-- =====================================================================
-- 052 — Attività stakeholder: questionari tipo + attività + calendario (Epic C / C5.2a)
-- =====================================================================
-- Simon C5 §4: a ogni stakeholder si possono assegnare ATTIVITA' (questionari
-- da compilare, richieste di firma di avvenuta lettura, o azioni), pianificabili
-- su un calendario NIS2. Questa migrazione (C5.2a) crea la FONDAZIONE:
--   - questionari tipo (template) con domande + m2m a procedure e misure/requisiti
--   - attività + assegnazione (per codice stakeholder o per singoli)
--   - destinatari (target) con token magic-link per il portale esterno (C5.2b)
-- La sotto-dashboard feedback (risposte/firma, commenti, allegati) e il portale
-- esterno arrivano in C5.2b (mig.053).
--
-- Calendario: si RIUSA review_schedule (mig.044) aggiungendo il valore
-- 'stakeholder_activity' all'ENUM entity_type (ALTER MODIFY, idempotente in
-- effetto: re-eseguibile senza errore).
--
-- Ancoraggio: GV.SC-02 (ruoli/responsabilità verso terze parti), GV.SC-05/07
-- (requisiti negli accordi, monitoraggio nel tempo) -> art. 24 D.Lgs. 138/2024.
--
-- Additivo, reversibile. Runner-safe: CREATE TABLE IF NOT EXISTS con FK dentro
-- il CREATE; nessun DELIMITER/stored-procedure; nessun ';' nei commenti.
-- Dati: nessun seed di sistema (i template sono per-org). DDL eseguita dal CLI
-- idempotente application/cli/seed_stakeholder_activities.php.
-- =====================================================================

-- 1) Questionari tipo (template)
CREATE TABLE IF NOT EXISTS stk_questionnaire_templates (
  id              INT NOT NULL AUTO_INCREMENT,
  organization_id INT NOT NULL,
  name            VARCHAR(255) NOT NULL,
  kind            ENUM('questionnaire','read_ack') NOT NULL DEFAULT 'questionnaire',
  description     TEXT NULL,
  content         TEXT NULL,                 -- testo da leggere (per kind=read_ack)
  questions       JSON NULL,                 -- per kind=questionnaire: [{code,text,type,options,required}]
  status          ENUM('draft','active','archived') 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_stkqt_org (organization_id),
  CONSTRAINT fk_stkqt_org  FOREIGN KEY (organization_id) REFERENCES organizations (id) ON DELETE CASCADE,
  CONSTRAINT fk_stkqt_user FOREIGN KEY (created_by) REFERENCES users (id) ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- 2) m2m template -> procedure (policies)
CREATE TABLE IF NOT EXISTS stk_template_procedures (
  template_id INT NOT NULL,
  policy_id   INT NOT NULL,
  PRIMARY KEY (template_id, policy_id),
  KEY idx_stktp_policy (policy_id),
  CONSTRAINT fk_stktp_tpl    FOREIGN KEY (template_id) REFERENCES stk_questionnaire_templates (id) ON DELETE CASCADE,
  CONSTRAINT fk_stktp_policy FOREIGN KEY (policy_id) REFERENCES policies (id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- 3) m2m template -> misure (cfg_nis2_misure.misura_code)
CREATE TABLE IF NOT EXISTS stk_template_misure (
  template_id INT NOT NULL,
  misura_code VARCHAR(16) NOT NULL,
  PRIMARY KEY (template_id, misura_code),
  KEY idx_stktm_misura (misura_code),
  CONSTRAINT fk_stktm_tpl    FOREIGN KEY (template_id) REFERENCES stk_questionnaire_templates (id) ON DELETE CASCADE,
  CONSTRAINT fk_stktm_misura FOREIGN KEY (misura_code) REFERENCES cfg_nis2_misure (misura_code) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- 4) m2m template -> requisiti (cfg_nis2_requisiti.id)
CREATE TABLE IF NOT EXISTS stk_template_requisiti (
  template_id  INT NOT NULL,
  requisito_id INT NOT NULL,
  PRIMARY KEY (template_id, requisito_id),
