local MAP     = vim.keymap.set
local AUTOCMD = vim.api.nvim_create_autocmd

vim.cmd("colorscheme scheme")
vim.cmd("filetype indent on")

-- Language people you have more important things to do than police the code style, if people
-- want consistent styling it should be done at a project level using a linter or .editorconfig
vim.g.rust_recommended_style     = false
vim.g.python_recommended_style   = false
vim.g.go_recommended_style       = false
vim.g.zig_recommended_style      = false
vim.g.markdown_recommended_style = false
vim.g.arduino_recommended_style  = false
vim.g.gdscript_recommended_style = false
vim.g.yaml_recommended_style     = false

-- Basic options
vim.o.tabstop        = 2
vim.o.shiftwidth     = 0
vim.o.expandtab      = false
vim.o.list           = true
vim.o.clipboard      = "unnamedplus"
vim.o.ff             = "unix"
vim.o.ffs            = "unix,dos"
vim.o.switchbuf      = "useopen,uselast"
vim.o.textwidth      = 95
vim.o.wrapmargin     = 5
vim.o.number         = true
vim.o.relativenumber = true
vim.o.splitbelow     = true
vim.o.splitright     = true
vim.o.autoread       = true
vim.o.lazyredraw     = true
vim.o.cursorline     = true
vim.o.ignorecase     = true
vim.o.wrap           = false
vim.o.wildmenu       = false
vim.o.termguicolors  = true
vim.o.cindent        = true
vim.o.timeoutlen     = 1500
vim.o.completeopt    = "preview"
vim.o.wildmode       = "full"
vim.o.cinoptions     = "l1,b-s"
vim.o.statusline     = "%#LineNr# [%n] %#Default# %f%m%r %= %#StatusLineNC# %w[%{&ft == '' ? 'None' : ''}%Y] %#LineNr# Line: %l Column: %c "

vim.opt.errorformat = {
	"%f:%l:%c: fatal %trror: %m", -- gcc/clang fatal error
	"%f:%l:%c: %trror: %m",       -- gcc/clang error
	"%f:%l:%c: %tarning: %m",     -- gcc/clang warning
	"%-G%m"                       -- Ignore anything else
}

vim.opt.formatoptions:append("/")
vim.opt.cinkeys:append("0=break")
vim.opt.listchars:append({ lead = "." })

--------------------------------------------------------------------------------
-- Functions
--------------------------------------------------------------------------------

-- Buffers

local function BufferComplete()
	local pos   = vim.api.nvim_win_get_cursor(0)
	local line  = vim.fn.getline('.')
	local ident = line:sub(1, pos[2]):match("[^ \t]*$")

	return #ident ~= 0 and "<C-P>" or "<Tab>"
end

local function TrimBuffer()
	local view = vim.fn.winsaveview()
	vim.cmd("%s/\\s\\+$//e")
	vim.fn.winrestview(view)
end

-- Input mappings

vim.g.mapleader = " "

MAP("n", "<A-j>",     "mz:m+<CR>")
MAP("n", "<A-k>",     "mz:m-2<CR>")
MAP("n", "<Esc>",     ":nohl<CR>")
MAP("n", "<Leader>n", ":cnext<CR>")
MAP("n", "<Leader>N", ":cprev<CR>")
MAP("n", "J",         "}")
MAP("v", "J",         "}")
MAP("n", "K",         "{")
MAP("v", "K",         "{")
MAP("n", "<Leader>k", ":Man<CR>")
MAP("i", "<S-Tab>",   "<C-o><<")
MAP("i", "<Tab>",     BufferComplete, { expr = true })

-- Autocommands

AUTOCMD('BufEnter',    { command = "let b:man_default_sects=\"2,3\"", pattern = "*.c"      })
AUTOCMD('BufReadPost', { command = "setlocal nornu",                  pattern = "quickfix" })

AUTOCMD('BufWritePre', { callback = TrimBuffer, pattern = "*" })