Add dumb bots feature

2 files changed, 99 insertions, 0 deletions

diff --git a/sw-bot/build.gradle.kts b/sw-bot/build.gradle.kts
new file mode 100644
index 00000000..fd4de5e0
--- /dev/null
+++ b/sw-bot/build.gradle.kts
@@ -0,0 +1,11 @@
+plugins {
+    kotlin("jvm")
+    id("org.jlleitschuh.gradle.ktlint")
+}
+
+dependencies {
+    implementation(project(":sw-client"))
+    implementation(kotlin("stdlib-jdk8"))
+    testImplementation(kotlin("test"))
+    testImplementation(kotlin("test-junit"))
+}
diff --git a/sw-bot/src/main/kotlin/org/luxons/sevenwonders/bot/SevenWondersBot.kt b/sw-bot/src/main/kotlin/org/luxons/sevenwonders/bot/SevenWondersBot.kt
new file mode 100644
index 00000000..deb7e237
--- /dev/null
+++ b/sw-bot/src/main/kotlin/org/luxons/sevenwonders/bot/SevenWondersBot.kt
@@ -0,0 +1,88 @@
+package org.luxons.sevenwonders.bot
+
+import kotlinx.coroutines.coroutineScope
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withTimeout
+import org.luxons.sevenwonders.client.SevenWondersClient
+import org.luxons.sevenwonders.client.SevenWondersSession
+import org.luxons.sevenwonders.model.Action
+import org.luxons.sevenwonders.model.MoveType
+import org.luxons.sevenwonders.model.PlayerMove
+import org.luxons.sevenwonders.model.PlayerTurnInfo
+import org.luxons.sevenwonders.model.resources.noTransactions
+import kotlin.random.Random
+import kotlin.time.Duration
+import kotlin.time.ExperimentalTime
+import kotlin.time.hours
+
+@OptIn(ExperimentalTime::class)
+data class BotConfig(
+    val minActionDelayMillis: Long = 500,
+    val maxActionDelayMillis: Long = 1000,
+    val globalTimeout: Duration = 10.hours
+)
+
+@OptIn(ExperimentalTime::class)
+class SevenWondersBot(
+    private val displayName: String,
+    private val botConfig: BotConfig = BotConfig()
+) {
+    private val client = SevenWondersClient()
+
+    suspend fun play(serverHost: String, gameId: Long) = withTimeout(botConfig.globalTimeout) {
+        val session = client.connect(serverHost)
+        botDelay()
+        session.chooseName(displayName)
+        botDelay()
+        session.joinGame(gameId)
+        botDelay()
+        session.awaitGameStart(gameId)
+
+        coroutineScope {
+            launch {
+                session.watchTurns().first { turn ->
+                    botDelay()
+                    val keepPlaying = session.playTurn(turn)
+                    !keepPlaying
+                }
+            }
+            botDelay()
+            session.sayReady() // triggers the first turn
+        }
+        session.disconnect()
+    }
+
+    private suspend fun botDelay() {
+        delay(Random.nextLong(botConfig.minActionDelayMillis, botConfig.maxActionDelayMillis))
+    }
+
+    private suspend fun SevenWondersSession.playTurn(turn: PlayerTurnInfo): Boolean {
+        when (turn.action) {
+            Action.PLAY, Action.PLAY_2, Action.PLAY_LAST -> prepareMove(createPlayCardMove(turn))
+            Action.PICK_NEIGHBOR_GUILD -> prepareMove(createPickGuildMove(turn))
+            Action.SAY_READY -> sayReady()
+            Action.WAIT -> Unit
+            Action.WATCH_SCORE -> return false
+        }
+        return true
+    }
+}
+
+private fun createPlayCardMove(turnInfo: PlayerTurnInfo): PlayerMove {
+    val wonderBuildability = turnInfo.wonderBuildability
+    if (wonderBuildability.isBuildable) {
+        val transactions = wonderBuildability.cheapestTransactions.first()
+        return PlayerMove(MoveType.UPGRADE_WONDER, turnInfo.hand!!.first().name, transactions)
+    }
+    val playableCard = turnInfo.hand!!.firstOrNull { it.playability.isPlayable }
+    return if (playableCard != null) {
+        PlayerMove(MoveType.PLAY, playableCard.name, playableCard.playability.cheapestTransactions.first())
+    } else {
+        PlayerMove(MoveType.DISCARD, turnInfo.hand!!.first().name, noTransactions())
+    }
+}
+
+private fun createPickGuildMove(turnInfo: PlayerTurnInfo): PlayerMove =
+    PlayerMove(MoveType.COPY_GUILD, turnInfo.neighbourGuildCards.first().name)