now with more details!

main/main.go

@@ -4,10 +4,21 @@ import (
 	"fmt"
 	"git.chromaticdragon.app/kistaro/auctionsim/auctionsim"
 	"log"
+	"math"
 	"os"
 	"strconv"
 )
 
+func deltaStr(delta float64) string {
+	if delta > 0 {
+		return fmt.Sprintf("gained ¤%f", delta)
+	}
+	if delta < 0 {
+		return fmt.Sprintf("lost ¤%f", -delta)
+	}
+	return "broken even"
+}
+
 func main() {
 	num := int64(1000)
 	if len(os.Args) > 1 {
@@ -21,23 +32,54 @@ func main() {
 		log.Fatalf("can't run an auction with %d bidders", num)
 	}
 
-	price, bidder := auctionsim.RunAuction(
+	price, allBidders := auctionsim.RunAuctionVerbosely(
 		&auctionsim.CappedBidderGenerator{
 			G:   auctionsim.NormalestBidderGenerator(),
 			Lim: num,
 		},
 	)
+	bidder := allBidders[len(allBidders)-1]
 
-	delta := bidder.Value - price
+	fmt.Printf("The auction winner paid ¤%f. They have %s.\n", price, deltaStr(bidder.Value-price))
-	valueStr := "gaining nothing"
-	if delta > 0 {
-		valueStr = fmt.Sprintf("gaining ¤%f", delta)
-	}
-	if delta < 0 {
-		valueStr = fmt.Sprintf("losing ¤%f", -delta)
-	}
-
-	fmt.Printf("The auction winner paid ¤%f, %s.\n", price, valueStr)
 	fmt.Printf("The item was worth ¤%f to them.\n", bidder.Value)
 	fmt.Printf("They would have paid up to ¤%f for it.\n", bidder.BidCeiling())
+
+	fmt.Println()
+	i := len(allBidders) - 2
+	for i >= 0 && allBidders[i].Value < price {
+		i--
+	}
+
+	if i < 0 {
+		fmt.Printf("The item was not worth that to anybody.\n")
+	} else {
+		rube := allBidders[i]
+		fmt.Printf("The highest bidder who would have made a profit at that price stopped bidding at ¤%f.\n", rube.BidCeiling())
+		fmt.Printf("They should have kept bidding until ¤%f.\n", rube.Value)
+		if rankDelta := len(allBidders) - i - 1; rankDelta == 1 {
+			fmt.Println("They were outbid by 1 bidder.")
+		} else {
+			fmt.Printf("They were outbid by %d bidders.\n", rankDelta)
+		}
+		fmt.Printf("If they had paid the amount of the winning bid, they would have %s.\n", deltaStr(rube.Value-price))
+	}
+
+	fmt.Println()
+	maxValue := math.Inf(-1)
+	maxIdx := -1
+	for i, b := range allBidders {
+		if b.Value > maxValue {
+			maxValue = b.Value
+			maxIdx = i
+		}
+	}
+
+	if maxIdx == -1 {
+		fmt.Println("Wow! It was infinitely beyond worthless to everybody.")
+	} else {
+		fmt.Printf("The bidder who would have gotten the most value was outbid by %d bidders.\n", len(allBidders)-maxIdx-1)
+		rube := allBidders[maxIdx]
+		fmt.Printf("The item was worth at most ¤%f to them. Their maximum bid was ¤%f.\n", rube.Value, rube.BidCeiling())
+		fmt.Printf("If they had paid the winning bid, they would have %s.\n", deltaStr(rube.Value-price))
+	}
 }