IF OBJECT_ID(N'dbo.StoryIntelligenceNarrativeCandidateEvidence', N'U') IS NULL
BEGIN
    CREATE TABLE dbo.StoryIntelligenceNarrativeCandidateEvidence
    (
        NarrativeCandidateEvidenceID int IDENTITY(1,1) NOT NULL CONSTRAINT PK_StoryIntelligenceNarrativeCandidateEvidence PRIMARY KEY,
        NarrativeCandidateID int NOT NULL,
        SceneID int NOT NULL,
        ContributionType nvarchar(40) NULL,
        Evidence nvarchar(1000) NULL,
        SortOrder int NOT NULL CONSTRAINT DF_StoryIntelligenceNarrativeCandidateEvidence_SortOrder DEFAULT 0,
        CreatedUtc datetime2 NOT NULL CONSTRAINT DF_StoryIntelligenceNarrativeCandidateEvidence_CreatedUtc DEFAULT SYSUTCDATETIME()
    );
END;

IF OBJECT_ID(N'dbo.StoryIntelligenceNarrativeCandidates', N'U') IS NULL
BEGIN
    CREATE TABLE dbo.StoryIntelligenceNarrativeCandidates
    (
        NarrativeCandidateID int IDENTITY(1,1) NOT NULL CONSTRAINT PK_StoryIntelligenceNarrativeCandidates PRIMARY KEY,
        ProjectID int NOT NULL,
        BookID int NOT NULL,
        CandidateType nvarchar(20) NOT NULL,
        CandidateKey nvarchar(220) NOT NULL,
        ProposedTitle nvarchar(200) NOT NULL,
        ProposedDescription nvarchar(1000) NULL,
        Category nvarchar(80) NULL,
        InferredState nvarchar(40) NULL,
        ExistingPlotLineID int NULL,
        ExistingPlotThreadID int NULL,
        RelatedPlotLineID int NULL,
        Confidence decimal(5,4) NULL,
        Status nvarchar(20) NOT NULL CONSTRAINT DF_StoryIntelligenceNarrativeCandidates_Status DEFAULT N'Pending',
        ReviewAction nvarchar(40) NULL,
        AcceptedPlotLineID int NULL,
        AcceptedPlotThreadID int NULL,
        ReviewedByUserID int NULL,
        ReviewedUtc datetime2 NULL,
        CreatedUtc datetime2 NOT NULL CONSTRAINT DF_StoryIntelligenceNarrativeCandidates_CreatedUtc DEFAULT SYSUTCDATETIME(),
        UpdatedUtc datetime2 NOT NULL CONSTRAINT DF_StoryIntelligenceNarrativeCandidates_UpdatedUtc DEFAULT SYSUTCDATETIME(),
        CONSTRAINT FK_StoryIntelligenceNarrativeCandidates_Projects FOREIGN KEY (ProjectID) REFERENCES dbo.Projects(ProjectID),
        CONSTRAINT FK_StoryIntelligenceNarrativeCandidates_Books FOREIGN KEY (BookID) REFERENCES dbo.Books(BookID),
        CONSTRAINT FK_StoryIntelligenceNarrativeCandidates_ExistingPlotLines FOREIGN KEY (ExistingPlotLineID) REFERENCES dbo.PlotLines(PlotLineID),
        CONSTRAINT FK_StoryIntelligenceNarrativeCandidates_RelatedPlotLines FOREIGN KEY (RelatedPlotLineID) REFERENCES dbo.PlotLines(PlotLineID),
        CONSTRAINT FK_StoryIntelligenceNarrativeCandidates_AcceptedPlotLines FOREIGN KEY (AcceptedPlotLineID) REFERENCES dbo.PlotLines(PlotLineID),
        CONSTRAINT FK_StoryIntelligenceNarrativeCandidates_ExistingPlotThreads FOREIGN KEY (ExistingPlotThreadID) REFERENCES dbo.PlotThreads(PlotThreadID),
        CONSTRAINT FK_StoryIntelligenceNarrativeCandidates_AcceptedPlotThreads FOREIGN KEY (AcceptedPlotThreadID) REFERENCES dbo.PlotThreads(PlotThreadID)
    );
END;

IF NOT EXISTS (SELECT 1 FROM sys.foreign_keys WHERE name = N'FK_StoryIntelligenceNarrativeCandidateEvidence_Candidates')
BEGIN
    ALTER TABLE dbo.StoryIntelligenceNarrativeCandidateEvidence
        ADD CONSTRAINT FK_StoryIntelligenceNarrativeCandidateEvidence_Candidates
        FOREIGN KEY (NarrativeCandidateID) REFERENCES dbo.StoryIntelligenceNarrativeCandidates(NarrativeCandidateID) ON DELETE CASCADE;
END;

