local World = require("game.world")
local Palette = require("rendering.palette")
local Fonts = require("rendering.fonts")

local HUD = {}

function HUD.draw(altitude, hspeed, vspeed)
    local p = Palette.get()
    local sw, sh = World.screenW, World.screenH
    local pad = 12

    love.graphics.setFont(Fonts.small)

    -- Left column: SCORE, TIME, FUEL
    love.graphics.setColor(p.hud)
    love.graphics.print("SCORE  " .. string.format("%d", World.score), pad, pad)
    love.graphics.print("TIME   " .. string.format("%.0f", World.time), pad, pad + Fonts.small:getHeight() + 4)

    -- Fuel bar
    local fuelY = pad + (Fonts.small:getHeight() + 4) * 2
    local fuelMax = 750
    local fuelFrac = math.max(0, World.fuel / fuelMax)
    local barW = sw * 0.15
    local barH = Fonts.small:getHeight() * 0.7

    love.graphics.print("FUEL", pad, fuelY)
    local barX = pad + Fonts.small:getWidth("FUEL") + 8

    love.graphics.setColor(p.dim)
    love.graphics.rectangle("line", barX, fuelY + 2, barW, barH)

    if World.fuel < 150 and math.floor(love.timer.getTime() * 4) % 2 == 0 then
        love.graphics.setColor(p.warning)
    else
        love.graphics.setColor(p.pad)
    end
    love.graphics.rectangle("fill", barX + 1, fuelY + 3, (barW - 2) * fuelFrac, barH - 2)

    love.graphics.setColor(p.hud)
    love.graphics.print(string.format("%.0f", World.fuel), barX + barW + 8, fuelY)

    -- Right column: ALTITUDE, HORIZONTAL SPEED, VERTICAL SPEED
    local rx = sw - pad
    local function rightPrint(text, y)
        local w = Fonts.small:getWidth(text)
        love.graphics.print(text, rx - w, y)
    end

    love.graphics.setColor(p.hud)
    rightPrint(string.format("ALTITUDE  %.0f", altitude), pad)

    local hdir = hspeed > 0.5 and " >" or (hspeed < -0.5 and "< " or "  ")
    rightPrint(string.format("HORIZ SPEED %s%.1f", hdir, math.abs(hspeed)), pad + Fonts.small:getHeight() + 4)

    local vdir = vspeed > 0.5 and " v" or (vspeed < -0.5 and " ^" or "  ")
    rightPrint(string.format("VERT SPEED %s%.1f", vdir, math.abs(vspeed)), pad + (Fonts.small:getHeight() + 4) * 2)
end

return HUD