#ifndef _INCLUDE_SOURCEMOD_PLUGINMNGR_INTERFACE_H_
#define _INCLUDE_SOURCEMOD_PLUGINMNGR_INTERFACE_H_

#include <IShareSys.h>
#include <sp_vm_context.h>

#define SMINTERFACE_PLUGINMANAGER_NAME		"IPluginManager"
#define SMINTERFACE_PLUGINMANAGER_VERSION	1

namespace SourceMod
{
	/** 
	 * @brief Encapsulates plugin public information.
	 */
	typedef struct sm_plugininfo_s
	{
		const char *name;
		const char *author;
		const char *description;
		const char *version;
		const char *url;
	} sm_plugininfo_t;

	/**
	 * @brief Describes the usability status of a plugin.
	 */
	enum PluginStatus
	{
		Plugin_Running=0,		/* Plugin is running */
		Plugin_Paused,			/* Plugin is paused */
		Plugin_Stopped,			/* Plugin is paused for map changes, too */
		Plugin_Error,			/* Plugin has a blocking error */
		Plugin_BadLoad,			/* Plugin failed to load */
	};

	/**
	 * @brief Describes the object lifetime of a plugin.
	 */
	enum PluginLifetime
	{
		PluginLifetime_Forever,			/* Plugin will never be unloaded */
		PluginLifetime_Map				/* Plugin will be unloaded at mapchange */
	};


	/**
	 * @brief Encapsulates a run-time plugin as maintained by SourceMod.
	 */
	class IPlugin : public IUnloadableParent
	{
	public:
		UnloadableParentType GetParentType()
		{
			return ParentType_Module;
		}
	public:
		/**
		 * @brief Returns the lifetime of a plugin.
		 */
		virtual PluginLifetime GetLifetime() =0;

		/**
		 * @brief Returns the current API context being used in the plugin.
		 *
		 * @return	Pointer to an IPluginContext, or NULL if not loaded.
		 */
		virtual SourcePawn::IPluginContext *GetBaseContext() =0;

		/**
		 * @brief Returns the context structure being used in the plugin.
		 *
		 * @brief	Pointer to an sp_context_t, or NULL if not loaded.
		 */
		virtual sp_context_t *GetContext() =0;

		/**
		 * @brief Returns information about the plugin.
		 *
		 * @brief	Pointer to an sm_plugininfo_t, or NULL if not loaded.
		 */
		virtual sm_plugininfo_t *GetPublicInfo() =0;

		/**
		 * @brief Returns the plugin filename (relative to plugins dir).
		 */
		virtual const char *GetFilename() =0;

		/**
		 * @brief Returns true if a plugin is in debug mode, false otherwise.
		 */
		virtual bool IsDebugging() =0;

		/**
		 * @brief Returns the plugin status.
		 */
		virtual PluginStatus GetStatus() =0;
		
		/**
		 * @brief Sets whether the plugin is paused or not.
		 *
		 * @return			True on successful pause, false otherwise.
		 */
		virtual bool SetPauseState(bool paused) =0;

		/**
		 * @brief Locks or unlocks the plugin from being updated on mapchange.
		 */
		virtual void SetLockForUpdates(bool lock_status) =0;

		/**
		 * @brief Returns whether the plugin is locked from being updated on mapchange.
		 */
		virtual bool GetLockForUpdates() =0;

		/**
		 * @brief Returns the unique serial number of a plugin.
		 */
		virtual unsigned int GetSerial() =0;
	};


	/**
	 * @brief Iterates over a list of plugins.
	 */
	class IPluginIterator
	{
	public:
		virtual void ~IPluginIterator()
		{
		};
	public:
		/**
		 * @brief Returns true if there are more plugins in the iterator.
		 */
		virtual bool MorePlugins() =0;

		/**
		 * @brief Returns the plugin at the current iterator position.
		 */
		virtual IPlugin *GetPlugin() =0;

		/**
		 * @brief Advances to the next plugin in the iterator.
		 */
		virtual void NextPlugin() =0;

		/**
		 * @brief Destroys the iterator object.
		 * Note: You may use 'delete' in lieu of this function.
		 */
		virtual void Release() =0;
	};


	/**
	 * @brief Manages the runtime loading and unloading of plugins.
	 */
	class IPluginManager : public SMInterface
	{
	public:
		virtual const char *GetInterfaceName()
		{
			return SMINTERFACE_PLUGINMANAGER_NAME;
		}

		virtual unsigned int GetInterfaceVersion()
		{
			return SMINTERFACE_PLUGINMANAGER_VERSION;
		}
	public:
		/**
		 * @brief Attempts to load a plugin.
		 *
		 * @param path		Path and filename of plugin, relative to plugins folder.
		 * @param debug		Whether or not to default the plugin into debug mode.
		 * @param lifetime	Lifetime of the plugin.
		 * @param error		Buffer to hold any error message.
		 * @param err_max	Maximum length of error message buffer.
		 * @return			A new plugin pointer on success, false otherwise.
		 */
		virtual IPlugin *LoadPlugin(const char *path, 
									bool debug,
									PluginLifetime lifetime,
									char error[],
									size_t err_max) =0;

		/**
		 * @brief Attempts to unload a plugin.
		 *
		 * @param			Pointer to the plugin handle.
		 * @return			True on success, false otherwise.
		 */
		virtual bool UnloadPlugin(IPlugin *plugin) =0;

		/**
		 * @brief Finds a plugin by its context.
		 * Note: This function should be considered O(1).
		 *
		 * @param			Pointer to an sp_context_t.
		 * @return			Pointer to a matching IPlugin, or NULL if none found.
		 */
		virtual IPlugin *FindPluginByContext(const sp_context_t *ctx) =0;

		/**
		 * @brief Returns the number of plugins (both failed and loaded).
		 *
		 * @return			The number of internally cached plugins.
		 */
		virtual unsigned int GetPluginCount() =0;

		/**
		 * @brief Returns a pointer that can be used to iterate through plugins.
		 * Note: This pointer must be freed using EITHER delete OR IPluginIterator::Release().
		 */
		virtual IPluginIterator *GetPluginIterator() =0;
	};
};

#endif //_INCLUDE_SOURCEMOD_PLUGINMNGR_INTERFACE_H_