local pickers = require("telescope.pickers")
local finders = require("telescope.finders")
local previewers = require("telescope.previewers")
local conf = require("telescope.config").values
local actions = require("telescope.actions")
local action_state = require("telescope.actions.state")

local M = {}

local function genmenu()
  local list = {}
  local function add(name, plug)
    if not plug then
      table.insert(list, name)
    elseif package.loaded[plug] then
      table.insert(list, name)
    end
  end

  add('Edit Config', nil)
  add('Update Plugins', 'dep')
  add('Keybinds', 'telescope')
  add('Colorscheme', 'telescope')

  return list
end

function M.configmenu()
  pickers.new({
    prompt_title = "Nvim Config Menu",
    finder = finders.new_table { results = genmenu() },
    sorter = conf.generic_sorter(),
    previewer = previewers.new_buffer_previewer {
      define_preview = function(self, entry)
        local lines = {
          'a'
        }
        if entry.value == "Edit Config" then
          lines = misc.readf(vim.fn.stdpath('config')..'/init.lua')
          local ft = vim.filetype.match({
            filename = os.getenv('XDG_CONFIG_HOME')..'/nvim/init.lua' })
          require("telescope.previewers.utils").highlighter(self.state.bufnr, ft)
        elseif entry.value == "Colorscheme" then
          lines = vim.fn.getcompletion('', 'color')
          for k, v in pairs(lines) do
            if v.find(v, '.ext') then
              table.remove(lines, k)
              break
            end
          end
        end
        vim.api.nvim_buf_set_lines(self.state.bufnr, 0, -1, false, lines)
      end
    },

    attach_mappings = function(bufnr, map)
      actions.select_default:replace(function()
        actions.close(bufnr)
        local selection = action_state.get_selected_entry()
        if selection[1] == 'Edit Config' then
          vim.cmd('e '..vim.fn.stdpath('config')..'/init.lua')
        elseif selection[1] == 'Update Plugins' then
          require('dep').sync()
          if package.loaded['nvim-treesitter'] then
            vim.cmd('TSUpdate')
          end
          if package.loaded['mason'] then
            require('mason.api.command').MasonUpdate()
          end
        elseif selection[1] == 'Keybinds' then
          require('telescope.builtin').keymaps()
        elseif selection[1] == 'Colorscheme' then
          require('core.theme').switcher()
        end
      end)
      return true
    end,
  }):find()
end

return M