[#SIRH-36] corriger calcule rtt contrat custom (#27)

| Numéro du ticket | Titre du ticket |
|------------------|-----------------|
|                  |                 |

## Description de la PR

## Modification du .env

## Check list

- [ ] Pas de régression
- [ ] TU/TI/TF rédigée
- [ ] TU/TI/TF OK
- [ ] CHANGELOG modifié

Reviewed-on: #27
Co-authored-by: tristan <tristan@yuno.malio.fr>
Co-committed-by: tristan <tristan@yuno.malio.fr>

tests/State/EmployeeRttSummaryProviderTest.php

@@ -5,6 +5,7 @@ declare(strict_types=1);
 namespace App\Tests\State;
 
 use App\Dto\Contracts\ContractPhase;
+use App\Dto\Rtt\EmployeeRttWeekSummary;
 use App\Entity\Contract;
 use App\Entity\Employee;
 use App\Entity\EmployeeContractPeriod;
@@ -201,6 +202,45 @@ final class EmployeeRttSummaryProviderTest extends TestCase
         self::assertSame(2030, $year);
     }
 
+    public function testFlatDeficitWeekIsNotDrainedFromTiers(): void
+    {
+        $provider = $this->buildProvider([]);
+
+        // Semaine CUSTOM déficitaire (-120), aucune tranche accumulée.
+        $weeks  = [$this->weekSummary(-120, true)];
+        $result = $this->invokePrivate($provider, 'applyDeficitCascade', $weeks, 0, 0);
+
+        // Buckets restent à 0 ; le total négatif est conservé (le cumul est calculé ailleurs).
+        self::assertSame(0, $result[0]->base25Minutes);
+        self::assertSame(0, $result[0]->base50Minutes);
+        self::assertSame(-120, $result[0]->totalMinutes);
+        self::assertTrue($result[0]->isFlatRecovery);
+    }
+
+    public function testStandardDeficitWeekDrainsFiftyThenTwentyFive(): void
+    {
+        $provider = $this->buildProvider([]);
+
+        // Semaine 35h/39h déficitaire (-100), avec 60 en 50% et 120 en 25% accumulés.
+        $weeks  = [$this->weekSummary(-100, false)];
+        $result = $this->invokePrivate($provider, 'applyDeficitCascade', $weeks, 120, 60);
+
+        self::assertSame(-60, $result[0]->base50Minutes); // 60 drainés du 50%
+        self::assertSame(-40, $result[0]->base25Minutes); // 40 restants drainés du 25%
+        self::assertSame(-100, $result[0]->totalMinutes);
+    }
+
+    public function testFlatPositiveWeekIsUntouched(): void
+    {
+        $provider = $this->buildProvider([]);
+
+        $weeks  = [$this->weekSummary(180, true)];
+        $result = $this->invokePrivate($provider, 'applyDeficitCascade', $weeks, 0, 0);
+
+        self::assertSame(180, $result[0]->totalMinutes);
+        self::assertSame(0, $result[0]->base25Minutes);
+    }
+
     // -----------------------------------------------------------------------
     // Test harness helpers.
     // -----------------------------------------------------------------------
@@ -247,6 +287,21 @@ final class EmployeeRttSummaryProviderTest extends TestCase
         return $employee;
     }
 
+    private function weekSummary(int $totalMinutes, bool $isFlat, int $base25 = 0, int $base50 = 0): EmployeeRttWeekSummary
+    {
+        return new EmployeeRttWeekSummary(
+            month: 6,
+            weekNumber: 1,
+            weekStart: '2026-06-01',
+            weekEnd: '2026-06-07',
+            overtimeMinutes: $totalMinutes,
+            base25Minutes: $base25,
+            base50Minutes: $base50,
+            totalMinutes: $totalMinutes,
+            isFlatRecovery: $isFlat,
+        );
+    }
+
     /**
      * Build an uninitialized provider with a RequestStack pre-loaded with the given query.
      *
@@ -256,7 +311,7 @@ final class EmployeeRttSummaryProviderTest extends TestCase
      * only setting the properties that the tested private methods actually read:
      * `requestStack` and `phaseResolver`.
      *
-     * @param array<string, string> $request query parameters (year, phaseId, ...)
+     * @param array<string, string> $request
      */
     private function buildProvider(array $request = []): EmployeeRttSummaryProvider
     {