-- ============================================================
-- Materialized view : reporting.mv_location_hierarchy
-- Scope  : toutes les localisations actives de tous les types,
--          avec résolution de la hiérarchie (parent → root).
-- Refresh : via management command refresh_reporting_views (daily)
--
-- Clé de jointure avec mv_interventions :
--   mv_interventions.loc_content_type_id = mv_location_hierarchy.content_type_id
--   mv_interventions.loc_object_id       = mv_location_hierarchy.object_id
--
-- Types de localisation couverts :
--   trafficlightintersection  (assets_trafficlightintersection)
--   structurelocation         (assets_structurelocation)  — groupé par ouvrage
--   itslocation               (assets_itslocation)
--   naturelocation            (assets_naturelocation)
--   publiclightingstreet      (assets_publiclightingstreet)
--   cleanlocation             (assets_cleanlocation)
--   controlcenterlocation     (assets_controlcenterlocation)
--   signstreet                (sign_signstreet)
-- ============================================================

DROP MATERIALIZED VIEW IF EXISTS reporting.mv_location_hierarchy;

CREATE MATERIALIZED VIEW reporting.mv_location_hierarchy AS
WITH RECURSIVE

  -- ── Résolution des content_type IDs (une seule fois) ───────────────────
  ct (ct_id, model) AS (
    SELECT id AS ct_id, model
    FROM django_content_type
    WHERE (app_label = 'assets' AND model IN (
             'trafficlightintersection',
             'structurelocation',
             'itslocation',
             'naturelocation',
             'publiclightingstreet',
             'cleanlocation',
             'controlcenterlocation'))
       OR (app_label = 'sign' AND model = 'signstreet')
  ),

  -- ── Hiérarchie récursive : ITS Locations ───────────────────────────────
  its_root (id, root_id) AS (
    -- Racines : localisations sans parent
    SELECT id, id AS root_id
    FROM assets_itslocation
    WHERE parent_location_id IS NULL
    -- Enfants : on remonte jusqu'à la racine
    UNION ALL
    SELECT child.id, parent.root_id
    FROM assets_itslocation child
    JOIN its_root parent ON parent.id = child.parent_location_id
  ),

  -- ── Hiérarchie récursive : Nature Locations ────────────────────────────
  nature_root (id, root_id) AS (
    SELECT id, id AS root_id
    FROM assets_naturelocation
    WHERE parent_location_id IS NULL
    UNION ALL
    SELECT child.id, parent.root_id
    FROM assets_naturelocation child
    JOIN nature_root parent ON parent.id = child.parent_location_id
  ),

  -- ── Hiérarchie récursive : Control Center Locations ───────────────────
  cc_root (id, root_id) AS (
    SELECT id, id AS root_id
    FROM assets_controlcenterlocation
    WHERE parent_location_id IS NULL
    UNION ALL
    SELECT child.id, parent.root_id
    FROM assets_controlcenterlocation child
    JOIN cc_root parent ON parent.id = child.parent_location_id
  )

-- ── Traffic Light Intersections ─────────────────────────────────────────────
-- Niveau de regroupement : l'intersection elle-même (ou son maître si défini).
SELECT
  (SELECT ct_id FROM ct WHERE model = 'trafficlightintersection')  AS content_type_id,
  tli.id                                                           AS object_id,
  'trafficlightintersection'                                       AS location_type,
  tli.code,
  tli.name_fr,
  tli.name_nl,
  tli.lon,
  tli.lat,
  -- Parent : intersection maître (peut être NULL)
  (SELECT ct_id FROM ct WHERE model = 'trafficlightintersection')  AS parent_content_type_id,
  tli.master_id                                                    AS parent_object_id,
  -- Root : soi-même (les intersections sont le niveau atomique de regroupement)
  (SELECT ct_id FROM ct WHERE model = 'trafficlightintersection')  AS root_content_type_id,
  tli.id                                                           AS root_object_id,
  tli.code                                                         AS root_code,
  tli.name_fr                                                      AS root_name_fr,
  tli.name_nl                                                      AS root_name_nl,
  mun.name_fr                                                      AS municipality_name_fr,
  mun.name_nl                                                      AS municipality_name_nl
FROM assets_trafficlightintersection tli
LEFT JOIN common_municipality mun ON mun.id = tli.municipality_id

UNION ALL

-- ── Structure Locations ─────────────────────────────────────────────────────
-- Regroupement par ouvrage (Structure) ; root = localisation principale de l'ouvrage.
SELECT
  (SELECT ct_id FROM ct WHERE model = 'structurelocation'),
  sl.id,
  'structurelocation',
  sl.code,
  sl.name_fr,
  sl.name_nl,
  sl.lon,
  sl.lat,
  (SELECT ct_id FROM ct WHERE model = 'structurelocation'),
  sl.parent_location_id,
  (SELECT ct_id FROM ct WHERE model = 'structurelocation'),
  COALESCE(
    (SELECT id FROM assets_structurelocation
     WHERE structure_id = sl.structure_id
       AND is_main_location = TRUE
     LIMIT 1),
    sl.id
  )                                                                AS root_object_id,
  COALESCE(s.code,    sl.code)                                    AS root_code,
  COALESCE(s.name_fr, sl.name_fr)                                 AS root_name_fr,
  COALESCE(s.name_nl, sl.name_nl)                                 AS root_name_nl,
  NULL::VARCHAR                                                    AS municipality_name_fr,
  NULL::VARCHAR                                                    AS municipality_name_nl
FROM assets_structurelocation sl
LEFT JOIN assets_structure s ON s.id = sl.structure_id

