-- LLM Provider Registry
CREATE TABLE IF NOT EXISTS llm_providers (
  id SERIAL PRIMARY KEY,
  organization_id INTEGER NOT NULL REFERENCES organizations(id) ON DELETE CASCADE,
  name VARCHAR(200) NOT NULL,
  provider_type VARCHAR(50) NOT NULL DEFAULT 'openai',
  base_url TEXT,
  api_key TEXT,
  enabled_models JSONB DEFAULT '[]',
  is_active BOOLEAN DEFAULT TRUE,
  created_at TIMESTAMP DEFAULT NOW(),
  updated_at TIMESTAMP DEFAULT NOW()
);

-- Add LLM provider reference to bots
ALTER TABLE bots ADD COLUMN IF NOT EXISTS llm_provider_id INTEGER REFERENCES llm_providers(id) ON DELETE SET NULL;
ALTER TABLE bots ADD COLUMN IF NOT EXISTS llm_model VARCHAR(200);

-- Add provider references to rag_settings
ALTER TABLE rag_settings ADD COLUMN IF NOT EXISTS embedding_provider_id INTEGER REFERENCES llm_providers(id) ON DELETE SET NULL;
ALTER TABLE rag_settings ADD COLUMN IF NOT EXISTS chat_provider_id INTEGER REFERENCES llm_providers(id) ON DELETE SET NULL;

-- Allow embedding_model to be NULL when registry provider is selected
ALTER TABLE rag_settings ALTER COLUMN embedding_model DROP NOT NULL;