--@name hud lib
--@client
--@owneronly

enableHud(nil,true)

function createWindow(name, x, y, w, h)
    return {
        name = name,
        x = x,
        y = y,
        w = w,
        h = h,
        draw = false,
        child = {},
        dragging = false,
        dragOffset = {0, 0}
    }
end

local curx, cury = input.getCursorPos()
local cursorpos = {curx, cury}
local mousedown = false
local lastmousedown = false

timer.create("cursor", 0.01, 0, function()
    curx, cury = input.getCursorPos()
    cursorpos = {curx, cury}
    mousedown = input.isMouseDown(MOUSE.MOUSE1)
end)

local function isCursorOver(x, y, w, h)
    return cursorpos[1] > x and cursorpos[1] < x + w and cursorpos[2] > y and cursorpos[2] < y + h
end

function toggleWindow(window)
    window.draw = not window.draw
    input.enableCursor(window.draw)
end

function addChild(window, child)
    table.insert(window.child, child)
end

function createLabel(text, x, y)
    return { type = "label", text = text, x = x, y = y }
end

function createButton(text, x, y, w, h, onclick)
    return { type = "button", text = text, x = x, y = y, w = w, h = h, onclick = onclick }
end

function createEntry(x, y, w, h, text)
    return { type = "entry", x = x, y = y, w = w, h = h, text = text or "", active = false }
end

function createCheckbox(x, y, checked)
    return { type = "checkbox", x = x, y = y, checked = checked or false }
end

function createSlider(x, y, w, min, max, value)
    return { type = "slider", x = x, y = y, w = w, min = min, max = max, value = value or min }
end

function createDropdown(x, y, w, options, selected)
    return { type = "dropdown", x = x, y = y, w = w, options = options, selected = selected or 1, expanded = false }
end

hook.add("inputPressed", "entryInput", function(key)
    for _, window in pairs(windows or {}) do
        for _, child in ipairs(window.child) do
            if child.type == "entry" and child.active then
                if key == KEY.BACKSPACE then
                    child.text = child.text:sub(1, -2)
                elseif key >= 32 and key <= 126 then
                    child.text = child.text .. string.char(key)
                end
            end
        end
    end
end)

function drawWindow(window)
    if not window.draw then return end
    
    render.setColor(Color(80, 80, 80)) 
    render.drawRect(window.x, window.y, window.w, window.h)

    for _, child in ipairs(window.child) do
        if child.type == "label" then
            render.drawSimpleText(window.x + child.x, window.y + child.y, child.text, 0, 1)
        elseif child.type == "button" then
            local hovered = isCursorOver(window.x + child.x, window.y + child.y, child.w, child.h)
            local color = hovered and Color(0, 180, 220) or Color(0, 150, 200)
            render.setColor(color)
            render.drawRect(window.x + child.x, window.y + child.y, child.w, child.h)
            render.setColor(Color(255, 255, 255))
            render.drawSimpleText(window.x + child.x + child.w / 2, window.y + child.y + child.h / 2, child.text, 1, 1)
            if hovered and mousedown and not lastmousedown then child.onclick() end
        elseif child.type == "checkbox" then
            render.setColor(child.checked and Color(0, 255, 0) or Color(255, 0, 0))
            render.drawRect(window.x + child.x, window.y + child.y, 15, 15)
            if isCursorOver(window.x + child.x, window.y + child.y, 15, 15) and mousedown and not lastmousedown then
                child.checked = not child.checked
            end
        elseif child.type == "slider" then
            render.setColor(Color(150, 150, 150))
            render.drawRect(window.x + child.x, window.y + child.y, child.w, 5)
            local sliderPos = child.x + ((child.value - child.min) / (child.max - child.min)) * child.w
            render.setColor(Color(255, 255, 255))
            render.drawRect(window.x + sliderPos - 5, window.y + child.y - 5, 10, 15)
            if isCursorOver(window.x + sliderPos - 5, window.y + child.y - 5, 10, 15) and mousedown then
                child.value = math.clamp(((cursorpos[1] - window.x - child.x) / child.w) * (child.max - child.min) + child.min, child.min, child.max)
            end
        elseif child.type == "dropdown" then
            render.setColor(Color(200, 200, 200))
            render.drawRect(window.x + child.x, window.y + child.y, child.w, 20)
            render.setColor(Color(0, 0, 0))
            render.drawSimpleText(window.x + child.x + 5, window.y + child.y + 5, child.options[child.selected], 0, 1)
            if isCursorOver(window.x + child.x, window.y + child.y, child.w, 20) and mousedown and not lastmousedown then
                child.expanded = not child.expanded
            end
            if child.expanded then
                for i, option in ipairs(child.options) do
                    render.setColor(Color(180, 180, 180))
                    render.drawRect(window.x + child.x, window.y + child.y + 20 * i, child.w, 20)
                    render.setColor(Color(0, 0, 0))
                    render.drawSimpleText(window.x + child.x + 5, window.y + child.y + 5 + 20 * i, option, 0, 1)
                    if isCursorOver(window.x + child.x, window.y + child.y + 20 * i, child.w, 20) and mousedown then
                        child.selected = i
                        child.expanded = false
                    end
                end
            end
        end
    end
    lastmousedown = mousedown
end