UNION ALL

-- ── ITS Locations ────────────────────────────────────────────────────────────
SELECT
  (SELECT ct_id FROM ct WHERE model = 'itslocation'),
  il.id,
  'itslocation',
  il.code,
  il.name_fr,
  il.name_nl,
  il.lon,
  il.lat,
  (SELECT ct_id FROM ct WHERE model = 'itslocation'),
  il.parent_location_id,
  (SELECT ct_id FROM ct WHERE model = 'itslocation'),
  ir.root_id,
  root_il.code,
  root_il.name_fr,
  root_il.name_nl,
  NULL::VARCHAR,
  NULL::VARCHAR
FROM assets_itslocation il
JOIN its_root ir ON ir.id = il.id
JOIN assets_itslocation root_il ON root_il.id = ir.root_id

UNION ALL

-- ── Nature Locations ─────────────────────────────────────────────────────────
SELECT
  (SELECT ct_id FROM ct WHERE model = 'naturelocation'),
  nl.id,
  'naturelocation',
  nl.code,
  nl.name_fr,
  nl.name_nl,
  nl.lon,
  nl.lat,
  (SELECT ct_id FROM ct WHERE model = 'naturelocation'),
  nl.parent_location_id,
  (SELECT ct_id FROM ct WHERE model = 'naturelocation'),
  nr.root_id,
  root_nl.code,
  root_nl.name_fr,
  root_nl.name_nl,
  mun.name_fr,
  mun.name_nl
FROM assets_naturelocation nl
JOIN nature_root nr ON nr.id = nl.id
JOIN assets_naturelocation root_nl ON root_nl.id = nr.root_id
LEFT JOIN common_municipality mun ON mun.id = nl.municipality_id

UNION ALL

-- ── Public Lighting Streets ──────────────────────────────────────────────────
SELECT
  (SELECT ct_id FROM ct WHERE model = 'publiclightingstreet'),
  pls.id,
  'publiclightingstreet',
  pls.code,
  pls.name_fr,
  pls.name_nl,
  pls.lon,
  pls.lat,
  NULL::INTEGER,
  NULL::INTEGER,
  (SELECT ct_id FROM ct WHERE model = 'publiclightingstreet'),
  pls.id,
  pls.code,
  pls.name_fr,
  pls.name_nl,
  mun.name_fr,
  mun.name_nl
FROM assets_publiclightingstreet pls
LEFT JOIN common_municipality mun ON mun.id = pls.municipality_id

UNION ALL

-- ── Clean Locations ───────────────────────────────────────────────────────────
SELECT
  (SELECT ct_id FROM ct WHERE model = 'cleanlocation'),
  cl.id,
  'cleanlocation',
  cl.code,
  cl.name_fr,
  cl.name_nl,
  cl.lon,
  cl.lat,
  NULL::INTEGER,
  NULL::INTEGER,
  (SELECT ct_id FROM ct WHERE model = 'cleanlocation'),
  cl.id,
  cl.code,
  cl.name_fr,
  cl.name_nl,
  mun.name_fr,
  mun.name_nl
FROM assets_cleanlocation cl
LEFT JOIN common_municipality mun ON mun.id = cl.municipality_id

UNION ALL

-- ── Control Center Locations ─────────────────────────────────────────────────
SELECT
  (SELECT ct_id FROM ct WHERE model = 'controlcenterlocation'),
  ccl.id,
  'controlcenterlocation',
  ccl.code,
  ccl.name_fr,
  ccl.name_nl,
  ccl.lon,
  ccl.lat,
  (SELECT ct_id FROM ct WHERE model = 'controlcenterlocation'),
  ccl.parent_location_id,
  (SELECT ct_id FROM ct WHERE model = 'controlcenterlocation'),
  ccr.root_id,
  root_ccl.code,
  root_ccl.name_fr,
  root_ccl.name_nl,
  NULL::VARCHAR,
  NULL::VARCHAR
FROM assets_controlcenterlocation ccl
JOIN cc_root ccr ON ccr.id = ccl.id
JOIN assets_controlcenterlocation root_ccl ON root_ccl.id = ccr.root_id

UNION ALL

-- ── Sign Streets ─────────────────────────────────────────────────────────────
SELECT
  (SELECT ct_id FROM ct WHERE model = 'signstreet'),
  ss.id,
  'signstreet',
  ss.code,
  ss.name_fr,
  ss.name_nl,
  ss.lon,
  ss.lat,
  NULL::INTEGER,
  NULL::INTEGER,
  (SELECT ct_id FROM ct WHERE model = 'signstreet'),
  ss.id,
  ss.code,
  ss.name_fr,
  ss.name_nl,
  mun.name_fr,
  mun.name_nl
FROM sign_signstreet ss
LEFT JOIN common_municipality mun ON mun.id = ss.municipality_id

WITH DATA;

-- ── Index unique requis pour REFRESH MATERIALIZED VIEW CONCURRENTLY ─────────
CREATE UNIQUE INDEX reporting_mv_location_hierarchy_pk
    ON reporting.mv_location_hierarchy (content_type_id, object_id);

-- ── Index opérationnels ──────────────────────────────────────────────────────
CREATE INDEX reporting_mv_location_hierarchy_type
    ON reporting.mv_location_hierarchy (location_type);

CREATE INDEX reporting_mv_location_hierarchy_root
    ON reporting.mv_location_hierarchy (root_content_type_id, root_object_id);