" You want Vim, not vi. When Vim finds a vimrc, 'nocompatible' is set anyway.
let g:disable_bg = 1  
let mapleader = " "

set nocompatible

filetype plugin indent on  " Load plugins according to detected filetype.
syntax on                  " Enable syntax highlighting.

set autoindent             " Indent according to previous line.
set expandtab              " Use spaces instead of tabs.
set softtabstop =2         " Tab key indents by 4 spaces.
set shiftwidth  =2         " >> indents by 4 spaces.
set shiftround             " >> indents to next multiple of 'shiftwidth'.

set backspace   =indent,eol,start  " Make backspace work as you would expect.
set hidden                 " Switch between buffers without having to save first.
set laststatus  =2         " Always show statusline.
set display     =lastline  " Show as much as possible of the last line.
set number
set relativenumber

set showmode               " Show current mode in command-line.
set showcmd                " Show already typed keys when more are expected.

set incsearch              " Highlight while searching with / or ?.
set ignorecase             " Case-insensitive search...
set smartcase              " ...unless uppercase used
set hlsearch               " Highlight matches

set backspace=indent,eol,start " Sane backspace behaviour

set ttyfast                " Faster redrawing.
set lazyredraw             " Only redraw when necessary.

set splitbelow             " Open new windows below the current window.
set splitright             " Open new windows right of the current window.

set wrapscan               " Searches wrap around end-of-file.
set report      =0         " Always report changed lines.
set synmaxcol   =200       " Only highlight the first 200 columns.
set clipboard=unnamedplus

cnoreabbrev W! w!
cnoreabbrev Q! q!
cnoreabbrev W  w
cnoreabbrev Wq wq
cnoreabbrev WQ wq
cnoreabbrev wQ wq
cnoreabbrev qw wq

" Basic UI settings
syntax on
set background=dark
colorscheme gruvbox

" Recommended settings for better appearance
set cursorline          " Highlight current line
set termguicolors       " Enable true color support (if terminal supports it)


function! GitBranch()
  let l:git_dir = finddir('.git', expand('%:p:h') . ';')
  if empty(l:git_dir)
    return ''
  endif
  let l:branch = system('git -C ' . fnameescape(expand('%:p:h')) . ' rev-parse --abbrev-ref HEAD 2> /dev/null')
  return substitute(l:branch, '\n', '', '')
endfunction

set laststatus=2
set statusline=%f
set statusline+=%h%m%r%w
set statusline+=\ %{GitBranch()}
set statusline+=\ [%{&ff}]
set statusline+=\ [%{&fileencoding}]
set statusline+=\ [%Y]
set statusline+=\ %=
set statusline+=Ln\ %l/%L
set statusline+=\ Col\ %c
set statusline+=\ [%p%%]


" The fish shell is not very compatible to other shells and unexpectedly
" breaks things that use 'shell'.
if &shell =~# 'fish$'
  set shell=/bin/bash
endif

function! CompileAndRun()
  let l:filename = expand('%:p')
  let l:output = expand('%:r')
  if empty(l:filename) || empty(l:output)
    echoerr "❌ File has not been saved. Save it before compiling."
    return
  endif

  let l:current_winnr = winnr()
  
  " Check if the compile output buffer already exists
  let l:compile_bufnr = bufnr('__COMPILE_OUTPUT__')
  let l:compile_winnr = bufwinnr(l:compile_bufnr)
  
  if l:compile_winnr == -1
    " Buffer doesn't exist in any window, create new vsplit
    vsplit
    enew
    setlocal buftype=nofile bufhidden=wipe nobuflisted noswapfile
    " Give the buffer a name for easy identification
    file __COMPILE_OUTPUT__
  else
    " Buffer exists in a window, switch to it
    execute l:compile_winnr . 'wincmd w'
    " Clear the buffer content
    %delete _
  endif
  
  let l:compile_cmd = 'gcc -Wall ' . shellescape(l:filename) . ' -o ' . shellescape(l:output)
  let l:result = system(l:compile_cmd)
  if v:shell_error
    call append(0, split(l:result, "\n"))
  else
    call append(0, ['✅ Compiled successfully.', '', '--- Running output: ---', ''])
    let l:run_output = system('./' . l:output)
    call append(line('$'), split(l:run_output, "\n"))
  endif
  
  " Remove the empty line at the top
  if line('$') > 1 && getline(1) == ''
    1delete _
  endif

    execute l:current_winnr . 'wincmd w'
endfunction


command! Compile call CompileAndRun()
nnoremap <leader>c :Compile<CR>