-- Placement belongs to the engine. These are Maniax CVar's existing controls;
-- no native frame resizing, second collision solver, or automatic settings.
local Addon = _G.ManiaxNamePlates
local preset = {
  { "nameplateStacking", 2 },
  { "nameplateRaiseDistance", 3 },
  { "nameplatePullDistance", 0.1 },
}

function Addon:GetStackingStatus()
  local value = GetCVar("nameplateStacking")
  local modes = { [0] = "Overlapping", [1] = "Stacking: all", [2] = "Stacking: enemies",
    [3] = "Stacking: friendly", [-1] = "Smart: all", [-2] = "Smart: enemies",
    [-3] = "Smart: friendly" }
  if not value then return "Stacking controls unavailable on this client.", false end
  return string.format("%s | Vertical push: %s plate heights | Horizontal pull: %s",
    modes[tonumber(value)] or tostring(value), GetCVar("nameplateRaiseDistance") or "?",
    GetCVar("nameplatePullDistance") or "?"), true
end

local function apply(values)
  local before = {}
  for _, entry in ipairs(values) do
    local current = GetCVar(entry[1])
    if current == nil then return false, "Unavailable setting: " .. entry[1] end
    before[#before + 1] = { entry[1], current }
  end
  for _, entry in ipairs(values) do
    local ok = pcall(SetCVar, entry[1], tostring(entry[2]))
    if not ok or tonumber(GetCVar(entry[1])) ~= tonumber(entry[2]) then
      for _, previous in ipairs(before) do pcall(SetCVar, previous[1], previous[2]) end
      return false, "Could not apply " .. entry[1] .. ". Check Maniax CVar."
    end
  end
  return true, before
end

function Addon:ApplyCrowdedStacking()
  local ok, previous = apply(preset)
  if not ok then return false, previous end
  self.db.stackingRestore = self.db.stackingRestore or previous
  return true
end

function Addon:RestoreStacking()
  if not self.db.stackingRestore then return false, "No saved stacking settings to restore." end
  local ok, reason = apply(self.db.stackingRestore)
  if ok then self.db.stackingRestore = nil end
  return ok, reason
end

function Addon:OpenStackingOptions()
  if SlashCmdList.MANIAXCVAR then
    SlashCmdList.MANIAXCVAR("show")
    return true
  end
  return false, "Enable Maniax CVar to open its settings."
end