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using System;
using System.Collections.Generic;
using Microsoft.Xna.Framework.Content;
using StardewModdingAPI.Framework.Exceptions;
using StardewValley;
namespace StardewModdingAPI.Framework.ContentManagers
{
/// <summary>A content manager which handles reading files.</summary>
internal interface IContentManager : IDisposable
{
/*********
** Accessors
*********/
/// <summary>A name for the mod manager. Not guaranteed to be unique.</summary>
string Name { get; }
/// <summary>The current language as a constant.</summary>
LocalizedContentManager.LanguageCode Language { get; }
/// <summary>The absolute path to the <see cref="ContentManager.RootDirectory"/>.</summary>
string FullRootDirectory { get; }
/// <summary>Whether this content manager can be targeted by managed asset keys (e.g. to load assets from a mod folder).</summary>
bool IsNamespaced { get; }
/*********
** Methods
*********/
/// <summary>Get whether an asset exists and can be loaded.</summary>
/// <typeparam name="T">The expected asset type.</typeparam>
/// <param name="assetName">The normalized asset name.</param>
bool DoesAssetExist<T>(IAssetName assetName)
where T: notnull;
/// <summary>Load an asset through the content pipeline, using a localized variant of the <paramref name="assetName"/> if available.</summary>
/// <typeparam name="T">The type of asset to load.</typeparam>
/// <param name="assetName">The asset name relative to the loader root directory.</param>
/// <param name="language">The language for which to load the asset.</param>
/// <param name="useCache">Whether to read/write the loaded asset to the asset cache.</param>
T LoadLocalized<T>(IAssetName assetName, LocalizedContentManager.LanguageCode language, bool useCache)
where T : notnull;
/// <summary>Load an asset through the content pipeline, using the exact asset name without checking for localized variants.</summary>
/// <typeparam name="T">The type of asset to load.</typeparam>
/// <param name="assetName">The asset name relative to the loader root directory.</param>
/// <param name="useCache">Whether to read/write the loaded asset to the asset cache.</param>
T LoadExact<T>(IAssetName assetName, bool useCache)
where T : notnull;
/// <summary>Assert that the given key has a valid format and return a normalized form consistent with the underlying cache.</summary>
/// <param name="assetName">The asset key to check.</param>
/// <exception cref="SContentLoadException">The asset key is empty or contains invalid characters.</exception>
string AssertAndNormalizeAssetName(string? assetName);
/// <summary>Get the current content locale.</summary>
string GetLocale();
/// <summary>The locale for a language.</summary>
/// <param name="language">The language.</param>
string GetLocale(LocalizedContentManager.LanguageCode language);
/// <summary>Get whether the content manager has already loaded and cached the given asset.</summary>
/// <param name="assetName">The asset path relative to the loader root directory, not including the <c>.xnb</c> extension.</param>
bool IsLoaded(IAssetName assetName);
/// <summary>Purge matched assets from the cache.</summary>
/// <param name="predicate">Matches the asset keys to invalidate.</param>
/// <param name="dispose">Whether to dispose invalidated assets. This should only be <c>true</c> when they're being invalidated as part of a dispose, to avoid crashing the game.</param>
/// <returns>Returns the invalidated asset names and instances.</returns>
IDictionary<string, object> InvalidateCache(Func<string, Type, bool> predicate, bool dispose = false);
}
}
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