# Anvil Product Tables Implementation

## Overview

Implemented complete database schema and repositories for Anvil-branded cloud products, including regions, instances, pricing, and transfer pricing.

## Implementation Summary

### 1. Database Migration (004_anvil_tables.sql)

Created 4 new tables with proper indexes, triggers, and foreign key constraints:

#### anvil_regions
- Maps Anvil-branded regions to source provider regions
- Contains 6 initial regions (Tokyo 1-3, Osaka 1-2, Seoul 1)
- Links to existing `regions` table via `source_region_id`

**Columns:**
- `id`, `name` (unique), `display_name`, `country_code`
- `source_provider`, `source_region_code`, `source_region_id` (FK)
- `active`, `created_at`, `updated_at`

**Initial Data:**
```
anvil-tyo1  → Linode ap-northeast (region_id: 26)
anvil-tyo2  → Linode jp-tyo-3 (region_id: 3)
anvil-tyo3  → Vultr nrt (region_id: 323)
anvil-osa1  → Linode jp-osa (region_id: 13)
anvil-osa2  → Vultr itm (region_id: 314)
anvil-sel1  → Vultr icn (region_id: 313)
```

#### anvil_instances
- Defines Anvil product specifications
- Supports categories: vm, gpu, g8, vpu
- GPU-specific fields: `gpu_model`, `gpu_vram_gb`

**Columns:**
- `id`, `name` (unique), `display_name`, `category`
- `vcpus`, `memory_gb`, `disk_gb`
- `transfer_tb`, `network_gbps`
- `gpu_model`, `gpu_vram_gb` (nullable)
- `active`, `created_at`, `updated_at`

#### anvil_pricing
- Retail pricing with cost tracking
- Auto-calculates KRW prices using exchange rates
- Links to both Anvil instances/regions and source instances

**Columns:**
- `id`, `anvil_instance_id` (FK), `anvil_region_id` (FK)
- `hourly_price`, `monthly_price` (retail USD)
- `hourly_price_krw`, `monthly_price_krw` (retail KRW)
- `cost_hourly`, `cost_monthly` (wholesale USD)
- `source_instance_id` (optional FK to source tables)
- `active`, `created_at`, `updated_at`
- UNIQUE constraint on (anvil_instance_id, anvil_region_id)

#### anvil_transfer_pricing
- Data transfer pricing per region
- KRW conversion support

**Columns:**
- `id`, `anvil_region_id` (FK)
- `price_per_gb` (USD), `price_per_gb_krw` (KRW)
- `included_tb` (reference only)
- `active`, `created_at`, `updated_at`
- UNIQUE constraint on anvil_region_id

### 2. TypeScript Types (src/types.ts)

Added 8 new type definitions:

```typescript
AnvilRegion
AnvilInstance
AnvilPricing
AnvilTransferPricing
AnvilRegionInput
AnvilInstanceInput
AnvilPricingInput
AnvilTransferPricingInput
```

All Input types auto-derive from their base types, excluding `id`, `created_at`, and `updated_at`.

### 3. Repositories

Created 4 repository classes following existing BaseRepository pattern:

#### AnvilRegionsRepository
- `findByName(name: string)` - Find by Anvil region name
- `findByCountry(countryCode: string)` - Get all regions in a country
- `findBySourceRegion(sourceRegionId: number)` - Reverse lookup
- `findActive()` - Get all active regions
- `updateActive(id: number, active: boolean)` - Toggle active status
- `upsertMany(regions: AnvilRegionInput[])` - Bulk insert/update

#### AnvilInstancesRepository
- `findByName(name: string)` - Find by instance name
- `findByCategory(category)` - Filter by vm/gpu/g8/vpu
- `findActive(category?)` - Get active instances with optional category filter
- `searchByResources(minVcpus?, minMemoryGb?, minDiskGb?, category?)` - Resource-based search
- `updateActive(id: number, active: boolean)` - Toggle active status
- `upsertMany(instances: AnvilInstanceInput[])` - Bulk insert/update

#### AnvilPricingRepository
- `findByInstance(anvilInstanceId: number)` - All pricing for an instance
- `findByRegion(anvilRegionId: number)` - All pricing in a region
- `findByInstanceAndRegion(instanceId, regionId)` - Specific pricing record
- `findActive(instanceId?, regionId?)` - Active pricing with optional filters
- `searchByPriceRange(minHourly?, maxHourly?, minMonthly?, maxMonthly?)` - Price range search
- `updateActive(id: number, active: boolean)` - Toggle active status
- `upsertMany(pricing: AnvilPricingInput[])` - Bulk insert/update with auto KRW calculation

#### AnvilTransferPricingRepository
- `findByRegion(anvilRegionId: number)` - Get transfer pricing for a region
- `findActive()` - Get all active transfer pricing
- `updateActive(id: number, active: boolean)` - Toggle active status
- `upsertMany(pricing: AnvilTransferPricingInput[])` - Bulk insert/update with KRW conversion

### 4. Repository Factory Updates

Updated `RepositoryFactory` class to include:
- `anvilRegions: AnvilRegionsRepository`
- `anvilInstances: AnvilInstancesRepository`
- `anvilPricing: AnvilPricingRepository`
- `anvilTransferPricing: AnvilTransferPricingRepository`

All repositories use lazy singleton pattern for efficient caching.

