-- cloud/schema.sql
-- MySQL 8.0+ DDL for the P1-B cloud ingest + dashboard subset
-- (backing store for App\Repository\Pdo\* -- see cloud/src/Repository/Pdo/).
--
-- Scope: this is the P1-B subset of the full design-spec schema (design doc §7.4).
-- Tables/columns that belong to later phases are intentionally OMITTED here (YAGNI):
--   sites, escalations, oncall, compliance, retention_policy, audit hash-chaining
--   (prev_hash/hash on audit_log), and events.disposition/is_test/legal_hold/lifecycle_state.
-- See docs/superpowers/specs/2026-07-11-workplace-safety-ai-cctv-design.md §7.4 and the
-- Task 16 brief self-review for the P1-B / P2 / P3 split.
--
-- sqlite compatibility notes (cloud/tests/PdoIntegrationTest.php uses its own minimal
-- sqlite-flavored DDL for the tables it round-trips -- this file targets MySQL only,
-- these notes exist to explain the mechanical translation if that ever needs to grow):
--   * `INT ... AUTO_INCREMENT`  -> sqlite: `INTEGER PRIMARY KEY AUTOINCREMENT` (must be the
--                                  table's sole INTEGER PRIMARY KEY column)
--   * `ENGINE=InnoDB`           -> sqlite: omit (no storage engines)
--   * `DEFAULT CHARSET=...`     -> sqlite: omit
--   * `JSON` column type        -> sqlite: `TEXT` (no native JSON type; app always
--                                  reads/writes JSON-encoded strings either way)
--   * `DEFAULT (UNIX_TIMESTAMP())` -> sqlite: `DEFAULT (strftime('%s','now'))`
--   * `INSERT ... ON DUPLICATE KEY UPDATE` (rate_limits upsert) -> sqlite:
--                                  `INSERT ... ON CONFLICT(rate_key, window_start)
--                                   DO UPDATE SET count = count + 1`
--   * `CHECK (...)` on enum-like columns -> sqlite supports CHECK natively, no change
--   * `TINYINT(1)`               -> sqlite: `INTEGER` (0/1)
--   * `BIGINT UNSIGNED`          -> sqlite: `INTEGER` (sqlite ints are always 64-bit signed)
--
-- All app-level SQL against this schema uses prepared statements with `?` placeholders --
-- no string interpolation of values anywhere in App\Repository\Pdo\*.

SET NAMES utf8mb4;

-- ---------------------------------------------------------------------------
-- users: dashboard accounts (auth + RBAC + brute-force lockout).
-- No PdoUserRepository::create() exists in P1-B -- the first admin account is
-- provisioned out-of-band via the CLI snippet in cloud/docs/cloud-deploy.md.
-- ---------------------------------------------------------------------------
CREATE TABLE move_users (
    id              INT UNSIGNED    NOT NULL AUTO_INCREMENT,
    username        VARCHAR(190)    NOT NULL,
    password_hash   VARCHAR(255)    NOT NULL,            -- Argon2id, see App\Security\Password::hash()
    role            VARCHAR(32)     NOT NULL,             -- app-whitelisted: admin|operator|viewer (App\Auth\Rbac)
    site_scope      VARCHAR(190)    NULL,
    failed_attempts INT UNSIGNED    NOT NULL DEFAULT 0,
    locked_until    BIGINT UNSIGNED NOT NULL DEFAULT 0,   -- unix timestamp; 0 = not locked
    created_at      BIGINT UNSIGNED NOT NULL DEFAULT (UNIX_TIMESTAMP()),
    PRIMARY KEY (id),
    UNIQUE KEY uq_users_username (username),
    CONSTRAINT chk_users_role CHECK (role IN ('admin','operator','viewer'))
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- ---------------------------------------------------------------------------
-- devices: one row per Pi/edge device; holds the per-device HMAC ingest secret.
-- No PdoDeviceRepository::create() exists -- rows are provisioned by an admin
-- (per-device secret issuance) before the device is allowed to sync/ingest.
