" VIM Configuration File
" Description: created for C/C++ development, but useful for Python too 
" Author: Bhaskar Tallamraju
" Original version: https://tbhaskar78.github.io/vimrc/
" Last modified by Jeff Elkner 13 Sept 2024 to remove things we don't use

" I like the desert theme the best
color desert
" turn syntax highlighting on
set t_Co=256
syntax on
" set the hightlight for search, with background black and red font
set hlsearch
hi Search ctermbg=black
hi Search ctermfg=Red

" Set no backup, avoids creating extra files by vim
set nobackup

"folding settings  
" zc folds at the current place
" zM folds everything
" zR unfolds everything
" za toggle folding
set foldmethod=indent   "fold based on indent
set foldnestmax=10      "deepest fold is 10 levels
set nofoldenable        "dont fold by default
set foldlevel=2         "this is just what i use

" set UTF-8 encoding
set enc=utf-8
set fenc=utf-8
set termencoding=utf-8

" disable vi compatibility (emulation of old bugs)
set nocompatible
"enable filetype
filetype plugin on
" use indentation of previous line
set autoindent
" use intelligent indentation for C
set smartindent
" configure tabwidth and insert spaces instead of tabs
set tabstop=4        " tab width is 4 spaces
set shiftwidth=4     " indent also with 4 spaces
set expandtab        " expand tabs to spaces
" wrap lines at 79 chars.
set textwidth=79
" turn line numbers on
" set number
" highlight matching braces
set showmatch
" intelligent comments
set comments=sl:/*,mb:\ *,elx:\ */
" c++ indent
set cindent
set cinoptions=g0
retab
"enable python syntax
let python_highlight_all = 1

" Enhanced keyboard mappings
" switch between header/source with F4
map <F4> :e %:p:s,.h$,.X123X,:s,.cpp$,.h,:s,.X123X$,.cpp,<CR>

" Build gcc, g++ or python code from here <Shift F8>
autocmd FileType c nnoremap <buffer> <S-F8> :update<bar>!gcc -Werror % && ./a.out<CR>
autocmd FileType c nnoremap <buffer> <S-F9> :update<bar>!gcc -g -Werror % && gdb ./a.out<CR>
autocmd FileType cpp nnoremap <buffer> <S-F8> :update<bar>!g++ -Werror -std=c++17 % && ./a.out<CR>
autocmd FileType cpp nnoremap <buffer> <S-F9> :update<bar>!g++ -g -Werror % && gdb ./a.out<CR>
autocmd FileType python nnoremap <buffer> <S-F8> :update<bar>!python3 %<CR>

" Auto build using make with <F5>
map <F5> :make<CR>
" Auto build using make with <S-F7>
map <S-F9> :make clean all<CR>

" auto cmd to add c header
autocmd bufnewfile *.c so ~/.vim/c_header
autocmd bufnewfile *.c exe "1," . 10 . "g/File Name :.*/s//File Name : " .expand("%")
autocmd bufnewfile *.c exe "1," . 10 . "g/Creation Date :.*/s//Creation Date : " .strftime("%d-%m-%Y")
autocmd Bufwritepre,filewritepre *.c execute "normal ma"
autocmd Bufwritepre,filewritepre *.c exe "1," . 10 . "g/Last Modified :.*/s/Last Modified :.*/Last Modified : " .strftime("%c")
autocmd bufwritepost,filewritepost *.c execute "normal `a"
" auto cmd to add cpp header
autocmd bufnewfile *.cpp so ~/.vim/cpp_header
autocmd bufnewfile *.cpp exe "1," . 10 . "g/File Name :.*/s//File Name : " .expand("%")
autocmd bufnewfile *.cpp exe "1," . 10 . "g/Creation Date :.*/s//Creation Date : " .strftime("%d-%m-%Y")
autocmd Bufwritepre,filewritepre *.cpp execute "normal ma"
autocmd Bufwritepre,filewritepre *.cpp exe "1," . 10 . "g/Last Modified :.*/s/Last Modified :.*/Last Modified : " .strftime("%c")
autocmd bufwritepost,filewritepost *.cpp execute "normal `a"
"execute retab  on write
autocmd BufWritePost,filewritepost *.c :retab
autocmd BufWritePost,filewritepost *.py :retab
autocmd BufWritePost,filewritepost *.cpp :retab
autocmd BufWritePost,filewritepost *.js :retab

if has("autocmd")
  " When editing a file, always jump to the last known cursor position.
  " Don't do it when the position is invalid or when inside an event handler
  " (happens when dropping a file on gvim).
  " Also don't do it when the mark is in the first line, that is the default
  " position when opening a file.
  autocmd BufReadPost *
    \ if line("'\"") > 1 && line("'\"") <= line("$") |
    \   exe "normal! g`\"" |
    \ endif

endif