keymap = vim.api.nvim_set_keymap

-- Enable ColorScheme
vim.cmd[[colorscheme nord]]

-- Enable autopairs
require('nvim-autopairs').setup{}

-- Enable gitsigns
require('gitsigns').setup()

-- nvim-treesiter configuration: -- setup with all defaults
require'nvim-treesitter.configs'.setup{
    ensure_installed = {"bash", "c", "c_sharp", "cmake", "cpp", "css", "dockerfile", "go", "html", "http", "java", "javascript", "json", "json5", "jsonc", "lua", "make", "markdown", "perl", "php", "pug", "python", "regex", "ruby", "toml", "tsx", "typescript", "vim", "vue", "wgsl", "yaml",},
    highlight = { enable = 'true' }
}

-- To enable basic vim folding methods/expressions:
--
vim.opt.foldmethod = "expr"
vim.opt.foldexpr = "nvim_treesitter#foldexpr()"
--
local lsp_installer = require("nvim-lsp-installer")

lsp_installer.on_server_ready(function(server)
    local opts = {}

    -- This setup() function will take the provided server configuration and decorate it with the necessary properties
    -- before passing it onwards to lspconfig.
    -- Refer to https://github.com/neovim/nvim-lspconfig/blob/master/doc/server_configurations.md
    server:setup(opts)
end)
  -- Setup nvim-cmp.
  local cmp = require'cmp'

  cmp.setup({
     snippet = {
     -- REQUIRED - you must specify a snippet engine
     expand = function(args)
        vim.fn["UltiSnips#Anon"](args.body) -- For `ultisnips` users.
     end,
    },
    mapping = cmp.mapping.preset.insert({
      ['<C-b>'] = cmp.mapping.scroll_docs(-4),
      ['<C-f>'] = cmp.mapping.scroll_docs(4),
      ['<C-Space>'] = cmp.mapping.complete(),
      ['<C-e>'] = cmp.mapping.abort(),
      ['<CR>'] = cmp.mapping.confirm({ select = true }), -- Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.
    }),
    sources = cmp.config.sources({
      { name = 'nvim_lsp' },
      { name = 'buffer' },
      { name = 'ultisnips' },
    })
  })

  -- Set configuration for specific filetype.
  cmp.setup.filetype('gitcommit', {
    sources = cmp.config.sources({
      { name = 'cmp_git' }, -- You can specify the `cmp_git` source if you were installed it.
    }, {
      { name = 'buffer' },
    })
  })

  -- Use buffer source for `/` (if you enabled `native_menu`, this won't work anymore).
  cmp.setup.cmdline('/', {
    mapping = cmp.mapping.preset.cmdline(),
    sources = {
      { name = 'buffer' }
    }
  })

  -- Use cmdline & path source for ':' (if you enabled `native_menu`, this won't work anymore).
  cmp.setup.cmdline(':', {
    mapping = cmp.mapping.preset.cmdline(),
    sources = cmp.config.sources({
      { name = 'path' }
    }, {
      { name = 'cmdline' }
    })
  })

-- Setup lspconfig.
local capabilities = require('cmp_nvim_lsp').update_capabilities(vim.lsp.protocol.make_client_capabilities())
-- Replace <YOUR_LSP_SERVER> with each lsp server you've enabled.
local lspconfig =require'lspconfig'
-- Enable some language servers with the additional completion capabilities offered by nvim-cmp
local servers = { 'sumneko_lua', 'eslint', 'pyright', 'bashls', 'clangd', 'volar', 'zk', 'html' }
for _, lsp in ipairs(servers) do
   lspconfig[lsp].setup {
     capabilities = capabilities,
   }
end