-- ---------------------------------------------------------------------------
CREATE TABLE move_devices (
    device_id                VARCHAR(64)     NOT NULL,
    name                     VARCHAR(190)    NULL,
    site                     VARCHAR(64)     NULL,        -- access-control scope; matches users.site_scope (NULL = unassigned)
    secret                   VARCHAR(255)    NOT NULL,    -- per-device HMAC key; rotate via admin CLI, never log
    config_version           INT UNSIGNED    NOT NULL DEFAULT 1,  -- authoritative version served by GET /api/config
    last_fps                 DOUBLE          NULL,
    last_temp                DOUBLE          NULL,
    last_throttle            TINYINT(1)      NULL,
    reported_config_version  INT UNSIGNED    NULL,        -- version the device last claimed via heartbeat
    last_heartbeat_at        BIGINT UNSIGNED NULL,
    created_at                BIGINT UNSIGNED NOT NULL DEFAULT (UNIX_TIMESTAMP()),
    PRIMARY KEY (device_id),
    KEY ix_devices_site (site)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- ---------------------------------------------------------------------------
-- cameras: per-device camera inventory (design doc §7.4). No dedicated
-- PdoCameraRepository exists in P1-B -- zones/events reference camera_id
-- directly as a free-form string. Kept for documentation/future per-camera
-- config and to avoid a breaking migration when that repository is added.
-- ---------------------------------------------------------------------------
CREATE TABLE move_cameras (
    camera_id   VARCHAR(64)     NOT NULL,
    device_id   VARCHAR(64)     NOT NULL,
    name        VARCHAR(190)    NULL,
    role        VARCHAR(32)     NULL,        -- app-whitelisted: fall_critical|zone|low
    created_at  BIGINT UNSIGNED NOT NULL DEFAULT (UNIX_TIMESTAMP()),
    PRIMARY KEY (camera_id),
    KEY ix_cameras_device (device_id),
    CONSTRAINT chk_cameras_role CHECK (role IS NULL OR role IN ('fall_critical','zone','low'))
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- ---------------------------------------------------------------------------
-- zones: polygon regions per camera, edited via the zone-config dashboard.
-- No FK to cameras/devices: zones may legitimately be created before a
-- `cameras` row exists for a given camera_id (no camera-registration flow in
-- P1-B), so a FK here would spuriously reject valid app writes.
-- ---------------------------------------------------------------------------
CREATE TABLE move_zones (
    zone_id       CHAR(32)        NOT NULL,   -- bin2hex(random_bytes(16)), same convention as snapshot uuids
    device_id     VARCHAR(64)     NOT NULL,
    camera_id     VARCHAR(64)     NOT NULL,
    level         VARCHAR(16)     NOT NULL,   -- app-whitelisted: warning|restricted|pinch (ZoneConfigController::LEVELS)
    polygon_json  JSON            NOT NULL,
    rules_json    JSON            NULL,       -- optional occupancy rules: {"min_workers","max_workers","max_dwell_s"} (ZoneConfigController validates)
    updated_at    BIGINT UNSIGNED NOT NULL,
    PRIMARY KEY (zone_id),
    KEY ix_zones_camera (camera_id),
    KEY ix_zones_device (device_id),
    CONSTRAINT chk_zones_level CHECK (level IN ('warning','restricted','pinch'))
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- ---------------------------------------------------------------------------
-- events: ingested detections. event_type/severity are already validated in
-- App\Ingest\EventValidator before insert(); the CHECK constraints below are
-- defense-in-depth only, not the primary validation layer.
