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using System;
using System.Collections.Generic;
using System.Linq;
using StardewModdingAPI.Framework;
using StardewValley;

namespace StardewModdingAPI.Events
{
    /// <summary>Events raised when the player data changes.</summary>
    public static class PlayerEvents
    {
        /*********
        ** Events
        *********/
        /// <summary>Raised after the player's inventory changes in any way (added or removed item, sorted, etc).</summary>
        public static event EventHandler<EventArgsInventoryChanged> InventoryChanged;

        /// <summary> Raised after the player levels up a skill. This happens as soon as they level up, not when the game notifies the player after their character goes to bed.</summary>
        public static event EventHandler<EventArgsLevelUp> LeveledUp;


        /*********
        ** Internal methods
        *********/
        /// <summary>Raise an <see cref="InventoryChanged"/> event.</summary>
        /// <param name="monitor">Encapsulates monitoring and logging.</param>
        /// <param name="inventory">The player's inventory.</param>
        /// <param name="changedItems">The inventory changes.</param>
        internal static void InvokeInventoryChanged(IMonitor monitor, List<Item> inventory, IEnumerable<ItemStackChange> changedItems)
        {
            monitor.SafelyRaiseGenericEvent($"{nameof(PlayerEvents)}.{nameof(PlayerEvents.InventoryChanged)}", PlayerEvents.InventoryChanged?.GetInvocationList(), null, new EventArgsInventoryChanged(inventory, changedItems.ToList()));
        }

        /// <summary>Rase a <see cref="LeveledUp"/> event.</summary>
        /// <param name="monitor">Encapsulates monitoring and logging.</param>
        /// <param name="type">The player skill that leveled up.</param>
        /// <param name="newLevel">The new skill level.</param>
        internal static void InvokeLeveledUp(IMonitor monitor, EventArgsLevelUp.LevelType type, int newLevel)
        {
            monitor.SafelyRaiseGenericEvent($"{nameof(PlayerEvents)}.{nameof(PlayerEvents.LeveledUp)}", PlayerEvents.LeveledUp?.GetInvocationList(), null, new EventArgsLevelUp(type, newLevel));
        }
    }
}