-- Nvim_Tree configuration: -- setup with all defaults
-- each of these are documented in `:help nvim-tree.OPTION_NAME`
require'nvim-tree'.setup { -- BEGIN_DEFAULT_OPTS
  auto_reload_on_write = true,
  disable_netrw = false,
  hide_root_folder = false,
  hijack_cursor = false,
  hijack_netrw = true,
  hijack_unnamed_buffer_when_opening = false,
  ignore_buffer_on_setup = false,
  open_on_setup = true,
  open_on_setup_file = true,
  open_on_tab = false,
  sort_by = "name",
  update_cwd = false,
  view = {
    width = 25,
    height = 30,
    side = "right",
    preserve_window_proportions = true,
    number = false,
    relativenumber = false,
    signcolumn = "yes",
    mappings = {
      custom_only = false,
      list = {
          -- user mappings go here
      },
    },
  },
  renderer = {
    indent_markers = {
      enable = false,
      icons = {
        corner = "└ ",
        edge = "│ ",
        none = "  ",
      },
    },
    icons = {
      webdev_colors = true,
    },
  },
  hijack_directories = {
    enable = true,
    auto_open = true,
  },
  update_focused_file = {
    enable = false,
    update_cwd = false,
    ignore_list = {},
  },
  ignore_ft_on_setup = {},
  system_open = {
    cmd = nil,
    args = {},
  },
  diagnostics = {
    enable = false,
    show_on_dirs = false,
    icons = {
      hint = "",
      info = "",
      warning = "",
      error = "",
    },
  },
  filters = {
    dotfiles = false,
    custom = {},
    exclude = {},
  },
  git = {
    enable = true,
    ignore = true,
    timeout = 400,
  },
  actions = {
    use_system_clipboard = true,
    change_dir = {
      enable = true,
      global = false,
      restrict_above_cwd = false,
    },
    open_file = {
      quit_on_open = false,
      resize_window = false,
      window_picker = {
        enable = true,
        chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890",
        exclude = {
          filetype = { "notify", "packer", "qf", "diff", "fugitive", "fugitiveblame" },
          buftype = { "nofile", "terminal", "help" },
        },
      },
    },
  },
  trash = {
    cmd = "trash",
    require_confirm = true,
  },
  log = {
    enable = false,
    truncate = false,
    types = {
      all = false,
      config = false,
      copy_paste = false,
      diagnostics = false,
      git = false,
      profile = false,
    },
  },
} -- END_DEFAULT_OPTS for Nvim_Tree

-- Lua Line color configuration
require('lualine').setup({
options = { theme = 'nord' }
})

 -- Automatically closes Nvim tree if last window open
vim.cmd[[autocmd BufEnter * ++nested if winnr('$') == 1 && bufname() == 'NvimTree_' . tabpagenr() | quit | endif]]

-- vim-smoothie configuration
-- Use experimental features of vim-smoothie (gg and G)
vim.g.smoothie_experimental_mappings = 1

-- set colored brackets via rainbow
vim.g.rainbow_active = 1

-- Marks end of line, space, and trailing space characters
vim.opt.listchars:append({ eol = '↵', trail = '·', space = '·' })
vim.opt.list = true

-- enable AutoSave on start
vim.g.auto_save = 1

-- silence AutoSave messages
vim.g.auto_save_silent = 1

-- Create Default Mappings for NerdCommenter
vim.g.NERDCreateDefaultMappings= 1

-- Add spaces after NerdCommenter delimiters by default
vim.g.NERDSpaceDelims= 1

-- this variable must be enabled for colors to be applied properly
vim.g.termguicolors = true
vim.g.nosplitright = true

-- set relative number
vim.opt.number = true

vim.opt.cursorcolumn = true
-- vim.opt.cursor = true
vim.opt.mouse = 'a'
vim.opt.autoindent = true
vim.opt.smarttab = true
vim.opt.ignorecase = true
vim.opt.cindent = true
vim.opt.tabstop = 8
vim.opt.softtabstop = 0
vim.opt.shiftwidth = 4
-- always uses spaces instead of tab characters
vim.opt.expandtab = true

-- if hidden is not set, TextEdit might fail.
vim.opt.hidden = true
-- Set the height of the status line down at the bottom
vim.opt.cmdheight = 1
-- Set the amount of characters you get back from status/error messages
vim.opt.updatetime = 300
-- always show signcolumns
vim.opt.signcolumn = 'yes'

-- Fix Splitting
vim.opt.splitbelow = true
vim.opt.splitright = true

-- Vertically center document when entering Insert mode
vim.cmd[[autocmd InsertEnter * norm zz]]

--  Removes trailing spaces
vim.cmd[[function TrimWhiteSpace()
    %s/\s*$//
    ''
endfunction]]

--Removes trailing spaces on save
vim.cmd[[autocmd FileWritePre * call TrimWhiteSpace()]]
vim.cmd[[autocmd FileAppendPre * call TrimWhiteSpace()]]
vim.cmd[[autocmd FilterWritePre * call TrimWhiteSpace()]]
vim.cmd[[autocmd BufWritePre * call TrimWhiteSpace()]]

-- Enable Comments with Italics (below selected colorscheme)
vim.cmd[[highlight Comment cterm=italic gui=italic]]

-- do not close the markdown preview tab when switching to other buffers
-- vim.g.mkdp_auto_close = 0