-- Handles: frames rendered past the cut at each end of a shot. They ship with
-- the EXRs but are not in the edit, so the review player flags them. Purely
-- metadata — nothing renders differently.
ALTER TABLE "versions" ADD COLUMN "handleHead" INTEGER;
ALTER TABLE "versions" ADD COLUMN "handleTail" INTEGER;
ALTER TABLE "versions" ADD COLUMN "pictureStartFrame" INTEGER;

ALTER TABLE "exports" ADD COLUMN "handleHead" INTEGER;
ALTER TABLE "exports" ADD COLUMN "handleTail" INTEGER;

-- Backfill pipeline exports. Every render so far was queued by the panel with
-- its Handle Frames setting (8 unless changed); the value is in the render
-- manifest when the panel found a timing plate, otherwise use the house 8.
UPDATE "exports" e
SET "handleHead" = h.frames, "handleTail" = h.frames
FROM (
  SELECT e2."id",
         COALESCE(
           (SELECT (rj."manifest"->'source'->>'handleFrames')::int
              FROM "render_jobs" rj
             WHERE rj."exportId" = e2."id"
               AND rj."type" = 'AE_RENDER'
               AND jsonb_typeof(rj."manifest"->'source'->'handleFrames') = 'number'
             ORDER BY rj."createdAt" DESC
             LIMIT 1),
           8
         ) AS frames
    FROM "exports" e2
) h
WHERE h."id" = e."id";

-- ...and the preview Versions they produced. pictureStartFrame stays null:
-- the player infers the head slate from the MP4 length vs the EXR frameCount.
UPDATE "versions" v
SET "handleHead" = e."handleHead", "handleTail" = e."handleTail"
FROM "exports" e
WHERE e."versionId" = v."id";