" required for nvim-tree plugin
let g:loaded_netrw = 1
let g:loaded_netrwPlugin = 1

" https://vimhelp.org/map.txt.html#modifyOtherKeys
" I'm not sure that this really helps anything
let &t_TI = "\<Esc>[>4;2m"
let &t_TE = "\<Esc>[>4;m"

lua <<
vim.pack.add({
  'https://github.com/nvim-tree/nvim-web-devicons', -- optional
  'https://github.com/nvim-tree/nvim-tree.lua',

  'https://github.com/nvim-treesitter/nvim-treesitter',

  'https://github.com/Mofiqul/dracula.nvim',

  'https://github.com/nvim-lualine/lualine.nvim',

  'https://github.com/akinsho/bufferline.nvim',

  'https://github.com/nvim-lua/plenary.nvim',
  'https://github.com/nvim-telescope/telescope.nvim',

  -- For managing lsps
  'https://github.com/williamboman/mason.nvim',

  -- Delete, change and add surrounding pairs
  'https://github.com/kylechui/nvim-surround',

  -- Indent line
  'https://github.com/lukas-reineke/indent-blankline.nvim',

  'https://github.com/airblade/vim-gitgutter',

  -- Highlight syntax and support indent for MoonScript
  'https://github.com/leafo/moonscript-vim',
}, {
  confirm = false
})
.

colorscheme dracula
set termguicolors

" Open a terminal in the current file's directory
command Cdot normal! :lcd%:h<CR>:terminal<CR>A<CR>

" Very basic "autocompletion". See `h compl-autocomplete`
lua <<
local triggers = {"."}
vim.api.nvim_create_autocmd("InsertCharPre", {
  -- buffer = vim.api.nvim_get_current_buf(),
  pattern = {'*'},
  callback = function()
    if vim.fn.pumvisible() == 1 or vim.fn.state("m") == "m" then
      return
    end
    local char = vim.v.char
    if vim.list_contains(triggers, char) then
      local key = vim.keycode("<C-x><C-n><C-p>")
      vim.api.nvim_feedkeys(key, "m", false)
    end
  end
})

-- vim.api.nvim_create_autocmd("WinEnter", {
--   pattern = {'*'},
--   callback = function()
--     vim.print(vim.api.nvim_win_get_config(0))
--     -- vim.print("HELLO")
--   end
-- })
.

lua <<
local function nvim_tree_custom_mappings(bufnr)
  local api = require('nvim-tree.api')

  local function opts(desc)
    return {
      desc = "nvim-tree: " .. desc,
      buffer = bufnr,
      noremap = true,
      silent = true,
      nowait = true
    }
  end

  local function change_directory()
    local node = api.tree.get_node_under_cursor()

    if node.name == '..' then
      vim.cmd("cd " .. vim.fn.getcwd())
    elseif node.nodes ~= nil then
      vim.cmd("cd " .. node.absolute_path)
    end
  end

  api.config.mappings.default_on_attach(bufnr)

  vim.keymap.set('n', '<C-S-]>', change_directory, opts('Global CD'))
end

require('nvim-tree').setup({
  on_attach = nvim_tree_custom_mappings,
  tab = {sync = {open = true}},
  sync_root_with_cwd = true,
  respect_buf_cwd = true,
  update_focused_file = {
    enable = true,
    update_root = false
  },
  live_filter = {
    always_show_folders = false
  }
})
.

lua <<
vim.g.VM_set_statusline = 0
vim.g.VM_silent_exit = 1

local function vm_mode()
  return vim.iter(string.gmatch(vim.fn['vm#themes#statusline'](), "%S+")):nth(2)
end

local function vm_status()
  return vim.fn['VMInfos']().status or ''
end

require('lualine').setup({
  options = {
    theme = 'dracula-nvim',
  },
  -- sections = {
  --   lualine_a = {{'mode', fmt = function(mode) return vm_mode() or mode end}},
  --   lualine_b = {vm_status, 'branch', 'diff', 'diagnostics'},
  -- },
  extensions = {
    'nvim-tree'
  },
})

vim.api.nvim_create_autocmd({'CmdlineEnter'}, {
  pattern = {'@'},
  callback = function(ev)
    if vim.b.visual_multi then
      local delay = 0
      vim.defer_fn(function() vim.cmd('execute "redrawstatus"') end, delay)
    end
  end
})
.

lua require('bufferline').setup({options = {numbers = function(opts) return string.format('%s', opts.raise(opts.id)) end}})

lua <<
require('telescope').setup({
  defaults = {
    mappings = {
      i = {
        ['<C-x>'] = false,
        ['<C-s>'] = 'select_horizontal'
      },
      n = {
        ['<C-x>'] = false,
        ['<C-s>'] = 'select_horizontal'
      }
    }
  },
  pickers = {
    buffers = {
      mappings = {
        i = {
          ['<C-d>'] = require('telescope.actions').delete_buffer
        },
        n = {
          ['<C-d>'] = require('telescope.actions').delete_buffer
        }
      }
    }
  }
})
.

