-- PR SMM: каналы и снимки подписчиков
-- Каналы (Telegram, VK, WhatsApp и др.)
CREATE TABLE IF NOT EXISTS pr_smm_channels (
  id                BIGSERIAL PRIMARY KEY,
  name              TEXT NOT NULL,
  type              VARCHAR(20) NOT NULL CHECK (type IN ('tg', 'vk', 'wa', 'other')),
  url               TEXT,
  sort_order        INT NOT NULL DEFAULT 0,
  created_at        TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_pr_smm_channels_sort ON pr_smm_channels(sort_order);

-- Снимки количества подписчиков по дате (история фиксаций)
CREATE TABLE IF NOT EXISTS pr_smm_subscriber_snapshots (
  id                BIGSERIAL PRIMARY KEY,
  channel_id        BIGINT NOT NULL REFERENCES pr_smm_channels(id) ON DELETE CASCADE,
  subscribers_count INT NOT NULL,
  recorded_at       DATE NOT NULL DEFAULT CURRENT_DATE,
  note              TEXT,
  created_at        TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_pr_smm_snapshots_channel ON pr_smm_subscriber_snapshots(channel_id);
CREATE INDEX IF NOT EXISTS idx_pr_smm_snapshots_recorded ON pr_smm_subscriber_snapshots(recorded_at DESC);

COMMENT ON TABLE pr_smm_channels IS 'SMM-каналы УК: Telegram, VK, WhatsApp и др.';
COMMENT ON TABLE pr_smm_subscriber_snapshots IS 'Фиксации количества подписчиков по дате для истории';