import pluginInterfaces as pi

from yapsy.PluginManager import PluginManagerSingleton

class Help(pi.IInterfacePlugin):
    """
    The help plugin print the usage informations of prismedia’s plugins.
    Use it by simply caling `prismedia help <plugin_name>`.
    For example `prismedia help help` bring this help.
    """

    def prepareOptions(self, video, options):
        pluginManager = PluginManagerSingleton.get()

        if options["<parameters>"]:
            parameters = options["<parameters>"]
        else:
            parameters = ["help"]

        for p in parameters:
            plugin = pluginManager.getPluginByName(p, pi.PluginTypes.ALL)
            if plugin is None:
                # TODO: log instead to warning ? error ?
                print("No plugin was found with name:", p)
                continue

            print(plugin.name + "\t" + plugin.description)
            print("Usage:", plugin.plugin_object.__doc__)

            if p == "help":
                print("The plugins are stored in the following folders:", pluginManager.getPluginLocator().plugins_places)

                print("Category:", pi.PluginTypes.INTERFACE.value)
                for plugin in pluginManager.getPluginsOfCategory(pi.PluginTypes.INTERFACE):
                    print("\t" + plugin.name)

                print("Category:", pi.PluginTypes.PLATFORM.value)
                for plugin in pluginManager.getPluginsOfCategory(pi.PluginTypes.PLATFORM):
                    print("\t" + plugin.name)

                print("Category:", pi.PluginTypes.CONSUMER.value)
                for plugin in pluginManager.getPluginsOfCategory(pi.PluginTypes.CONSUMER):
                    print("\t" + plugin.name)

            # Print a line breack between each plugin help.
            print()

        return False