using System.Data;
using Housing.Models;
using Microsoft.Data.SqlClient;

namespace Housing.Services;

public sealed class HousingAssemblyRepository
{
    private readonly DatabaseSettings _settings;

    public HousingAssemblyRepository(DatabaseSettings settings)
    {
        _settings = settings;
    }

    public async Task InsertHeaderAsync(HousingAssemblyRecord record)
    {
        using var connection = new SqlConnection(CreateConnectionString());
        using var command = connection.CreateCommand();

        command.CommandText = @"
INSERT INTO dbo.Housing_Assembly
(
    [IC_SN],
    [PCB_Barcode],
    [Maker],
    [Model],
    [Variant_1],
    [Variant_2],
    [Operator],
    [Password],
    [Production_Date],
    [Line],
    [Lot_No],
    [Jig_No]
)
VALUES
(
    @IC_SN,
    @PCB_Barcode,
    @Maker,
    @Model,
    @Variant_1,
    @Variant_2,
    @Operator,
    @Password,
    @Production_Date,
    @Line,
    @Lot_No,
    @Jig_No
);";

        AddNVarChar(command, "@IC_SN", 50, record.IcSn);
        AddNVarChar(command, "@PCB_Barcode", 50, record.PcbBarcode);
        AddNVarChar(command, "@Maker", 10, record.Maker);
        AddNVarChar(command, "@Model", 10, record.Model);
        AddNVarChar(command, "@Variant_1", 10, record.Variant1);
        AddNVarChar(command, "@Variant_2", 10, record.Variant2);
        AddNVarChar(command, "@Operator", 10, record.Operator);
        AddNVarChar(command, "@Password", 10, record.Password);
        command.Parameters.Add(new SqlParameter("@Production_Date", SqlDbType.DateTime2) { Value = record.ProductionDate });
        AddNVarChar(command, "@Line", 5, record.Line);
        AddNVarChar(command, "@Lot_No", 8, record.LotNo);
        AddNVarChar(command, "@Jig_No", 10, record.JigNo);

        await connection.OpenAsync();
        await command.ExecuteNonQueryAsync();
    }

    public async Task UpsertHeaderAsync(HousingAssemblyRecord record)
    {
        using var connection = new SqlConnection(CreateConnectionString());
        using var command = connection.CreateCommand();

        command.CommandText = @"
SET XACT_ABORT ON;

BEGIN TRANSACTION;

UPDATE dbo.Housing_Assembly WITH (UPDLOCK, HOLDLOCK)
SET
    [PCB_Barcode] = @PCB_Barcode,
    [Maker] = @Maker,
    [Model] = @Model,
    [Variant_1] = @Variant_1,
    [Variant_2] = @Variant_2,
    [Operator] = @Operator,
    [Password] = @Password,
    [Production_Date] = @Production_Date,
    [Line] = @Line,
    [Lot_No] = @Lot_No,
    [Jig_No] = @Jig_No
WHERE
    [IC_SN] = @IC_SN;

IF @@ROWCOUNT = 0
BEGIN
    INSERT INTO dbo.Housing_Assembly
    (
        [IC_SN],
        [PCB_Barcode],
        [Maker],
        [Model],
        [Variant_1],
        [Variant_2],
        [Operator],
        [Password],
        [Production_Date],
        [Line],
        [Lot_No],
        [Jig_No]
    )
    VALUES
    (
        @IC_SN,
        @PCB_Barcode,
        @Maker,
        @Model,
        @Variant_1,
        @Variant_2,
        @Operator,
        @Password,
        @Production_Date,
        @Line,
        @Lot_No,
        @Jig_No
    );
END;

COMMIT TRANSACTION;";

