-- NIS2 Agile — Migration 040: Demo Avatar (product-demo-protocol v1.0.1)
-- Tabelle additive per la modalità demo guidata dall'avatar di prodotto.
-- Range org demo riservato: 996000-996999 (org demo isolata = 996001).
-- Idempotente: CREATE TABLE IF NOT EXISTS.

CREATE TABLE IF NOT EXISTS demo_sessions (
    session_id        VARCHAR(64)  NOT NULL PRIMARY KEY,        -- 'demo-<uuid>'
    organization_id   INT          NOT NULL,                    -- org demo (996000-996999)
    hmac_key_seed     VARCHAR(64)  NOT NULL,                    -- base64 standard 44 char
    language          VARCHAR(5)   NOT NULL DEFAULT 'it',
    tour_variant      VARCHAR(16)  NOT NULL DEFAULT 'full',
    presentation_mode VARCHAR(16)  NOT NULL DEFAULT 'realtime',
    referrer_url      VARCHAR(512) NULL,
    user_agent        VARCHAR(512) NULL,
    ip_hash           VARCHAR(64)  NULL,                        -- sha256(ip+DAILY_SALT), server-side
    expires_at        DATETIME     NOT NULL,
    created_at        DATETIME     NOT NULL DEFAULT CURRENT_TIMESTAMP,
    INDEX idx_demo_sessions_expires (expires_at)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS demo_events (
    id                   INT          NOT NULL AUTO_INCREMENT PRIMARY KEY,
    session_id           VARCHAR(64)  NOT NULL,
    event_type           VARCHAR(40)  NOT NULL,                 -- step_completed | step_skipped | ...
    step_id              INT          NULL,
    metadata             JSON         NULL,
    client_timestamp_iso VARCHAR(40)  NULL,
    created_at           DATETIME     NOT NULL DEFAULT CURRENT_TIMESTAMP,
    UNIQUE KEY uk_demo_event_idem (session_id, event_type, step_id, client_timestamp_iso),
    INDEX idx_demo_events_session (session_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;