Removed bugs from Bucket.cs and Well.cs

Added working FightFire method from Person.cs

BucketChain/Bucket.cs

@@ -32,17 +32,18 @@ public sealed class Bucket
     /// <returns>The amount taken for filling the bucket</returns>
     public double Fill(double maxAvailable)
     {
-        if (_capacityLiters - _contentLiters <= 0D)
+        if (_capacityLiters - _contentLiters <= 0D || maxAvailable <= 0D)
         {
             return 0D;
         }
 
-        maxAvailable = Math.Abs(_capacityLiters - maxAvailable);
+        var amountTaken = _contentLiters;
         _contentLiters = _contentLiters + maxAvailable > _capacityLiters
             ? _capacityLiters
             : _contentLiters + maxAvailable;
         
-        return maxAvailable;
+        amountTaken -= _contentLiters;
+        return Math.Abs(amountTaken);
     }
 
     /// <summary>

BucketChain/Person.cs

@@ -21,7 +21,7 @@ public sealed class Person
     /// <summary>
     ///     Gets if the person currently has at least one bucket (forward or backward).
     /// </summary>
-    public bool HasBucket => false; // TODO
+    public bool HasBucket => _forwardBucket != null || _backwardBucket != null;
 
     /// <summary>
     ///     Gets the left neighbor of the person. Can be null.
@@ -50,7 +50,25 @@ public sealed class Person
     ///     neighbor of this person; otherwise it will become the right hand side neighbor</param>
     public void JoinChain(Person neighbor, bool isLeftNeighbor)
     {
-        // TODO
+        // expect that that all neighbors of the new person are null
+        // so that way we truly know that the provided person is new
+        if (neighbor.LeftNeighbor == null || neighbor.RightNeighbor == null)
+        {
+            return;
+        }
+        
+        var thisNeighbor = isLeftNeighbor ? LeftNeighbor : RightNeighbor;
+        thisNeighbor?.JoinChain(neighbor, isLeftNeighbor);
+        if (isLeftNeighbor)
+        {
+            neighbor.RightNeighbor = this;
+            LeftNeighbor = neighbor;
+        }
+        else
+        {
+            neighbor.LeftNeighbor = this;
+            RightNeighbor = neighbor;
+        }
     }
 
     /// <summary>
@@ -66,7 +84,29 @@ public sealed class Person
     ///     that a bucket was moved, only that no invalid state was detected; false otherwise</returns>
     public bool MoveBucket(int currentStep)
     {
-        // TODO
+        if (currentStep < 0 || currentStep == LastStepPerformed || RightNeighbor == null)
+        {
+            return false;
+        }
+        
+        if(RightNeighbor.HasBucket)
+        {
+            if (RightNeighbor._backwardBucket != null && _forwardBucket == null)
+            {
+                _forwardBucket = RightNeighbor._backwardBucket;
+                RightNeighbor._backwardBucket = null;
+                LastStepPerformed = currentStep;
+                return true;
+            }
+            if (RightNeighbor._forwardBucket != null && _backwardBucket == null)
+            {
+                _backwardBucket = RightNeighbor._forwardBucket;
+                RightNeighbor._forwardBucket = null;
+                LastStepPerformed = currentStep;
+                return true;
+            }
+        }
+        
         return false;
     }
 
@@ -77,7 +117,9 @@ public sealed class Person
     /// <param name="fire">The fire to throw water at</param>
     public void FightFire(Fire fire)
     {
-        // TODO
+        var amount = _forwardBucket?.Empty();
+        fire.GetHitByWater(amount ?? 0);
+        _backwardBucket = _forwardBucket;
     }
 
     /// <summary>

BucketChain/Well.cs

@@ -19,6 +19,7 @@ public sealed class Well
     {
         _maxCapacity = maxCapacity;
         _refillRate = refillRate;
+        LitersRemaining = maxCapacity;
     }
 
     /// <summary>
@@ -54,5 +55,5 @@ public sealed class Well
     ///     Shows the current and max. amount of liters - rounded to whole numbers.
     /// </summary>
     /// <returns>String representation of the well</returns>
-    public override string ToString() => $"💧 {LitersRemaining}/{_maxCapacity}";
+    public override string ToString() => $"💧 {Math.Round(LitersRemaining)}/{Math.Round(_maxCapacity)}";
 }