vim.o.number = true                         -- line numbers
vim.o.list = true                           -- show whitespace
vim.o.textwidth = 80                        -- default text width
vim.o.colorcolumn = tostring(vim.o.textwidth)
vim.o.wrap = false

vim.o.expandtab = true                      -- indent using spaces
vim.o.tabstop = 4                           -- 1 tab = 4 spaces
vim.o.shiftwidth = 4                        -- 1 indentation = 4 spaces

vim.o.completeopt = 'menu,menuone,noselect' -- completion popup
vim.o.autochdir = true                      -- change workir to current file dir
vim.o.clipboard = 'unnamedplus'             -- use sytem clipboard

-- theme
vim.o.termguicolors = true                  -- 24 bit colours
vim.o.background = 'dark'
packer.use {
    'https://github.com/owozsh/amora',
    config = function()
        vim.cmd('colorscheme amora')
    end
}

-- remove trailing whitespace
function my_remove_trailing_whitespace()
    local curpos = vim.api.nvim_win_get_cursor(0)
    vim.cmd([[keeppatterns %s/\s\+$//e]])
    vim.api.nvim_win_set_cursor(0, curpos)
end

vim.api.nvim_create_autocmd(
    { 'BufWritePre' },
    {
        pattern = {
            '*.lua', '*.cpp', '*.hpp'
        },
        callback = my_remove_trailing_whitespace
    }
)

packer.use 'https://github.com/editorconfig/editorconfig-vim'

-- set colorcolumn to textwidth after buffer is displayed or option is changed
vim.api.nvim_create_autocmd(
    { 'BufWinEnter', 'OptionSet' },
    {
        pattern = { 'textwidth' },
        callback = function()
            if vim.o.textwidth > 0 then
                vim.wo.colorcolumn = tostring(vim.o.textwidth)
            else
                vim.wo.colorcolumn = ''
            end
        end
    }
)