        AddNVarChar(command, "@IC_SN", 50, record.IcSn);
        AddNVarChar(command, "@PCB_Barcode", 50, record.PcbBarcode);
        AddNVarChar(command, "@Maker", 10, record.Maker);
        AddNVarChar(command, "@Model", 10, record.Model);
        AddNVarChar(command, "@Variant_1", 10, record.Variant1);
        AddNVarChar(command, "@Variant_2", 10, record.Variant2);
        AddNVarChar(command, "@Operator", 10, record.Operator);
        AddNVarChar(command, "@Password", 10, record.Password);
        command.Parameters.Add(new SqlParameter("@Production_Date", SqlDbType.DateTime2) { Value = record.ProductionDate });
        AddNVarChar(command, "@Line", 5, record.Line);
        AddNVarChar(command, "@Lot_No", 8, record.LotNo);
        AddNVarChar(command, "@Jig_No", 10, record.JigNo);

        await connection.OpenAsync();
        await command.ExecuteNonQueryAsync();
    }

    public async Task UpdateMeasurementAsync(HousingAssemblyRecord record)
    {
        using var connection = new SqlConnection(CreateConnectionString());
        using var command = connection.CreateCommand();

        command.CommandText = @"
UPDATE dbo.Housing_Assembly
SET
    [PT_Vol_1] = @PT_Vol_1,
    [PT_Current_1] = @PT_Current_1,
    [Result] = @Result,
    [Spare_1] = @Spare_1,
    [Spare_2] = @Spare_2,
    [Spare_3] = @Spare_3,
    [Spare_4] = @Spare_4
WHERE
    [IC_SN] = @IC_SN;";

        AddNVarChar(command, "@IC_SN", 50, record.IcSn);
        AddDecimal(command, "@PT_Vol_1", record.PtVol1);
        AddDecimal(command, "@PT_Current_1", record.PtCurrent1);
        AddNVarChar(command, "@Result", 5, record.Result);
        AddNullableNVarChar(command, "@Spare_1", 30, record.Spare1);
        AddNullableNVarChar(command, "@Spare_2", 30, record.Spare2);
        AddNullableNVarChar(command, "@Spare_3", 30, record.Spare3);
        AddNullableNVarChar(command, "@Spare_4", 30, record.Spare4);

        await connection.OpenAsync();
        var affectedRows = await command.ExecuteNonQueryAsync();
        if (affectedRows == 0)
        {
            throw new InvalidOperationException("DB measurement update target was not found.");
        }
    }

    public async Task InsertAsync(HousingAssemblyRecord record)
    {
        await UpsertHeaderAsync(record);
        await UpdateMeasurementAsync(record);
    }

    private string CreateConnectionString()
    {
        if (string.IsNullOrWhiteSpace(_settings.Ip) ||
            string.IsNullOrWhiteSpace(_settings.Database) ||
            string.IsNullOrWhiteSpace(_settings.DbId))
        {
            throw new InvalidOperationException("Database.ini의 IP, Database, DbId 값을 확인하세요.");
        }

        var builder = new SqlConnectionStringBuilder
        {
            DataSource = _settings.Ip,
            InitialCatalog = _settings.Database,
            UserID = _settings.DbId,
            Password = _settings.DbPw,
            Encrypt = _settings.Encrypt,
            TrustServerCertificate = _settings.TrustServerCertificate,
            ConnectTimeout = _settings.Timeout
        };

        return builder.ConnectionString;
    }

    private static void AddNVarChar(SqlCommand command, string name, int size, string value)
    {
        command.Parameters.Add(new SqlParameter(name, SqlDbType.NVarChar, size) { Value = value });
    }

    private static void AddNullableNVarChar(SqlCommand command, string name, int size, string? value)
    {
        command.Parameters.Add(new SqlParameter(name, SqlDbType.NVarChar, size)
        {
            Value = string.IsNullOrWhiteSpace(value) ? DBNull.Value : value
        });
    }

    private static void AddDecimal(SqlCommand command, string name, decimal value)
    {
        var parameter = new SqlParameter(name, SqlDbType.Decimal)
        {
            Precision = 3,
            Scale = 2,
            Value = value
        };

        command.Parameters.Add(parameter);
    }
}