" If anything not work as expected. Please make sure all plugins
" are installed by running:
" :PlugInstall

" Environment {

    " Basics {
    set nocompatible        " Must be first line
    " }
" }
    "
    " Plugin directory
    let config_dir = '~/.dotfiles/'
    let plugin_dir = '~/.vim/plugged/'
    let g:vim_dir = '~/.vim/'
    call plug#begin(plugin_dir)

        Plug 'neoclide/coc.nvim', {'branch': 'release'}
        Plug 'rust-lang/rust.vim'
        " syntax highlighting(and more) for typescript
        " {
            Plug 'leafgarland/typescript-vim'
        " }
        " {
            Plug 'alvan/vim-closetag'
            let g:closetag_filenames = '*.html,*.xhtml,*.phtml, *.js'
        " }
        
        "{
        "Plug 'altercation/vim-colors-solarized'
        "}

        Plug 'scrooloose/nerdtree'

        " for markdown{
        Plug 'godlygeek/tabular'
        Plug 'preservim/vim-markdown'
        "}
        
        " for window resize{
            Plug 'simeji/winresizer'
            let g:winresizer_start_key = '<leader-r>'
            let g:winresizer_vert_resize = 2
            let g:winresizer_horiz_resize = 2
        " }
        
        Plug 'tpope/vim-surround'
        Plug 'rhysd/conflict-marker.vim'
        " {
        Plug 'jiangmiao/auto-pairs'
        "let g:AutoPairsFlyMode = 1
        
        " }
        " {
        Plug 'mg979/vim-visual-multi'
        " }
    "if has('nvim') && str2float(g:nvim_version) >= 0.5 
    "    Plug 'nvim-lualine/lualine.nvim'
    "else
        Plug 'vim-airline/vim-airline'
        Plug 'vim-airline/vim-airline-themes'
    "endif

        " For nvim-bufferline
        " {
        "Plug 'kyazdani42/nvim-web-devicons'
        "Plug 'akinsho/nvim-bufferline.lua'
        " }
        Plug 'bling/vim-bufferline'
        Plug 'easymotion/vim-easymotion'
        Plug 'nathanaelkane/vim-indent-guides'
        Plug 'vim-scripts/restore_view.vim'

        if executable('fzf')
            Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
        endif

        " nvim support only theme
        " {
        "Plug 'projekt0n/github-nvim-theme'
        " }

        " vim theme
        " {
        Plug 'danilo-augusto/vim-afterglow'
        Plug 'NLKNguyen/papercolor-theme'
        " }

        if g:vim_type == 'nvim' && g:vim_version > 0.5
            Plug 'xiyaowong/nvim-transparent'
        endif
        Plug 'EdenEast/nightfox.nvim'

    call plug#end()

" Helper functions
" {

" }

" Plugin Preferences
" {
    " xiyaowong/nvim-transparent {
    
    " }

    " NerdTree {
        if isdirectory(expand(plugin_dir . "/nerdtree"))
            let g:NERDShutUp=1
            nnoremap <C-e> :NERDTreeToggle<CR>
            nnoremap <leader>e :NERDTreeToggle<CR>
            "nmap <leader>e :NERDTreeFind<CR>

            "let NERDTreeShowBookmarks=1
            "let NERDTreeIgnore=['\.py[cd]$', '\~$', '\.swo$', '\.swp$', '^\.git$', '^\.hg$', '^\.svn$', '\.bzr$']
            let NERDTreeChDirMode=0
            let NERDTreeQuitOnOpen=1
            let NERDTreeMouseMode=2
            let NERDTreeShowHidden=1
            let NERDTreeKeepTreeInNewTab=1
        endif
    " }
    " indent_guides {
        if isdirectory(expand(plugin_dir . "/vim-indent-guides/"))
            let g:indent_guides_start_level = 2
            let g:indent_guides_guide_size = 1
            let g:indent_guides_enable_on_vim_startup = 0
            map <leader>i :IndentGuidesToggle<CR>
            
        endif
    " }
     
    "if has('nvim') && str2float(g:nvim_version) >= 0.5 && isdirectory(expand(plugin_dir . "/lualine.nvim"))
    " nvim-lualine/lualine.nvim {
    " }
    "else
    " vim-airline {
        " Set configuration options for the statusline plugin vim-airline.
        " Use the powerline theme and optionally enable powerline symbols.
        let g:airline_section_b = ''
        let g:airline_section_z = ''
        let g:airline_section_y = ''
        let g:airline_section_x = ''
        let g:airline_section_warning = ''
        "let g:airline#extensions#tabline#left_sep = ''
        "let g:airline#extensions#tabline#left_alt_sep = '|'

        if isdirectory(expand(plugin_dir . "/vim-airline-themes/"))
            "let g:airline_theme = 'solarized'
        endif
    " }
    "endif

    " junegunnjunegunn/fzf {
        " [Buffers] Jump to the existing window if possible
        let g:fzf_buffers_jump = 1
        "let $FZF_DEFAULT_COMMAND = 'find -L'
        let $FZF_DEFAULT_COMMAND='find . \( -name node_modules -o -name .git \) -prune -o -print'
        noremap <leader>f :FZF<CR>
    " }
    
    " neoclide/coc.nvim {
        " add desired extensions to the following global variable
        " coc-tsserver: javascript
        " coc-pyright: python
        " coc-clangd: c/c++, may need to install clangd seperatly
        let g:coc_global_extensions = ['coc-pyright', 'coc-rls']

