/******************************************************************************
 * Spine Runtimes License Agreement
 * Last updated January 1, 2020. Replaces all prior versions.
 *
 * Copyright (c) 2013-2020, Esoteric Software LLC
 *
 * Integration of the Spine Runtimes into software or otherwise creating
 * derivative works of the Spine Runtimes is permitted under the terms and
 * conditions of Section 2 of the Spine Editor License Agreement:
 * http://esotericsoftware.com/spine-editor-license
 *
 * Otherwise, it is permitted to integrate the Spine Runtimes into software
 * or otherwise create derivative works of the Spine Runtimes (collectively,
 * "Products"), provided that each user of the Products must obtain their own
 * Spine Editor license and redistribution of the Products in any form must
 * include this license and copyright notice.
 *
 * THE SPINE RUNTIMES ARE PROVIDED BY ESOTERIC SOFTWARE LLC "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL ESOTERIC SOFTWARE LLC BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES,
 * BUSINESS INTERRUPTION, OR LOSS OF USE, DATA, OR PROFITS) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THE SPINE RUNTIMES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *****************************************************************************/

using System;
using System.Collections;
using UnityEngine;

namespace Spine.Unity {

	[AttributeUsage(AttributeTargets.Field, Inherited = true, AllowMultiple = false)]
	public abstract class SpineAttributeBase : PropertyAttribute {
		public string dataField = "";
		public string startsWith = "";
		public bool includeNone = true;
		public bool fallbackToTextField = false;
	}

	public class SpineBone : SpineAttributeBase {
		/// <summary>
		/// Smart popup menu for Spine Bones
		/// </summary>
		/// <param name="startsWith">Filters popup results to elements that begin with supplied string.</param>
		/// <param name="includeNone">If true, the dropdown list will include a "none" option which stored as an empty string.</param>
		/// <param name = "fallbackToTextField">If true, and an animation list source can't be found, the field will fall back to a normal text field. If false, it will show an error.</param>
		/// <param name="dataField">If specified, a locally scoped field with the name supplied by in dataField will be used to fill the popup results.
		/// Valid types are SkeletonDataAsset and SkeletonRenderer (and derivatives)
		/// If left empty and the script the attribute is applied to is derived from Component, GetComponent<SkeletonRenderer>() will be called as a fallback.
		/// </param>
		public SpineBone (string startsWith = "", string dataField = "", bool includeNone = true, bool fallbackToTextField = false) {
			this.startsWith = startsWith;
			this.dataField = dataField;
			this.includeNone = includeNone;
			this.fallbackToTextField = fallbackToTextField;
		}

		public static Spine.Bone GetBone (string boneName, SkeletonRenderer renderer) {
			return renderer.skeleton == null ? null : renderer.skeleton.FindBone(boneName);
		}

		public static Spine.BoneData GetBoneData (string boneName, SkeletonDataAsset skeletonDataAsset) {
			var data = skeletonDataAsset.GetSkeletonData(true);
			return data.FindBone(boneName);
		}
	}

	public class SpineSlot : SpineAttributeBase {
		public bool containsBoundingBoxes = false;

		/// <summary>
		/// Smart popup menu for Spine Slots
		/// </summary>
		/// <param name="startsWith">Filters popup results to elements that begin with supplied string.</param>
		/// <param name="containsBoundingBoxes">Disables popup results that don't contain bounding box attachments when true.</param>
		/// <param name = "includeNone">If true, the dropdown list will include a "none" option which stored as an empty string.</param>
		/// <param name = "fallbackToTextField">If true, and an animation list source can't be found, the field will fall back to a normal text field. If false, it will show an error.</param>
		/// <param name="dataField">If specified, a locally scoped field with the name supplied by in dataField will be used to fill the popup results.
		/// Valid types are SkeletonDataAsset and SkeletonRenderer (and derivatives).
		/// If left empty and the script the attribute is applied to is derived from Component, GetComponent<SkeletonRenderer>() will be called as a fallback.
		/// </param>
		public SpineSlot (string startsWith = "", string dataField = "", bool containsBoundingBoxes = false, bool includeNone = true, bool fallbackToTextField = false) {
			this.startsWith = startsWith;
			this.dataField = dataField;
			this.containsBoundingBoxes = containsBoundingBoxes;
			this.includeNone = includeNone;
			this.fallbackToTextField = fallbackToTextField;
		}
	}