IF NOT EXISTS (SELECT 1 FROM sys.foreign_keys WHERE name = N'FK_StoryIntelligenceNarrativeCandidateEvidence_Scenes')
BEGIN
    ALTER TABLE dbo.StoryIntelligenceNarrativeCandidateEvidence
        ADD CONSTRAINT FK_StoryIntelligenceNarrativeCandidateEvidence_Scenes
        FOREIGN KEY (SceneID) REFERENCES dbo.Scenes(SceneID);
END;

IF NOT EXISTS (SELECT 1 FROM sys.indexes WHERE name = N'UX_StoryIntelligenceNarrativeCandidates_BookTypeKey' AND object_id = OBJECT_ID(N'dbo.StoryIntelligenceNarrativeCandidates'))
    CREATE UNIQUE INDEX UX_StoryIntelligenceNarrativeCandidates_BookTypeKey ON dbo.StoryIntelligenceNarrativeCandidates(BookID, CandidateType, CandidateKey);

IF NOT EXISTS (SELECT 1 FROM sys.indexes WHERE name = N'IX_StoryIntelligenceNarrativeCandidates_Status' AND object_id = OBJECT_ID(N'dbo.StoryIntelligenceNarrativeCandidates'))
    CREATE INDEX IX_StoryIntelligenceNarrativeCandidates_Status ON dbo.StoryIntelligenceNarrativeCandidates(BookID, Status, CandidateType);

IF NOT EXISTS (SELECT 1 FROM sys.indexes WHERE name = N'IX_StoryIntelligenceNarrativeCandidateEvidence_Candidate' AND object_id = OBJECT_ID(N'dbo.StoryIntelligenceNarrativeCandidateEvidence'))
    CREATE INDEX IX_StoryIntelligenceNarrativeCandidateEvidence_Candidate ON dbo.StoryIntelligenceNarrativeCandidateEvidence(NarrativeCandidateID, SceneID);
GO

CREATE OR ALTER PROCEDURE dbo.StoryIntelligenceNarrativeCandidate_Save
    @ProjectID int,
    @BookID int,
    @CandidateType nvarchar(20),
    @CandidateKey nvarchar(220),
    @ProposedTitle nvarchar(200),
    @ProposedDescription nvarchar(1000) = NULL,
    @Category nvarchar(80) = NULL,
    @InferredState nvarchar(40) = NULL,
    @ExistingPlotLineID int = NULL,
    @ExistingPlotThreadID int = NULL,
    @RelatedPlotLineID int = NULL,
    @Confidence decimal(5,4) = NULL
AS
BEGIN
    SET NOCOUNT ON;

    DECLARE @NarrativeCandidateID int;

    SELECT @NarrativeCandidateID = NarrativeCandidateID
    FROM dbo.StoryIntelligenceNarrativeCandidates
    WHERE BookID = @BookID AND CandidateType = @CandidateType AND CandidateKey = @CandidateKey;

    IF @NarrativeCandidateID IS NULL
    BEGIN
        INSERT dbo.StoryIntelligenceNarrativeCandidates
            (ProjectID, BookID, CandidateType, CandidateKey, ProposedTitle, ProposedDescription, Category, InferredState,
             ExistingPlotLineID, ExistingPlotThreadID, RelatedPlotLineID, Confidence)
        VALUES
            (@ProjectID, @BookID, @CandidateType, @CandidateKey, @ProposedTitle, @ProposedDescription, @Category, @InferredState,
             @ExistingPlotLineID, @ExistingPlotThreadID, @RelatedPlotLineID, @Confidence);

        SET @NarrativeCandidateID = CAST(SCOPE_IDENTITY() AS int);
    END
    ELSE
    BEGIN
        UPDATE dbo.StoryIntelligenceNarrativeCandidates
        SET ProposedTitle = @ProposedTitle,
            ProposedDescription = @ProposedDescription,
            Category = @Category,
            InferredState = @InferredState,
            ExistingPlotLineID = @ExistingPlotLineID,
            ExistingPlotThreadID = @ExistingPlotThreadID,
            RelatedPlotLineID = @RelatedPlotLineID,
            Confidence = @Confidence,
            UpdatedUtc = SYSUTCDATETIME()
        WHERE NarrativeCandidateID = @NarrativeCandidateID
          AND Status = N'Pending';
    END;

    SELECT @NarrativeCandidateID;
END;
GO

CREATE OR ALTER PROCEDURE dbo.StoryIntelligenceNarrativeCandidateEvidence_Save
    @NarrativeCandidateID int,
    @SceneID int,
    @ContributionType nvarchar(40) = NULL,
    @Evidence nvarchar(1000) = NULL,
    @SortOrder int = 0
AS
BEGIN
    SET NOCOUNT ON;

