set nocompatible            " disable compatibility to old-time vi
set showmatch               " show matching 
set ignorecase              " case insensitive 
set mouse=v                 " middle-click paste with 
set hlsearch                " highlight search 
set incsearch               " incremental search
set tabstop=4               " number of columns occupied by a tab 
set softtabstop=4           " see multiple spaces as tabstops so <BS> does the right thing
set expandtab               " converts tabs to white space
set shiftwidth=4            " width for autoindents
set autoindent              " indent a new line the same amount as the line just typed
set number                  " add line numbers
set wildmode=longest,list   " get bash-like tab completions
set cc=80                  " set an 80 column border for good coding style
filetype plugin indent on   "allow auto-indenting depending on file type
syntax on                   " syntax highlighting
set mouse=a                 " enable mouse click
set clipboard=unnamedplus   " using system clipboard
filetype plugin on
" set cursorline              " highlight current cursorline
set ttyfast                 " Speed up scrolling in Vim
" set spell                 " enable spell check (may need to download language package)
" set noswapfile            " disable creating swap file
" set backupdir=~/.cache/vim " Directory to store backup files.
    
" vim-plug -> 
call plug#begin('~/.config/nvim/plugged')

" Collection of common configurations for the Nvim LSP client
Plug 'neovim/nvim-lspconfig'

" Completion framework
Plug 'hrsh7th/nvim-cmp'

" LSP completion source for nvim-cmp
Plug 'hrsh7th/cmp-nvim-lsp'

" Snippet completion source for nvim-cmp
Plug 'hrsh7th/cmp-vsnip'

" Other usefull completion sources
Plug 'hrsh7th/cmp-path'
Plug 'hrsh7th/cmp-buffer'

" See hrsh7th's other plugins for more completion sources!

" To enable more of the features of rust-analyzer, such as inlay hints and more!
Plug 'simrat39/rust-tools.nvim'

" Snippet engine
Plug 'hrsh7th/vim-vsnip'

" Fuzzy finder
" Optional
Plug 'nvim-lua/popup.nvim'
Plug 'nvim-lua/plenary.nvim'
Plug 'nvim-telescope/telescope.nvim'
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""


" Folder Structure
Plug 'kyazdani42/nvim-web-devicons' " for file icons
Plug 'kyazdani42/nvim-tree.lua'

" g: commands
let g:nvim_tree_quit_on_open = 1 "0 by default, closes the tree when you open a file
let g:nvim_tree_indent_markers = 1 "0 by default, this option shows indent markers when folders are open
let g:nvim_tree_git_hl = 1 "0 by default, will enable file highlight for git attributes (can be used without the icons).
let g:nvim_tree_highlight_opened_files = 1 "0 by default, will enable folder and file icon highlight for opened files/directories.
let g:nvim_tree_root_folder_modifier = ':~' "This is the default. See :help filename-modifiers for more options
let g:nvim_tree_add_trailing = 1 "0 by default, append a trailing slash to folder names
let g:nvim_tree_group_empty = 1 " 0 by default, compact folders that only contain a single folder into one node in the file tree
let g:nvim_tree_disable_window_picker = 1 "0 by default, will disable the window picker.
let g:nvim_tree_icon_padding = ' ' "one space by default, used for rendering the space between the icon and the filename. Use with caution, it could break rendering if you set an empty string depending on your font.
let g:nvim_tree_symlink_arrow = ' >> ' " defaults to ' ➛ '. used as a separator between symlinks' source and target.
let g:nvim_tree_respect_buf_cwd = 1 "0 by default, will change cwd of nvim-tree to that of new buffer's when opening nvim-tree.
let g:nvim_tree_create_in_closed_folder = 0 "1 by default, When creating files, sets the path of a file when cursor is on a closed folder to the parent folder when 0, and inside the folder when 1.
let g:nvim_tree_refresh_wait = 500 "1000 by default, control how often the tree can be refreshed, 1000 means the tree can be refresh once per 1000ms.
let g:nvim_tree_window_picker_exclude = {
    \   'filetype': [
    \     'notify',
    \     'packer',
    \     'qf'
    \   ],
    \   'buftype': [
    \     'terminal'
    \   ]
    \ }
" Dictionary of buffer option names mapped to a list of option values that
" indicates to the window picker that the buffer's window should not be
" selectable.
let g:nvim_tree_special_files = { 'README.md': 1, 'Makefile': 1, 'MAKEFILE': 1 } " List of filenames that gets highlighted with NvimTreeSpecialFile
let g:nvim_tree_show_icons = {
    \ 'git': 1,
    \ 'folders': 0,
    \ 'files': 0,
    \ 'folder_arrows': 0,
    \ }
"If 0, do not show the icons for one of 'git' 'folder' and 'files'
"1 by default, notice that if 'files' is 1, it will only display
"if nvim-web-devicons is installed and on your runtimepath.
"if folder is 1, you can also tell folder_arrows 1 to show small arrows next to the folder icons.
"but this will not work when you set indent_markers (because of UI conflict)