lua <<
vim.lsp.config['lua_ls'] = {
  cmd = { 'lua-language-server' },
  filetypes = { 'lua' },
  root_markers = { '.luarc.json', '.git' },
  settings = { Lua = { diagnostics = { globals = { "vim" } } } }
}
vim.lsp.enable('lua_ls')
.

lua require("mason").setup()
lua require('nvim-surround').setup()

lua <<
local hooks = require('ibl.hooks')

hooks.register(hooks.type.HIGHLIGHT_SETUP, function()
  vim.api.nvim_set_hl(0, "IblScope", {fg = '#454545'})
end)

require('ibl').setup({scope = {char = "▎"}, indent = {char ="▏"}}) -- ▏▎┊▍▎┋┃⦚
.

" lua require("helpers")

"https://github.com/editorconfig/editorconfig-vim/blob/8b7da79e9daee7a3f3a8d4fe29886b9756305aff/plugin/editorconfig.vim#L594-L605
function! s:TrimTrailingWhitespace()
  " Called from within a buffer-specific autocmd, so we can use '%'
  if getbufvar('%', '&modifiable') && &ft != 'markdown'
    " don't lose user position when trimming trailing whitespace
    let s:view = winsaveview()
    try
      silent! keeppatterns keepjumps %s/\s\+$//e
    finally
      call winrestview(s:view)
    endtry
  endif
endfunction

autocmd BufWritePre * call s:TrimTrailingWhitespace()

function! LineHome()
  let x = col('.')
  execute "normal ^"
  if x == col('.')
    execute "normal 0"
  endif
  return ""
endfunction

" Use :emenu <Tab> to see menu list from command prompt
source $VIMRUNTIME/menu.vim

"set guifont=IosevkaTerm\ Nerd\ Font\ Mono:h12
set guifont=NotoSansM\ Nerd\ Font\ Mono:h12
set number
set title

set expandtab
set shiftwidth=2
set softtabstop=2

set noautoindent
set nosmartindent
set nocindent

set foldmethod=expr
"set foldexpr=nvim_treesitter#foldexpr()
set foldexpr=v:lua.vim.treesitter.foldexpr()
set foldlevelstart=99

" yank, delete, and change operations copy into both + and *, put operations paste from +
"set clipboard=unnamed,unnamedplus

" Highlights item mouse hovers over in popup menu
set mousemoveevent

" Number of screen lines to use for the command-line
set cmdheight=2

" Highlight column after 'textwidth'
set colorcolumn=+1
autocmd WinEnter * set colorcolumn=+1
autocmd BufEnter * if &textwidth == 0 | set textwidth=79 | endif

set selectmode=key
set keymodel=startsel

set conceallevel=0

let g:neovide_text_gamma = 0.8
let g:neovide_text_contrast = 0.1

" F1 to close help window if current buffer is a help window
lua <<
vim.keymap.set('n', '<F1>', function()
  return vim.bo.ft == 'help' and '<Cmd>bw<CR>' or '<Help>'
end, {expr = true, remap = false})
.

"NvimTreeOpen
" Move cursor to previous window after opening NvimTree
wincmd p
" Move cursor from NvimTree to empty buffer on start
autocmd VimEnter * wincmd 2w

" Save
nmap <C-s> :w<CR>
imap <expr> <C-s> '<ESC>:w<CR>' . (col('.') == 1 ? '' : 'l')
" Copy
vmap <C-S-C> "+y
" Copy from visual-multi selection and return to normal mode
nmap <C-S-C> "+y<ESC>
" call nvim_set_keymap('', '<C-v>', '+p<CR>', {'noremap': v:true, 'silent': v:true})
" call nvim_set_keymap('!', '<C-v>', '<C-R>+', {'noremap': v:true, 'silent': v:true})
" call nvim_set_keymap('t', '<C-v>', '<C-R>+', {'noremap': v:true, 'silent': v:true})
" call nvim_set_keymap('v', '<C-v>', '<C-R>+', {'noremap': v:true, 'silent': v:true})

" Edit/source init.vim
nnoremap <Leader>ev :edit $MYVIMRC<CR>
nnoremap <Leader>sv :source $MYVIMRC<CR>

nnoremap <Leader>q :q<CR>
nnoremap <Leader>t :tabnew<CR>
" Delete current buffer and view another open buffer in current window
nnoremap <silent> <Leader>bd :bn<Bar>:bd #<CR>
nnoremap <silent> <Leader>w :set wrap!<CR>:set wrap?<CR>

" Find files using Telescope command-line sugar.
nnoremap <Leader>ff <Cmd>Telescope find_files<CR>
nnoremap <Leader>fg <Cmd>Telescope live_grep<CR>
nnoremap <Leader>fb <Cmd>Telescope buffers<CR>
nnoremap <Leader>fh <Cmd>Telescope help_tags<CR>

