重构 API 为 8 领域 + 应用层架构

将后端模块拆分为 domains、applications、shared 三层，结算计算器移入 domain 纯函数目录，API 路径与测试保持不变。

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/src/domains/settlement/domain/settlement-calculator.spec.ts

@@ -0,0 +1,187 @@
+import {
+  settleSelection,
+  calculatePayout,
+  calculateParlayPayout,
+  isQuarterHandicapOrTotal,
+  ScoreInput,
+} from './settlement-calculator';
+
+describe('SettlementCalculator', () => {
+  const score: ScoreInput = { htHome: 1, htAway: 0, ftHome: 2, ftAway: 1 };
+
+  describe('FT_1X2', () => {
+    it('S001: home win', () => {
+      expect(
+        settleSelection({ marketType: 'FT_1X2', selectionCode: 'HOME', score }),
+      ).toBe('WIN');
+      expect(
+        settleSelection({ marketType: 'FT_1X2', selectionCode: 'DRAW', score }),
+      ).toBe('LOSE');
+    });
+
+    it('S002: draw', () => {
+      const draw = { htHome: 0, htAway: 0, ftHome: 1, ftAway: 1 };
+      expect(
+        settleSelection({ marketType: 'FT_1X2', selectionCode: 'DRAW', score: draw }),
+      ).toBe('WIN');
+    });
+  });
+
+  describe('HT_1X2', () => {
+    it('S003: half time result', () => {
+      expect(
+        settleSelection({ marketType: 'HT_1X2', selectionCode: 'HOME', score }),
+      ).toBe('WIN');
+    });
+  });
+
+  describe('FT_ODD_EVEN', () => {
+    it('S004: 0-0 is even', () => {
+      const s = { htHome: 0, htAway: 0, ftHome: 0, ftAway: 0 };
+      expect(
+        settleSelection({ marketType: 'FT_ODD_EVEN', selectionCode: 'EVEN', score: s }),
+      ).toBe('WIN');
+    });
+  });
+
+  describe('Correct Score', () => {
+    it('S005: exact score 2-1', () => {
+      expect(
+        settleSelection({
+          marketType: 'FT_CORRECT_SCORE',
+          selectionCode: 'SCORE_2_1',
+          score,
+        }),
+      ).toBe('WIN');
+    });
+
+    it('S006: other home win', () => {
+      const s = { htHome: 2, htAway: 0, ftHome: 5, ftAway: 0 };
+      expect(
+        settleSelection({
+          marketType: 'FT_CORRECT_SCORE',
+          selectionCode: 'OTHER_HOME',
+          score: s,
+          templateScores: ['SCORE_1_0', 'SCORE_2_0'],
+        }),
+      ).toBe('WIN');
+    });
+
+    it('S008: second half correct score', () => {
+      expect(
+        settleSelection({
+          marketType: 'SH_CORRECT_SCORE',
+          selectionCode: 'SCORE_1_1',
+          score,
+        }),
+      ).toBe('WIN');
+    });
+  });
+
+  describe('Handicap', () => {
+    it('S009: full win', () => {
+      const r = settleSelection({
+        marketType: 'FT_HANDICAP',
+        selectionCode: 'HOME',
+        handicapLine: -1,
+        score: { htHome: 0, htAway: 0, ftHome: 2, ftAway: 0 },
+      });
+      expect(r).toBe('WIN');
+      expect(calculatePayout(100, 1.85, r).toNumber()).toBe(185);
+    });
+
+    it('S010: push', () => {
+      const r = settleSelection({
+        marketType: 'FT_HANDICAP',
+        selectionCode: 'HOME',
+        handicapLine: -1,
+        score: { htHome: 0, htAway: 0, ftHome: 1, ftAway: 0 },
+      });
+      expect(r).toBe('PUSH');
+      expect(calculatePayout(100, 1.85, r).toNumber()).toBe(100);
+    });
+
+    it('S011: half win -0.25', () => {
+      const r = settleSelection({
+        marketType: 'FT_HANDICAP',
+        selectionCode: 'HOME',
+        handicapLine: -0.25,
+        score: { htHome: 0, htAway: 0, ftHome: 0, ftAway: 0 },
+      });
+      expect(r).toBe('HALF_LOSE');
+    });
+  });
+
+  describe('Over/Under', () => {
+    it('S013: over 2.5 wins with 3 goals', () => {
+      const s = { htHome: 1, htAway: 1, ftHome: 2, ftAway: 1 };
+      expect(
+        settleSelection({
+          marketType: 'FT_OVER_UNDER',
+          selectionCode: 'OVER',
+          totalLine: 2.5,
+          score: s,
+        }),
+      ).toBe('WIN');
+    });
+
+    it('S014: push on integer line', () => {
+      const s = { htHome: 1, htAway: 0, ftHome: 1, ftAway: 1 };
+      expect(
+        settleSelection({
+          marketType: 'FT_OVER_UNDER',
+          selectionCode: 'OVER',
+          totalLine: 2,
+          score: s,
+        }),
+      ).toBe('PUSH');
+    });
+  });
+
+  describe('Parlay', () => {
+    it('S016: all win', () => {
+      const result = calculateParlayPayout(100, [
+        { odds: 1.8, result: 'WIN' },
+        { odds: 2.0, result: 'WIN' },
+      ]);
+      expect(result.betResult).toBe('WON');
+      expect(result.payout.toNumber()).toBe(360);
+    });
+
+    it('S017: one lose', () => {
+      const result = calculateParlayPayout(100, [
+        { odds: 1.8, result: 'WIN' },
+        { odds: 2.0, result: 'LOSE' },
+      ]);
+      expect(result.betResult).toBe('LOST');
+      expect(result.payout.toNumber()).toBe(0);
+    });
+
+    it('S018: one push', () => {
+      const result = calculateParlayPayout(100, [
+        { odds: 1.8, result: 'WIN' },
+        { odds: 2.0, result: 'PUSH' },
+        { odds: 1.9, result: 'WIN' },
+      ]);
+      expect(result.betResult).toBe('WON');
+      expect(result.payout.toNumber()).toBe(342);
+    });
+
+    it('S019: all push', () => {
+      const result = calculateParlayPayout(100, [
+        { odds: 1.8, result: 'PUSH' },
+        { odds: 2.0, result: 'VOID' },
+      ]);
+      expect(result.betResult).toBe('PUSH');
+      expect(result.payout.toNumber()).toBe(100);
+    });
+  });
+
+  describe('Quarter line detection', () => {
+    it('detects quarter lines', () => {
+      expect(isQuarterHandicapOrTotal(-0.25)).toBe(true);
+      expect(isQuarterHandicapOrTotal(2.5)).toBe(false);
+      expect(isQuarterHandicapOrTotal(-1)).toBe(false);
+    });
+  });
+});