" default will show icon by default if no icon is provided
" default shows no icon by default
let g:nvim_tree_icons = {
    \ 'default': '',
    \ 'symlink': '',
    \ 'git': {
    \   'unstaged': "✗",
    \   'staged': "✓",
    \   'unmerged': "",
    \   'renamed': "➜",
    \   'untracked': "★",
    \   'deleted': "",
    \   'ignored': "◌"
    \   },
    \ 'folder': {
    \   'arrow_open': "",
    \   'arrow_closed': "",
    \   'default': "",
    \   'open': "",
    \   'empty': "",
    \   'empty_open': "",
    \   'symlink': "",
    \   'symlink_open': "",
    \   }
    \ }

" Lua require"nvim-tree" & setup

" Key remappings etc.
nnoremap <C-n> :NvimTreeToggle<CR>
nnoremap <leader>r :NvimTreeRefresh<CR>
nnoremap <leader>n :NvimTreeFindFile<CR>
" NvimTreeOpen, NvimTreeClose, NvimTreeFocus, NvimTreeFindFileToggle, and NvimTreeResize are also available if you need them

set termguicolors " this variable must be enabled for colors to be applied properly

" a list of groups can be found at `:help nvim_tree_highlight`
highlight NvimTreeFolderIcon guibg=blue

"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" Color scheme used in the GIFs!
" Plug 'arcticicestudio/nord-vim'

call plug#end()

" Rest of configuration for Rust ->

" Set completeopt to have a better completion experience
" :help completeopt
" menuone: popup even when there's only one match
" noinsert: Do not insert text until a selection is made
" noselect: Do not select, force user to select one from the menu
set completeopt=menuone,noinsert,noselect

" Avoid showing extra messages when using completion
set shortmess+=c

" Configure LSP through rust-tools.nvim plugin.
" rust-tools will configure and enable certain LSP features for us.
" See https://github.com/simrat39/rust-tools.nvim#configuration
lua <<EOF
local nvim_lsp = require'lspconfig'

local opts = {
    tools = { -- rust-tools options
        autoSetHints = true,
        hover_with_actions = true,
        inlay_hints = {
            show_parameter_hints = false,
            parameter_hints_prefix = "",
            other_hints_prefix = "",
        },
    },

    -- all the opts to send to nvim-lspconfig
    -- these override the defaults set by rust-tools.nvim
    -- see https://github.com/neovim/nvim-lspconfig/blob/master/CONFIG.md#rust_analyzer
    server = {
        -- on_attach is a callback called when the language server attachs to the buffer
        -- on_attach = on_attach,
        settings = {
            -- to enable rust-analyzer settings visit:
            -- https://github.com/rust-analyzer/rust-analyzer/blob/master/docs/user/generated_config.adoc
            ["rust-analyzer"] = {
                -- enable clippy on save
                checkOnSave = {
                    command = "clippy"
                },
            }
        }
    },
}

require('rust-tools').setup(opts)
EOF

" Setup Completion
" See https://github.com/hrsh7th/nvim-cmp#basic-configuration
lua <<EOF
local cmp = require'cmp'
cmp.setup({
  -- Enable LSP snippets
  snippet = {
    expand = function(args)
        vim.fn["vsnip#anonymous"](args.body)
    end,
  },
  mapping = {
    ['<C-p>'] = cmp.mapping.select_prev_item(),
    ['<C-n>'] = cmp.mapping.select_next_item(),
    -- Add tab support
    ['<S-Tab>'] = cmp.mapping.select_prev_item(),
    ['<Tab>'] = cmp.mapping.select_next_item(),
    ['<C-d>'] = cmp.mapping.scroll_docs(-4),
    ['<C-f>'] = cmp.mapping.scroll_docs(4),
    ['<C-Space>'] = cmp.mapping.complete(),
    ['<C-e>'] = cmp.mapping.close(),
    ['<CR>'] = cmp.mapping.confirm({
      behavior = cmp.ConfirmBehavior.Insert,
      select = true,
    })
  },

  -- Installed sources
  sources = {
    { name = 'nvim_lsp' },
    { name = 'vsnip' },
    { name = 'path' },
    { name = 'buffer' },
  },
})
EOF