using System.Collections.Generic;
using GeometryTD.CustomEvent;
using GeometryTD.Definition;
using GeometryTD.Procedure;
using NUnit.Framework;

namespace GeometryTD.Tests.EditMode
{
    public sealed class RunStateTests
    {
        [Test]
        public void Factory_Creates_RunState_With_First_Node_Available()
        {
            BackpackInventoryData sourceInventory = new BackpackInventoryData
            {
                Gold = 120
            };
            sourceInventory.ParticipantTowerInstanceIds.Add(11);

            RunState runState = RunStateFactory.Create(
                LevelThemeType.Plain,
                sourceInventory,
                new List<RunNodeSeed>
                {
                    new RunNodeSeed { NodeType = RunNodeType.Combat, LinkedLevelId = 1 },
                    new RunNodeSeed { NodeType = RunNodeType.Event },
                    new RunNodeSeed { NodeType = RunNodeType.BossCombat, LinkedLevelId = 4 }
                },
                "run-test");

            Assert.That(runState.RunId, Is.EqualTo("run-test"));
            Assert.That(runState.ThemeType, Is.EqualTo(LevelThemeType.Plain));
            Assert.That(runState.CurrentNodeIndex, Is.EqualTo(0));
            Assert.That(runState.IsCompleted, Is.False);
            Assert.That(runState.Nodes.Count, Is.EqualTo(3));
            Assert.That(runState.Nodes[0].Status, Is.EqualTo(RunNodeStatus.Available));
            Assert.That(runState.Nodes[1].Status, Is.EqualTo(RunNodeStatus.Locked));
            Assert.That(runState.RunInventorySnapshot.Gold, Is.EqualTo(120));

            sourceInventory.Gold = 1;
            sourceInventory.ParticipantTowerInstanceIds[0] = 99;

            Assert.That(runState.RunInventorySnapshot.Gold, Is.EqualTo(120));
            Assert.That(runState.RunInventorySnapshot.ParticipantTowerInstanceIds[0], Is.EqualTo(11));
        }

        [Test]
        public void AdvanceService_Completes_Run_And_Unlocks_Next_Node()
        {
            RunState runState = RunStateFactory.Create(
                LevelThemeType.Plain,
                new BackpackInventoryData { Gold = 50 },
                new[]
                {
                    new RunNodeSeed { NodeId = 101, NodeType = RunNodeType.Combat, LinkedLevelId = 1 },
                    new RunNodeSeed { NodeId = 102, NodeType = RunNodeType.Shop },
                    new RunNodeSeed { NodeId = 103, NodeType = RunNodeType.BossCombat, LinkedLevelId = 4 }
                });

            bool firstCompleted = RunStateAdvanceService.TryCompleteCurrentNode(
                runState,
                RunNodeCompletionStatus.Completed,
                new BackpackInventoryData { Gold = 80 });

            Assert.That(firstCompleted, Is.True);
            Assert.That(runState.Nodes[0].Status, Is.EqualTo(RunNodeStatus.Completed));
            Assert.That(runState.CurrentNodeIndex, Is.EqualTo(1));
            Assert.That(runState.Nodes[1].Status, Is.EqualTo(RunNodeStatus.Available));
            Assert.That(runState.RunInventorySnapshot.Gold, Is.EqualTo(80));

            RunStateAdvanceService.TryCompleteCurrentNode(
                runState,
                RunNodeCompletionStatus.Completed,
                new BackpackInventoryData { Gold = 95 });
            RunStateAdvanceService.TryCompleteCurrentNode(
                runState,
                RunNodeCompletionStatus.Completed,
                new BackpackInventoryData { Gold = 130 });

            Assert.That(runState.IsCompleted, Is.True);
            Assert.That(runState.CurrentNodeIndex, Is.EqualTo(3));
            Assert.That(runState.CompletedNodeCount, Is.EqualTo(3));
            Assert.That(runState.RunInventorySnapshot.Gold, Is.EqualTo(130));
        }

        [Test]
        public void AdvanceService_Exception_Marks_Current_Node_Exception_Without_Completing_Run()
        {
            RunState runState = RunStateFactory.Create(
                LevelThemeType.Plain,
                new BackpackInventoryData { Gold = 20 },
                new[]
                {
                    new RunNodeSeed { NodeType = RunNodeType.Combat }
                });

            bool result = RunStateAdvanceService.TryCompleteCurrentNode(
                runState,
                RunNodeCompletionStatus.Exception,
                new BackpackInventoryData { Gold = 5 });

            Assert.That(result, Is.True);
            Assert.That(runState.IsCompleted, Is.False);
            Assert.That(runState.CurrentNodeIndex, Is.EqualTo(0));
            Assert.That(runState.CurrentNode.Status, Is.EqualTo(RunNodeStatus.Exception));
            Assert.That(runState.RunInventorySnapshot.Gold, Is.EqualTo(5));
        }

        [Test]
        public void NodeCompleteEventArgs_Clones_Inventory_And_Clears_State()
        {
            BackpackInventoryData inventory = new BackpackInventoryData { Gold = 66 };
            NodeCompleteEventArgs eventArgs = NodeCompleteEventArgs.Create(
                "run-1",
                7,
                RunNodeType.Shop,
                3,
                RunNodeCompletionStatus.Completed,
                true,
                inventory);

            inventory.Gold = 1;

