-- Colorize a string in the given color
--
-- Colorizes a string in a given hexadecimal color coded color. The string will
-- be returned including a reset color escape (assumably white text color)
local colorize = function (color, string)
    local c = minetest.get_color_escape_sequence('#'..string.upper(color))
    local r = minetest.get_color_escape_sequence('#FFFFFF')
    return c..string..r
end


-- Show the configuration to the player
--
-- Gathers all settable variables and prints them to the player
--
-- @param player The player object of the player to print to
local show_configuration = function (player)
    local name = player:get_player_name()
    local result_string = colorize('729fcf', 'MTimer configuration')..'\n'
    local font_color = player:get_attribute('mtimer:font_color')

    local configuration = {
        runtime = player:get_attribute('mtimer:runtime'),
        offset = player:get_attribute('mtimer:offset'),
        ingame_time = player:get_attribute('mtimer:ingame_time'),
        current_time = player:get_attribute('mtimer:current_time'),
        font_color = colorize(font_color, font_color),
        start = player:get_attribute('mtimer:start'),
        show = player:get_attribute('mtimer:show'),
        locale = player:get_attribute('mtimer:locale'),
        position = player:get_attribute('mtimer:position'),
        format = player:get_attribute('mtimer:format'),
        alignment = player:get_attribute('mtimer:alignment')
    }

    for setting,value in pairs(configuration) do
        local s = colorize('73d216', setting)
        result_string = result_string..'  '..s..' = '..value..'\n'
    end

    minetest.chat_send_player(name, result_string)
end


-- Register the chat command that will be used to interact with MTimer.
--
-- The chat command has three actions:
--
-- help   Show help to the user via the regular chat
-- show   Show the current configuration to the user
-- set    Set the given setting to the given value
minetest.register_chatcommand('mtimer', {
    params = '<help>, <show>, <set setting value>',
    description = 'Manage MTimer display',
    func = function(name, parameters)
        local player = minetest.get_player_by_name(name)
        local action = parameters:match('%a+')
        local payload = parameters:gsub('^%a+ ', '')
        if action == 'show' then show_configuration(player) end
        if action == 'help' then show_help(player) end
        if action == 'set' and payload ~= nil then set(player, payload) end
    end
})