# IFNEX Logistics — Architecture Decisions

## ADR-001 — Shipment Review Workflow

### Context

The current order workflow uses `Shipment.status` for operational, approval, and payment-related states simultaneously.

Current flow:

`pending_approval → approved → payment → processed → ...`

There is currently no independent representation for:

* review decision
* requested customer changes
* review history
* customer resubmission

### Decision

Introduce an independent Review State and Review History domain without immediately removing or redesigning the existing `ShipmentStatus` enum.

### Transitional model

`Shipment.status` remains backward-compatible:

* `pending_approval`
* `approved`
* `cancelled`
* operational statuses
* legacy `pending_payment`

A new `Shipment.review_state` represents:

* `pending`
* `changes_requested`
* `approved`
* `rejected`

### Target workflow

```text
Create Order
    ↓
review_state = pending
status = pending_approval
    ↓
Staff Review
    ├── Request Changes
    │      ↓
    │   review_state = changes_requested
    │      ↓
    │   Customer Edit
    │      ↓
    │   Resubmit
    │      ↓
    │   review_state = pending
    │
    ├── Approve
    │      ↓
    │   review_state = approved
    │   status = approved
    │
    └── Reject
           ↓
        review_state = rejected
        status = cancelled
```

### Consequences

This allows the current client workflow to work without immediately breaking existing code that depends on `ShipmentStatus`.

Long term, approval/review state can be fully separated from operational Shipment status.

---

## ADR-002 — Shipment Review History

### Decision

Create a dedicated `shipment_reviews` domain instead of storing review reasons and decisions directly on `shipments` or using `ShipmentStatusHistory` as a substitute.

A review record should contain at minimum:

```text
id
shipment_id
revision_no
decision
reason
notes
reviewed_by
reviewed_at
created_at
updated_at
```

The review record represents one submission/review cycle.

### Rationale

`ShipmentStatusHistory` records operational status transitions. Review decisions are a different domain concern and require reviewer identity, reason, notes, and revision context.

---

## ADR-003 — Customer Revision / Resubmission

### Decision

Customer correction must not be implemented as a blind PATCH against the Shipment.

A resubmission updates the current shipment aggregate transactionally while creating a new review revision.

The aggregate includes:

```text
Shipment
ShipmentPackage[]
ShipmentItem[]
```

### Required behavior

Resubmission must:

1. validate the complete order payload;
2. recalculate volumetric and chargeable weight server-side;
3. recalculate pricing server-side;
4. update Shipment fields;
5. synchronize Packages;
6. synchronize Items;
7. create a new review revision;
8. return the shipment in `pending` review state.

AWB remains unchanged because the customer is revising the same order.

---

## ADR-004 — Request Changes vs Reject

### Decision

These are distinct actions.

### Request Changes

* order remains active;
* customer may edit;
* customer may resubmit;
* reason is mandatory;
* shipment remains operationally pre-approval.

### Reject

* order is terminated;
* shipment becomes cancelled;
* customer cannot continue the same review cycle.

API concepts:

```text
POST /staff/orders/{shipment}/request-changes
POST /staff/orders/{shipment}/approve
POST /staff/orders/{shipment}/reject
POST /customer/orders/{shipment}/resubmit
```

---

## ADR-005 — Payment State

### Decision

Do not derive payment state from `Shipment.status`.

The current implementation remains temporarily compatible with:

```text
Approved → payment available
```

but the target architecture is:

```text
Shipment Operational Status
Review State
Payment State
```

as separate domains.

`ShipmentStatus::isPaid()` must eventually be removed or deprecated because states such as `cancelled`, `failed`, and `returned` cannot safely imply payment completion.

---

## ADR-006 — Order Detail API Contract

Laravel is the canonical source of the Order Detail API contract.

Target response structure:

```text
shipment
├── status
├── review
├── sender
├── receiver
├── packages[]
├── items[]
├── financial
├── documents[]
└── tracking_events[]
```

WordPress must consume the canonical Laravel structure rather than relying on legacy flattened fields.

Known current contract mismatches:

* Laravel returns `sender.*`, WordPress expects `sender_name`, `sender_phone`, etc.
* Laravel returns `receiver.*`, WordPress expects flattened receiver fields.
* Laravel returns tracking event keys `date`, `description`, `location`; WordPress expects `event_date`, `event_description`, `event_time`.

These mismatches must be corrected during API/UI hardening.

---

## ADR-007 — Commitment Documents

`CommitmentForm` is the reusable template.

`ShipmentCommitmentForm` represents the requirement/instance for a particular shipment.

For the current client:

* physical delivery is the primary process;
* online upload is optional;
* signed-document upload must not block approval/payment unless explicitly required by business policy.

Required documents should eventually be instantiated/snapshotted per shipment instead of dynamically resolving the current active templates.

---

## ADR-008 — Operational Finance Boundary

IFNEX is not intended to become a full accounting system.

IFNEX should provide logistics-relevant financial information:

* wallet
* customer receivable/debt status
* order financial status
* payment transactions
* credit/settlement information
* audit trail

A deeper accounting system should be integrated externally through API rather than recreated inside IFNEX.

---

## ADR-009 — Production Hardening Findings

The following findings require later hardening:

1. `ShipmentStatus::isPaid()` is semantically unsafe.
2. `Shipment::isDelivered()` compares an Enum-cast field with a string.
3. `StaffOrderController` lacks explicit role/permission authorization.
4. Order Detail sender/receiver API contract is inconsistent with WordPress.
5. Tracking event API contract is inconsistent with WordPress.
6. PDF download uses a different user-meta token key from the standard Bridge token.
7. Commitment-form shipment requirements are not currently snapshotted.
8. Customer signed-document uploads currently use public storage semantics.
9. `ShipmentPackage` and `ShipmentItem` are not included in the current detailed customer order response.
10. Payment state is coupled to Shipment status.
11. Price calculation and discount consumption require a clear distinction between preview and committed pricing.
12. Existing status/schema migration history should be preserved; do not rewrite historical migrations.