SET ANSI_NULLS ON;
GO
SET QUOTED_IDENTIFIER ON;
GO

IF COL_LENGTH(N'dbo.IllustrationLibraryItems', N'DisplayName') IS NULL
    ALTER TABLE dbo.IllustrationLibraryItems ADD DisplayName nvarchar(200) NULL;
GO

IF COL_LENGTH(N'dbo.IllustrationLibraryItems', N'Description') IS NULL
    ALTER TABLE dbo.IllustrationLibraryItems ADD Description nvarchar(500) NULL;
GO

IF COL_LENGTH(N'dbo.IllustrationLibraryItems', N'Prompt') IS NULL
    ALTER TABLE dbo.IllustrationLibraryItems ADD Prompt nvarchar(max) NULL;
GO

IF COL_LENGTH(N'dbo.IllustrationLibraryItems', N'GenerationAttemptCount') IS NULL
    ALTER TABLE dbo.IllustrationLibraryItems ADD GenerationAttemptCount int NOT NULL CONSTRAINT DF_IllustrationLibraryItems_GenerationAttemptCount DEFAULT 0;
GO

IF COL_LENGTH(N'dbo.IllustrationLibraryItems', N'ErrorMessage') IS NULL
    ALTER TABLE dbo.IllustrationLibraryItems ADD ErrorMessage nvarchar(1000) NULL;
GO

IF COL_LENGTH(N'dbo.IllustrationLibraryItems', N'RejectedUtc') IS NULL
    ALTER TABLE dbo.IllustrationLibraryItems ADD RejectedUtc datetime2(0) NULL;
GO

IF COL_LENGTH(N'dbo.IllustrationLibraryItems', N'RejectedByUserID') IS NULL
    ALTER TABLE dbo.IllustrationLibraryItems ADD RejectedByUserID int NULL;
GO

UPDATE dbo.IllustrationLibraryItems
SET DisplayName = ISNULL(DisplayName, DisplayTitle),
    Description = ISNULL(Description, ShortDescription),
    Prompt = ISNULL(Prompt, PromptText),
    GenerationAttemptCount = CASE WHEN GenerationAttemptCount = 0 THEN AttemptCount ELSE GenerationAttemptCount END,
    ErrorMessage = ISNULL(ErrorMessage, LastError)
WHERE DisplayName IS NULL
    OR Description IS NULL
    OR Prompt IS NULL
    OR ErrorMessage IS NULL
    OR GenerationAttemptCount = 0;
GO

IF EXISTS (SELECT 1 FROM sys.check_constraints WHERE name = N'CK_IllustrationLibraryItems_Status')
    ALTER TABLE dbo.IllustrationLibraryItems DROP CONSTRAINT CK_IllustrationLibraryItems_Status;
GO

ALTER TABLE dbo.IllustrationLibraryItems
    ADD CONSTRAINT CK_IllustrationLibraryItems_Status
    CHECK (Status IN (N'Planned', N'Queued', N'Generating', N'Generated', N'Approved', N'Rejected', N'Failed', N'Superseded', N'Disabled'));
GO

IF NOT EXISTS (SELECT 1 FROM sys.foreign_keys WHERE name = N'FK_IllustrationLibraryItems_RejectedBy')
    AND OBJECT_ID(N'dbo.AppUser', N'U') IS NOT NULL
BEGIN
    ALTER TABLE dbo.IllustrationLibraryItems
        ADD CONSTRAINT FK_IllustrationLibraryItems_RejectedBy
        FOREIGN KEY (RejectedByUserID) REFERENCES dbo.AppUser(UserID);
END;
GO

CREATE OR ALTER PROCEDURE dbo.IllustrationLibraryItem_List
    @Category nvarchar(40) = NULL,
    @Status nvarchar(40) = NULL,
    @Search nvarchar(120) = NULL
AS
BEGIN
    SET NOCOUNT ON;

    SELECT *
    FROM dbo.IllustrationLibraryItems
    WHERE (@Category IS NULL OR Category = @Category)
        AND (@Status IS NULL OR Status = @Status)
        AND (
            @Search IS NULL
            OR StableCode LIKE N'%' + @Search + N'%'
            OR ISNULL(DisplayName, DisplayTitle) LIKE N'%' + @Search + N'%'
            OR ISNULL(Description, ShortDescription) LIKE N'%' + @Search + N'%'
        )
    ORDER BY
        CASE Status
            WHEN N'Generating' THEN 1
            WHEN N'Queued' THEN 2
            WHEN N'Generated' THEN 3
            WHEN N'Planned' THEN 4
            WHEN N'Failed' THEN 5
            WHEN N'Rejected' THEN 6
            WHEN N'Approved' THEN 7
            WHEN N'Superseded' THEN 8
            ELSE 9
        END,
        UpdatedUtc DESC,
        IllustrationLibraryItemID DESC;
END;
GO

