-- =====================================================================
-- 057 — Controlli periodici (control monitoring con frequenza + esecuzioni + NC/AC)
-- =====================================================================
-- Registro dei controlli RICORRENTI con frequenza, owner e metodo; ogni
-- ESECUZIONE è registrata (data, esito, note, evidenze su evidence_files) =
-- EVIDENZA del monitoraggio periodico (ISO 27001 §9.1 / A.8.16; buona prassi,
-- non obbligo). Da un esito non conforme si genera una NC o un'azione correttiva
-- (riuso non_conformities/capa_actions). Distinto da: compliance_controls
-- (registro stato), review_schedule (cadenza generica), internal_audits (audit
-- puntuale). Vedi docs/DESIGN_CONTROLLI_PERIODICI.md.
--
-- Additivo, reversibile. Runner-safe: CREATE TABLE IF NOT EXISTS con FK inline;
-- l'ALTER dell'ENUM non_conformities.source è applicata dal seeder idempotente
-- (preservando i valori) — application/cli/seed_periodic_controls.php.
-- =====================================================================

CREATE TABLE IF NOT EXISTS periodic_controls (
  id              INT NOT NULL AUTO_INCREMENT,
  organization_id INT NOT NULL,
  code            VARCHAR(20) NULL,                 -- CTL-NNN per org
  title           VARCHAR(255) NOT NULL,
  description     TEXT NULL,
  category        VARCHAR(100) NULL,
  control_ref     VARCHAR(32) NULL,                 -- codice SoA/NIS2 collegato (es. A.8.13)
  owner_role_id   INT NULL,                         -- responsabile (org_roles)
  frequency       ENUM('giornaliero','settimanale','mensile','trimestrale','semestrale','annuale','custom') NOT NULL DEFAULT 'mensile',
  frequency_days  INT NULL,                         -- usato se frequency='custom'
  method          TEXT NULL,                        -- metodologia di verifica
  next_due_date   DATE NULL,
  last_executed_at DATE NULL,
  status          ENUM('active','suspended') NOT NULL DEFAULT 'active',
  created_by      INT NULL,
  created_at      DATETIME DEFAULT CURRENT_TIMESTAMP,
  updated_at      DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  KEY idx_pctl_org (organization_id),
  KEY idx_pctl_due (organization_id, next_due_date),
  CONSTRAINT fk_pctl_org   FOREIGN KEY (organization_id) REFERENCES organizations (id) ON DELETE CASCADE,
  CONSTRAINT fk_pctl_role  FOREIGN KEY (owner_role_id) REFERENCES org_roles (id) ON DELETE SET NULL,
  CONSTRAINT fk_pctl_user  FOREIGN KEY (created_by) REFERENCES users (id) ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS periodic_control_executions (
  id            INT NOT NULL AUTO_INCREMENT,
  control_id    INT NOT NULL,
  executed_at   DATE NOT NULL,
  executed_by   INT NULL,
  outcome       ENUM('conforme','non_conforme','parziale','non_applicabile') NOT NULL DEFAULT 'conforme',
  notes         TEXT NULL,
  ncr_id        INT NULL,                           -- NC eventualmente generata
  created_at    DATETIME DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  KEY idx_pcexec_control (control_id),
  CONSTRAINT fk_pcexec_control FOREIGN KEY (control_id) REFERENCES periodic_controls (id) ON DELETE CASCADE,
  CONSTRAINT fk_pcexec_user    FOREIGN KEY (executed_by) REFERENCES users (id) ON DELETE SET NULL,
  CONSTRAINT fk_pcexec_ncr     FOREIGN KEY (ncr_id) REFERENCES non_conformities (id) ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- ALTER non_conformities.source: aggiunge 'monitoring' (eseguita dal seeder, idempotente).
-- ALTER TABLE non_conformities MODIFY COLUMN source ENUM('assessment','audit','incident','supplier_review','management_review','external_audit','monitoring','other') NOT NULL DEFAULT 'assessment';

-- ROLLBACK (manuale):
-- DROP TABLE IF EXISTS periodic_control_executions
-- DROP TABLE IF EXISTS periodic_controls
-- (non_conformities.source: rimuovere 'monitoring' dall'ENUM dopo aver riclassificato le NC relative)