backend/database/migrations/070_website_page_view_counters.sql

-- Expand page-view kinds, rename events table, add lifetime counters.
-- Events retained max 6 months (purged by Nest cron). Counters kept forever.

DO $$
BEGIN
  IF NOT EXISTS (SELECT 1 FROM pg_type WHERE typname = 'website_page_kind') THEN
    CREATE TYPE website_page_kind AS ENUM (
      'home',
      'portfolio_list',
      'portfolio_detail',
      'product_list',
      'product_detail',
      'store_item_list',
      'store_item_detail',
      'blog_list',
      'blog_detail',
      'video_list',
      'video_detail'
    );
  END IF;
END $$;

-- Recreate events table with new kind enum (table is empty / low volume today).
CREATE TABLE IF NOT EXISTS website_page_views (
  id          BIGSERIAL PRIMARY KEY,
  business_id BIGINT NOT NULL REFERENCES businesses (id) ON DELETE CASCADE,
  page_kind   website_page_kind NOT NULL,
  entity_id   BIGINT NOT NULL DEFAULT 0,
  page_path   TEXT,
  viewed_at   TIMESTAMPTZ NOT NULL DEFAULT now()
);

CREATE INDEX IF NOT EXISTS idx_website_page_views_business_kind_time
  ON website_page_views (business_id, page_kind, viewed_at DESC);

-- Copy any legacy rows from website_content_views
DO $$
BEGIN
  IF EXISTS (
    SELECT 1 FROM information_schema.tables
    WHERE table_schema = 'public' AND table_name = 'website_content_views'
  ) THEN
    INSERT INTO website_page_views (business_id, page_kind, entity_id, page_path, viewed_at)
    SELECT
      business_id,
      CASE view_kind::text
        WHEN 'website' THEN 'home'::website_page_kind
        WHEN 'product' THEN 'product_detail'::website_page_kind
        WHEN 'portfolio' THEN 'portfolio_detail'::website_page_kind
        WHEN 'blog' THEN 'blog_detail'::website_page_kind
        ELSE 'home'::website_page_kind
      END,
      COALESCE(entity_id, 0),
      page_path,
      viewed_at
    FROM website_content_views;

    DROP TABLE website_content_views;
  END IF;
END $$;

DROP TYPE IF EXISTS website_view_kind;

CREATE TABLE IF NOT EXISTS website_page_view_counters (
  id          BIGSERIAL PRIMARY KEY,
  business_id BIGINT NOT NULL REFERENCES businesses (id) ON DELETE CASCADE,
  page_kind   website_page_kind NOT NULL,
  entity_id   BIGINT NOT NULL DEFAULT 0,
  total_count BIGINT NOT NULL DEFAULT 0,
  updated_at  TIMESTAMPTZ NOT NULL DEFAULT now(),
  CONSTRAINT uq_website_page_view_counters_biz_kind_entity
    UNIQUE (business_id, page_kind, entity_id)
);

CREATE INDEX IF NOT EXISTS idx_website_page_view_counters_business_kind
  ON website_page_view_counters (business_id, page_kind);