" ============================================================================
" Modern Vim Configuration
" ============================================================================

" ----------------------------------------------------------------------------
" Vim-Plug Plugin Manager
" ----------------------------------------------------------------------------
call plug#begin('~/.vim/plugged')

" fzf - Blazing fast fuzzy finder (written in Go)
Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
Plug 'junegunn/fzf.vim'

" Essential editing plugins
Plug 'tpope/vim-sensible'          " Sensible defaults
Plug 'tpope/vim-commentary'        " Easy commenting (gc)
Plug 'tpope/vim-surround'          " Surround text objects (cs, ds, ys)
Plug 'tpope/vim-repeat'            " Better . repeat for plugins

" UI improvements
Plug 'itchyny/lightline.vim'       " Lightweight statusline
Plug 'machakann/vim-highlightedyank' " Highlight yanked text briefly

" Markdown
Plug 'iamcco/markdown-preview.nvim', { 'do': 'cd app && npx --yes yarn install' }

" Color schemes
Plug 'joshdick/onedark.vim'        " Modern dark theme (similar to VS Code)

call plug#end()

" ----------------------------------------------------------------------------
" General Settings
" ----------------------------------------------------------------------------
set number                          " Show line numbers
set showcmd                         " Show command in bottom bar
set wildmenu                        " Visual autocomplete for command menu
set mouse=a                         " Enable mouse support

" Search settings
set ignorecase                      " Ignore case when searching
set smartcase                       " Unless uppercase is used
set hlsearch                        " Highlight search results
set incsearch                       " Incremental search

" Indentation
set tabstop=2                       " Visual spaces per TAB
set softtabstop=2                   " Spaces per TAB when editing
set shiftwidth=2                    " Spaces for autoindent
set expandtab                       " Tabs are spaces
set smartindent                     " Smart autoindenting

" Performance
set updatetime=300                  " Faster completion (default 4000ms)
set timeoutlen=500                  " Faster key sequence completion
set ttyfast                         " Faster terminal connection
set synmaxcol=300                   " Only syntax highlight first 300 columns

" Backups
set nobackup                        " No backup files
set nowritebackup                   " No backup before overwriting
set noswapfile                      " No swap files

" Visual
syntax enable                       " Enable syntax highlighting
set background=dark                 " Dark background
set termguicolors                   " True color support

" Try to load onedark, fallback to default if not installed yet
try
  colorscheme onedark
catch
  " OneDark not installed yet, will work after PlugInstall
endtry

" Custom highlighting for line numbers (dimmer, like your editor)
highlight LineNr ctermfg=240 guifg=#5c6370
highlight CursorLineNr ctermfg=250 guifg=#abb2bf

" Enable italic comments
highlight Comment cterm=italic gui=italic

" Better split behavior
set splitbelow                      " Horizontal splits below
set splitright                      " Vertical splits to the right

" Persistent undo
set undofile                        " Save undo history
set undodir=~/.vim/undo             " Undo directory
if !isdirectory(expand('~/.vim/undo'))
  call mkdir(expand('~/.vim/undo'), 'p')
endif

" ----------------------------------------------------------------------------
" fzf Configuration (Much Faster Than CtrlP)
" ----------------------------------------------------------------------------
" Use fd for better performance, falling back to git ls-files then find
" Always excludes node_modules and dist
if executable('fd')
  let $FZF_DEFAULT_COMMAND = 'fd --type f --hidden --follow --exclude node_modules --exclude dist --exclude .git'
else
  let $FZF_DEFAULT_COMMAND = 'git ls-files --cached --others --exclude-standard 2>/dev/null || find . -type f -not -path "*/node_modules/*" -not -path "*/dist/*" -not -path "*/.git/*"'
endif

" fzf layout - bottom split with 40% height
let g:fzf_layout = { 'down': '40%' }

" Customize fzf colors to match Vim color scheme
let g:fzf_colors =
\ { 'fg':      ['fg', 'Normal'],
  \ 'bg':      ['bg', 'Normal'],
  \ 'hl':      ['fg', 'Comment'],
  \ 'fg+':     ['fg', 'CursorLine', 'CursorColumn', 'Normal'],
  \ 'bg+':     ['bg', 'CursorLine', 'CursorColumn'],
  \ 'hl+':     ['fg', 'Statement'],
  \ 'info':    ['fg', 'PreProc'],
  \ 'border':  ['fg', 'Ignore'],
  \ 'prompt':  ['fg', 'Conditional'],
  \ 'pointer': ['fg', 'Exception'],
  \ 'marker':  ['fg', 'Keyword'],
  \ 'spinner': ['fg', 'Label'],
  \ 'header':  ['fg', 'Comment'] }

" Disable preview by default (toggle with ctrl-/ for speed)
let g:fzf_preview_window = ['right:50%:hidden', 'ctrl-/']

" ----------------------------------------------------------------------------
" Lightline Configuration
" ----------------------------------------------------------------------------
set laststatus=2                    " Always show statusline
set noshowmode                      " Don't show mode (lightline shows it)

let g:lightline = {
      \ 'colorscheme': 'onedark',
      \ 'active': {
      \   'left': [ [ 'mode', 'paste' ],
      \             [ 'readonly', 'filename', 'modified' ] ],
      \ },
      \ }

" ----------------------------------------------------------------------------
" Key Mappings
" ----------------------------------------------------------------------------
" Set leader key to space
let mapleader = " "

" Quick save
nnoremap <leader>w :w<CR>

" Quick quit
nnoremap <leader>q :q<CR>

" Clear search highlighting
nnoremap <leader><space> :nohlsearch<CR>

" Better window navigation
nnoremap <C-h> <C-w>h
nnoremap <C-j> <C-w>j
nnoremap <C-k> <C-w>k
nnoremap <C-l> <C-w>l

" fzf shortcuts (same as CtrlP for muscle memory)
nnoremap <leader>p :Files<CR>
nnoremap <leader>b :Buffers<CR>
nnoremap <leader>m :History<CR>
nnoremap <leader>f :Rg<CR>
nnoremap <C-p> :Files<CR>

" Move lines up/down in visual mode
vnoremap J :m '>+1<CR>gv=gv
vnoremap K :m '<-2<CR>gv=gv

" Better indenting in visual mode
vnoremap < <gv
vnoremap > >gv

" ----------------------------------------------------------------------------
" Auto Commands
" ----------------------------------------------------------------------------
" Return to last edit position when opening files
augroup LastPosition
  autocmd!
  autocmd BufReadPost *
    \ if line("'\"") > 0 && line("'\"") <= line("$") |
    \   exe "normal! g`\"" |
    \ endif
augroup END

" Remove trailing whitespace on save
augroup TrimWhitespace
  autocmd!
  autocmd BufWritePre * :%s/\s\+$//e
augroup END

" Highlight yanked text briefly (vim-highlightedyank plugin handles this)
" Note: lua vim.highlight.on_yank only works in Neovim, removed to avoid errors