using System.Collections.Generic;
using GeometryTD.Definition;
using GeometryTD.Procedure;

namespace GeometryTD.Factory
{
    public static class RunStateFactory
    {
        public static RunState CreateFixedRun(
            LevelThemeType themeType,
            BackpackInventoryData initialInventorySnapshot,
            string runId = null,
            int runSeed = 0)
        {
            IReadOnlyList<RunNodeSeed> fixedNodeSeeds = FixedRunNodeSequenceBuilder.Build(themeType);
            return Create(themeType, initialInventorySnapshot, fixedNodeSeeds, runId, runSeed);
        }

        public static RunState Create(
            LevelThemeType themeType,
            BackpackInventoryData initialInventorySnapshot,
            IEnumerable<RunNodeSeed> nodeSeeds,
            string runId = null,
            int runSeed = 0)
        {
            List<RunNodeState> nodes = new List<RunNodeState>();
            if (nodeSeeds != null)
            {
                int sequenceIndex = 0;
                foreach (RunNodeSeed seed in nodeSeeds)
                {
                    if (seed == null)
                    {
                        continue;
                    }

                    nodes.Add(new RunNodeState
                    {
                        NodeId = seed.NodeId > 0 ? seed.NodeId : sequenceIndex + 1,
                        NodeType = seed.NodeType,
                        ThemeType = seed.ThemeType == LevelThemeType.None ? themeType : seed.ThemeType,
                        LinkedLevelId = seed.LinkedLevelId,
                        SequenceIndex = seed.SequenceIndex >= 0 ? seed.SequenceIndex : sequenceIndex,
                        Status = sequenceIndex == 0 ? RunNodeStatus.Available : RunNodeStatus.Locked
                    });
                    sequenceIndex++;
                }
            }

            return new RunState(runId, runSeed, themeType, nodes, initialInventorySnapshot);
        }

        public static int CreateRunSeed()
        {
            int seed = System.Guid.NewGuid().GetHashCode();
            return seed == 0 ? 1 : seed;
        }
    }
}