CREATE OR ALTER PROCEDURE dbo.IllustrationLibraryItem_Summary
AS
BEGIN
    SET NOCOUNT ON;

    SELECT
        COUNT(1) AS TotalCount,
        ISNULL(SUM(CASE WHEN Status = N'Planned' THEN 1 ELSE 0 END), 0) AS PlannedCount,
        ISNULL(SUM(CASE WHEN Status = N'Queued' THEN 1 ELSE 0 END), 0) AS QueuedCount,
        ISNULL(SUM(CASE WHEN Status = N'Generating' THEN 1 ELSE 0 END), 0) AS GeneratingCount,
        ISNULL(SUM(CASE WHEN Status = N'Generated' THEN 1 ELSE 0 END), 0) AS GeneratedCount,
        ISNULL(SUM(CASE WHEN Status = N'Approved' THEN 1 ELSE 0 END), 0) AS ApprovedCount,
        ISNULL(SUM(CASE WHEN Status = N'Rejected' THEN 1 ELSE 0 END), 0) AS RejectedCount,
        ISNULL(SUM(CASE WHEN Status = N'Failed' THEN 1 ELSE 0 END), 0) AS FailedCount,
        ISNULL(SUM(CASE WHEN Status = N'Superseded' THEN 1 ELSE 0 END), 0) AS SupersededCount,
        ISNULL(SUM(CASE WHEN Status = N'Disabled' THEN 1 ELSE 0 END), 0) AS DisabledCount
    FROM dbo.IllustrationLibraryItems;
END;
GO

CREATE OR ALTER PROCEDURE dbo.IllustrationLibraryItem_UpsertPlanned
    @Category nvarchar(40),
    @StableCode nvarchar(120),
    @DisplayTitle nvarchar(200),
    @ShortDescription nvarchar(500) = NULL,
    @MetadataJson nvarchar(max) = NULL,
    @SpecificationJson nvarchar(max) = NULL
AS
BEGIN
    SET NOCOUNT ON;

    IF EXISTS (
        SELECT 1
        FROM dbo.IllustrationLibraryItems
        WHERE StableCode = @StableCode
            AND ParentItemID IS NULL
            AND IsActive = 1
            AND Status IN (N'Planned', N'Queued', N'Generating', N'Generated', N'Approved')
    )
    BEGIN
        SELECT * FROM dbo.IllustrationLibraryItems
        WHERE StableCode = @StableCode
            AND ParentItemID IS NULL
            AND IsActive = 1
            AND Status IN (N'Planned', N'Queued', N'Generating', N'Generated', N'Approved');
        RETURN;
    END;

    INSERT dbo.IllustrationLibraryItems
        (Category, StableCode, DisplayTitle, DisplayName, ShortDescription, Description, MetadataJson, SpecificationJson, Status)
    VALUES
        (@Category, @StableCode, @DisplayTitle, @DisplayTitle, @ShortDescription, @ShortDescription, @MetadataJson, @SpecificationJson, N'Planned');

    SELECT * FROM dbo.IllustrationLibraryItems WHERE IllustrationLibraryItemID = SCOPE_IDENTITY();
END;
GO

CREATE OR ALTER PROCEDURE dbo.IllustrationLibraryItem_ClaimNext
AS
BEGIN
    SET NOCOUNT ON;
    SET XACT_ABORT ON;

    BEGIN TRANSACTION;

    DECLARE @Claimed TABLE (IllustrationLibraryItemID int NOT NULL);

    ;WITH nextItem AS
    (
        SELECT TOP (1) *
        FROM dbo.IllustrationLibraryItems WITH (UPDLOCK, READPAST, ROWLOCK)
        WHERE Status = N'Queued'
            AND IsActive = 1
            AND GenerationAttemptCount < 3
        ORDER BY QueuedUtc, IllustrationLibraryItemID
    )
    UPDATE nextItem
    SET Status = N'Generating',
        AttemptCount = AttemptCount + 1,
        GenerationAttemptCount = GenerationAttemptCount + 1,
        StartedUtc = SYSUTCDATETIME(),
        UpdatedUtc = SYSUTCDATETIME()
    OUTPUT inserted.IllustrationLibraryItemID INTO @Claimed;

    SELECT item.*
    FROM dbo.IllustrationLibraryItems item
    INNER JOIN @Claimed claimed ON claimed.IllustrationLibraryItemID = item.IllustrationLibraryItemID;

    COMMIT TRANSACTION;
END;
GO

CREATE OR ALTER PROCEDURE dbo.IllustrationLibraryItem_MarkGenerated
    @IllustrationLibraryItemID int,
    @FilePath nvarchar(500),
    @ThumbnailPath nvarchar(500),
    @Width int,
    @Height int,
    @FileSizeBytes bigint,
    @MimeType nvarchar(100),
    @Provider nvarchar(80),
    @Model nvarchar(120),
    @PromptText nvarchar(max),
    @PromptTemplateVersion nvarchar(40),
    @ProviderRequestID nvarchar(160) = NULL
AS
BEGIN
    SET NOCOUNT ON;

