-- Criar tabela para armazenar prompts de instrução
CREATE TABLE public.prompts (
  id uuid NOT NULL DEFAULT gen_random_uuid() PRIMARY KEY,
  name text NOT NULL,
  content text NOT NULL,
  created_at timestamp with time zone NOT NULL DEFAULT now(),
  updated_at timestamp with time zone NOT NULL DEFAULT now(),
  created_by uuid REFERENCES auth.users(id) NOT NULL
);

-- Adicionar RLS à tabela
ALTER TABLE public.prompts ENABLE ROW LEVEL SECURITY;

-- Políticas para prompts
CREATE POLICY "Users can view their own prompts" ON public.prompts
  FOR SELECT USING (auth.uid() = created_by);

CREATE POLICY "Users can create their own prompts" ON public.prompts
  FOR INSERT WITH CHECK (auth.uid() = created_by);

CREATE POLICY "Users can update their own prompts" ON public.prompts
  FOR UPDATE USING (auth.uid() = created_by);

CREATE POLICY "Users can delete their own prompts" ON public.prompts
  FOR DELETE USING (auth.uid() = created_by);

-- Trigger para atualizar updated_at automaticamente
CREATE OR REPLACE FUNCTION update_updated_at_prompts()
RETURNS TRIGGER AS $$
BEGIN
    NEW.updated_at = now();
    RETURN NEW;
END;
$$ LANGUAGE plpgsql;

CREATE TRIGGER update_prompts_updated_at
    BEFORE UPDATE ON public.prompts
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_prompts();