# MIT License
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

-- autoformat.lua
--
-- Use your language server to automatically format your code on save.
-- Adds additional commands as well to manage the behavior

return {
  'neovim/nvim-lspconfig',
  config = function()
    -- Switch for controlling whether you want autoformatting.
    --  Use :KickstartFormatToggle to toggle autoformatting on or off
    local format_is_enabled = true
    vim.api.nvim_create_user_command('KickstartFormatToggle', function()
      format_is_enabled = not format_is_enabled
      print('Setting autoformatting to: ' .. tostring(format_is_enabled))
    end, {})

    -- Create an augroup that is used for managing our formatting autocmds.
    --      We need one augroup per client to make sure that multiple clients
    --      can attach to the same buffer without interfering with each other.
    local _augroups = {}
    local get_augroup = function(client)
      if not _augroups[client.id] then
        local group_name = 'kickstart-lsp-format-' .. client.name
        local id = vim.api.nvim_create_augroup(group_name, { clear = true })
        _augroups[client.id] = id
      end

      return _augroups[client.id]
    end

    -- Whenever an LSP attaches to a buffer, we will run this function.
    --
    -- See `:help LspAttach` for more information about this autocmd event.
    vim.api.nvim_create_autocmd('LspAttach', {
      group = vim.api.nvim_create_augroup('kickstart-lsp-attach-format', { clear = true }),
      -- This is where we attach the autoformatting for reasonable clients
      callback = function(args)
        local client_id = args.data.client_id
        local client = vim.lsp.get_client_by_id(client_id)
        local bufnr = args.buf

        -- Only attach to clients that support document formatting
        if not client.server_capabilities.documentFormattingProvider then
          return
        end

        -- Tsserver usually works poorly. Sorry you work with bad languages
        -- You can remove this line if you know what you're doing :)
        if client.name == 'tsserver' then
          return
        end

        -- Create an autocmd that will run *before* we save the buffer.
        --  Run the formatting command for the LSP that has just attached.
        vim.api.nvim_create_autocmd('BufWritePre', {
          group = get_augroup(client),
          buffer = bufnr,
          callback = function()
            if not format_is_enabled then
              return
            end

            vim.lsp.buf.format({
              async = false,
              filter = function(c)
                return c.id == client.id
              end,
            })
          end,
        })
      end,
    })
  end,
}
-- The line beneath this is called `modeline`. See `:help modeline`
-- vim: ts=2 sts=2 sw=2 et