-- 064: Phase C — Avito IMV per-house backfill schema.
-- Idempotent: re-run safe (IF NOT EXISTS).
BEGIN;

-- Track IMV scrape state per house (resumable backfill)
ALTER TABLE houses
  ADD COLUMN IF NOT EXISTS imv_status text NOT NULL DEFAULT 'pending',
  ADD COLUMN IF NOT EXISTS last_imv_attempt_at timestamptz,
  ADD COLUMN IF NOT EXISTS imv_error_reason text;

CREATE INDEX IF NOT EXISTS houses_imv_status_idx
  ON houses(imv_status, last_imv_attempt_at NULLS FIRST)
  WHERE imv_status IN ('pending', 'transient_error');

-- House-level IMV evaluation result (1:1 with houses, latest fetch)
CREATE TABLE IF NOT EXISTS house_imv_evaluations (
    id                bigserial PRIMARY KEY,
    house_id          bigint NOT NULL REFERENCES houses(id) ON DELETE CASCADE,
    cache_key         text,
    recommended_price bigint,
    lower_price       bigint,
    higher_price      bigint,
    market_count      integer,
    raw_response      jsonb,
    fetched_at        timestamptz NOT NULL DEFAULT NOW(),
    -- Lot-params used (median from listings or default)
    rooms             integer,
    area_m2           numeric(8,2),
    floor             integer,
    floor_at_home     integer,
    house_type        text,
    renovation_type   text,
    has_balcony       boolean,
    has_loggia        boolean
);

CREATE UNIQUE INDEX IF NOT EXISTS house_imv_eval_house_uniq_idx
  ON house_imv_evaluations(house_id);
CREATE INDEX IF NOT EXISTS house_imv_eval_fetched_idx
  ON house_imv_evaluations(fetched_at DESC);

-- Avito suggestions[] per house — 8 similar lots nearby
CREATE TABLE IF NOT EXISTS house_suggestions (
    id                bigserial PRIMARY KEY,
    house_id          bigint NOT NULL REFERENCES houses(id) ON DELETE CASCADE,
    ext_item_id       text NOT NULL,           -- Avito item id
    title             text,
    address           text,
    price_rub         bigint,
    area_m2           numeric(8,2),
    rooms             integer,
    floor             integer,
    total_floors      integer,
    exposure_days     integer,
    publish_date      date,
    item_link         text,
    image_link        text,
    metro_name        text,
    metro_distance    text,
    has_good_price_badge boolean,
    raw_payload       jsonb,
    fetched_at        timestamptz NOT NULL DEFAULT NOW()
);

CREATE UNIQUE INDEX IF NOT EXISTS house_suggestions_uniq_idx
  ON house_suggestions(house_id, ext_item_id);
CREATE INDEX IF NOT EXISTS house_suggestions_house_idx
  ON house_suggestions(house_id, fetched_at DESC);

-- Verify
DO $$
DECLARE
  pending_n bigint;
BEGIN
  SELECT count(*) INTO pending_n FROM houses WHERE imv_status = 'pending';
  RAISE NOTICE 'migration 064: % houses pending IMV backfill', pending_n;
END $$;

COMMIT;