CREATE TABLE IF NOT EXISTS "CanvasLayoutReplaceBatch" (
  "id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
  "userId" uuid NOT NULL REFERENCES "User"("id") ON DELETE CASCADE,
  "projectId" uuid NOT NULL REFERENCES "CanvasProject"("id") ON DELETE CASCADE,
  "status" varchar(24) NOT NULL DEFAULT 'pending',
  "referenceImageUrl" text NOT NULL,
  "supplementalPrompt" text,
  "imageSize" varchar(16) NOT NULL DEFAULT '2K',
  "totalCount" integer NOT NULL,
  "completedCount" integer NOT NULL DEFAULT 0,
  "failedCount" integer NOT NULL DEFAULT 0,
  "completedAt" timestamp,
  "createdAt" timestamp NOT NULL DEFAULT now(),
  "updatedAt" timestamp NOT NULL DEFAULT now()
);

CREATE INDEX IF NOT EXISTS "CanvasLayoutReplaceBatch_project_created_idx"
  ON "CanvasLayoutReplaceBatch"("projectId", "createdAt");

CREATE INDEX IF NOT EXISTS "CanvasLayoutReplaceBatch_user_status_idx"
  ON "CanvasLayoutReplaceBatch"("userId", "status");

CREATE TABLE IF NOT EXISTS "CanvasLayoutReplaceBatchItem" (
  "id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
  "batchId" uuid NOT NULL REFERENCES "CanvasLayoutReplaceBatch"("id") ON DELETE CASCADE,
  "taskId" uuid NOT NULL REFERENCES "CanvasImageTask"("id") ON DELETE CASCADE,
  "position" integer NOT NULL,
  "sourceNodeId" varchar(160),
  "sourceImageUrl" text NOT NULL,
  "sourceTitle" varchar(256),
  "sourceKind" varchar(16) NOT NULL DEFAULT 'canvas',
  "status" varchar(16) NOT NULL DEFAULT 'pending',
  "resultImageUrl" text,
  "resultThumbnailUrl" text,
  "resultModelId" varchar(160),
  "error" text,
  "addedToCanvas" boolean NOT NULL DEFAULT false,
  "addedCanvasNodeId" varchar(160),
  "completedAt" timestamp,
  "createdAt" timestamp NOT NULL DEFAULT now(),
  "updatedAt" timestamp NOT NULL DEFAULT now()
);

CREATE INDEX IF NOT EXISTS "CanvasLayoutReplaceBatchItem_batch_position_idx"
  ON "CanvasLayoutReplaceBatchItem"("batchId", "position");

CREATE INDEX IF NOT EXISTS "CanvasLayoutReplaceBatchItem_task_idx"
  ON "CanvasLayoutReplaceBatchItem"("taskId");