-- CreateTable (additive — table may already exist from db push)
CREATE TABLE IF NOT EXISTS "NoteLink" (
    "id" TEXT NOT NULL,
    "sourceNoteId" TEXT NOT NULL,
    "targetNoteId" TEXT NOT NULL,
    "contextSnippet" TEXT,
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

    CONSTRAINT "NoteLink_pkey" PRIMARY KEY ("id")
);

CREATE UNIQUE INDEX IF NOT EXISTS "NoteLink_sourceNoteId_targetNoteId_key" ON "NoteLink"("sourceNoteId", "targetNoteId");
CREATE INDEX IF NOT EXISTS "NoteLink_sourceNoteId_idx" ON "NoteLink"("sourceNoteId");
CREATE INDEX IF NOT EXISTS "NoteLink_targetNoteId_idx" ON "NoteLink"("targetNoteId");

DO $$ BEGIN
  ALTER TABLE "NoteLink" ADD CONSTRAINT "NoteLink_sourceNoteId_fkey" FOREIGN KEY ("sourceNoteId") REFERENCES "Note"("id") ON DELETE CASCADE ON UPDATE CASCADE;
EXCEPTION
  WHEN duplicate_object THEN null;
END $$;

DO $$ BEGIN
  ALTER TABLE "NoteLink" ADD CONSTRAINT "NoteLink_targetNoteId_fkey" FOREIGN KEY ("targetNoteId") REFERENCES "Note"("id") ON DELETE CASCADE ON UPDATE CASCADE;
EXCEPTION
  WHEN duplicate_object THEN null;
END $$;