	public class SpineAnimation : SpineAttributeBase {
		/// <summary>
		/// Smart popup menu for Spine Animations
		/// </summary>
		/// <param name="startsWith">Filters popup results to elements that begin with supplied string.</param>
		/// <param name = "fallbackToTextField">If true, and an animation list source can't be found, the field will fall back to a normal text field. If false, it will show an error.</param>
		/// <param name="includeNone">If true, the dropdown list will include a "none" option which stored as an empty string.</param>
		/// <param name="dataField">If specified, a locally scoped field with the name supplied by in dataField will be used to fill the popup results.
		/// Valid types are SkeletonDataAsset and SkeletonRenderer (and derivatives)
		/// If left empty and the script the attribute is applied to is derived from Component, GetComponent<SkeletonRenderer>() will be called as a fallback.
		/// </param>
		public SpineAnimation (string startsWith = "", string dataField = "", bool includeNone = true, bool fallbackToTextField = false) {
			this.startsWith = startsWith;
			this.dataField = dataField;
			this.includeNone = includeNone;
			this.fallbackToTextField = fallbackToTextField;
		}
	}

	public class SpineEvent : SpineAttributeBase {
		/// <summary>
		/// Smart popup menu for Spine Events (Spine.EventData)
		/// </summary>
		/// <param name="startsWith">Filters popup results to elements that begin with supplied string.</param>
		/// <param name = "includeNone">If true, the dropdown list will include a "none" option which stored as an empty string.</param>
		/// <param name="dataField">If specified, a locally scoped field with the name supplied by in dataField will be used to fill the popup results.
		/// Valid types are SkeletonDataAsset and SkeletonRenderer (and derivatives).
		/// If left empty and the script the attribute is applied to is derived from Component, GetComponent(SkeletonRenderer)() will be called as a fallback.
		/// </param>
		/// <param name="fallbackToTextField">If true, and an animation list source can't be found, the field will fall back to a normal text field. If false, it will show an error.</param>

		public bool audioOnly = false;

		public SpineEvent (string startsWith = "", string dataField = "", bool includeNone = true, bool fallbackToTextField = false, bool audioOnly = false) {
			this.startsWith = startsWith;
			this.dataField = dataField;
			this.includeNone = includeNone;
			this.fallbackToTextField = fallbackToTextField;
			this.audioOnly = audioOnly;
		}
	}

	public class SpineIkConstraint : SpineAttributeBase {
		/// <summary>
		/// Smart popup menu for Spine IK Constraints (Spine.IkConstraint)
		/// </summary>
		/// <param name="startsWith">Filters popup results to elements that begin with supplied string.</param>
		/// <param name = "includeNone">If true, the dropdown list will include a "none" option which stored as an empty string.</param>
		/// <param name="dataField">If specified, a locally scoped field with the name supplied by in dataField will be used to fill the popup results.
		/// Valid types are SkeletonDataAsset and SkeletonRenderer (and derivatives).
		/// If left empty and the script the attribute is applied to is derived from Component, GetComponent(SkeletonRenderer)() will be called as a fallback.
		/// </param>
		/// <param name = "fallbackToTextField">If true, and an animation list source can't be found, the field will fall back to a normal text field. If false, it will show an error.</param>
		public SpineIkConstraint (string startsWith = "", string dataField = "", bool includeNone = true, bool fallbackToTextField = false) {
			this.startsWith = startsWith;
			this.dataField = dataField;
			this.includeNone = includeNone;
			this.fallbackToTextField = fallbackToTextField;
		}
	}

