local LazyUtil = require("lazy.core.util")

---@class lazyvim.util: LazyUtilCore
---@field ui lazyvim.util.ui
---@field lsp lazyvim.util.lsp
---@field root lazyvim.util.root
---@field telescope lazyvim.util.telescope
---@field terminal lazyvim.util.terminal
---@field toggle lazyvim.util.toggle
---@field format lazyvim.util.format
---@field plugin lazyvim.util.plugin
---@field extras lazyvim.util.extras
---@field inject lazyvim.util.inject
---@field news lazyvim.util.news
---@field json lazyvim.util.json
---@field lualine lazyvim.util.lualine
local M = {}

---@type table<string, string|string[]>
local deprecated = {
  get_clients = "lsp",
  on_attach = "lsp",
  on_rename = "lsp",
  root_patterns = { "root", "patterns" },
  get_root = { "root", "get" },
  float_term = { "terminal", "open" },
  toggle_diagnostics = { "toggle", "diagnostics" },
  toggle_number = { "toggle", "number" },
  fg = "ui",
}

setmetatable(M, {
  __index = function(t, k)
    if LazyUtil[k] then
      return LazyUtil[k]
    end
    local dep = deprecated[k]
    if dep then
      local mod = type(dep) == "table" and dep[1] or dep
      local key = type(dep) == "table" and dep[2] or k
      M.deprecate([[require("lazyvim.util").]] .. k, [[require("lazyvim.util").]] .. mod .. "." .. key)
      ---@diagnostic disable-next-line: no-unknown
      t[mod] = require("lazyvim.util." .. mod) -- load here to prevent loops
      return t[mod][key]
    end
    ---@diagnostic disable-next-line: no-unknown
    t[k] = require("lazyvim.util." .. k)
    return t[k]
  end,
})

function M.is_win()
  return vim.loop.os_uname().sysname:find("Windows") ~= nil
end

---@param plugin string
function M.has(plugin)
  return require("lazy.core.config").spec.plugins[plugin] ~= nil
end

---@param fn fun()
function M.on_very_lazy(fn)
  vim.api.nvim_create_autocmd("User", {
    pattern = "VeryLazy",
    callback = function()
      fn()
    end,
  })
end

---@param name string
function M.opts(name)
  local plugin = require("lazy.core.config").plugins[name]
  if not plugin then
    return {}
  end
  local Plugin = require("lazy.core.plugin")
  return Plugin.values(plugin, "opts", false)
end

function M.deprecate(old, new)
  M.warn(("`%s` is deprecated. Please use `%s` instead"):format(old, new), {
    title = "LazyVim",
    once = true,
    stacktrace = true,
    stacklevel = 6,
  })
end

-- delay notifications till vim.notify was replaced or after 500ms
function M.lazy_notify()
  local notifs = {}
  local function temp(...)
    table.insert(notifs, vim.F.pack_len(...))
  end

  local orig = vim.notify
  vim.notify = temp

  local timer = vim.loop.new_timer()
  local check = assert(vim.loop.new_check())

  local replay = function()
    timer:stop()
    check:stop()
    if vim.notify == temp then
      vim.notify = orig -- put back the original notify if needed
    end
    vim.schedule(function()
      ---@diagnostic disable-next-line: no-unknown
      for _, notif in ipairs(notifs) do
        vim.notify(vim.F.unpack_len(notif))
      end
    end)
  end

  -- wait till vim.notify has been replaced
  check:start(function()
    if vim.notify ~= temp then
      replay()
    end
  end)
  -- or if it took more than 500ms, then something went wrong
  timer:start(500, 0, replay)
end

---@param name string
---@param fn fun(name:string)
function M.on_load(name, fn)
  local Config = require("lazy.core.config")
  if Config.plugins[name] and Config.plugins[name]._.loaded then
    fn(name)
  else
    vim.api.nvim_create_autocmd("User", {
      pattern = "LazyLoad",
      callback = function(event)
        if event.data == name then
          fn(name)
          return true
        end
      end,
    })
  end
end

-- Wrapper around vim.keymap.set that will
-- not create a keymap if a lazy key handler exists.
-- It will also set `silent` to true by default.
function M.safe_keymap_set(mode, lhs, rhs, opts)
  local keys = require("lazy.core.handler").handlers.keys
  ---@cast keys LazyKeysHandler
  local modes = type(mode) == "string" and { mode } or mode

  ---@param m string
  modes = vim.tbl_filter(function(m)
    return not (keys.have and keys:have(lhs, m))
  end, modes)

  -- do not create the keymap if a lazy keys handler exists
  if #modes > 0 then
    opts = opts or {}
    opts.silent = opts.silent ~= false
    if opts.remap and not vim.g.vscode then
      ---@diagnostic disable-next-line: no-unknown
      opts.remap = nil
    end
    vim.keymap.set(modes, lhs, rhs, opts)
  end
end

return M