    UPDATE dbo.IllustrationLibraryItems
    SET Status = N'Generated',
        FilePath = @FilePath,
        ThumbnailPath = @ThumbnailPath,
        Width = @Width,
        Height = @Height,
        FileSizeBytes = @FileSizeBytes,
        MimeType = @MimeType,
        Provider = @Provider,
        Model = @Model,
        PromptText = @PromptText,
        Prompt = @PromptText,
        PromptTemplateVersion = @PromptTemplateVersion,
        ProviderRequestID = @ProviderRequestID,
        CompletedUtc = SYSUTCDATETIME(),
        UpdatedUtc = SYSUTCDATETIME(),
        LastError = NULL,
        ErrorMessage = NULL
    WHERE IllustrationLibraryItemID = @IllustrationLibraryItemID
        AND Status = N'Generating';
END;
GO

CREATE OR ALTER PROCEDURE dbo.IllustrationLibraryItem_MarkFailed
    @IllustrationLibraryItemID int,
    @LastError nvarchar(1000)
AS
BEGIN
    SET NOCOUNT ON;

    UPDATE dbo.IllustrationLibraryItems
    SET Status = N'Failed',
        LastError = @LastError,
        ErrorMessage = @LastError,
        CompletedUtc = SYSUTCDATETIME(),
        UpdatedUtc = SYSUTCDATETIME()
    WHERE IllustrationLibraryItemID = @IllustrationLibraryItemID
        AND Status = N'Generating';
END;
GO

CREATE OR ALTER PROCEDURE dbo.IllustrationLibraryItem_Approve
    @IllustrationLibraryItemID int,
    @ApprovedByUserID int
AS
BEGIN
    SET NOCOUNT ON;

    DECLARE @StableCode nvarchar(120);
    SELECT @StableCode = StableCode FROM dbo.IllustrationLibraryItems WHERE IllustrationLibraryItemID = @IllustrationLibraryItemID;

    UPDATE dbo.IllustrationLibraryItems
    SET IsApproved = 0,
        Status = N'Superseded',
        UpdatedUtc = SYSUTCDATETIME()
    WHERE StableCode = @StableCode
        AND IllustrationLibraryItemID <> @IllustrationLibraryItemID
        AND Status = N'Approved';

    UPDATE dbo.IllustrationLibraryItems
    SET Status = N'Approved',
        IsApproved = 1,
        ApprovedUtc = SYSUTCDATETIME(),
        ApprovedByUserID = @ApprovedByUserID,
        UpdatedUtc = SYSUTCDATETIME()
    WHERE IllustrationLibraryItemID = @IllustrationLibraryItemID
        AND Status = N'Generated'
        AND FilePath IS NOT NULL;
END;
GO

CREATE OR ALTER PROCEDURE dbo.IllustrationLibraryItem_Reject
    @IllustrationLibraryItemID int,
    @RejectedByUserID int,
    @RejectionReason nvarchar(500) = NULL
AS
BEGIN
    SET NOCOUNT ON;

    UPDATE dbo.IllustrationLibraryItems
    SET Status = N'Rejected',
        IsApproved = 0,
        RejectedUtc = SYSUTCDATETIME(),
        RejectedByUserID = @RejectedByUserID,
        RejectionReason = @RejectionReason,
        UpdatedUtc = SYSUTCDATETIME()
    WHERE IllustrationLibraryItemID = @IllustrationLibraryItemID
        AND Status IN (N'Generated', N'Approved');
END;
GO

CREATE OR ALTER PROCEDURE dbo.IllustrationLibraryItem_CreateRegeneration
    @IllustrationLibraryItemID int,
    @AdminNotes nvarchar(1000) = NULL
AS
BEGIN
    SET NOCOUNT ON;

    INSERT dbo.IllustrationLibraryItems
        (Category, StableCode, DisplayTitle, DisplayName, ShortDescription, Description, MetadataJson, SpecificationJson, Status, ParentItemID, AdminNotes)
    SELECT Category, StableCode, DisplayTitle, ISNULL(DisplayName, DisplayTitle), ShortDescription, ISNULL(Description, ShortDescription),
        MetadataJson, SpecificationJson, N'Planned', IllustrationLibraryItemID, @AdminNotes
    FROM dbo.IllustrationLibraryItems
    WHERE IllustrationLibraryItemID = @IllustrationLibraryItemID
        AND Status IN (N'Generated', N'Approved', N'Rejected', N'Failed', N'Superseded');

    SELECT * FROM dbo.IllustrationLibraryItems WHERE IllustrationLibraryItemID = SCOPE_IDENTITY();
END;
GO