local M = {}

function M.root(root)
  local f = debug.getinfo(1, "S").source:sub(2)
  return vim.fn.fnamemodify(f, ":p:h:h") .. "/" .. (root or "")
end

---@param plugin string
function M.load(plugin)
  local name = plugin:match(".*/(.*)")
  local package_root = M.root(".tests/site/pack/deps/start/")
  local dst = package_root .. name
  print(string.format("Loading %q at %q\n", plugin, dst))

  if not vim.loop.fs_stat(dst) then
    print("Installing " .. plugin)
    vim.fn.mkdir(package_root, "p")
    vim.fn.system({
      "git",
      "clone",
      "--depth=1",
      "https://github.com/" .. plugin .. ".git",
      dst,
    })
  else
    print(string.format("Already installed %q as %q", plugin, dst))
  end
end

function M.setup()
  vim.cmd([[set runtimepath=$VIMRUNTIME]])
  vim.opt.runtimepath:append(M.root())
  vim.opt.packpath = { M.root(".tests/site") }

  M.load("nvim-lua/plenary.nvim")

  vim.env.XDG_CONFIG_HOME = M.root(".tests/config")
  vim.env.XDG_DATA_HOME = M.root(".tests/data")
  vim.env.XDG_STATE_HOME = M.root(".tests/state")
  vim.env.XDG_CACHE_HOME = M.root(".tests/cache")
end

M.setup()
