-- =============================================================================
-- AgenciaPsi — Migration 001: Twilio WhatsApp Subaccounts
-- =============================================================================
-- Adiciona suporte a subcontas Twilio com número WhatsApp dedicado por tenant.
-- Cada clínica/terapeuta recebe sua própria subconta Twilio com número exclusivo.
-- =============================================================================

-- ── 1. Campos de subconta Twilio em notification_channels ──────────────────

ALTER TABLE public.notification_channels
  ADD COLUMN IF NOT EXISTS twilio_subaccount_sid    text,
  ADD COLUMN IF NOT EXISTS twilio_phone_number       text,
  ADD COLUMN IF NOT EXISTS twilio_phone_sid          text,
  ADD COLUMN IF NOT EXISTS webhook_url               text,
  ADD COLUMN IF NOT EXISTS cost_per_message_usd      numeric(8,6) DEFAULT 0,
  ADD COLUMN IF NOT EXISTS price_per_message_brl     numeric(8,4) DEFAULT 0,
  ADD COLUMN IF NOT EXISTS provisioned_at            timestamp with time zone;

COMMENT ON COLUMN public.notification_channels.twilio_subaccount_sid   IS 'SID da subconta Twilio criada para este tenant';
COMMENT ON COLUMN public.notification_channels.twilio_phone_number      IS 'Número WhatsApp provisionado (E.164, ex: +5511999990000)';
COMMENT ON COLUMN public.notification_channels.twilio_phone_sid         IS 'SID do número de telefone na subconta Twilio';
COMMENT ON COLUMN public.notification_channels.webhook_url              IS 'URL do webhook configurada na Twilio para receber callbacks de status';
COMMENT ON COLUMN public.notification_channels.cost_per_message_usd    IS 'Custo real Twilio por mensagem WhatsApp (USD)';
COMMENT ON COLUMN public.notification_channels.price_per_message_brl   IS 'Valor cobrado do tenant por mensagem (BRL, inclui margem SaaS)';
COMMENT ON COLUMN public.notification_channels.provisioned_at           IS 'Timestamp do provisionamento da subconta';

-- Índice para busca rápida por subconta
CREATE INDEX IF NOT EXISTS idx_notification_channels_twilio_subaccount_sid
  ON public.notification_channels (twilio_subaccount_sid)
  WHERE twilio_subaccount_sid IS NOT NULL;

-- ── 2. Tabela de consumo por subconta ─────────────────────────────────────

CREATE TABLE IF NOT EXISTS public.twilio_subaccount_usage (
  id                    uuid DEFAULT gen_random_uuid() NOT NULL,
  tenant_id             uuid NOT NULL,
  channel_id            uuid NOT NULL,
  twilio_subaccount_sid text NOT NULL,
  period_start          date NOT NULL,
  period_end            date NOT NULL,
  messages_sent         integer DEFAULT 0 NOT NULL,
  messages_delivered    integer DEFAULT 0 NOT NULL,
  messages_failed       integer DEFAULT 0 NOT NULL,
  cost_usd              numeric(12,6) DEFAULT 0 NOT NULL,
  cost_brl              numeric(12,4) DEFAULT 0 NOT NULL,
  revenue_brl           numeric(12,4) DEFAULT 0 NOT NULL,
  margin_brl            numeric(12,4) GENERATED ALWAYS AS (revenue_brl - cost_brl) STORED,
  usd_brl_rate          numeric(8,4) DEFAULT 0,
  synced_at             timestamp with time zone DEFAULT now(),
  created_at            timestamp with time zone DEFAULT now() NOT NULL,

  CONSTRAINT twilio_subaccount_usage_pkey PRIMARY KEY (id),
  CONSTRAINT twilio_subaccount_usage_channel_fk
    FOREIGN KEY (channel_id) REFERENCES public.notification_channels(id) ON DELETE CASCADE,
  CONSTRAINT twilio_subaccount_usage_period_check
    CHECK (period_end >= period_start)
);

COMMENT ON TABLE public.twilio_subaccount_usage IS
  'Consumo mensal de mensagens WhatsApp por subconta Twilio. Sincronizado via Edge Function.';

CREATE INDEX IF NOT EXISTS idx_twilio_usage_tenant_period
  ON public.twilio_subaccount_usage (tenant_id, period_start DESC);

CREATE INDEX IF NOT EXISTS idx_twilio_usage_channel
  ON public.twilio_subaccount_usage (channel_id, period_start DESC);

CREATE UNIQUE INDEX IF NOT EXISTS idx_twilio_usage_unique_period
  ON public.twilio_subaccount_usage (channel_id, period_start, period_end);

ALTER TABLE public.twilio_subaccount_usage OWNER TO supabase_admin;

-- ── 3. RLS: twilio_subaccount_usage ───────────────────────────────────────

ALTER TABLE public.twilio_subaccount_usage ENABLE ROW LEVEL SECURITY;

-- Tenant vê apenas seu próprio consumo
CREATE POLICY "tenant_select_own_usage"
  ON public.twilio_subaccount_usage
  FOR SELECT
  USING (
    tenant_id IN (
      SELECT tenant_id FROM public.tenant_members
      WHERE user_id = auth.uid()
    )
  );

-- Apenas service_role pode inserir/atualizar (via Edge Function)
CREATE POLICY "service_role_manage_usage"
  ON public.twilio_subaccount_usage
  FOR ALL
  USING (auth.role() = 'service_role');

-- ── 4. RLS: notification_channels — acesso ao twilio_subaccount_sid ───────
-- As políticas existentes já cobrem SELECT/UPDATE. Nenhuma alteração necessária.

-- ── 5. View: resumo de subcontas para o painel SaaS admin ─────────────────

CREATE OR REPLACE VIEW public.v_twilio_whatsapp_overview AS
SELECT
  nc.id                          AS channel_id,
  nc.tenant_id,
  nc.owner_id,
  nc.is_active,
  nc.connection_status,
  nc.display_name,
  nc.twilio_subaccount_sid,
  nc.twilio_phone_number,
  nc.twilio_phone_sid,
  nc.cost_per_message_usd,
  nc.price_per_message_brl,
  nc.provisioned_at,
  nc.created_at,
  nc.updated_at,
  -- Uso do mês atual
  COALESCE(u.messages_sent, 0)      AS current_month_sent,
  COALESCE(u.messages_delivered, 0) AS current_month_delivered,
  COALESCE(u.messages_failed, 0)    AS current_month_failed,
  COALESCE(u.cost_usd, 0)           AS current_month_cost_usd,
  COALESCE(u.cost_brl, 0)           AS current_month_cost_brl,
  COALESCE(u.revenue_brl, 0)        AS current_month_revenue_brl,
  COALESCE(u.margin_brl, 0)         AS current_month_margin_brl
FROM public.notification_channels nc
LEFT JOIN public.twilio_subaccount_usage u
  ON  u.channel_id   = nc.id
  AND u.period_start = date_trunc('month', CURRENT_DATE)::date
WHERE nc.channel       = 'whatsapp'
  AND nc.provider      = 'twilio'
  AND nc.deleted_at   IS NULL;

COMMENT ON VIEW public.v_twilio_whatsapp_overview IS
  'Visão consolidada de subcontas Twilio WhatsApp com uso do mês corrente.';