require("compe").setup(
    {
        enabled = true,
        autocomplete = true,
        debug = false,
        min_length = 1,
        preselect = "enable",
        throttle_time = 80,
        source_timeout = 200,
        resolve_timeout = 800,
        incomplete_delay = 400,
        max_abbr_width = 100,
        max_kind_width = 100,
        max_menu_width = 100,
        documentation = {
            border = {"", "", "", " ", "", "", "", " "}, -- the border option is the same as `|help nvim_open_win|`
            winhighlight = "NormalFloat:CompeDocumentation,FloatBorder:CompeDocumentationBorder",
            max_width = 120,
            min_width = 60,
            max_height = math.floor(vim.o.lines * 0.3),
            min_height = 1
        },
        source = {
            path = true,
            buffer = true,
            calc = true,
            nvim_lsp = true,
            nvim_lua = true,
            vsnip = true,
            ultisnips = true,
            luasnip = true
        }
    }
)
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
    return col == 0 or vim.fn.getline("."):sub(col, col):match("%s") ~= nil
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["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["vsnip#jumpable"](-1) == 1 then
        return t "<Plug>(vsnip-jump-prev)"
    else
        -- If <S-Tab> is not working in your terminal, change it to <C-h>
        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})