-- ============================================================
-- Materialized view : reporting.mv_interventions
-- Scope : interventions des 12 derniers mois
-- Refresh : via management command refresh_reporting_views (daily)
--
-- Pour recréer manuellement :
--   DROP MATERIALIZED VIEW IF EXISTS reporting.mv_interventions;
--   \i mv_interventions.sql
-- ============================================================

DROP MATERIALIZED VIEW IF EXISTS reporting.mv_interventions;

CREATE MATERIALIZED VIEW reporting.mv_interventions AS
WITH
  -- ── Moment de passage à 'à traiter' ──────────────────────────────────────
  tbe AS (
    SELECT intervention_id, MIN(event_time) AS dt
    FROM django.interventions_interventiontimeline
    WHERE to_status = 'to_be_processed'
    GROUP BY intervention_id
  ),

  -- ── Premier passage à 'pris en charge' ───────────────────────────────────
  first_assigned AS (
    SELECT intervention_id, MIN(event_time) AS dt
    FROM django.interventions_interventiontimeline
    WHERE to_status = 'assigned'
    GROUP BY intervention_id
  ),

  -- ── Premier passage à 'démarré' ──────────────────────────────────────────
  first_ip AS (
    SELECT intervention_id, MIN(event_time) AS dt
    FROM django.interventions_interventiontimeline
    WHERE to_status = 'in_progress'
    GROUP BY intervention_id
  ),

  -- ── Premier passage à 'terminé' ──────────────────────────────────────────
  first_finished AS (
    SELECT intervention_id, MIN(event_time) AS dt
    FROM django.interventions_interventiontimeline
    WHERE to_status = 'finished'
    GROUP BY intervention_id
  ),

  -- ── Premier passage à 'en pause' ou 'terminé' ───────────────────────────
  first_paused_or_finished AS (
    SELECT intervention_id, MIN(event_time) AS dt
    FROM django.interventions_interventiontimeline
    WHERE to_status IN ('on_pause', 'finished')
    GROUP BY intervention_id
  ),

  -- ── Dernier passage à 'terminé' ──────────────────────────────────────────
  last_finished AS (
    SELECT intervention_id, MAX(event_time) AS dt
    FROM django.interventions_interventiontimeline
    WHERE to_status = 'finished'
    GROUP BY intervention_id
  ),

  -- ── Temps d'exécution : somme des segments actifs en 'démarré' ───────────
  -- La n-ième entrée en in_progress est appariée à la n-ième sortie de in_progress
  -- grâce au ROW_NUMBER, ce qui gère correctement les pauses successives.
  ip_starts AS (
    SELECT
      intervention_id,
      event_time,
      ROW_NUMBER() OVER (PARTITION BY intervention_id ORDER BY event_time) AS rn
    FROM django.interventions_interventiontimeline
    WHERE to_status = 'in_progress'
  ),
  ip_ends AS (
    SELECT
      intervention_id,
      event_time,
      ROW_NUMBER() OVER (PARTITION BY intervention_id ORDER BY event_time) AS rn
    FROM django.interventions_interventiontimeline
    WHERE from_status = 'in_progress'
  ),
  exec_time AS (
    SELECT
      s.intervention_id,
      ROUND(
        SUM(EXTRACT(EPOCH FROM (e.event_time - s.event_time)) / 60.0)
      )::INTEGER AS total_minutes
    FROM ip_starts s
    JOIN ip_ends e
      ON  e.intervention_id = s.intervention_id
      AND e.rn              = s.rn
      AND e.event_time      >= s.event_time
    GROUP BY s.intervention_id
  ),

  -- ── Première localisation associée à l'intervention ──────────────────────
  -- On prend la première par id (ordre d'insertion).
  first_loc AS (
    SELECT DISTINCT ON (il.intervention_id)
      il.intervention_id,
      il.content_type_id  AS loc_content_type_id,
      il.object_id        AS loc_object_id,
      ct.app_label        AS loc_app_label,
      ct.model            AS loc_model
    FROM django.interventions_interventionlocation il
    JOIN django.django_content_type ct ON ct.id = il.content_type_id
    ORDER BY il.intervention_id, il.id
  )

SELECT
  -- ── Identité ─────────────────────────────────────────────────────────────
  i.id,
  i.code,
  i.title,
  i.lon,
  i.lat,

  -- ── Thématique ───────────────────────────────────────────────────────────
  i.thematic_id,
  t.name_fr                     AS thematic_name_fr,
  t.name_nl                     AS thematic_name_nl,

  -- ── Catégorie d'asset ────────────────────────────────────────────────────
  i.asset_category_id,
  ac.name_fr                    AS asset_category_name_fr,
  ac.name_nl                    AS asset_category_name_nl,

  -- ── Statut & priorité ────────────────────────────────────────────────────
  i.status,
  i.priority,

