local cmp = require('cmp')

cmp.setup({
  completion = {
    keyword_length = 1, -- TODO set this back 3, when fine with snippets
  },
  snippet = {
    expand = function(args)
      vim.fn["vsnip#anonymous"](args.body)
    end,
  },
  mapping = {
    ['<cr>'] = cmp.mapping.confirm({ select = true }),
  },
  sources = cmp.config.sources({
    { name = 'nvim_lsp' },
    { name = 'vsnip' },
    { 
      name = 'buffer',
      option = {
        get_bufnrs = function()
          return vim.api.nvim_list_bufs()
        end
      },
    },
    { name = 'path' },
    { name = 'tmux', option = { all_panes = true } }, -- TODO 'true' makes things sloppy
    { name = 'calc' },
  }),

  formatting = {
    format = function(entry, vim_item)
      vim_item.menu = ({
        buffer = "[Buffer]",
        calc = "[Calc]",
        nvim_lsp = "[LSP]",
        path = "[Path]",
        tmux = "[tmux]",
        vsnip = "[Snippet]",
      })[entry.source.name]
      return vim_item
    end
  },
})