apiVersion: v1
kind: ConfigMap
metadata:
  name: rag-init-sql
  namespace: customer1
data:
  rag-db-init.sql: |
    -- Enable pgvector extension
    CREATE EXTENSION IF NOT EXISTS vector;

    -- Documents table for RAG knowledge base
    CREATE TABLE IF NOT EXISTS documents (
        id            UUID PRIMARY KEY DEFAULT gen_random_uuid(),
        content       TEXT NOT NULL,
        metadata      JSONB DEFAULT '{}'::jsonb,
        embedding     vector(768),
        created_at    TIMESTAMPTZ NOT NULL DEFAULT now(),
        updated_at    TIMESTAMPTZ NOT NULL DEFAULT now()
    );

    -- HNSW index for vector similarity search (cosine distance)
    CREATE INDEX IF NOT EXISTS idx_documents_embedding_hnsw
        ON documents USING hnsw (embedding vector_cosine_ops);

    -- Full-text search index
    CREATE INDEX IF NOT EXISTS idx_documents_content
        ON documents USING gin (to_tsvector('english', content));

    -- Metadata filter index
    CREATE INDEX IF NOT EXISTS idx_documents_metadata
        ON documents USING gin (metadata);

    -- Auto-update updated_at timestamp
    CREATE OR REPLACE FUNCTION update_documents_updated_at()
    RETURNS TRIGGER AS $$
    BEGIN
        NEW.updated_at = now();
        RETURN NEW;
    END;
    $$ LANGUAGE plpgsql;

    CREATE TRIGGER trg_documents_updated_at
        BEFORE UPDATE ON documents
        FOR EACH ROW
        EXECUTE FUNCTION update_documents_updated_at();