-- true color support
vim.o.termguicolors = true

-- fix transparency issues with alacritty
local highlights = {
  'Normal',
  'LineNr',
  'Folded',
  'NonText',
  'SpecialKey',
  'VertSplit',
  'SignColumn',
  'EndOfBuffer',
  'TablineFill', -- this is specific to how I like my tabline to look like
}
for _, name in pairs(highlights) do
  vim.cmd.highlight(name .. ' guibg=none ctermbg=none')
end

-- disable arrow keys
local all_modes = { 'n', 'i', 'v', 'o' }

vim.keymap.set(all_modes, '<Up>', '<Nop>', { noremap = true, silent = true })
vim.keymap.set(all_modes, '<Down>', '<Nop>', { noremap = true, silent = true })
vim.keymap.set(all_modes, '<Left>', '<Nop>', { noremap = true, silent = true })
vim.keymap.set(all_modes, '<Right>', '<Nop>', { noremap = true, silent = true })

vim.o.number = true -- display line numbers
vim.opt.clipboard:append({ 'unnamedplus', 'unnamed' }) -- always use clipboard in x11
vim.o.encoding = 'UTF-8' -- sets the character encoding used inside vim
vim.o.title = true -- when on, the title of the window will be set to the value of 'titlestring'
vim.o.signcolumn = 'yes'

-- spell checking
vim.o.spell = true
vim.opt.spelllang:append({ 'en_us', 'en_gb', 'pl' })
vim.opt.spelloptions:append({ 'camel' })
vim.o.spellcapcheck = ''

-- persistent undo
local undodir = vim.fn.stdpath('state') .. 'undo'
vim.fn.mkdir(undodir, 'p', '0700')
vim.o.undodir = undodir
vim.o.undofile = true

-- set proper file types for files in ~/ansible directory
vim.filetype.add({
  pattern = {
    [os.getenv('HOME') .. '/ansible/.*%.yml'] = 'yaml.ansible',
  },
})

-- neovim terminal configuration
local augroup_term = vim.api.nvim_create_augroup('augroup_term', { clear = true })
vim.api.nvim_create_autocmd('TermOpen', { -- enter insert mode automatically
  group = augroup_term,
  pattern = '*',
  callback = vim.cmd.startinsert,
})
vim.api.nvim_create_autocmd('TermOpen', { -- disable number lines on terminal buffers
  group = augroup_term,
  pattern = '*',
  callback = function()
    vim.o.number = false
    vim.o.relativenumber = false
  end,
})
vim.api.nvim_create_autocmd('TermOpen', { -- allow use ctrl-c on terminal windows
  group = augroup_term,
  pattern = '*',
  callback = function(args)
    vim.keymap.set('n', '<C-c>', 'i<C-c>', { buffer = args.buf })
  end,
})
vim.api.nvim_create_autocmd('TermEnter', { -- no sign column
  group = augroup_term,
  pattern = '*',
  callback = function()
    vim.opt_local.signcolumn = false
  end,
})
vim.keymap.set('t', '<Esc>', '<C-\\><C-n>') -- esc to exit insert mode

-- set default tab width to 4 spaces
vim.o.tabstop = 4 -- number of spaces that a tab counts for
vim.o.shiftwidth = 4 -- number of spaces that are inserted during indent operations
vim.o.softtabstop = 4 -- number of spaces that are inserted after pressing tab
vim.o.expandtab = true -- use spaces instead of tabs

-- c/c++ settings
vim.opt.cinoptions:append({ 'N-s' })

-- web dev settings
vim.g.html_indent_autotags = 'html,thead,tbody,tfoot'
vim.g.html_indent_script1 = 'auto'
vim.g.html_indent_style1 = 'auto'

-- set cursor shape to underline in the normal and command mode,
-- in the insert mode change shape to vertical bar, and disable
-- blinking in all modes
vim.opt.guicursor:append({ 'n-c:hor20', 'i:ver20', 'a:blinkon0' })