	public class SpineTransformConstraint : SpineAttributeBase {
		/// <summary>
		/// Smart popup menu for Spine Transform Constraints (Spine.TransformConstraint)
		/// </summary>
		/// <param name="startsWith">Filters popup results to elements that begin with supplied string.</param>
		/// <param name = "includeNone">If true, the dropdown list will include a "none" option which stored as an empty string.</param>
		/// <param name = "fallbackToTextField">If true, and an animation list source can't be found, the field will fall back to a normal text field. If false, it will show an error.</param>
		/// <param name="dataField">If specified, a locally scoped field with the name supplied by in dataField will be used to fill the popup results.
		/// Valid types are SkeletonDataAsset and SkeletonRenderer (and derivatives).
		/// If left empty and the script the attribute is applied to is derived from Component, GetComponent<SkeletonRenderer>() will be called as a fallback.
		/// </param>
		public SpineTransformConstraint (string startsWith = "", string dataField = "", bool includeNone = true, bool fallbackToTextField = false) {
			this.startsWith = startsWith;
			this.dataField = dataField;
			this.includeNone = includeNone;
			this.fallbackToTextField = fallbackToTextField;
		}
	}

	public class SpinePathConstraint : SpineAttributeBase {
		/// <summary>
		/// Smart popup menu for Spine Events (Spine.PathConstraint)
		/// </summary>
		/// <param name="startsWith">Filters popup results to elements that begin with supplied string.</param>
		/// <param name = "includeNone">If true, the dropdown list will include a "none" option which stored as an empty string.</param>
		/// <param name="dataField">If specified, a locally scoped field with the name supplied by in dataField will be used to fill the popup results.
		/// Valid types are SkeletonDataAsset and SkeletonRenderer (and derivatives).
		/// If left empty and the script the attribute is applied to is derived from Component, GetComponent(SkeletonRenderer)() will be called as a fallback.
		/// </param>
		public SpinePathConstraint (string startsWith = "", string dataField = "", bool includeNone = true, bool fallbackToTextField = false) {
			this.startsWith = startsWith;
			this.dataField = dataField;
			this.includeNone = includeNone;
			this.fallbackToTextField = fallbackToTextField;
		}
	}

	public class SpineSkin : SpineAttributeBase {
		/// <summary>
		/// Smart popup menu for Spine Skins
		/// </summary>
		/// <param name="startsWith">Filters popup results to elements that begin with supplied string.</param>
		/// <param name = "includeNone">If true, the dropdown list will include a "none" option which stored as an empty string.</param>
		/// <param name = "fallbackToTextField">If true, and an animation list source can't be found, the field will fall back to a normal text field. If false, it will show an error.</param>
		/// <param name = "defaultAsEmptyString">If true, the default choice will be serialized as an empty string.</param>
		/// <param name="dataField">If specified, a locally scoped field with the name supplied by in dataField will be used to fill the popup results.
		/// Valid types are SkeletonDataAsset and SkeletonRenderer (and derivatives)
		/// If left empty and the script the attribute is applied to is derived from Component, GetComponent<SkeletonRenderer>() will be called as a fallback.
		/// </param>

		public bool defaultAsEmptyString = false;

		public SpineSkin (string startsWith = "", string dataField = "", bool includeNone = true, bool fallbackToTextField = false, bool defaultAsEmptyString = false) {
			this.startsWith = startsWith;
			this.dataField = dataField;
			this.includeNone = includeNone;
			this.fallbackToTextField = fallbackToTextField;
			this.defaultAsEmptyString = defaultAsEmptyString;
		}
	}

	public class SpineAttachment : SpineAttributeBase {
		public bool returnAttachmentPath = false;
		public bool currentSkinOnly = false;
		public bool placeholdersOnly = false;
		public string skinField = "";
		public string slotField = "";