       " space-d jump to definition if coc is installed
       "nnoremap <silent><nowait> <space>d :call CocAction('jumpDefinition', v:    false)<CR>
       "nnoremap <silent><nowait> <space>r :call CocAction('jumpReferences', v:    false)<CR>
        if filereadable(expand(config_dir . "/.exp-coc-config"))
            exec "source " . config_dir . "/.exp-coc-config"
        endif
    
    " }
" }

" THEME APPEARANCE
" {
    " dark or light
    if filereadable(expand(g:vim_dir . '.light_theme.signal'))
        let g:theme_color = 'light'              
    else
        let g:theme_color = 'dark'              
    endif

    " what to use for dark theme
    let g:dark_theme = ''               
    let g:airline_dark_theme = "deus"               

    " what to use for light theme
    let g:light_theme = ''              
    let g:airline_light_theme = "silver"               

    " transparent backgroud for supported terminal emulator
    if filereadable(expand(g:vim_dir . '.transparent_theme.signal'))
        let g:transparent_theme = v:true     
    else
        let g:transparent_theme = v:false     
    endif

    " Change bottom airline/lualine theme
    " Currently only support airline
    function! SetAirlineTheme(theme)
        if has('nvim') && g:vim_version >= 0.5
            execute('AirlineTheme ' . a:theme)
        else
            execute('AirlineTheme ' . a:theme)
        endif
    endfunction

    function! EnableTransparent()
        if g:vim_type == 'nvim' && g:vim_version > 0.5
            :TransparentEnable
        elseif g:theme_color == 'dark'
            let g:afterglow_inherit_background=1
            execute("colorscheme " . g:dark_theme)
        elseif g:theme_color == 'light'
            let g:PaperColor_Theme_Options = {
            \   'theme': {
            \       'default.light': {
            \           'transparent_background': 1
            \        }
            \   }
            \ }
            execute("colorscheme " . g:light_theme)
        endif
    endfunction

    function! DisableTransparent()
        if g:vim_type == 'nvim' && g:vim_version > 0.5
            :TransparentDisable
        elseif g:theme_color == 'dark'
            let g:afterglow_inherit_background=0
            execute("colorscheme " . g:dark_theme)
        elseif g:theme_color == 'light'
            let g:PaperColor_Theme_Options = {
            \   'theme': {
            \       'default.light': {
            \           'transparent_background': 0
            \        }
            \   }
            \ }
            execute("colorscheme " . g:light_theme)
        endif
    endfunction

    " ToggleTransparent background
    " only works in dark theme
    function! ToggleTransparent()
        if g:transparent_theme == v:true
            call DisableTransparent()
            let g:transparent_theme = v:false     
            if filereadable(expand(g:vim_dir . '.transparent_theme.signal'))
                call delete(expand(g:vim_dir . ".transparent_theme.signal"))
            endif
        else
            call EnableTransparent()
            let g:transparent_theme = v:true     
            call system("touch " . g:vim_dir . ".transparent_theme.signal")
        endif
    endfunction

    noremap <leader>tb :call ToggleTransparent()<CR>

    " {
    " nvim only theme
    
        " has('nvim') check if it's running on nvim rather than 
        " having neovim on your machine 
        "if isdirectory(expand(plugin_dir . "/github-nvim-theme")) && has('nvim') && g:vim_version >= 0.5
        "    let g:github_function_style = "italic"
        "    "let g:github_sidebars = ["qf", "vista_kind", "terminal", "packer"]
        "    
        "    let g:dark_theme = 'github_dark'
        "    let g:light_theme = 'github_light'
        if isdirectory(expand(plugin_dir . "/nightfox.nvim")) && has('nvim') && g:vim_version >= 0.5
            "let g:dark_theme = 'Nightfox'
            let g:dark_theme = 'Nordfox'
            let g:light_theme = 'Dayfox'

    " }    
     
    " {
    " vim theme 
        elseif isdirectory(expand(plugin_dir . "/vim-afterglow")) 
            if isdirectory(expand(plugin_dir . "/papercolor-theme")) 
                let g:light_theme = 'PaperColor'              
            endif
            "let g:afterglow_inherit_background=1
            let g:dark_theme = 'afterglow'
        endif
   
    " }    
   
    if g:theme_color == 'dark'
        set background=dark
        execute("colorscheme " . g:dark_theme)
        let g:airline_theme=g:airline_dark_theme
    else
        set background=light
        execute("colorscheme " . g:light_theme)
        let g:airline_theme=g:airline_light_theme
    endif

    " since in .vimrc we cannot call plugin function as they
    " are not loaded (:help startup)
    if g:transparent_theme
        if g:vim_type == 'nvim' && g:vim_version > 0.5
            let g:transparent_enabled = v:true
        else
            call EnableTransparent()
        endif
    else
        if g:vim_type == 'nvim' && g:vim_version > 0.5
            let g:transparent_enabled = v:false
        else
            call DisableTransparent()
        endif
    endif
        
    " Allow to trigger background
    function! ToggleBG()
        " Inversion
        if g:theme_color == "dark"
            set background=light
            execute("colorscheme " . g:light_theme)
            call SetAirlineTheme(g:airline_light_theme)
            let g:theme_color = 'light'
            call system("touch " . g:vim_dir . ".light_theme.signal")
        else
            set background=dark
            execute("colorscheme " . g:dark_theme)
            call SetAirlineTheme(g:airline_dark_theme)
            let g:theme_color = 'dark'
            " for saving theme state
            if filereadable(expand(g:vim_dir . '.light_theme.signal'))
                call delete(expand(g:vim_dir . ".light_theme.signal"))
            endif
        endif

        if g:transparent_theme
            call EnableTransparent()
        else
            call DisableTransparent()
        endif
    endfunction

    noremap <leader>bg :call ToggleBG()<CR>
" }