local _, F = ...

F.Utils = {}

function F.Utils.Round(num, decimals)
    local mult = 10^(decimals or 0)
    return math.floor(num * mult + 0.5) / mult
end

-- Format large numbers into readable strings (commas or K/M suffixes)
function F.Utils.FormatLargeNumber(n)
    n = tonumber(n) or 0

    if n >= 1000000 then
        return F.Utils.Round(n / 1000000, 1) .. "M"
    elseif n >= 1000 then
        -- Insert thousands separators (commas)
        local s = tostring(math.floor(n))
        local k
        repeat
            s, k = s:gsub("^(-?%d+)(%d%d%d)", "%1,%2")
        until k == 0
        return s
    else
        return tostring(n)
    end
end

FormatLargeNumber = function(n) return F.Utils.FormatLargeNumber(n) end

function F.Utils.FormatTime(time, formatString)
    if time <= 59 then return "< 1m" end

    local d = math.floor(time / 86400)
    local h = math.floor((time % 86400) / 3600)
    local m = math.floor((time % 3600) / 60)
    local s = time % 60

    local t = formatString or "%dd %hh %mm"

    local pad = function(v) return v < 10 and "0" .. v or v end

    local subs = {
        ["%%D([Dd]?)"] = d > 0 and (pad(d) .. "%1") or "",
        ["%%d([Dd]?)"] = d > 0 and (d .. "%1") or "",
        ["%%H([Hh]?)"] = (d > 0 or h > 0) and (pad(h) .. "%1") or "",
        ["%%h([Hh]?)"] = (d > 0 or h > 0) and (h .. "%1") or "",
        ["%%M([Mm]?)"] = pad(m) .. "%1",
        ["%%m([Mm]?)"] = m .. "%1",
    }

    for k,v in pairs(subs) do
        t = t:gsub(k, v)
    end

    return strtrim(t:gsub("^%s*0*", ""):gsub("^%s*[DdHhMm]", ""), " :/-|")
end