty();
        result.TempTableSetupSql.ShouldNotBeEmpty();

        // Should contain temp table creation
        var setupSql = string.Join("\n", result.TempTableSetupSql);
        setupSql.ShouldContain("#Temp_WO");
        setupSql.ShouldContain("CREATE TABLE");
    }

    [Fact]
    public void BuildSearchQuery_WithEmptyFilters_ResultSqlContainsSelect()
    {
        // Arrange
        var handlers = Array.Empty<IFilterHandler>();
        var builder = new SqlKataSearchQueryBuilder(_compiler, handlers);
        var model = new SearchModel();

        // Act
        var result = builder.BuildSearchQuery(model);

        // Assert
        result.Sql.ShouldContain("SELECT");
    }

    [Fact]
    public void BuildSearchQuery_WithSingleFilter_ProducesCorrectStructure()
    {
        // Arrange
        var workOrderHandler = new WorkOrderFilterHandler();
        var handlers = new IFilterHandler[] { workOrderHandler };
        var builder = new SqlKataSearchQueryBuilder(_compiler, handlers);
        var model = new SearchModel
        {
            WorkOrderFilter =
            [
                new WorkOrderFilterEntry { WorkOrderNumber = 12345 }
            ]
        };

        // Act
        var result = builder.BuildSearchQuery(model);

        // Assert
        result.ShouldNotBeNull();
        result.TempTableSetupSql.ShouldNotBeEmpty();
        result.Parameters.ShouldContainKey("p_WorkOrderFilter");

        var setupSql = string.Join("\n", result.TempTableSetupSql);
        // Should have temp table creation and work order merge
        setupSql.ShouldContain("#Temp_WO");
        setupSql.ShouldContain("MERGE");
    }

    [Fact]
    public void BuildSearchQuery_WithMultipleFilters_CombinesCorrectly()
    {
        // Arrange
        var workOrderHandler = new WorkOrderFilterHandler();
        var itemNumberHandler = new ItemNumberFilterHandler();
        var handlers = new IFilterHandler[] { workOrderHandler, itemNumberHandler };
        var builder = new SqlKataSearchQueryBuilder(_compiler, handlers);
        var model = new SearchModel
        {
            WorkOrderFilter =
            [
                new WorkOrderFilterEntry { WorkOrderNumber = 12345 }
            ],
            ItemNumberFilter =
            [
                new ItemNumberFilterEntry { ItemNumber = "ABC123" }
            ]
        };

        // Act
        var result = builder.BuildSearchQuery(model);

        // Assert
        result.ShouldNotBeNull();
        result.Parameters.ShouldContainKey("p_WorkOrderFilter");
        result.Parameters.ShouldContainKey("p_ItemNumberFilter");

        var setupSql = string.Join("\n", result.TempTableSetupSql);
        setupSql.ShouldContain("#Temp_WO");
        setupSql.ShouldContain("#P_ItemNumbers");
    }

    [Fact]
    public void BuildSearchQuery_HandlersAreAppliedInPriorityOrder()
    {
        // Arrange
        var lowPriorityHandler = Substitute.For<IFilterHandler>();
        lowPriorityHandler.Priority.Returns(100);
        lowPriorityHandler.IsEnabled(Arg.Any<SearchModel>()).Returns(true);
        lowPriorityHandler.Apply(Arg.Any<SearchModel>(), Arg.Any<SqlServerCompiler>())
            .Returns(new FilterResult(["-- LOW PRIORITY SQL"], new Dictionary<string, object>()));

        var highPriorityHandler = Substitute.For<IFilterHandler>();
        highPriorityHandler.Priority.Returns(1);
        highPriorityHandler.IsEnabled(Arg.Any<SearchModel>()).Returns(true);
        highPriorityHandler.Apply(Arg.Any<SearchModel>(), Arg.Any<SqlServerCompiler>())
            .Returns(new FilterResult(["-- HIGH PRIORITY SQL"], new Dictionary<string, object>()));

