using JdeScoping.DataAccess.Models;
using SqlKata.Compilers;

namespace JdeScoping.DataAccess.QueryBuilders;

/// <summary>
/// Builds MIS extraction queries for work order step matching.
/// </summary>
public sealed class MisQueryBuilder
{
    private readonly SqlServerCompiler _compiler;

    /// <summary>
    /// Initializes a new instance of MisQueryBuilder.
    /// </summary>
    /// <param name="compiler">The SqlKata SQL Server compiler.</param>
    public MisQueryBuilder(SqlServerCompiler compiler)
    {
        _compiler = compiler;
    }

    /// <summary>
    /// Builds the complete MIS extraction SQL including temp table setup and data population.
    /// </summary>
    /// <param name="model">The search model containing filter criteria.</param>
    /// <returns>The SQL statements for MIS extraction.</returns>
    public IReadOnlyList<string> BuildMisExtractionSql(SearchModel model)
    {
        var statements = new List<string>();

        // Create #TempMisData temp table
        statements.Add(BuildTempMisDataTableSql());

        // Build and execute MIS CTE query to populate temp table
        statements.Add(BuildMisCteSql(model));

        return statements;
    }

    private static string BuildTempMisDataTableSql()
    {
        return """
            IF OBJECT_ID('tempdb.dbo.#TempMisData', 'U') IS NOT NULL
            BEGIN
                DROP TABLE #TempMisData;
            END
            CREATE TABLE #TempMisData (
                WorkOrderNumber BIGINT,
                ItemNumber VARCHAR(25),
                ItemDescription VARCHAR(30),
                BranchCode VARCHAR(12),
                WorkCenterCode VARCHAR(12),
                StepTimestamp DATETIME,
                SequenceNumber DECIMAL(7, 2),
                FunctionCode VARCHAR(15),
                FunctionOperationDescription VARCHAR(80),
                MatchedSequenceNumber DECIMAL(7, 2),
                RoutingMatch BIT,
                MasterMatch BIT,
                MisNumber VARCHAR(32),
                RevID VARCHAR(32),
                CharNumber VARCHAR(32),
                MisSequenceNumber VARCHAR(32),
                TestDescription VARCHAR(2000),
                SamplingType VARCHAR(32),
                SamplingValue VARCHAR(32),
                ToolsGauges VARCHAR(2000),
                WorkInstructions VARCHAR(2000),
                Status VARCHAR(32),
                ReleaseDate DATETIME
            );
            """;
    }

    private string BuildMisCteSql(SearchModel model)
    {
        var joins = BuildMisJoins(model);
        var whereClause = BuildMisWhereClause(model);

        return $"""
            WITH MIS_CTE AS(
                SELECT  DISTINCT wo.WorkOrderNumber,
                        wo.ItemNumber,
                        wo.BranchCode,
                        wo.RoutingType,
                        wo.IssueDate,
                        wos.WorkCenterCode,
                        wos.StepNumber,
                        wos.EndDT,
                        wos.FunctionCode,
                        wos.FunctionOperationDescription
                FROM    dbo.WorkOrderStep AS wos INNER JOIN
                        dbo.WorkOrder AS wo ON (wos.WorkOrderNumber = wo.WorkOrderNumber AND LTRIM(wos.BranchCode) = wo.BranchCode) LEFT OUTER JOIN
                        dbo.WorkOrderTime AS wot ON (wos.WorkOrderNumber = wot.WorkOrderNumber AND LTRIM(wos.BranchCode) = wot.BranchCode AND wos.StepNumber = wot.StepNumber){joins}{whereClause}
            )
            INSERT INTO #TempMISData
            (
                WorkOrderNumber,
                ItemNumber,
                ItemDescription,
                BranchCode,
                WorkCenterCode,
                StepTimestamp,
                SequenceNumber,
                FunctionCode,
                FunctionOperationDescription,
                MatchedSequenceNumber,
                RoutingMatch,
                MasterMatch,
                MisNumber,
                RevID,
                CharNumber,
                MisSequenceNumber,
                TestDescription,
                SamplingType,
                SamplingValue,
                ToolsGauges,
                WorkInstructions,
                Status,
                ReleaseDate
            )
            SELECT mm.WorkOrderNumber,
                   mm.ItemNumber,
                   mm.ItemDescription,
                   mm.BranchCode,
                   mm.WorkCenterCode,
                   mm.StepTimestamp,
                   mm.SequenceNumber,
                   mm.FunctionCode,
                   mm.FunctionOperationDescription,
                   mm.MatchedSequenceNumber,
                   mm.RoutingMatch,
                   mm.MasterMatch,
                   mm.MisNumber,
                   mm.RevID,
                   mm.CharNumber,
                   mm.MisSequenceNumber,
                   mm.TestDescription,
                   mm.SamplingType,
                   mm.SamplingValue,
                   mm.ToolsGauges,
                   mm.WorkInstructions,
                   mm.Status,
                   mm.ReleaseDate
            FROM   MIS_CTE c CROSS APPLY
                   dbo.MatchMIS(c.WorkOrderNumber, c.ItemNumber, c.BranchCode, c.RoutingType,
                                c.IssueDate, c.WorkCenterCode, c.StepNumber, c.EndDT,
                                c.FunctionCode, c.FunctionOperationDescription) AS mm;
            """;
    }

    private static string BuildMisJoins(SearchModel model)
    {
        var joins = new List<string>();

        if (model.ItemNumberFilterEnabled)
        {
            joins.Add(" INNER JOIN\r\n            #P_ItemNumbers p_in ON (wo.ItemNumber = p_in.ItemNumber)");
        }

        if (model.ProfitCenterFilterEnabled || model.WorkCenterFilterEnabled)
        {
            joins.Add(" INNER JOIN \r\n            #P_WorkCenters p_wc ON (wos.WorkCenterCode = p_wc.Code)");
        }

        if (model.OperatorFilterEnabled)
        {
            joins.Add(" INNER JOIN \r\n            #P_OperatorIDs p_oi ON (wot.AddressNumber = p_oi.AddressNumber)");
        }

        return string.Join("", joins);
    }

    private static string BuildMisWhereClause(SearchModel model)
    {
        if (model.MinimumDt.HasValue && model.MaximumDt.HasValue)
        {
            return """

                WHERE  (((wos.EndDT <= @p_MaximumDT) AND (wos.EndDT >= @p_MinimumDT)) OR
                        ((wot.GlDate <= @p_MaximumDT) AND (wot.GlDate >= @p_MinimumDT)))
            """;
        }

        if (model.MinimumDt.HasValue && !model.MaximumDt.HasValue)
        {
            return """

                       WHERE  (wos.EndDT >= @p_MinimumDT OR wot.GlDate >= @p_MinimumDT)
                   """;
        }

        if (!model.MinimumDt.HasValue && model.MaximumDt.HasValue)
        {
            return """

                       WHERE  (wos.EndDT <= @p_MaximumDT OR wot.GlDate <= @p_MaximumDT)
                   """;
        }

        return "";
    }
}