feats

src/util/Basketball.js

@@ -0,0 +1,135 @@
+// 模拟比赛得分
+const matches = [
+  [1, 0], [2, 0], [2, 1], [3, 0], [3, 1], [3, 2], [4, 0], [4, 1], [4, 2], [5, 0], [5, 1], [5, 2], [99, 0],
+  [0, 0], [1, 1], [2, 2], [3, 3], [99, 99],
+  [0, 1], [0, 2], [1, 2], [0, 3], [1, 3], [2, 3], [0, 4], [1, 4], [2, 4], [0, 5], [1, 5], [2, 5], [0, 99]
+]
+
+const playWayFunc = {
+  'bst-wl': computeWDL,
+  'bst-wls': computeWDLS,
+  'bst-score': computeScore,
+  'bst-points': computePoints
+}
+
+// 遍历模拟比赛获取最大, 最小奖金
+// rq 让球数
+// ys 预设总分
+export function GetPrice (allParts, rq, ys) {
+  let minPrice
+  let maxPrice
+
+  // 遍历模拟比赛的各种可能
+  matches.forEach(match => {
+    const [min, max] = GetMinAndMax(allParts, match, rq, ys)
+    if (min < minPrice || minPrice === undefined) {
+      minPrice = min
+    }
+
+    if (max > maxPrice || maxPrice === undefined) {
+      maxPrice = max
+    }
+  })
+
+  return [minPrice, maxPrice]
+}
+
+function GetMinAndMax (allParts, match, rq, ys) {
+  let minPrice = 0
+  let maxPrice = 0
+
+  // 所有组合
+  allParts.forEach(parts => {
+    // 每种组合 比如 3串4 是 3个2串1, 1个3串1
+    const price = parts.map(part => {
+      // 场次组合 比如 2串1
+      return part.map(grp => {
+        const { wayCode } = grp.detail
+        const fn = playWayFunc[wayCode]
+        return fn(grp, match, rq, ys)
+      }).filter(Boolean).reduce((acc, x) => acc * x, 1)
+    }).reduce((acc, x) => acc + x, 0)
+
+    if (minPrice === 0 || minPrice > price) {
+      minPrice = price
+    }
+
+    maxPrice += maxPrice
+  })
+
+  return [minPrice, maxPrice]
+}
+
+// 胜平负
+function computeWDL (part, match) {
+  const [x, y] = match
+  const { ruleCode, odds } = part.detail
+
+  switch (ruleCode) {
+    case 'bst-win':
+      return x > y ? odds : 0
+    default:
+      return x < y ? odds : 0
+  }
+}
+
+// 让球胜平负
+function computeWDLS (part, match, rq) {
+  const [x, y] = match
+  const { ruleCode, odds } = part.rules
+
+  switch (ruleCode) {
+    case 'bst-sp-win':
+      return x + rq > y ? odds : 0
+    default:
+      return x + rq < y ? odds : 0
+  }
+}
+
+// 比分
+function computeScore (part, match, rq, ys) {
+  const [x, y] = match
+  const { ruleCode, odds } = part.detail
+
+  switch (ruleCode) {
+    case 'bst-big':
+      return x + y > ys ? odds : 0
+    default:
+      return x + y < ys ? odds : 0
+  }
+}
+
+// 进球数
+function computePoints (part, match) {
+  const [x, y] = match
+  const { ruleCode, odds } = part.rules
+
+  switch (ruleCode) {
+    case 'bst-w15':
+      return x - y >= 1 && x - y <= 5 ? odds : 0
+    case 'bst-w610':
+      return x - y >= 6 && x - y <= 10 ? odds : 0
+    case 'bst-w1115':
+      return x - y >= 11 && x - y <= 15  ? odds : 0
+    case 'bst-w1620':
+      return x - y >= 16 && x - y <= 20 ? odds : 0
+    case 'bst-w2125':
+      return x - y >= 21 && x - y <= 25 ? odds : 0
+    case 'bst-w99':
+      return x - y >= 26 ? odds : 0
+    case 'bst-l15':
+      return y - x >= 1 && y - x <= 5 ? odds : 0
+    case 'bst-l610':
+      return y - x >= 6 && y - x <= 10 ? odds : 0
+    case 'bst-l1115':
+      return y - x >= 11 && y - x <= 15  ? odds : 0
+    case 'bst-l1620':
+      return y - x >= 16 && y - x <= 20 ? odds : 0
+    case 'bst-l2125':
+      return y - x >= 21 && y - x <= 25 ? odds : 0
+    case 'bst-l99':
+      return y - x >= 26 ? odds : 0
+    default:
+      return 0
+  }
+}