-- 0029_tts_provider
-- Add TTS provider/model tables and bots.tts_model_id for existing databases.
-- NOTE: On fresh databases these tables are replaced by unified providers/models via 0061.

DO $$
BEGIN
  IF EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'tts_providers') THEN
    RETURN;
  END IF;

  IF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'providers') THEN
    CREATE TABLE IF NOT EXISTS tts_providers (
      id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
      name TEXT NOT NULL,
      provider TEXT NOT NULL,
      config JSONB NOT NULL DEFAULT '{}'::jsonb,
      created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
      updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
      CONSTRAINT tts_providers_name_unique UNIQUE (name)
    );

    CREATE TABLE IF NOT EXISTS tts_models (
      id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
      model_id TEXT NOT NULL,
      name TEXT,
      tts_provider_id UUID NOT NULL REFERENCES tts_providers(id) ON DELETE CASCADE,
      config JSONB NOT NULL DEFAULT '{}'::jsonb,
      created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
      updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
      CONSTRAINT tts_models_provider_model_id_unique UNIQUE (tts_provider_id, model_id)
    );

    CREATE INDEX IF NOT EXISTS idx_tts_models_provider_id ON tts_models(tts_provider_id);
  END IF;
END $$;

ALTER TABLE bots ADD COLUMN IF NOT EXISTS tts_model_id UUID;

DO $$
BEGIN
  IF NOT EXISTS (
    SELECT 1 FROM pg_constraint WHERE conname = 'bots_tts_model_id_fkey'
  ) THEN
    IF EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'tts_models') THEN
      ALTER TABLE bots
        ADD CONSTRAINT bots_tts_model_id_fkey
        FOREIGN KEY (tts_model_id) REFERENCES tts_models(id) ON DELETE SET NULL;
    ELSE
      ALTER TABLE bots
        ADD CONSTRAINT bots_tts_model_id_fkey
        FOREIGN KEY (tts_model_id) REFERENCES models(id) ON DELETE SET NULL;
    END IF;
  END IF;
END $$;