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Console_Functions = {};
Console_CurrentFunction = null;
Console_DefaultPrompt = "\033[29;1m[atomic] \033[0m";
Console_LastClientId = null;

function Console_GetFunctionNames()
{
    return get_keys(Console_Functions);
}

// C++ callable functions

function Console_AutocompleteRequest(client_id, arg_index, commandline)
{
    Console_LastClientId = client_id;
    
    var result = [];
    var parts = [];
    var name = "Console_Shell";
    
    if (commandline.length > 0 && arg_index != 0)
    {
        parts = commandline.split(" ");
        name = parts.shift();
        arg_index--;
    }

    if (Console_Functions[name] && Console_Functions[name]["autocomplete"])
    {
        //Log("calling autocomplete_callback: " + name + "\n");
        result = Console_Functions[name]["autocomplete"](arg_index, parts);
    }
    
    var result_string = result.join("\n");
    
    ConsoleExport_AutoCompleteResponse(Console_LastClientId, result_string);
    return true;
}

function Console_PromptResponse(client_id, response)
{
    Console_LastClientId = client_id;
    
    var parts = response.split(" ");

    var current_function = Console_CurrentFunction;
    Console_CurrentFunction = Console_Shell;
    
    var result = current_function.apply(null, Array.prototype.slice.call(parts, 0));
    
    if (Console_CurrentFunction == Console_Shell)
    {
        Console_SetDefaultPrompt();
    }
    
    return result;
}

function Console_NewConnection(client_id)
{
    Console_LastClientId = client_id;
    
    return Console_SetDefaultPrompt();
}

// User script functions

function Console_PreventDefaultPrompt()
{
    Console_CurrentFunction = null;
}

function Console_SetDefaultPrompt()
{
    return Console_PromptRequest(Console_DefaultPrompt, Console_Shell);
}

function Console_PromptRequest(prompt, callback)
{
    Console_CurrentFunction = callback;
    return ConsoleExport_PromptRequest(Console_LastClientId, prompt);
}

function Console_RegisterCommand(command, autocomplete_callback)
{
    var command_string = command.toString();

    var pos_end = command_string.indexOf("\n") - 1;
    var pos_start = command_string.indexOf(" ") + 1;
    
    var full_name = command_string.substr(pos_start, pos_end - pos_start);
    
    var pos_split = full_name.indexOf("(");
    
    var name = full_name.substr(0, pos_split);
    
    var argument_string = full_name.substr(pos_split + 1);
    
    if (argument_string.length > 0)
    {
        argument_string = argument_string.replace(/,/g, "");
        argument_string = "<" + argument_string.replace(/ /g, "> <") + ">";
    }
    
    Console_Functions[name] = { "command" : command, "autocomplete" : autocomplete_callback, "help" : argument_string };
    return true;
}

function Console_StandardAutocomplete()
{
    var arg_index = arguments[0];
    var args = arguments[1];
    
    if (0 <= arg_index && arg_index < arguments.length - 2)
    {
        return arguments[arg_index + 2];
    }
    
    return [];
}

// Default call function

function Console_Shell()
{
    var args = to_array(arguments);
    var name = args.shift();
    
    if (Console_Functions[name] && Console_Functions[name]["command"])
    {
        return Console_Functions[name]["command"].apply(null, Array.prototype.slice.call(args, 0));
    }
    
    return false;
}
Console_RegisterCommand(Console_Shell, function(arg_index, args) { return Console_StandardAutocomplete(arg_index, args, Console_GetFunctionNames()); });

// Help functions

function help_complete(arg_index, args)
{
    var result = [];
    
    if (arg_index == 1) // command name
    {
        for (var name in Console_Functions)
        {
            result.push(name);
        }
    }
    
    return result;
}

function help(command_name)
{
    if (!command_name)
    {
        command_name = "help";
    }
    
    if (Console_Functions[command_name] && Console_Functions[command_name]["help"])
    {
        var result = "";
        
        if (Console_Functions[command_name] && Console_Functions[command_name]["autocomplete"])
        {
            result += "Argument autocompletion enabled for " + command_name + "\n";
        }
        
        result += "Syntax: " + command_name + " " + Console_Functions[command_name]["help"] + "\n";
        
        Log(result);
        return true;
    }
    
    Log("\033[31mNo help for " + command_name + " found.\033[0m\n");
    return false;
}
Console_RegisterCommand(help, function(arg_index, args) { return Console_StandardAutocomplete(arg_index, args, Console_GetFunctionNames()); });