### 5. KRW Pricing Support

Pricing repositories automatically calculate KRW prices using environment variables:
- `KRW_EXCHANGE_RATE` - Base USD to KRW conversion rate (default: 1450)
- `KRW_VAT_RATE` - VAT multiplier (default: 1.1 for 10% VAT)
- `KRW_MARKUP_RATE` - Markup multiplier (default: 1.1 for 10% markup)

KRW prices are auto-calculated during `upsertMany()` operations.

## Database Schema

```
anvil_regions (1) ──< anvil_pricing (M)
anvil_instances (1) ──< anvil_pricing (M)
anvil_regions (1) ──< anvil_transfer_pricing (1)
regions (1) ──< anvil_regions (M) [source mapping]
```

## Deployment Status

✅ Migration 004 applied to remote database (2026-01-25)
✅ 17 queries executed successfully
✅ 6 initial regions inserted
✅ All 4 tables created with indexes and triggers
✅ TypeScript compilation successful
✅ Deployed to production (Version: 5905e5df-7265-4872-b05e-e3fe4b7d0619)

## Usage Examples

### Query Anvil Regions
```typescript
const repos = new RepositoryFactory(env.DB, env);

// Get all Japan regions
const jpRegions = await repos.anvilRegions.findByCountry('JP');
// Returns: anvil-tyo1, anvil-tyo2, anvil-tyo3, anvil-osa1, anvil-osa2

// Find specific region
const tyo1 = await repos.anvilRegions.findByName('anvil-tyo1');
```

### Create Anvil Instance
```typescript
await repos.anvilInstances.create({
  name: 'anvil-1g-1c',
  display_name: 'Basic 1GB',
  category: 'vm',
  vcpus: 1,
  memory_gb: 1,
  disk_gb: 25,
  transfer_tb: 1,
  network_gbps: 1,
  gpu_model: null,
  gpu_vram_gb: null,
  active: 1,
});
```

### Set Pricing (Auto KRW Calculation)
```typescript
await repos.anvilPricing.upsertMany([
  {
    anvil_instance_id: 1,
    anvil_region_id: 1,
    hourly_price: 0.015,
    monthly_price: 10,
    cost_hourly: 0.012,
    cost_monthly: 8,
    source_instance_id: 123,
    active: 1,
  }
]);
// KRW prices auto-calculated:
// hourly_price_krw = 0.015 × 1450 × 1.1 × 1.1 ≈ 26.37
// monthly_price_krw = 10 × 1450 × 1.1 × 1.1 ≈ 17,545
```

### Search by Resources
```typescript
// Find instances with at least 2 vCPUs and 4GB RAM
const instances = await repos.anvilInstances.searchByResources(
  2,    // minVcpus
  4,    // minMemoryGb
  null, // minDiskGb
  'vm'  // category
);
```

## Files Changed

### Created
- `/migrations/004_anvil_tables.sql` - Database schema
- `/src/repositories/anvil-regions.ts` - Regions repository
- `/src/repositories/anvil-instances.ts` - Instances repository
- `/src/repositories/anvil-pricing.ts` - Pricing repository
- `/src/repositories/anvil-transfer-pricing.ts` - Transfer pricing repository
- `/src/repositories/anvil-regions.test.ts` - Unit tests

### Modified
- `/src/types.ts` - Added 8 new types
- `/src/repositories/index.ts` - Added 4 new repository exports and factory getters

## Next Steps

To complete the Anvil product implementation:

1. **Populate Instance Data**: Create Anvil instance definitions (VM, GPU, G8, VPU tiers)
2. **Set Pricing**: Map Anvil instances to source providers and set retail pricing
3. **API Endpoints**: Create endpoints for querying Anvil products
4. **Sync Service**: Implement sync logic to update costs from source providers
5. **Documentation**: Add API documentation for Anvil endpoints

## Testing

Basic repository tests created in `anvil-regions.test.ts`. Additional test coverage recommended for:
- Instance search and filtering
- Pricing calculations and KRW conversion
- Transfer pricing queries
- Edge cases and error handling