-- Author        : swytch
-- Created       : Tuesday Mar 18, 2021 23:12:25 CET
-- License       : GPLv3
-- Description   : compe plugin config file

require("compe").setup {
        enabled                 = true;
        autocomplete            = false;
        debug                   = false;
        min_length              = 1;
        preselect               = "enable";
        throttle_time           = 80;
        source_timeout          = 200;
        incomplete_delay        = 400;
        max_abbr_width          = 100;
        max_kind_width          = 10;
        max_menu_width          = 100;
        documentation           = true;

        source = {
                path            = {menu = "  [path]"},
                buffer          = {menu = "  [buff]"},
                calc            = {menu = "  [calc]"},
                -- vsnip        = {menu = "  [snip]"},
                nvim_lsp        = {menu = "  [LSP]"},
                nvim_lua        = {menu = "  [nvim]"},
                spell           = {menu = "  [spel]"},
                tags            = false,
                treesitter      = {menu = "  [tree]"},
        };
}

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})