using System;
using Unity.Mathematics;
using UnityEngine;

namespace TechbloxModdingAPI
{
    /// <summary>
    /// Represents a blueprint in the inventory. When placed it becomes a block group.
    /// </summary>
    public class Blueprint : IDisposable
    {
        public uint Id { get; }

        internal Blueprint(uint id)
        {
            Id = id;
            BlockGroup._engine.InitBlueprint(id);
            Refresh();
        }

        /// <summary>
        /// The center of the blueprint. Can only be set using the StoreBlocks() method.
        /// </summary>
        public float3 Position { get; private set; }

        /// <summary>
        /// The rotation of the blueprint. Can only be set using the StoreBlocks() method.
        /// </summary>
        public float3 Rotation { get; private set; }

        /// <summary>
        /// The amount of blocks in the blueprint. Gan only be set using the StoreBlocks() method.
        /// </summary>
        public uint BlockCount { get; private set; }

        /// <summary>
        /// Creates a new, empty blueprint. It will be deleted on disposal unless the game holds a reference to it.
        /// </summary>
        /// <returns>A blueprint that doesn't have any blocks</returns>
        public static Blueprint Create()
        {
            return new Blueprint(BlockGroup._engine.CreateBlueprint());
        }

        /// <summary>
        /// Set the blocks that the blueprint contains.
        /// Use the BlockGroup overload for automatically calculated position and rotation.
        /// </summary>
        /// <param name="blocks">The array of blocks to use</param>
        /// <param name="position">The anchor (center) position of the blueprint</param>
        /// <param name="rotation">The base rotation of the blueprint</param>
        public void StoreBlocks(Block[] blocks, float3 position, float3 rotation)
        {
            BlockGroup._engine.ReplaceBlueprint(Player.LocalPlayer.Id, Id, blocks, position,
                quaternion.Euler(rotation));
            Refresh();
        }

        /// <summary>
        /// Store the blocks from the given group in the blueprint with correct position and rotation for the blueprint.
        /// </summary>
        /// <param name="group">The block group to store</param>
        public void StoreBlocks(BlockGroup group)
        {
            BlockGroup._engine.ReplaceBlueprint(Player.LocalPlayer.Id, Id, group, group.Position,
                Quaternion.Euler(group.Rotation));
            Refresh();
        }

        /// <summary>
        /// Places the blocks the blueprint contains at the specified position and rotation.
        /// </summary>
        /// <param name="position">The position of the blueprint</param>
        /// <param name="rotation">The rotation of the blueprint</param>
        /// <returns>An array of the placed blocks</returns>
        public Block[] PlaceBlocks(float3 position, float3 rotation)
        {
            return BlockGroup._engine.PlaceBlueprintBlocks(Id, Player.LocalPlayer.Id, position, rotation);
        }

        /// <summary>
        /// Updates the properties based on the blueprint data. Only necessary if the blueprint is changed from the game.
        /// </summary>
        public void Refresh()
        {
            BlockGroup._engine.GetBlueprintInfo(Id, out var pos, out var rot, out uint count);
            Position = pos;
            Rotation = ((Quaternion) rot).eulerAngles;
            BlockCount = count;
        }

        public void Dispose()
        {
            BlockGroup._engine.DisposeBlueprint(Id);
        }

        public override string ToString()
        {
            return $"{nameof(Id)}: {Id}, {nameof(Position)}: {Position}, {nameof(Rotation)}: {Rotation}, {nameof(BlockCount)}: {BlockCount}";
        }
    }
}