-- 90_user_weight_profiles.sql
-- User-defined POI weight profiles для site_finder/analyze_parcel.
-- Per #114 (Макс feedback): разные веса для разных категорий (садики ≠ Мегамарт).
--
-- Apply order: после 89_drop_dead_brin_rosreestr_deals.sql
-- Dependencies: нет (standalone table, no FK to other tables)
--
-- POI categories compatible with _POI_WEIGHTS in backend/app/api/v1/parcels.py:
--   school, kindergarten, pharmacy, hospital, shop_mall, shop_supermarket,
--   shop_small, park, bus_stop, metro_stop, tram_stop
--
-- Idempotent: safe to run multiple times.

BEGIN;

CREATE TABLE IF NOT EXISTS user_weight_profiles (
    id           SERIAL PRIMARY KEY,
    user_id      TEXT NOT NULL,  -- пока admin token / простой ID; auth в Sprint 5
    profile_name TEXT NOT NULL,
    weights      JSONB NOT NULL DEFAULT '{}'::jsonb,
    is_default   BOOLEAN NOT NULL DEFAULT FALSE,
    description  TEXT,
    created_at   TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at   TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    UNIQUE (user_id, profile_name)
);

CREATE INDEX IF NOT EXISTS user_weight_profiles_user_idx
    ON user_weight_profiles (user_id);

-- Partial index для быстрого fetch default profile per user
CREATE INDEX IF NOT EXISTS user_weight_profiles_default_idx
    ON user_weight_profiles (user_id) WHERE is_default = TRUE;

-- Trigger function для auto-update updated_at (shared, reusable across tables)
CREATE OR REPLACE FUNCTION set_updated_at() RETURNS TRIGGER AS $$
BEGIN
    NEW.updated_at = NOW();
    RETURN NEW;
END;
$$ LANGUAGE plpgsql;

-- Drop trigger если ранее существовал (idempotent)
DROP TRIGGER IF EXISTS user_weight_profiles_updated_at ON user_weight_profiles;
CREATE TRIGGER user_weight_profiles_updated_at
    BEFORE UPDATE ON user_weight_profiles
    FOR EACH ROW EXECUTE FUNCTION set_updated_at();

COMMENT ON TABLE user_weight_profiles IS
    'POI weight profiles для site_finder. Per #114 (Макс feedback). '
    'weights = {"school": 1.5, "kindergarten": 1.5, "shop_mall": 1.2, ...}';

COMMENT ON COLUMN user_weight_profiles.weights IS
    'JSONB map: poi_category → weight (float, typically -1.5..2.5). '
    'Совместимо с _POI_WEIGHTS default в backend/app/api/v1/parcels.py. '
    'Категории: school, kindergarten, pharmacy, hospital, shop_mall, '
    'shop_supermarket, shop_small, park, bus_stop, metro_stop, tram_stop.';

COMMENT ON COLUMN user_weight_profiles.user_id IS
    'Простой строковый ID пользователя. Full auth integration — Sprint 5.';

COMMENT ON COLUMN user_weight_profiles.is_default IS
    'TRUE = профиль используется по умолчанию для этого user_id. '
    'Partial index user_weight_profiles_default_idx ускоряет lookup.';

COMMIT;