feat(payments): expose primary transfer candidate

app/Domains/Purchase/Resources/PurchaseResource.php

@@ -4,6 +4,7 @@ namespace App\Domains\Purchase\Resources;
 
 use App\Domains\Purchase\Models\Purchase;
 use App\Domains\Purchase\Models\PurchaseItem;
+use App\Domains\Purchase\Models\TelepagosPaymentCandidate;
 use Illuminate\Http\Request;
 use Illuminate\Http\Resources\Json\JsonResource;
 
@@ -23,6 +24,7 @@ class PurchaseResource extends JsonResource
         $ticketsCount = array_key_exists('tickets_count', $this->resource->getAttributes())
             ? (int) $this->resource->getAttribute('tickets_count')
             : null;
+        $paymentVerification = $this->resolvePaymentVerification();
 
         $subtotal = $items->isNotEmpty()
             ? $items->reduce(
@@ -58,6 +60,7 @@ class PurchaseResource extends JsonResource
             'items' => PurchaseItemResource::collection($items),
             'tickets_count' => $this->when($ticketsCount !== null, $ticketsCount),
             'has_generated_tickets' => $this->when($ticketsCount !== null, $ticketsCount > 0),
+            'payment_verification' => $this->when($paymentVerification !== null, $paymentVerification),
             'subtotal' => $this->formatMoney($subtotal),
             'total' => $this->formatMoney($total),
         ];
@@ -77,4 +80,74 @@ class PurchaseResource extends JsonResource
     {
         return number_format((float) ($amount ?? 0), 2, '.', '');
     }
+
+    /** @return array<string, mixed>|null */
+    private function resolvePaymentVerification(): ?array
+    {
+        if (
+            $this->status !== Purchase::STATUS_IN_REVIEW
+            || $this->payment_method !== 'transfer'
+            || ! $this->resource->relationLoaded('telepagosPaymentCandidates')
+        ) {
+            return null;
+        }
+
+        $candidates = $this->resource
+            ->getRelation('telepagosPaymentCandidates')
+            ->sort(fn (TelepagosPaymentCandidate $left, TelepagosPaymentCandidate $right): int => $this->comparePaymentCandidates($left, $right))
+            ->values();
+        /** @var TelepagosPaymentCandidate|null $primary */
+        $primary = $candidates->first();
+
+        return [
+            'status' => $primary === null ? 'pending' : 'candidate',
+            'candidate_count' => $candidates->count(),
+            'primary' => $primary === null ? null : [
+                'reason' => $primary->match_reason,
+                'payment_amount' => $this->formatMoney($primary->payment_amount),
+                'purchase_amount' => $this->formatMoney($primary->purchase_amount),
+                'amount_difference' => $this->formatMoney($primary->amount_difference),
+                'confidence' => $primary->confidence,
+                'detected_at' => $primary->payment?->created_at?->toIso8601String(),
+            ],
+            'reasons' => $candidates
+                ->pluck('match_reason')
+                ->unique()
+                ->values()
+                ->all(),
+        ];
+    }
+
+    private function comparePaymentCandidates(
+        TelepagosPaymentCandidate $left,
+        TelepagosPaymentCandidate $right,
+    ): int {
+        $reasonComparison = $this->paymentCandidateRank($left->match_reason)
+            <=> $this->paymentCandidateRank($right->match_reason);
+
+        if ($reasonComparison !== 0) {
+            return $reasonComparison;
+        }
+
+        $differenceComparison = (float) $left->amount_difference <=> (float) $right->amount_difference;
+
+        if ($differenceComparison !== 0) {
+            return $differenceComparison;
+        }
+
+        $leftTimestamp = $left->payment?->created_at?->getTimestamp() ?? 0;
+        $rightTimestamp = $right->payment?->created_at?->getTimestamp() ?? 0;
+
+        return ($rightTimestamp <=> $leftTimestamp) ?: ($right->id <=> $left->id);
+    }
+
+    private function paymentCandidateRank(string $reason): int
+    {
+        return match ($reason) {
+            'ambiguous_exact_match' => 0,
+            'exact_dni_near_amount' => 1,
+            'exact_amount_different_dni' => 2,
+            default => 3,
+        };
+    }
 }