" Stop highlighting
noremap <Leader><ESC> :noh<CR>

" Print current date
map <leader>D :put =strftime('%A, %B %d, %Y %I:%M %p %Z')<CR>

" Toggle file explorer
noremap <silent> <C-S-E> :lua require('nvim-tree.api').tree.toggle({focus = false})<CR>
inoremap <silent> <C-S-E> <C-o>:lua require('nvim-tree.api').tree.toggle({focus = false})<CR>

autocmd WinEnter * set nowrap
autocmd WinEnter * set linebreak

" Cycle buffers
nnoremap <silent> <S-PageUp> :BufferLineCyclePrev<CR>
nnoremap <silent> <S-PageDown> :BufferLineCycleNext<CR>
inoremap <silent> <S-PageUp> <ESC>:BufferLineCyclePrev<CR>i
inoremap <silent> <S-PageDown> <ESC>:BufferLineCycleNext<CR>i

" Move buffers
nnoremap <C-S-PageUp> :BufferLineMovePrev<CR>
nnoremap <C-S-PageDown> :BufferLineMoveNext<CR>

" Insert comment
lua vim.keymap.set('i', '<C-/>', '<ESC>gcc', { remap = true })
lua vim.keymap.set('n', '<C-/>', 'gcc', { remap = true })
lua vim.keymap.set('v', '<C-/>', 'gc',  { remap = true })

" For Alacritty
"lua vim.keymap.set('i', '<C-_>', '<ESC>gcc', { remap = true })
"lua vim.keymap.set('n', '<C-_>', 'gcc', { remap = true })
"lua vim.keymap.set('v', '<C-_>', 'gc',  { remap = true })

" Jump to first non-whitespace on line, or jump to begining of line if already at first non-whitespace
" https://superuser.com/questions/301109/move-cursor-to-beginning-of-non-whitespace-characters-in-a-line-in-vim/426147#426147
"map <silent><Home> :call LineHome()<CR>:echo<CR>
imap <silent><Home> <C-R>=LineHome()<CR>
" This next line is my own solution. Doesn't clear selection when used in visual mode.
" Reference: https://vi.stackexchange.com/questions/3296/count-the-number-of-whitespace-in-the-beginning-of-a-line
map <expr> <Home> col('.') == indent(line('.')) + 1 ? "0" : "^"

" Map <Esc> to exit terminal-mode
tnoremap <Esc> <C-\><C-n>

" Simulate i_CTRL-R in terminal-mode
tnoremap <expr> <C-R> '<C-\><C-N>"'.nr2char(getchar()).'pi'

" Use `ALT+{Left,Down,Right,Up}` to navigate windows from any mode
tnoremap <A-Left> <C-\><C-N><C-w>h
tnoremap <A-Down> <C-\><C-N><C-w>j
tnoremap <A-Up> <C-\><C-N><C-w>k
tnoremap <A-Right> <C-\><C-N><C-w>l
inoremap <A-Left> <C-\><C-N><C-w>h
inoremap <A-Down> <C-\><C-N><C-w>j
inoremap <A-Up> <C-\><C-N><C-w>k
inoremap <A-Right> <C-\><C-N><C-w>l
nnoremap <A-Left> <C-w>h
nnoremap <A-Down> <C-w>j
nnoremap <A-Up> <C-w>k
nnoremap <A-Right> <C-w>l

" Use `ALT+{h,j,k,l}` to navigate windows from any mode
tnoremap <A-h> <C-\><C-N><C-w>h
tnoremap <A-j> <C-\><C-N><C-w>j
tnoremap <A-k> <C-\><C-N><C-w>k
tnoremap <A-l> <C-\><C-N><C-w>l
inoremap <A-h> <C-\><C-N><C-w>h
inoremap <A-j> <C-\><C-N><C-w>j
inoremap <A-k> <C-\><C-N><C-w>k
inoremap <A-l> <C-\><C-N><C-w>l
nnoremap <A-h> <C-w>h
nnoremap <A-j> <C-w>j
nnoremap <A-k> <C-w>k
nnoremap <A-l> <C-w>l

if $TERM == 'alacritty'
  " Undo
  map <C-z> <Cmd>undo<CR>
  inoremap <C-z> <Cmd>undo<CR>
  " Redo
  "map ز <Cmd>redo<CR>
  "inoremap ز <Cmd>redo<CR>
  map <C-S-Z> <Cmd>redo<CR>
  inoremap <C-S-Z> <Cmd>redo<CR>
endif

cnoremap <expr> <Right> wildmenumode() ? "\<Down>" : "\<Right>"
cnoremap <expr> <Left> wildmenumode() ? "\<Up>" : "\<Left>"
cnoremap <expr> <Up> wildmenumode() ? "\<Left>" : "\<Up>"
cnoremap <expr> <Down> wildmenumode() ? "\<Right>" : "\<Down>"

:tnoremap <Esc> <C-\><C-n>