# PhoenixKitCatalogue

Catalogue module for [PhoenixKit](https://github.com/BeamLabEU/phoenix_kit) — product catalogue management with manufacturers, suppliers, categories, and items.

Designed for manufacturing companies (e.g. kitchen/furniture producers) that need to organize materials and components from multiple manufacturers and suppliers.

## Features

- **Catalogues** — top-level groupings (e.g. "Kitchen Furniture", "Plumbing")
- **Categories** — subdivisions within a catalogue with manual position ordering
- **Items** — individual products with SKU, pricing, unit of measure, and manufacturer
- **Manufacturers** — company directory with many-to-many supplier linking
- **Suppliers** — delivery companies linked to manufacturers
- **Soft-delete** — catalogues, categories, and items support trash/restore with cascading
- **Multilingual** — all translatable fields use PhoenixKit's multilang system
- **Move operations** — move categories between catalogues, items between categories
- **Zero-config discovery** — auto-discovered by PhoenixKit via beam scanning

## Installation

Add to your parent app's `mix.exs`:

```elixir
{:phoenix_kit_catalogue, "~> 0.1.0"}
```

Then:

```bash
mix deps.get
```

> **Development:** During local development, you can use a path dependency instead:
> `{:phoenix_kit_catalogue, path: "../phoenix_kit_catalogue"}`

The module auto-discovers via beam scanning. Enable it in **Admin > Modules**.

## Data Model

```
Manufacturer (1) ──< ManufacturerSupplier >── (1) Supplier
     │                    (many-to-many)
     │
     └──────────────────────────────┐
                                    │
Catalogue (1) ──> Category (many) ──> Item (many)
                   │                   ├── belongs_to Category (optional)
                   │                   └── belongs_to Manufacturer (optional)
                   └── position-ordered, soft-deletable
```

All tables use UUIDv7 primary keys and are prefixed with `phoenix_kit_cat_*`.

### Status Values

| Entity       | Statuses                                  |
|-------------|-------------------------------------------|
| Catalogue   | `active`, `archived`, `deleted`           |
| Category    | `active`, `deleted`                       |
| Item        | `active`, `inactive`, `discontinued`, `deleted` |
| Manufacturer| `active`, `inactive`                      |
| Supplier    | `active`, `inactive`                      |

## Soft-Delete System

First delete sets status to `"deleted"` (recoverable). Permanent delete removes from DB.

### Cascade Behaviour

**Downward on trash/permanent-delete:**
- Trash catalogue -> trashes all categories + all items
- Trash category -> trashes all items
- Permanently delete follows the same cascade

**Upward on restore:**
- Restore item -> restores its deleted parent category
- Restore category -> restores its deleted parent catalogue + all items

All cascading operations run in database transactions.

## API

The public API lives in `PhoenixKitCatalogue.Catalogue`. Every function has `@doc` documentation — use `h/1` in IEx to explore.

### Quick Reference

```elixir
alias PhoenixKitCatalogue.Catalogue

# ── Catalogues ────────────────────────────────────────
Catalogue.list_catalogues()                        # excludes deleted
Catalogue.list_catalogues(status: "deleted")       # only deleted
Catalogue.create_catalogue(%{name: "Kitchen"})
Catalogue.update_catalogue(cat, %{name: "New Name"})
Catalogue.trash_catalogue(cat)                     # soft-delete (cascades down)
Catalogue.restore_catalogue(cat)                   # restore (cascades down)
Catalogue.permanently_delete_catalogue(cat)        # hard-delete (cascades down)

# ── Categories ────────────────────────────────────────
Catalogue.list_categories_for_catalogue(cat_uuid)  # excludes deleted
Catalogue.list_all_categories()                    # "Catalogue / Category" format
Catalogue.create_category(%{name: "Frames", catalogue_uuid: cat.uuid})
Catalogue.trash_category(category)                 # cascades to items
Catalogue.restore_category(category)               # cascades up + down
Catalogue.permanently_delete_category(category)    # cascades to items
Catalogue.move_category_to_catalogue(category, target_uuid)
Catalogue.next_category_position(cat_uuid)

# ── Items ─────────────────────────────────────────────
Catalogue.list_items_for_category(cat_uuid)        # excludes deleted
Catalogue.list_items_for_catalogue(cat_uuid)       # excludes deleted
Catalogue.create_item(%{name: "Oak Panel", price: 25.50, sku: "OAK-18"})
Catalogue.trash_item(item)                         # soft-delete
Catalogue.restore_item(item)                       # cascades up to category
Catalogue.permanently_delete_item(item)            # hard-delete
Catalogue.trash_items_in_category(cat_uuid)        # bulk soft-delete
Catalogue.move_item_to_category(item, new_cat_uuid)

# ── Manufacturers ─────────────────────────────────────
Catalogue.list_manufacturers(status: "active")
Catalogue.create_manufacturer(%{name: "Blum", website: "https://blum.com"})
Catalogue.delete_manufacturer(m)                   # hard-delete

# ── Suppliers ─────────────────────────────────────────
Catalogue.list_suppliers(status: "active")
Catalogue.create_supplier(%{name: "Regional Distributors"})
Catalogue.delete_supplier(s)                       # hard-delete

# ── Manufacturer ↔ Supplier Links ─────────────────────
Catalogue.link_manufacturer_supplier(m_uuid, s_uuid)
Catalogue.unlink_manufacturer_supplier(m_uuid, s_uuid)
Catalogue.sync_manufacturer_suppliers(m_uuid, [s1_uuid, s2_uuid])
Catalogue.list_suppliers_for_manufacturer(m_uuid)
Catalogue.list_manufacturers_for_supplier(s_uuid)

# ── Counts ────────────────────────────────────────────
Catalogue.deleted_count_for_catalogue(cat_uuid)    # items + categories
Catalogue.deleted_catalogue_count()

# ── Multilang ─────────────────────────────────────────
Catalogue.get_translation(record, "ja")
Catalogue.set_translation(record, "ja", field_data, &Catalogue.update_catalogue/2)
```

## Admin UI

The module registers admin tabs via `PhoenixKit.Module`:

| Path | View |
|------|------|
| `/admin/catalogue` | Catalogue list with Active/Deleted tabs |
| `/admin/catalogue/new` | New catalogue form |
| `/admin/catalogue/:uuid` | Catalogue detail with categories, items, status tabs |
| `/admin/catalogue/:uuid/edit` | Edit catalogue + permanent delete |
| `/admin/catalogue/manufacturers` | Manufacturer list |
| `/admin/catalogue/suppliers` | Supplier list |
| `/admin/catalogue/categories/:uuid/edit` | Edit category + move + permanent delete |
| `/admin/catalogue/items/:uuid/edit` | Edit item + move |

All forms support multilingual content when the Languages module is enabled.

## Database & Migrations

This package contains **no database migrations**. All tables (`phoenix_kit_cat_*`) and migrations are managed by the parent [phoenix_kit](https://github.com/BeamLabEU/phoenix_kit) project. This module only defines Ecto schemas that map to those tables.

## Tests

```bash
mix test
```

The test database must be created and migrated by the parent `phoenix_kit` project first.

83 tests covering:
- Full CRUD for all entities
- Cascading soft-delete (downward) and restore (upward + downward)
- Permanent delete cascading
- Move operations (category between catalogues, item between categories)
- Deleted counts
- Schema validations (status, unit, price, SKU uniqueness, name length)
- Manufacturer-supplier link sync

## License

MIT