inoremap <expr> <CR> compe#confirm('<CR>')
inoremap <silent><expr> <C-Space> compe#complete()
inoremap <silent><expr> <C-e>     compe#close('<C-e>')
inoremap <silent><expr> <C-f>     compe#scroll({ 'delta': +4 })
inoremap <silent><expr> <C-d>     compe#scroll({ 'delta': -4 })
set shortmess+=c

lua << EOF
    -- Compe tab modifier to tab through popup window 
    local t = function(str)
      return vim.api.nvim_replace_termcodes(str, true, true, true)
    end

    local check_back_space = function()
        local col = vim.fn.col('.') - 1
        if col == 0 or vim.fn.getline('.'):sub(col, col):match('%s') then
            return true
        else
            return false
        end
    end

    -- Use (s-)tab to:
    --- move to prev/next item in completion menuone
    --- jump to prev/next snippet's placeholder
    _G.tab_complete = function()
      if vim.fn.pumvisible() == 1 then
        return t "<C-n>"
      elseif vim.fn.call("vsnip#available", {1}) == 1 then
        return t "<Plug>(vsnip-expand-or-jump)"
      elseif check_back_space() then
        return t "<Tab>"
      else
        return vim.fn['compe#complete']()
      end
    end
    _G.s_tab_complete = function()
      if vim.fn.pumvisible() == 1 then
        return t "<C-p>"
      elseif vim.fn.call("vsnip#jumpable", {-1}) == 1 then
        return t "<Plug>(vsnip-jump-prev)"
      else
        return t "<S-Tab>"
      end
    end

    vim.api.nvim_set_keymap("i", "<Tab>", "v:lua.tab_complete()", {expr = true})
    vim.api.nvim_set_keymap("s", "<Tab>", "v:lua.tab_complete()", {expr = true})
    vim.api.nvim_set_keymap("i", "<S-Tab>", "v:lua.s_tab_complete()", {expr = true})
    vim.api.nvim_set_keymap("s", "<S-Tab>", "v:lua.s_tab_complete()", {expr = true})


    -- nvim-compe options
    -- Adding menu to this list causes more lag?
    vim.o.completeopt = "menuone,noselect"
    require('compe').setup({
      enabled = true,
      autocomplete = true,
      debug = false,
      min_length = 1,
      preselect = 'always',
      throttle_time = 80,
      source_timeout = 50,
      incomplete_delay = 400,
      max_abbr_width = 100,
      max_kind_width = 100,
      max_menu_width = 150,
      documentation = true,
      source = {
        vsnip = {menu = '[Snp]'},
        -- snippets = {menu = '[Snp]'},
        -- tabnine = {
        --     menu = '[Tabnine]',
        --     max_line = 1000,
        --     max_num_results = 6,
        -- },
        path = {menu = '[Path]'},
        buffer = {menu = '[Buffer]'},
        calc = false,
        tags = false,
        -- spell = {menu = '[Spell]'},
        nvim_lsp = {menu = '[Lsp]'},
        nvim_lua = {menu = '[Lua]'},
        treesitter = true,
        vim_dadbod_completion = true,
      },
    })

    local t = function(str)
      return vim.api.nvim_replace_termcodes(str, true, true, true)
    end

EOF