  KEY idx_stktr_req (requisito_id),
  CONSTRAINT fk_stktr_tpl FOREIGN KEY (template_id) REFERENCES stk_questionnaire_templates (id) ON DELETE CASCADE,
  CONSTRAINT fk_stktr_req FOREIGN KEY (requisito_id) REFERENCES cfg_nis2_requisiti (id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- 5) Attività
CREATE TABLE IF NOT EXISTS stk_activities (
  id              INT NOT NULL AUTO_INCREMENT,
  organization_id INT NOT NULL,
  title           VARCHAR(255) NOT NULL,
  type            ENUM('questionnaire','read_ack','action') NOT NULL DEFAULT 'questionnaire',
  template_id     INT NULL,
  description     TEXT NULL,
  assign_mode     ENUM('by_code','individual') NOT NULL DEFAULT 'individual',
  stak_code       VARCHAR(16) NULL,          -- quando assign_mode=by_code
  planned_date    DATE NULL,
  due_date        DATE NULL,
  status          ENUM('draft','scheduled','sent','in_progress','completed','cancelled') NOT NULL DEFAULT 'draft',
  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_stka_org (organization_id),
  KEY idx_stka_tpl (template_id),
  CONSTRAINT fk_stka_org  FOREIGN KEY (organization_id) REFERENCES organizations (id) ON DELETE CASCADE,
  CONSTRAINT fk_stka_tpl  FOREIGN KEY (template_id) REFERENCES stk_questionnaire_templates (id) ON DELETE SET NULL,
  CONSTRAINT fk_stka_user FOREIGN KEY (created_by) REFERENCES users (id) ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- 6) Destinatari dell'attività (target) — un record per stakeholder coinvolto
CREATE TABLE IF NOT EXISTS stk_activity_targets (
  id               INT NOT NULL AUTO_INCREMENT,
  activity_id      INT NOT NULL,
  stakeholder_id   INT NOT NULL,
  access_token_hash CHAR(64) NULL,           -- SHA-256 del magic-link (portale esterno C5.2b)
  state            ENUM('pending','sent','responded','acknowledged','expired') NOT NULL DEFAULT 'pending',
  sent_at          DATETIME NULL,
  responded_at     DATETIME NULL,
  created_at       DATETIME DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  UNIQUE KEY uq_stkat (activity_id, stakeholder_id),
  KEY idx_stkat_stk (stakeholder_id),
  KEY idx_stkat_token (access_token_hash),
  CONSTRAINT fk_stkat_act FOREIGN KEY (activity_id) REFERENCES stk_activities (id) ON DELETE CASCADE,
  CONSTRAINT fk_stkat_stk FOREIGN KEY (stakeholder_id) REFERENCES stakeholders (id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- 7) m2m attività -> procedure (policies) — collegamento all'elenco procedure (§4.1)
CREATE TABLE IF NOT EXISTS stk_activity_procedures (
  activity_id INT NOT NULL,
  policy_id   INT NOT NULL,
  PRIMARY KEY (activity_id, policy_id),
  KEY idx_stkap_policy (policy_id),
  CONSTRAINT fk_stkap_act    FOREIGN KEY (activity_id) REFERENCES stk_activities (id) ON DELETE CASCADE,
  CONSTRAINT fk_stkap_policy FOREIGN KEY (policy_id) REFERENCES policies (id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- 8) Calendario NIS2: estende l'ENUM di review_schedule (mig.044).
--    ALTER MODIFY e' idempotente in effetto (re-eseguibile senza errore).
ALTER TABLE review_schedule
  MODIFY COLUMN entity_type ENUM('role','skill','inventory','procedure','risk','supplier','measure','custom','stakeholder_activity') NOT NULL;

-- ROLLBACK (manuale):
-- DROP TABLE IF EXISTS stk_activity_procedures
-- DROP TABLE IF EXISTS stk_activity_targets
-- DROP TABLE IF EXISTS stk_activities
-- DROP TABLE IF EXISTS stk_template_requisiti
-- DROP TABLE IF EXISTS stk_template_misure
-- DROP TABLE IF EXISTS stk_template_procedures
-- DROP TABLE IF EXISTS stk_questionnaire_templates
-- (review_schedule: rimettere l'ENUM senza 'stakeholder_activity' dopo aver eliminato le righe relative)