		/// <summary>
		/// Smart popup menu for Spine Attachments
		/// </summary>
		/// <param name="currentSkinOnly">Filters popup results to only include the current Skin. Only valid when a SkeletonRenderer is the data source.</param>
		/// <param name="returnAttachmentPath">Returns a fully qualified path for an Attachment in the format "Skin/Slot/AttachmentName". This path format is only used by the SpineAttachment helper methods like SpineAttachment.GetAttachment and .GetHierarchy. Do not use full path anywhere else in Spine's system.</param>
		/// <param name="placeholdersOnly">Filters popup results to exclude attachments that are not children of Skin Placeholders</param>
		/// <param name="slotField">If specified, a locally scoped field with the name supplied by in slotField will be used to limit the popup results to children of a named slot</param>
		/// <param name="skinField">If specified, a locally scoped field with the name supplied by in skinField will be used to limit the popup results to entries of the named skin</param>
		/// <param name="includeNone">If true, the dropdown list will include a "none" option which stored as an empty string.</param>
		/// <param name = "fallbackToTextField">If true, and an animation list source can't be found, the field will fall back to a normal text field. If false, it will show an error.</param>
		/// <param name="dataField">If specified, a locally scoped field with the name supplied by in dataField will be used to fill the popup results.
		/// Valid types are SkeletonDataAsset and SkeletonRenderer (and derivatives)
		/// If left empty and the script the attribute is applied to is derived from Component, GetComponent<SkeletonRenderer>() will be called as a fallback.
		/// </param>
		public SpineAttachment (bool currentSkinOnly = true, bool returnAttachmentPath = false, bool placeholdersOnly = false, string slotField = "", string dataField = "", string skinField = "", bool includeNone = true, bool fallbackToTextField = false) {
			this.currentSkinOnly = currentSkinOnly;
			this.returnAttachmentPath = returnAttachmentPath;
			this.placeholdersOnly = placeholdersOnly;
			this.slotField = slotField;
			this.dataField = dataField;
			this.skinField = skinField;
			this.includeNone = includeNone;
			this.fallbackToTextField = fallbackToTextField;
		}

		public static SpineAttachment.Hierarchy GetHierarchy (string fullPath) {
			return new SpineAttachment.Hierarchy(fullPath);
		}

		public static Spine.Attachment GetAttachment (string attachmentPath, Spine.SkeletonData skeletonData) {
			var hierarchy = SpineAttachment.GetHierarchy(attachmentPath);
			if (string.IsNullOrEmpty(hierarchy.name)) return null;

			SlotData slot = skeletonData.FindSlot(hierarchy.slot);
			if (slot == null) return null;
			return skeletonData.FindSkin(hierarchy.skin).GetAttachment(slot.Index, hierarchy.name);
		}

		public static Spine.Attachment GetAttachment (string attachmentPath, SkeletonDataAsset skeletonDataAsset) {
			return GetAttachment(attachmentPath, skeletonDataAsset.GetSkeletonData(true));
		}

		/// <summary>
		/// A struct that represents 3 strings that help identify and locate an attachment in a skeleton.</summary>
		public struct Hierarchy {
			public string skin;
			public string slot;
			public string name;

			public Hierarchy (string fullPath) {
				string[] chunks = fullPath.Split(new char[] { '/' }, System.StringSplitOptions.RemoveEmptyEntries);
				if (chunks.Length == 0) {
					skin = "";
					slot = "";
					name = "";
					return;
				} else if (chunks.Length < 2) {
					throw new System.Exception("Cannot generate Attachment Hierarchy from string! Not enough components! [" + fullPath + "]");
				}
				skin = chunks[0];
				slot = chunks[1];
				name = "";
				for (int i = 2; i < chunks.Length; i++) {
					name += chunks[i];
				}
			}
		}
	}

	public class SpineAtlasRegion : PropertyAttribute {
		public string atlasAssetField;

		public SpineAtlasRegion (string atlasAssetField = "") {
			this.atlasAssetField = atlasAssetField;
		}
	}

}
