Merge pull request #29 from tphummel/ai/factor-out-pass-line-and-odds-betting-strategy

Author: tphummel

betting.js

@@ -22,26 +22,65 @@ function minPassLineOnly (opts) {
   return bets
 }
 
-function minPassLineMaxOdds (opts) {
-  const bets = minPassLineOnly(opts)
-  const { rules, hand } = opts
-  const makeNewPassOddsBet = hand.isComeOut === false && !bets?.pass?.odds
-  if (process.env.DEBUG) console.log(`[decision] make a new pass odds bet?: ${makeNewPassOddsBet}`)
-
-  if (makeNewPassOddsBet) {
-    const oddsAmount = rules.maxOddsMultiple[hand.point] * bets.pass.line.amount
-    if (process.env.DEBUG) console.log(`[action] make pass odds bet $${oddsAmount}`)
-    bets.pass.odds = {
-      amount: oddsAmount
+function lineMaxOdds ({
+  rules,
+  bets: existingBets,
+  point,
+  shouldMakeLineBet,
+  shouldMakeOddsBet,
+  betKey = 'pass'
+}) {
+  const bets = Object.assign({ new: 0 }, existingBets)
+
+  bets[betKey] = bets[betKey] || {}
+
+  const makeLineBet = shouldMakeLineBet && !bets[betKey].line
+  if (process.env.DEBUG) {
+    console.log(`[decision] make a new ${betKey} line bet?: ${makeLineBet}`)
+  }
+
+  if (makeLineBet) {
+    const newLineBet = { amount: rules.minBet }
+    bets[betKey].line = newLineBet
+    bets.new += newLineBet.amount
+    if (process.env.DEBUG) {
+      console.log(`[action] make ${betKey} line bet $${newLineBet.amount}`)
     }
+  } else if (process.env.DEBUG) {
+    console.log(`[action] ${betKey} line bet unchanged`)
+  }
+
+  const makeOddsBet = shouldMakeOddsBet && bets[betKey].line && !bets[betKey].odds
+  if (process.env.DEBUG) {
+    console.log(`[decision] make a new ${betKey} odds bet?: ${makeOddsBet}`)
+  }
+
+  if (makeOddsBet) {
+    const oddsAmount = rules.maxOddsMultiple[point] * bets[betKey].line.amount
+    bets[betKey].odds = { amount: oddsAmount }
     bets.new += oddsAmount
-  } else {
-    if (process.env.DEBUG) console.log('[decision] skip new pass odds bet')
+    if (process.env.DEBUG) {
+      console.log(`[action] make ${betKey} odds bet $${oddsAmount}`)
+    }
+  } else if (process.env.DEBUG) {
+    console.log(`[decision] skip new ${betKey} odds bet`)
   }
 
   return bets
 }
 
+function minPassLineMaxOdds (opts) {
+  const { rules, hand } = opts
+  return lineMaxOdds({
+    rules,
+    bets: opts.bets,
+    point: hand.point,
+    shouldMakeLineBet: hand.isComeOut,
+    shouldMakeOddsBet: hand.isComeOut === false,
+    betKey: 'pass'
+  })
+}
+
 function placeSixEight (opts) {
   const { rules, bets: existingBets = {}, hand } = opts
   const bets = Object.assign({ new: 0 }, existingBets)
@@ -108,6 +147,7 @@ function minPassLineMaxOddsPlaceSixEight (opts) {
 
 module.exports = {
   minPassLineOnly,
+  lineMaxOdds,
   minPassLineMaxOdds,
   placeSixEight,
   placeSixEightUnlessPoint,

betting.test.js

@@ -96,6 +96,68 @@ tap.test('minPassLineOnly: bet exists, point set', (t) => {
   t.end()
 })
 
+tap.test('lineMaxOdds: new line bet only', (t) => {
+  const rules = {
+    minBet: 5,
+    maxOddsMultiple: {
+      4: 3,
+      5: 4,
+      6: 5,
+      8: 5,
+      9: 4,
+      10: 3
+    }
+  }
+
+  const hand = { isComeOut: true }
+
+  const updatedBets = lib.lineMaxOdds({
+    rules,
+    hand,
+    shouldMakeLineBet: true,
+    shouldMakeOddsBet: false,
+    point: 4,
+    betKey: 'pass'
+  })
+
+  t.equal(updatedBets.pass.line.amount, rules.minBet)
+  t.equal(updatedBets.new, rules.minBet)
+
+  t.end()
+})
+
+tap.test('lineMaxOdds: add odds to existing line bet', (t) => {
+  const rules = {
+    minBet: 5,
+    maxOddsMultiple: {
+      4: 3,
+      5: 4,
+      6: 5,
+      8: 5,
+      9: 4,
+      10: 3
+    }
+  }
+
+  const hand = { isComeOut: false, point: 6 }
+  const bets = { pass: { line: { amount: rules.minBet } } }
+
+  const updatedBets = lib.lineMaxOdds({
+    rules,
+    hand,
+    bets,
+    shouldMakeLineBet: false,
+    shouldMakeOddsBet: true,
+    point: hand.point,
+    betKey: 'pass'
+  })
+
+  t.equal(updatedBets.pass.odds.amount, rules.maxOddsMultiple['6'] * rules.minBet)
+  t.equal(updatedBets.new, updatedBets.pass.odds.amount)
+
+  t.end()
+})
+
 tap.test('minPassLineMaxOdds: make new bet upon establishing point', (t) => {
   const rules = {
     minBet: 5,