        // Pass handlers in reverse priority order to verify sorting
        var handlers = new[] { lowPriorityHandler, highPriorityHandler };
        var builder = new SqlKataSearchQueryBuilder(_compiler, handlers);
        var model = new SearchModel();

        // Act
        var result = builder.BuildSearchQuery(model);

        // Assert
        var setupSql = string.Join("\n", result.TempTableSetupSql);
        var highIndex = setupSql.IndexOf("-- HIGH PRIORITY SQL", StringComparison.Ordinal);
        var lowIndex = setupSql.IndexOf("-- LOW PRIORITY SQL", StringComparison.Ordinal);

        highIndex.ShouldBeGreaterThan(-1);
        lowIndex.ShouldBeGreaterThan(-1);
        highIndex.ShouldBeLessThan(lowIndex);
    }

    [Fact]
    public void BuildSearchQuery_DisabledHandlersAreSkipped()
    {
        // Arrange
        var enabledHandler = Substitute.For<IFilterHandler>();
        enabledHandler.Priority.Returns(1);
        enabledHandler.IsEnabled(Arg.Any<SearchModel>()).Returns(true);
        enabledHandler.Apply(Arg.Any<SearchModel>(), Arg.Any<SqlServerCompiler>())
            .Returns(new FilterResult(["-- ENABLED"], new Dictionary<string, object>()));

        var disabledHandler = Substitute.For<IFilterHandler>();
        disabledHandler.Priority.Returns(2);
        disabledHandler.IsEnabled(Arg.Any<SearchModel>()).Returns(false);

        var handlers = new[] { enabledHandler, disabledHandler };
        var builder = new SqlKataSearchQueryBuilder(_compiler, handlers);
        var model = new SearchModel();

        // Act
        var result = builder.BuildSearchQuery(model);

        // Assert
        var setupSql = string.Join("\n", result.TempTableSetupSql);
        setupSql.ShouldContain("-- ENABLED");

        // Apply should never be called on disabled handler
        disabledHandler.DidNotReceive().Apply(Arg.Any<SearchModel>(), Arg.Any<SqlServerCompiler>());
    }

    [Fact]
    public void BuildSearchQuery_WithTimespanFilter_IncludesStepFlagging()
    {
        // Arrange
        var handlers = Array.Empty<IFilterHandler>();
        var builder = new SqlKataSearchQueryBuilder(_compiler, handlers);
        var model = new SearchModel
        {
            MinimumDt = DateTime.Now.AddDays(-30),
            MaximumDt = DateTime.Now
        };

        // Act
        var result = builder.BuildSearchQuery(model);

        // Assert
        // When ShouldSearchSteps returns true, step flagging query is added
        var setupSql = string.Join("\n", result.TempTableSetupSql);
        setupSql.ShouldContain("LU_WO");
        setupSql.ShouldContain("Flagged");
    }

    [Fact]
    public void BuildMisQuery_ReturnsValidResult()
    {
        // Arrange
        var handlers = Array.Empty<IFilterHandler>();
        var builder = new SqlKataSearchQueryBuilder(_compiler, handlers);
        var model = new SearchModel();

        // Act
        var result = builder.BuildMisQuery(model);

        // Assert
        result.ShouldNotBeNull();
        result.Sql.ShouldNotBeNullOrEmpty();
        result.Sql.ShouldContain("#TempMisData");
    }

    [Fact]
    public void BuildMisNonMatchQuery_ReturnsValidResult()
    {
        // Arrange
        var handlers = Array.Empty<IFilterHandler>();
        var builder = new SqlKataSearchQueryBuilder(_compiler, handlers);
        var model = new SearchModel();

        // Act
        var result = builder.BuildMisNonMatchQuery(model);

        // Assert
        result.ShouldNotBeNull();
        result.Sql.ShouldNotBeNullOrEmpty();
        result.Sql.ShouldContain("WasJobStepAdded");
        result.Sql.ShouldContain("MatchedJobStepNumber");
    }
}