-- 15_map_exclude_cost_centres.sql
-- Hide non-operational vehicles from the LIVE tracking map (FleetNow + liveposition SPA).
--
-- A small, ops-editable config table lists the cost centres to exclude. reporting.v_live_positions
-- (the base view behind reporting.fn_live_positions, which dashboard_api serves) filters out any
-- plate whose device(s) carry an excluded cost centre. Editing the table changes the map on the
-- next query — no code change, no redeploy.
--
-- Scope: LIVE map only. Trip history (reporting.v_trips materialised view) is deliberately NOT
-- touched. Initial exclusions: personal + management (staff/personal cars) and mtn (the MTN
-- contract / Uganda-Kampala fleet, outside Kenyan ops).
--
-- The v_live_positions body below is reproduced verbatim from the live prod definition
-- (== migrations/11_reporting_schema.sql) with a single added filter in the primary_device CTE.
-- Safe to re-apply (CREATE TABLE IF NOT EXISTS / INSERT ON CONFLICT / CREATE OR REPLACE VIEW).

SET search_path = tracksolid, reporting, public;

-- ── exclusion config (data-driven, editable without a migration) ──────────────
CREATE TABLE IF NOT EXISTS reporting.map_excluded_cost_centres (
  cost_centre text PRIMARY KEY,            -- compared case-insensitively (store lowercase)
  note        text,
  added_at    timestamptz NOT NULL DEFAULT now()
);

INSERT INTO reporting.map_excluded_cost_centres (cost_centre, note) VALUES
  ('personal',   'staff/personal vehicles — not operational fleet'),
  ('management', 'management vehicles — not operational fleet'),
  ('mtn',        'MTN contract / Uganda (Kampala) — outside Kenyan ops')
ON CONFLICT (cost_centre) DO NOTHING;

-- ── v_live_positions: same definition + exclusion filter ──────────────────────
CREATE OR REPLACE VIEW reporting.v_live_positions AS
 WITH primary_device AS (
         SELECT DISTINCT ON ((reporting.normalize_plate(d_1.vehicle_number))) reporting.normalize_plate(d_1.vehicle_number) AS vehicle_number,
            d_1.imei AS primary_imei
           FROM devices d_1
             LEFT JOIN live_positions lp_1 ON lp_1.imei = d_1.imei
          WHERE d_1.vehicle_number IS NOT NULL AND d_1.enabled_flag = 1
            -- exclude plates whose device(s) carry a non-operational cost centre
            AND reporting.normalize_plate(d_1.vehicle_number) NOT IN (
                  SELECT reporting.normalize_plate(x.vehicle_number)
                  FROM devices x
                  WHERE x.vehicle_number IS NOT NULL
                    AND lower(trim(x.cost_centre)) IN (
                          SELECT cost_centre FROM reporting.map_excluded_cost_centres)
                )
          ORDER BY (reporting.normalize_plate(d_1.vehicle_number)), (
                CASE
                    WHEN (d_1.mc_type = ANY (ARRAY['GT06E'::text, 'X3'::text, 'AT4'::text])) AND lp_1.gps_time >= (now() - '24:00:00'::interval) THEN 0
                    ELSE 1
                END), lp_1.gps_time DESC NULLS LAST, (
                CASE d_1.mc_type
                    WHEN 'GT06E'::text THEN 1
                    WHEN 'X3'::text THEN 2
                    WHEN 'AT4'::text THEN 3
                    WHEN 'JC400P'::text THEN 4
                    ELSE 5
                END), d_1.activation_time, d_1.imei
        )
 SELECT lp.imei,
    pd.vehicle_number,
    d.driver_name AS assigned_driver,
    d.cost_centre,
    d.assigned_city,
    d.vehicle_category,
    d.vehicle_models,
    d.mc_type,
        CASE d.mc_type
            WHEN 'GT06E'::text THEN 'tracker'::text
            WHEN 'X3'::text THEN 'tracker'::text
            WHEN 'AT4'::text THEN 'tracker'::text
            WHEN 'JC400P'::text THEN 'camera'::text
            ELSE 'other'::text
        END AS device_kind,
    lp.lat,
    lp.lng,
    lp.speed,
    lp.direction,
    lp.acc_status,
    lp.device_status,
    lp.gps_signal,
    lp.gps_num,
    lp.current_mileage,
    lp.loc_desc,
    lp.gps_time,
    lp.updated_at,
    (lp.gps_time AT TIME ZONE 'Africa/Nairobi'::text) AS gps_time_eat,
    (lp.updated_at AT TIME ZONE 'Africa/Nairobi'::text) AS updated_at_eat,
    round(EXTRACT(epoch FROM now() - lp.gps_time) / 3600::numeric, 2) AS source_age_hours
   FROM live_positions lp
     JOIN primary_device pd ON pd.primary_imei = lp.imei
     JOIN devices d ON d.imei = lp.imei;

COMMENT ON TABLE reporting.map_excluded_cost_centres IS
  'Cost centres hidden from the live map (reporting.v_live_positions). Edit to hide/restore; '
  'effective on next query. Seeded: personal, management, mtn. See migration 15.';

-- ── grants (guarded: roles may not exist on a fresh DB) ───────────────────────
DO $grants$
BEGIN
  IF EXISTS (SELECT 1 FROM pg_roles WHERE rolname = 'grafana_ro') THEN
    GRANT SELECT ON reporting.map_excluded_cost_centres TO grafana_ro;
  END IF;
END $grants$;