-- Run this script against the Housing database before running the app.
-- It creates the login table and login procedures.

IF OBJECT_ID(N'dbo.Operator_Account', N'U') IS NULL
BEGIN
    CREATE TABLE dbo.Operator_Account
    (
        [Operator] NVARCHAR(10) NOT NULL
            CONSTRAINT PK_Operator_Account PRIMARY KEY,
        [Password] NVARCHAR(50) NOT NULL,
        [CreatedAt] DATETIME2(0) NOT NULL
            CONSTRAINT DF_Operator_Account_CreatedAt DEFAULT (SYSDATETIME()),
        [UpdatedAt] DATETIME2(0) NULL
    );
END;
GO

IF COL_LENGTH(N'dbo.Operator_Account', N'IsActive') IS NOT NULL
BEGIN
    DECLARE @DefaultConstraintName SYSNAME;

    SELECT @DefaultConstraintName = dc.name
    FROM sys.default_constraints AS dc
    INNER JOIN sys.columns AS c
        ON c.default_object_id = dc.object_id
    WHERE dc.parent_object_id = OBJECT_ID(N'dbo.Operator_Account', N'U')
      AND c.name = N'IsActive';

    IF @DefaultConstraintName IS NOT NULL
    BEGIN
        EXEC(N'ALTER TABLE dbo.Operator_Account DROP CONSTRAINT [' + @DefaultConstraintName + N']');
    END;

    ALTER TABLE dbo.Operator_Account DROP COLUMN [IsActive];
END;
GO

IF EXISTS (SELECT 1 FROM dbo.Operator_Account WHERE [Operator] = N'su')
BEGIN
    UPDATE dbo.Operator_Account
    SET
        [Password] = N'su',
        [UpdatedAt] = SYSDATETIME()
    WHERE [Operator] = N'su';
END
ELSE
BEGIN
    INSERT INTO dbo.Operator_Account
    (
        [Operator],
        [Password]
    )
    VALUES
    (
        N'su',
        N'su'
    );
END;
GO

CREATE OR ALTER PROCEDURE dbo.CheckOperator
    @Operator NVARCHAR(10),
    @Password NVARCHAR(50)
AS
BEGIN
    SET NOCOUNT ON;

    SELECT CAST(
        CASE
            WHEN EXISTS
            (
                SELECT 1
                FROM dbo.Operator_Account
                WHERE [Operator] = @Operator
                  AND [Password] = @Password
            )
            THEN 1
            ELSE 0
        END AS BIT) AS IsValid;
END;
GO

CREATE OR ALTER PROCEDURE dbo.SaveOperator
    @Operator NVARCHAR(10),
    @Password NVARCHAR(50)
AS
BEGIN
    SET NOCOUNT ON;

    IF EXISTS (SELECT 1 FROM dbo.Operator_Account WHERE [Operator] = @Operator)
    BEGIN
        UPDATE dbo.Operator_Account
        SET
            [Password] = @Password,
            [UpdatedAt] = SYSDATETIME()
        WHERE [Operator] = @Operator;
    END
    ELSE
    BEGIN
        INSERT INTO dbo.Operator_Account
        (
            [Operator],
            [Password]
        )
        VALUES
        (
            @Operator,
            @Password
        );
    END;
END;
GO