-- helper functions {{{
local keymapper = vim.keymap
local globals = vim.g
local opt = vim.o
local cmd = vim.cmd
function nnoremap(l, r)
	keymapper.set('n', l, r) -- noremap is implied
end

function inoremap(l, r)
	keymapper.set('i', l, r)
end

function tnoremap(l, r)
	keymapper.set('t', l, r)
end
-- }}}

-- custom mappings {{{
globals.mapleader = ' '
nnoremap(';', ':')
nnoremap(':', ';')
nnoremap('<leader><leader>', ':')

-- source init.vim
-- requires rebuilding the configuration first
nnoremap('<leader>rr', function()
	cmd.source('~/.config/nvim/init.lua')
end)
-- edit init.vim
nnoremap('<leader>re', function()
	cmd.edit('~/.config/nvim/init.lua')
end)
-- openup netrw
nnoremap('<leader>fs', function()
	cmd.Lexplore()
end)

inoremap('qp', '<c-g>u<Esc>[s1z=`]a<c-g>u')
inoremap("<C-a>", "<Esc>mZ0i<Tab><Esc>`ZlA")
inoremap('jk', '<Esc>')
inoremap('zz', '<Esc>:w!<CR>a')

tnoremap('<Esc>', '<C-\\><C-n>')
-- }}}

-- vim options {{{
opt.compatible = false
opt.number = true
opt.foldmethod = 'marker'
opt.encoding = 'utf8'
opt.list = true
opt.lcs = 'tab:->,trail:_,eol:^'
opt.clipboard = 'unnamedplus'
opt.spell = true
opt.spelllang = "en_us"
opt.title = true
opt.ts = 2
opt.sw = 2
opt.hlsearch = true
opt.incsearch = true
opt.ignorecase = true
opt.smartcase = true
opt.inccommand = 'nosplit'
opt.hidden = true
opt.linebreak = true
opt.path = '.,/usr/include,**'
opt.statusline="%f %r%m%q%h%=%y 0x%02B %04l:%03c:%03p"
vim.api.nvim_exec("let &titlestring='%{expand(\"%:p\")}'", true)

globals.vimtex_view_method = 'zathura'
-- }}}

-- autocommands {{{
function setTabbing(lang, width)
	vim.api.nvim_create_autocmd({"Filetype"}, {
		pattern = {lang},
		callback = function()
			vim.bo.expandtab = true
			vim.bo.tabstop = width
			vim.bo.shiftwidth = width
		end
	})
end

setTabbing("python", 4)
setTabbing("htmldjango", 4)
setTabbing("javascript", 4)
setTabbing("css", 4)
setTabbing("html", 4)
setTabbing("nix", 2)

vim.api.nvim_create_autocmd({"TermOpen"}, {
	pattern = {"*"},
	callback = function()
		vim.wo.number = false
	end
})

vim.api.nvim_create_autocmd({"TermOpen"}, {
	pattern = {"*"},
	command = "setlocal nospell",
})
-- }}}

-- netrw options {{{
globals.netrw_winsize = -28
globals.netrw_banner = 0
-- for tree view
globals.netrw_liststyle = 3
-- use previous window to open files
globals.netrw_browser_split = 4
-- }}}