-- ---------------------------------------------------------------------------
CREATE TABLE move_events (
    event_id          INT UNSIGNED    NOT NULL AUTO_INCREMENT,
    event_uuid        CHAR(32)        NULL,       -- edge-generated idempotency key (dedup a re-sent event); NULL for legacy rows
    device_id         VARCHAR(64)     NOT NULL,
    site              VARCHAR(64)     NULL,       -- denormalized from move_devices.site at ingest; access-control scope
    camera_id         VARCHAR(64)     NOT NULL,
    event_type        VARCHAR(32)     NOT NULL,
    severity          VARCHAR(16)     NOT NULL,
    track_id          INT             NULL,
    zone_id           CHAR(32)        NULL,
    occurred_at       DOUBLE          NOT NULL,   -- device-reported epoch seconds (float)
    duration_s        DOUBLE          NOT NULL DEFAULT 0,
    metrics_json      JSON            NULL,
    spatial_x         DOUBLE          NULL,       -- normalized foot/reference point (0..1 of the frame),
    spatial_y         DOUBLE          NULL,       --   heatmap raw material; NULL for legacy/deviceless events
    acknowledged_by   VARCHAR(190)    NULL,
    acknowledged_at   BIGINT UNSIGNED NULL,
    false_positive_by VARCHAR(190)    NULL,       -- operator's 오탐 tag (per-camera FP-rate stats; no auto-tuning)
    false_positive_at BIGINT UNSIGNED NULL,
    received_at       BIGINT UNSIGNED NOT NULL,   -- server receipt time (PHP time()), for clock-skew flagging (design doc §8)
    PRIMARY KEY (event_id),
    -- Idempotency: a UNIQUE key on event_uuid makes a re-sent event (POST succeeded server-side
    -- but the ACK timed out client-side) collide instead of duplicating. MySQL allows multiple
    -- NULLs in a UNIQUE index, so legacy rows without a uuid do not conflict.
    UNIQUE KEY uq_events_uuid (event_uuid),
    KEY ix_events_occurred_at (occurred_at),
    KEY ix_events_severity_occurred_at (severity, occurred_at),
    KEY ix_events_site_occurred_at (site, occurred_at),  -- site-scoped dashboard list (P3-2b)
    KEY ix_events_device (device_id),
    KEY ix_events_camera (camera_id, event_id),  -- zone editor: newest snapshot per camera
    CONSTRAINT chk_events_type CHECK (event_type IN (
        'fall','no_motion','immobility','ghost','zone_warning',
        'zone_restricted','pinch','monitoring_degraded','device_fault',
        'lone_worker','overcapacity','overstay','near_fall','ergo_report'
    )),
    CONSTRAINT chk_events_severity CHECK (severity IN ('critical','high','warning','info'))
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- ---------------------------------------------------------------------------
-- event_snapshots: re-encoded JPEG references. Files live under storage/
-- (webroot-adjacent, served only via the authenticated SnapshotProxy). FK to
-- events is safe because IngestController always inserts the parent event row
-- before calling SnapshotRepository::add() for its snapshots.
-- ---------------------------------------------------------------------------
CREATE TABLE move_event_snapshots (
    snapshot_id   INT UNSIGNED    NOT NULL AUTO_INCREMENT,
    event_id      INT UNSIGNED    NOT NULL,
    file_uuid     CHAR(32)        NOT NULL,   -- bin2hex(random_bytes(16)); on-disk filename = <uuid>.jpg
    content_hash  CHAR(64)        NOT NULL,   -- sha256 of the re-encoded bytes
    created_at    BIGINT UNSIGNED NOT NULL,
    PRIMARY KEY (snapshot_id),
    UNIQUE KEY uq_event_snapshots_uuid (file_uuid),
    -- Idempotent snapshot recovery: a re-sent event carries the SAME re-encoded bytes (same
    -- content_hash), so this makes a duplicate/racing store collide instead of writing a second
    -- copy. Lets the dedup path safely re-store missing evidence without duplication.
    UNIQUE KEY uq_event_snapshots_event_hash (event_id, content_hash),
    KEY ix_event_snapshots_event (event_id),
    KEY ix_event_snapshots_created (created_at),  -- retention purge scans WHERE created_at < ?
    CONSTRAINT fk_event_snapshots_event FOREIGN KEY (event_id) REFERENCES move_events (event_id)
        ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- ---------------------------------------------------------------------------
-- thresholds: per-device (optionally per-camera/zone) tunables synced via
-- GET /api/config. No PdoThresholdRepository write method exists in P1-B --
-- rows are seeded/edited directly (phpMyAdmin) until a management UI lands.
-- ---------------------------------------------------------------------------
CREATE TABLE move_thresholds (
    id          INT UNSIGNED  NOT NULL AUTO_INCREMENT,
    device_id   VARCHAR(64)   NOT NULL,
    camera_id   VARCHAR(64)   NULL,
    zone_id     CHAR(32)      NULL,
    `key`       VARCHAR(64)   NOT NULL,
    `value`     VARCHAR(255)  NOT NULL,
    PRIMARY KEY (id),
    KEY ix_thresholds_device (device_id),
    UNIQUE KEY uq_thresholds_scope_key (device_id, camera_id, zone_id, `key`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- ---------------------------------------------------------------------------
-- nonces: replay-protection store for ingest/config/heartbeat HMAC requests.