            Assert.That(eventArgs.RunId, Is.EqualTo("run-1"));
            Assert.That(eventArgs.NodeId, Is.EqualTo(7));
            Assert.That(eventArgs.NodeType, Is.EqualTo(RunNodeType.Shop));
            Assert.That(eventArgs.SequenceIndex, Is.EqualTo(3));
            Assert.That(eventArgs.CompletionStatus, Is.EqualTo(RunNodeCompletionStatus.Completed));
            Assert.That(eventArgs.CombatWon, Is.True);
            Assert.That(eventArgs.InventorySnapshotAfterNode.Gold, Is.EqualTo(66));

            eventArgs.Clear();

            Assert.That(eventArgs.RunId, Is.Null);
            Assert.That(eventArgs.NodeId, Is.EqualTo(0));
            Assert.That(eventArgs.NodeType, Is.EqualTo(RunNodeType.None));
            Assert.That(eventArgs.SequenceIndex, Is.EqualTo(-1));
            Assert.That(eventArgs.CompletionStatus, Is.EqualTo(RunNodeCompletionStatus.None));
            Assert.That(eventArgs.CombatWon, Is.False);
            Assert.That(eventArgs.InventorySnapshotAfterNode, Is.Null);
        }

        [Test]
        public void FixedRunNodeSequenceBuilder_Builds_Plain_Ten_Node_Sequence()
        {
            IReadOnlyList<RunNodeSeed> nodeSeeds = FixedRunNodeSequenceBuilder.Build(LevelThemeType.Plain);

            Assert.That(nodeSeeds, Is.Not.Null);
            Assert.That(nodeSeeds.Count, Is.EqualTo(10));

            Assert.That(nodeSeeds[0].NodeType, Is.EqualTo(RunNodeType.Combat));
            Assert.That(nodeSeeds[1].NodeType, Is.EqualTo(RunNodeType.Event));
            Assert.That(nodeSeeds[2].NodeType, Is.EqualTo(RunNodeType.Combat));
            Assert.That(nodeSeeds[3].NodeType, Is.EqualTo(RunNodeType.Shop));
            Assert.That(nodeSeeds[4].NodeType, Is.EqualTo(RunNodeType.Combat));
            Assert.That(nodeSeeds[5].NodeType, Is.EqualTo(RunNodeType.Event));
            Assert.That(nodeSeeds[6].NodeType, Is.EqualTo(RunNodeType.Combat));
            Assert.That(nodeSeeds[7].NodeType, Is.EqualTo(RunNodeType.Shop));
            Assert.That(nodeSeeds[8].NodeType, Is.EqualTo(RunNodeType.Event));
            Assert.That(nodeSeeds[9].NodeType, Is.EqualTo(RunNodeType.BossCombat));

            Assert.That(nodeSeeds[0].LinkedLevelId, Is.EqualTo(1));
            Assert.That(nodeSeeds[2].LinkedLevelId, Is.EqualTo(2));
            Assert.That(nodeSeeds[4].LinkedLevelId, Is.EqualTo(3));
            Assert.That(nodeSeeds[6].LinkedLevelId, Is.EqualTo(1));
            Assert.That(nodeSeeds[9].LinkedLevelId, Is.EqualTo(4));
            Assert.That(nodeSeeds[1].LinkedLevelId, Is.EqualTo(0));
            Assert.That(nodeSeeds[3].LinkedLevelId, Is.EqualTo(0));
        }

        [Test]
        public void FixedRunNodeSequenceBuilder_Returns_Empty_For_Unsupported_Theme()
        {
            IReadOnlyList<RunNodeSeed> nodeSeeds = FixedRunNodeSequenceBuilder.Build(LevelThemeType.Volcano);

            Assert.That(nodeSeeds, Is.Not.Null);
            Assert.That(nodeSeeds.Count, Is.EqualTo(0));
        }

        [Test]
        public void CreateFixedRun_Creates_Ten_Node_Run_And_Completes_After_Ten_Advances()
        {
            RunState runState = RunStateFactory.CreateFixedRun(
                LevelThemeType.Plain,
                new BackpackInventoryData { Gold = 100 },
                "fixed-run");

            Assert.That(runState.RunId, Is.EqualTo("fixed-run"));
            Assert.That(runState.NodeCount, Is.EqualTo(10));
            Assert.That(runState.CurrentNodeIndex, Is.EqualTo(0));
            Assert.That(runState.CurrentNode.NodeType, Is.EqualTo(RunNodeType.Combat));
            Assert.That(runState.Nodes[0].Status, Is.EqualTo(RunNodeStatus.Available));
            Assert.That(runState.Nodes[9].Status, Is.EqualTo(RunNodeStatus.Locked));
            Assert.That(runState.GetNodeBySequenceIndex(9), Is.Not.Null);
            Assert.That(RunState.IsBossNode(runState.GetNodeBySequenceIndex(9)), Is.True);

            for (int i = 0; i < runState.NodeCount; i++)
            {
                bool advanced = RunStateAdvanceService.TryCompleteCurrentNode(
                    runState,
                    RunNodeCompletionStatus.Completed,
                    new BackpackInventoryData { Gold = 100 + i });

                Assert.That(advanced, Is.True);
            }

            Assert.That(runState.IsCompleted, Is.True);
            Assert.That(runState.CompletedNodeCount, Is.EqualTo(10));
            Assert.That(runState.CurrentNodeIndex, Is.EqualTo(10));
            Assert.That(runState.RunInventorySnapshot.Gold, Is.EqualTo(109));
        }
    }
}