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using System;
using OpenMetaverse;
using OpenMetaverse.Assets;
using OpenSim.Framework;
using OpenSim.Region.Framework.Scenes;
using OpenSim.Services.Interfaces;

namespace OpenSim.Tests.Common
{
    /// <summary>
    /// Utility functions for carrying out task inventory tests.
    /// </summary>
    ///
    public static class TaskInventoryHelpers
    {
        /// <summary>
        /// Add a notecard item to the given part.
        /// </summary>
        /// <param name="scene"></param>
        /// <param name="part"></param>
        /// <param name="itemName"></param>
        /// <param name="itemIDFrag">UUID or UUID stem</param>
        /// <param name="assetIDFrag">UUID or UUID stem</param>
        /// <param name="text">The tex to put in the notecard.</param>
        /// <returns>The item that was added</returns>
        public static TaskInventoryItem AddNotecard(
            Scene scene, SceneObjectPart part, string itemName, string itemIDStem, string assetIDStem, string text)
        {
            return AddNotecard(
                scene, part, itemName, TestHelpers.ParseStem(itemIDStem), TestHelpers.ParseStem(assetIDStem), text);
        }

        /// <summary>
        /// Add a notecard item to the given part.
        /// </summary>
        /// <param name="scene"></param>
        /// <param name="part"></param>
        /// <param name="itemName"></param>
        /// <param name="itemID"></param>
        /// <param name="assetID"></param>
        /// <param name="text">The tex to put in the notecard.</param>
        /// <returns>The item that was added</returns>
        public static TaskInventoryItem AddNotecard(
            Scene scene, SceneObjectPart part, string itemName, UUID itemID, UUID assetID, string text)
        {
            AssetNotecard nc = new AssetNotecard();
            nc.BodyText = text;
            nc.Encode();

            AssetBase ncAsset
                = AssetHelpers.CreateAsset(assetID, AssetType.Notecard, nc.AssetData, UUID.Zero);
            scene.AssetService.Store(ncAsset);

            TaskInventoryItem ncItem 
                = new TaskInventoryItem 
                    { Name = itemName, AssetID = assetID, ItemID = itemID,
                      Type = (int)AssetType.Notecard, InvType = (int)InventoryType.Notecard };
            part.Inventory.AddInventoryItem(ncItem, true); 
            
            return ncItem;
        }

        /// <summary>
        /// Add a simple script to the given part.
        /// </summary>
        /// <remarks>
        /// TODO: Accept input for item and asset IDs to avoid mysterious script failures that try to use any of these
        /// functions more than once in a test.
        /// </remarks>
        /// <param name="scene"></param>
        /// <param name="part"></param>
        /// <returns>The item that was added</returns>
        public static TaskInventoryItem AddScript(Scene scene, SceneObjectPart part)
        {
            return AddScript(scene, part, "scriptItem", "default { state_entry() { llSay(0, \"Hello World\"); } }");
        }

        /// <summary>
        /// Add a simple script to the given part.
        /// </summary>
        /// <remarks>
        /// TODO: Accept input for item and asset IDs so that we have completely replicatable regression tests rather
        /// than a random component.
        /// </remarks>
        /// <param name="scene"></param>
        /// <param name="part"></param>
        /// <param name="scriptName">Name of the script to add</param>
        /// <param name="scriptSource">LSL script source</param>
        /// <returns>The item that was added</returns>
        public static TaskInventoryItem AddScript(
            Scene scene, SceneObjectPart part, string scriptName, string scriptSource)
        {
            AssetScriptText ast = new AssetScriptText();
            ast.Source = scriptSource;
            ast.Encode();

            UUID assetUuid = UUID.Random();
            UUID itemUuid = UUID.Random();

            AssetBase asset
                = AssetHelpers.CreateAsset(assetUuid, AssetType.LSLText, ast.AssetData, UUID.Zero);
            scene.AssetService.Store(asset);
            TaskInventoryItem item
                = new TaskInventoryItem 
                    { Name = scriptName, AssetID = assetUuid, ItemID = itemUuid,
                      Type = (int)AssetType.LSLText, InvType = (int)InventoryType.LSL };
            part.Inventory.AddInventoryItem(item, true);
            
            return item;
        }

        /// <summary>
        /// Add a scene object item to the given part.
        /// </summary>
        /// <remarks>
        /// TODO: Accept input for item and asset IDs to avoid mysterious script failures that try to use any of these
        /// functions more than once in a test.
        /// </remarks>
        ///
        /// <param name="scene"></param>
        /// <param name="sop"></param>
        /// <param name="itemName"></param>
        /// <param name="id"></param>
        /// <param name="userId"></param>
        public static TaskInventoryItem AddSceneObject(
            Scene scene, SceneObjectPart sop, string itemName, UUID id, UUID userId)
        {
            SceneObjectGroup taskSceneObject = SceneHelpers.CreateSceneObject(1, UUID.Zero);
            AssetBase taskSceneObjectAsset = AssetHelpers.CreateAsset(0x10, taskSceneObject);
            scene.AssetService.Store(taskSceneObjectAsset);
            TaskInventoryItem taskSceneObjectItem
                = new TaskInventoryItem
                    { Name = itemName,
                      AssetID = taskSceneObjectAsset.FullID,
                      ItemID = id,
                      OwnerID = userId,
                      Type = (int)AssetType.Object,
                      InvType = (int)InventoryType.Object };
            sop.Inventory.AddInventoryItem(taskSceneObjectItem, true);

            return taskSceneObjectItem;
        }
    }
}