    IF NOT EXISTS
    (
        SELECT 1
        FROM dbo.StoryIntelligenceNarrativeCandidateEvidence
        WHERE NarrativeCandidateID = @NarrativeCandidateID
          AND SceneID = @SceneID
          AND ISNULL(Evidence, N'') = ISNULL(@Evidence, N'')
    )
    BEGIN
        INSERT dbo.StoryIntelligenceNarrativeCandidateEvidence (NarrativeCandidateID, SceneID, ContributionType, Evidence, SortOrder)
        VALUES (@NarrativeCandidateID, @SceneID, @ContributionType, @Evidence, @SortOrder);
    END;
END;
GO

CREATE OR ALTER PROCEDURE dbo.StoryIntelligenceNarrativeCandidate_ListByBook
    @BookID int
AS
BEGIN
    SET NOCOUNT ON;

    SELECT nc.NarrativeCandidateID, nc.ProjectID, nc.BookID, nc.CandidateType, nc.CandidateKey,
        nc.ProposedTitle, nc.ProposedDescription, nc.Category, nc.InferredState,
        nc.ExistingPlotLineID, epl.PlotLineName AS ExistingPlotLineName,
        nc.ExistingPlotThreadID, ept.ThreadTitle AS ExistingPlotThreadTitle,
        nc.RelatedPlotLineID, rpl.PlotLineName AS RelatedPlotLineName,
        nc.Confidence, nc.Status, nc.ReviewAction, nc.AcceptedPlotLineID, apl.PlotLineName AS AcceptedPlotLineName,
        nc.AcceptedPlotThreadID, apt.ThreadTitle AS AcceptedPlotThreadTitle,
        nc.ReviewedByUserID, nc.ReviewedUtc, nc.CreatedUtc, nc.UpdatedUtc
    FROM dbo.StoryIntelligenceNarrativeCandidates nc
    LEFT JOIN dbo.PlotLines epl ON epl.PlotLineID = nc.ExistingPlotLineID
    LEFT JOIN dbo.PlotThreads ept ON ept.PlotThreadID = nc.ExistingPlotThreadID
    LEFT JOIN dbo.PlotLines rpl ON rpl.PlotLineID = nc.RelatedPlotLineID
    LEFT JOIN dbo.PlotLines apl ON apl.PlotLineID = nc.AcceptedPlotLineID
    LEFT JOIN dbo.PlotThreads apt ON apt.PlotThreadID = nc.AcceptedPlotThreadID
    WHERE nc.BookID = @BookID
    ORDER BY CASE nc.Status WHEN N'Pending' THEN 0 ELSE 1 END, nc.CandidateType, nc.ProposedTitle;

    SELECT e.NarrativeCandidateEvidenceID, e.NarrativeCandidateID, e.SceneID,
        s.SceneNumber, s.SceneTitle, c.ChapterNumber, c.ChapterTitle,
        e.ContributionType, e.Evidence, e.SortOrder, e.CreatedUtc
    FROM dbo.StoryIntelligenceNarrativeCandidateEvidence e
    INNER JOIN dbo.StoryIntelligenceNarrativeCandidates nc ON nc.NarrativeCandidateID = e.NarrativeCandidateID
    INNER JOIN dbo.Scenes s ON s.SceneID = e.SceneID
    INNER JOIN dbo.Chapters c ON c.ChapterID = s.ChapterID
    WHERE nc.BookID = @BookID
    ORDER BY e.NarrativeCandidateID, c.SortOrder, s.SortOrder, e.SortOrder;
END;
GO

CREATE OR ALTER PROCEDURE dbo.StoryIntelligenceNarrativeCandidate_MarkReviewed
    @NarrativeCandidateID int,
    @Status nvarchar(20),
    @ReviewAction nvarchar(40),
    @ReviewedByUserID int,
    @AcceptedPlotLineID int = NULL,
    @AcceptedPlotThreadID int = NULL
AS
BEGIN
    SET NOCOUNT ON;

    UPDATE dbo.StoryIntelligenceNarrativeCandidates
    SET Status = @Status,
        ReviewAction = @ReviewAction,
        ReviewedByUserID = @ReviewedByUserID,
        ReviewedUtc = SYSUTCDATETIME(),
        AcceptedPlotLineID = @AcceptedPlotLineID,
        AcceptedPlotThreadID = @AcceptedPlotThreadID,
        UpdatedUtc = SYSUTCDATETIME()
    WHERE NarrativeCandidateID = @NarrativeCandidateID;
END;
GO