-- House tracker: listings from Dutch housing sites, collected by a home worker.
-- Idempotent; safe to run on every deploy.

CREATE TABLE IF NOT EXISTS house_listings (
  id serial PRIMARY KEY,
  source text NOT NULL,
  source_id text NOT NULL,
  external_id text,
  url text NOT NULL,
  offer text NOT NULL CHECK (offer IN ('rent', 'buy')),
  property_type text NOT NULL,
  title text,
  street text,
  postal_code text,
  city text,
  city_slug text,
  neighbourhood text,
  price_eur integer CHECK (price_eur IS NULL OR price_eur >= 0),
  area_m2 integer,
  rooms integer,
  bedrooms integer,
  bathrooms integer,
  construction_year integer,
  energy_label text,
  interior text,
  deposit_eur integer,
  available_from text,
  contract_type text,
  agent text,
  image_url text,
  description text,
  features jsonb NOT NULL DEFAULT '{}'::jsonb,
  lat double precision,
  lng double precision,
  -- When the site says it was published. first_seen_at is when we noticed.
  offered_at timestamptz,
  first_seen_at timestamptz NOT NULL DEFAULT now(),
  -- fast, slow, or seed (already listed when its search was first polled).
  first_seen_lane text NOT NULL DEFAULT 'slow',
  last_seen_at timestamptz NOT NULL DEFAULT now(),
  detail_fetched_at timestamptz,
  removed_at timestamptz,
  alerted_at timestamptz,
  -- Personal tracking.
  status text,
  notes text
);
CREATE UNIQUE INDEX IF NOT EXISTS house_listings_source_idx ON house_listings (source, source_id);
CREATE INDEX IF NOT EXISTS house_listings_active_idx
  ON house_listings (offer, first_seen_at DESC) WHERE removed_at IS NULL;
CREATE INDEX IF NOT EXISTS house_listings_city_idx ON house_listings (source, offer, city_slug);
CREATE INDEX IF NOT EXISTS house_listings_details_idx
  ON house_listings (first_seen_at DESC) WHERE detail_fetched_at IS NULL;

-- Every price we have seen, so price drops and market trends survive edits.
CREATE TABLE IF NOT EXISTS house_price_history (
  listing_id integer NOT NULL REFERENCES house_listings(id) ON DELETE CASCADE,
  observed_at timestamptz NOT NULL DEFAULT now(),
  price_eur integer NOT NULL
);
CREATE INDEX IF NOT EXISTS house_price_history_listing_idx
  ON house_price_history (listing_id, observed_at);

-- One row per polled search URL. The first sync of a search only seeds the
-- database: alerting on everything already listed would be noise.
CREATE TABLE IF NOT EXISTS house_searches (
  search_url text PRIMARY KEY,
  source text NOT NULL,
  lane text NOT NULL,
  first_synced_at timestamptz NOT NULL DEFAULT now(),
  last_synced_at timestamptz NOT NULL DEFAULT now(),
  last_found integer NOT NULL DEFAULT 0
);

-- Worker health: challenges, HTTP errors, parse failures.
CREATE TABLE IF NOT EXISTS house_worker_runs (
  id bigint GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
  source text NOT NULL,
  lane text NOT NULL,
  url text NOT NULL,
  status text NOT NULL,
  http_status integer,
  found integer,
  duration_ms integer,
  message text,
  created_at timestamptz NOT NULL DEFAULT now()
);
CREATE INDEX IF NOT EXISTS house_worker_runs_created_idx ON house_worker_runs (created_at DESC);

CREATE TABLE IF NOT EXISTS house_alert_rules (
  id serial PRIMARY KEY,
  name text NOT NULL,
  enabled boolean NOT NULL DEFAULT true,
  offer text NOT NULL DEFAULT 'rent' CHECK (offer IN ('rent', 'buy')),
  min_price integer,
  max_price integer,
  min_area integer,
  min_bedrooms integer,
  -- Lowercase city names; empty means anywhere.
  cities text[] NOT NULL DEFAULT '{}',
  -- Empty means every property type.
  property_types text[] NOT NULL DEFAULT '{}',
  created_at timestamptz NOT NULL DEFAULT now()
);

INSERT INTO house_alert_rules (name, offer, min_price, max_price, cities)
SELECT 'Gouda area rentals', 'rent', 1300, 1700, ARRAY[
  'gouda', 'waddinxveen', 'reeuwijk', 'moordrecht', 'nieuwerkerk aan den ijssel',
  'zevenhuizen', 'bodegraven', 'boskoop', 'oudewater', 'schoonhoven', 'haastrecht'
]
WHERE NOT EXISTS (SELECT 1 FROM house_alert_rules);