#ifndef _M_UPDATER_H
#define _M_UPDATER_H

// if you set Update::szUpdateURL to the following value when registering, as well as setting your beta site and version data,
// updater will ignore szVersionURL and pbVersionPrefix, and attempt to find the file listing URL's from the backend XML data.
// for this to work, the plugin name in pluginInfo.shortName must match the file listing exactly (except for case)
#define UPDATER_AUTOREGISTER		"UpdaterAUTOREGISTER"

typedef struct Update_tag {
  int cbSize;     
  char *szComponentName;		// component name as it will appear in the UI (will be translated before displaying)

  char *szVersionURL;			// URL where the current version can be found (NULL to disable)
  BYTE *pbVersionPrefix;		// bytes occuring in VersionURL before the version, used to locate the version information within the URL data
								// (not that this URL could point at a binary file - dunno why, but it could :)
  int cpbVersionPrefix;			// number of bytes pionted to by pbVersionPrefix
  char *szUpdateURL;			// URL where dll/zip is located
								// set to UPDATER_AUTOREGISTER if you want updater to find the file listing URLs (ensure plugin shortName matches file listing!)

  char *szBetaVersionURL;		// URL where the beta version can be found (NULL to disable betas)
  BYTE *pbBetaVersionPrefix;	// bytes occuring in VersionURL before the version, used to locate the version information within the URL data
  int cpbBetaVersionPrefix;		// number of bytes pionted to by pbVersionPrefix
  char *szBetaUpdateURL;		// URL where dll/zip is located

  BYTE *pbVersion;				// bytes of current version, used for comparison with those in VersionURL
  int cpbVersion;				// number of bytes pionted to by pbVersion

  char *szBetaChangelogURL;		// url for displaying changelog for beta versions
} Update;

// register a comonent with the updater
//
// wparam = 0
// lparam = (LPARAM)&Update
#define MS_UPDATE_REGISTER      "Update/Register"

// utility functions to create a version string from a DWORD or from pluginInfo
// point buf at a buffer at least 16 chars wide - but note the version string returned may be shorter
//
__inline static char *CreateVersionString(DWORD version, char *buf) {
	mir_snprintf(buf, 16, "%d.%d.%d.%d", (version >> 24) & 0xFF, (version >> 16) & 0xFF, (version >> 8) & 0xFF, version & 0xFF);
	return buf;
}

__inline static char *CreateVersionStringPlugin(PLUGININFO *pluginInfo, char *buf) {
	return CreateVersionString(pluginInfo->version, buf);
}


// register the 'easy' way - use this method if you have no beta URL and the plugin is on the miranda file listing
// NOTE: the plugin 'short name' in pluginInfo must match the name of the plugin on the file listing, exactly (not including case)
// AND the plugin version string on the file listing must be the string version of the version in pluginInfo (i.e. 0.0.0.1,
// so no letters, brackets, etc.)
//
// wParam = (int)fileID				- this is the file ID from the file listing (i.e. the number at the end of the download link)
// lParam = (PLUGININFO*)&pluginInfo
#define MS_UPDATE_REGISTERFL	"Update/RegisterFL"

// this function can be used to 'unregister' components - useful for plugins that register non-plugin/langpack components and
// may need to change those components on the fly
// lParam = (char *)szComponentName
#define MS_UPDATE_UNREGISTER	"Update/Unregister"

// this event is fired when the startup process is complete, but NOT if a restart is imminent
// it is designed for status managment plugins to use as a trigger for beggining their own startup process
// wParam = lParam = 0 (unused)
// (added in version 0.1.6.0)
#define ME_UPDATE_STARTUPDONE	"Update/StartupDone"

// this service can be used to enable/disable Updater's global status control
// it can be called from the StartupDone event handler
// wParam = (BOOL)enable
// lParam = 0
// (added in version 0.1.6.0)
#define MS_UPDATE_ENABLESTATUSCONTROL	"Update/EnableStatusControl"

// An description of usage of the above service and event:
// Say you are a status control plugin that normally sets protocol or global statuses in your ModulesLoaded event handler.
// In order to make yourself 'updater compatible', you would move the status control code from ModulesLoaded to another function, 
// say DoStartup. Then, in ModulesLoaded you would check for the existence of the MS_UPDATE_ENABLESTATUSCONTROL service.
// If it does not exist, call DoStartup. If it does exist, hook the ME_UPDATE_STARTUPDONE event and call DoStartup from there. You may
// also wish to call MS_UPDATE_ENABLESTATUSCONTROL with wParam == FALSE at this time, to disable Updater's own status control feature.

// this service can be used to determine whether updates are possible for a component with the given name
// wParam = 0
// lParam = (char *)szComponentName
// returns TRUE if updates are supported, FALSE otherwise
#define MS_UPDATE_ISUPDATESUPPORTED		"Update/IsUpdateSupported"

#endif


/////////////// Usage Example ///////////////

#ifdef EXAMPLE_CODE

// you need to #include "m_updater.h" and HookEvent(ME_SYSTEM_MODULESLOADED, OnModulesLoaded) in your Load function...

int OnModulesLoaded(WPARAM wParam, LPARAM lParam) {

	Update update = {0}; // for c you'd use memset or ZeroMemory...
	char szVersion[16];

	update.cbSize = sizeof(Update);

	update.szComponentName = pluginInfo.shortName;
	update.pbVersion = (BYTE *)CreateVersionString(&pluginInfo, szVersion);
	update.cpbVersion = strlen((char *)update.pbVersion);

	// these are the three lines that matter - the archive, the page containing the version string, and the text (or data) 
	// before the version that we use to locate it on the page
	// (note that if the update URL and the version URL point to standard file listing entries, the backend xml
	// data will be used to check for updates rather than the actual web page - this is not true for beta urls)
	update.szUpdateURL = "http://scottellis.com.au:81/test/updater.zip";
	update.szVersionURL = "http://scottellis.com.au:81/test/updater_test.html";
	update.pbVersionPrefix = (BYTE *)"Updater version ";
	
	update.cpbVersionPrefix = strlen((char *)update.pbVersionPrefix);

	CallService(MS_UPDATE_REGISTER, 0, (WPARAM)&update);

	// Alternatively, to register a plugin with e.g. file ID 2254 on the file listing...
	// CallService(MS_UPDATE_REGISTERFL, (WPARAM)2254, (LPARAM)&pluginInfo);

	return 0;
}

#endif