  -- ── Catégorie source ─────────────────────────────────────────────────────
  i.source_category_id,
  sc.name_fr                    AS source_category_name_fr,

  -- ── Contrat & ordre ──────────────────────────────────────────────────────
  i.contract_id,
  c.contract_number,
  i.order_id,
  i.created_by_provider,

  -- ── Dimensions maintenance ───────────────────────────────────────────────
  i.maintain_type               AS maintenance_type,
  i.origin_type,
  i.type                        AS intervention_type,

  -- ── Date de création ─────────────────────────────────────────────────────
  i.creation_time,

  -- ── Horodatages bruts des jalons (utiles pour calculs complémentaires) ───
  tbe.dt                        AS dt_to_be_processed,
  fa.dt                         AS dt_first_assigned,
  fip.dt                        AS dt_first_inprogress,
  ffin.dt                       AS dt_first_finished,
  lfin.dt                       AS dt_last_finished,

  -- ── Métriques de temps en minutes entières (NULL si statut non atteint) ──

  -- Temps de prise en charge : 'à traiter' → 'pris en charge'
  CASE
    WHEN fa.dt IS NOT NULL AND tbe.dt IS NOT NULL
    THEN ROUND(EXTRACT(EPOCH FROM (fa.dt   - tbe.dt)) / 60.0)::INTEGER
  END                           AS response_time_min,

  -- Temps d'intervention : 'à traiter' → premier 'démarré'
  CASE
    WHEN fip.dt IS NOT NULL AND tbe.dt IS NOT NULL
    THEN ROUND(EXTRACT(EPOCH FROM (fip.dt  - tbe.dt)) / 60.0)::INTEGER
  END                           AS time_to_inprogress_min,

  -- Premier temps de réalisation : 'à traiter' → premier 'en pause' ou 'terminé'
  CASE
    WHEN fpof.dt IS NOT NULL AND tbe.dt IS NOT NULL
    THEN ROUND(EXTRACT(EPOCH FROM (fpof.dt - tbe.dt)) / 60.0)::INTEGER
  END                           AS first_resolution_min,

  -- Temps de réalisation final  : 'à traiter' → dernier 'terminé'
  CASE
    WHEN lfin.dt IS NOT NULL AND tbe.dt IS NOT NULL
    THEN ROUND(EXTRACT(EPOCH FROM (lfin.dt - tbe.dt)) / 60.0)::INTEGER
  END                           AS final_resolution_min,

  -- Temps d'exécution : somme des durées actives en 'démarré'
  exec_t.total_minutes          AS execution_time_min,

  -- ── Localisation (GenericFK décodée) ─────────────────────────────────────
  fl.loc_content_type_id,
  fl.loc_object_id,
  fl.loc_app_label,
  fl.loc_model

FROM django.interventions_intervention i
LEFT JOIN django.common_thematic              t      ON t.id   = i.thematic_id
LEFT JOIN django.assets_assetcategory         ac     ON ac.id  = i.asset_category_id
LEFT JOIN django.interventions_sourcecategory sc     ON sc.id  = i.source_category_id
LEFT JOIN django.contracts_contract           c      ON c.id   = i.contract_id
LEFT JOIN tbe                                 ON tbe.intervention_id   = i.id
LEFT JOIN first_assigned               fa     ON fa.intervention_id    = i.id
LEFT JOIN first_ip                     fip    ON fip.intervention_id   = i.id
LEFT JOIN first_finished               ffin   ON ffin.intervention_id  = i.id
LEFT JOIN first_paused_or_finished     fpof   ON fpof.intervention_id  = i.id
LEFT JOIN last_finished                lfin   ON lfin.intervention_id  = i.id
LEFT JOIN exec_time                    exec_t ON exec_t.intervention_id = i.id
LEFT JOIN first_loc                    fl     ON fl.intervention_id    = i.id

WHERE (
    SELECT MIN(tl.event_time)
    FROM django.interventions_interventiontimeline tl
    WHERE tl.intervention_id = i.id
) > NOW() - INTERVAL '12 months'

WITH DATA;

-- ── Index unique requis pour REFRESH MATERIALIZED VIEW CONCURRENTLY ─────────
CREATE UNIQUE INDEX reporting_mv_interventions_pk
    ON reporting.mv_interventions (id);

-- ── Index opérationnels ──────────────────────────────────────────────────────
CREATE INDEX reporting_mv_interventions_creation
    ON reporting.mv_interventions (creation_time);

CREATE INDEX reporting_mv_interventions_thematic
    ON reporting.mv_interventions (thematic_id);

CREATE INDEX reporting_mv_interventions_status
    ON reporting.mv_interventions (status);

CREATE INDEX reporting_mv_interventions_contract
    ON reporting.mv_interventions (contract_id);

CREATE INDEX reporting_mv_interventions_loc
    ON reporting.mv_interventions (loc_content_type_id, loc_object_id);