-- `nonce` is the PRIMARY KEY (unique) so PdoNonceRepository::remember() is
-- safe against a duplicate-insert race: IngestController already calls
-- seen() before remember(), and a thrown duplicate-key error on a racing
-- remember() is an acceptable, expected outcome (closes the seen()/remember()
-- TOCTOU flagged in the Task 7 review -- the PK uniqueness is the real guard,
-- not the earlier seen() check).
-- ---------------------------------------------------------------------------
CREATE TABLE move_nonces (
    nonce       VARCHAR(190)    NOT NULL,
    expires_at  BIGINT UNSIGNED NOT NULL,
    PRIMARY KEY (nonce),
    KEY ix_nonces_expires_at (expires_at)  -- for a periodic `DELETE FROM move_nonces WHERE expires_at < ?` cleanup job
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- ---------------------------------------------------------------------------
-- rate_limits: per-key sliding-window counters for ingest rate limiting. The
-- (rate_key, window_start) primary key backs an atomic
-- `INSERT ... ON DUPLICATE KEY UPDATE count = count + 1` upsert in
-- PdoRateLimiterRepository::hit() -- no read-modify-write race window.
-- ---------------------------------------------------------------------------
CREATE TABLE move_rate_limits (
    rate_key      VARCHAR(190)    NOT NULL,
    window_start  BIGINT UNSIGNED NOT NULL,  -- floor(now / 60): the minute bucket
    count         INT UNSIGNED    NOT NULL DEFAULT 0,
    PRIMARY KEY (rate_key, window_start),
    -- The reap `DELETE ... WHERE window_start < ?` cannot use the PK (window_start is its trailing
    -- column), so give it its own index to avoid a locking full-scan on the pre-auth hot path.
    KEY ix_rate_limits_window (window_start)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- ---------------------------------------------------------------------------
-- audit_log: append-only action log (acknowledge / zone save+delete / login).
-- Tamper-evident hash-chaining (design doc §9.2) is deferred to P3 per the
-- Task 16 brief self-review -- this table is the plain append-only record only.
-- ---------------------------------------------------------------------------
CREATE TABLE move_audit_log (
    id           INT UNSIGNED    NOT NULL AUTO_INCREMENT,
    actor        VARCHAR(190)    NOT NULL,
    action       VARCHAR(64)     NOT NULL,
    target       VARCHAR(190)    NOT NULL,
    before_json  JSON            NOT NULL,
    after_json   JSON            NOT NULL,
    ts           BIGINT UNSIGNED NOT NULL,
    PRIMARY KEY (id),
    KEY ix_audit_log_ts (ts),
    KEY ix_audit_log_actor (actor)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- ===========================================================================
-- UPGRADING AN EXISTING DATABASE (fresh installs already have everything above):
-- do NOT copy the statements below by hand — they are SQL comments and will not
-- run. Apply the RUNNABLE migration instead:
--
--   cloud/migrations/2026-07-17-p1-9-p3-2b.sql
--   cloud/migrations/2026-07-20-move-table-prefix.sql   (run this one LAST)
--
-- The second migration renames every table to the `move_` prefix used above and
-- by App\Repository\Pdo\* -- an existing DB must be renamed before deploy or all
-- queries fail with "table doesn't exist".
--
-- It adds devices.site / events.site / events.event_uuid, the retention and
-- rate-limit reap indexes, AND backfills events.site from move_devices.site (without
-- that backfill, historical events vanish for a scoped operator). Run it once in
-- phpMyAdmin BEFORE deploying code that reads these columns, then provision:
--   UPDATE move_devices SET site = 'factory-a' WHERE device_id = 'pi-1';
--   UPDATE move_users   SET site_scope = 'factory-a' WHERE username = 'operator-a';
-- A user with site_scope = NULL is a global operator; '' is NOT global (matches
-- nothing — a blank scope fails closed).
-- ===========================================================================