local screen = {guiGetScreenSize()} local x, y = (screen[1]/1366), (screen[2]/768) local selectBox = 0 local edits = {} local selectBox = false local indexPag = 0 local maxLinhas = 4 local select = 1 garagem = {} local font = dxCreateFont('fil

Your code appears to be a script written for Multi Theft Auto: San Andreas (MTA:SA), which utilizes the Lua programming language. This script handles interfaces for vehicle dealership and garage management, along with events for user interaction.

Given the extensive code you've posted, let's focus on the potential issues and clean up some parts for better readability and functionality.

### Possible Improvements & Corrections

1. **Repetition of Variables**: You have `local selectBox = 0` and `local selectBox = false`. Remove one, as having two definitions for `selectBox` may cause confusion.

2. **Function Naming Consistency**: Ensure that all your function names are consistently defined and adhere to a clear naming convention. For instance, the `dxDraw` function could be renamed to something like `drawInterface` for clarity.

3. **Descriptive Comments**: Add comments to complex or critical parts of the code to ensure that others (or future you) will understand the purpose and functionality behind certain sections.

4. **Simplification of Checks**: You have a lot of nested if-statements. Consider refactoring those into separate functions or simplifying them with early returns to reduce the complexity.

5. **Event Binding Checks**: You can create a utility function to check whether an event handler exists. It seems you're already using an `isEventHandlerAdded` function. Ensure all event bindings are properly managed.

6. **Unused Variables or Functions**: Ensure there are no unused variables or redundant functionalities in your code. For example, you could check if all declared fonts are actually being used.

7. **Security Improvements**: Consider adding error handling for server events, especially when capturing and processing user inputs to avoid potential exploits.

8. **Formatting**: Consistently format lines to improve readability. For example, ensure consistent spacing around operators and after commas.

### Example Fixes

Here’s an example of some cleaned-up logic. I'll just show a small part of the `clickFunctions` for brevity:

```lua
function clickFunctions(button, state)
    if (button == 'left' and state == 'down') then 
        if isEventHandlerAdded('onClientRender', root, drawInterface) then 
            if loja then 
                local isMouseOverTestDrive = isMouseInPosition(x * 1200, y * 705, x * 40, y * 40)
                if isMouseOverTestDrive then 
                    local color = {getVehicleColor(car, true)}
                    triggerServerEvent('Schootz.TesteDrive', localPlayer, config['Veiculos'][select][2], color)
                end
            end

            --... other nested checks

            if garagemdx then 
                handleGarageInteractions()
            end
        end
    end 
end

function handleGarageInteractions()
    local linha = 0
    for i, v in ipairs(config['Veiculos']) do 
        if (i > indexPag and linha < maxLinhas) then
            linha = linha + 1
            -- Check for mouse interactions and act accordingly
        end
    end

    -- Check for buttons like "Retirar veículo", "Guardar veículo", etc.
end
```

### Conclusion
The original code is quite substantial but seems functional for a game mod as complex as MTA:SA. Properly refactoring, improving readability, and ensuring maintainability will enhance your script and help prevent bugs in the future. Always remember to test each change thoroughly in a controlled environment before deploying, especially for scripts that interact with servers or handle user input.