-- function Leave_snippet()
--   if
--       ((vim.v.event.old_mode == 's' and vim.v.event.new_mode == 'n') or vim.v.event.old_mode == 'i')
--       and require('luasnip').session.current_nodes[vim.api.nvim_get_current_buf()]
--       and not require('luasnip').session.jump_active
--   then
--     require('luasnip').unlink_current()
--   end
-- end
--
-- vim.api.nvim_command [[
--     autocmd ModeChanged * lua Leave_snippet()
-- ]]
--
-- vim.cmd 'highlight! link CmpPmenu         Pmenu'
-- vim.cmd 'highlight! link CmpPmenuBorder   Pmenu'
-- vim.cmd 'highlight! CmpPmenu         guibg=#282828'
-- vim.cmd 'highlight! CmpPmenuBorder   guifg=#615750'

return {
  {
    'hrsh7th/nvim-cmp',
    event = 'InsertEnter',
    dependencies = {
      -- Snippet Engine & its associated nvim-cmp source
      {
        'L3MON4D3/LuaSnip',
        build = (function()
          -- Build Step is needed for regex support in snippets.
          -- This step is not supported in many windows environments.
          -- Remove the below condition to re-enable on windows.
          if vim.fn.has 'win32' == 1 or vim.fn.executable 'make' == 0 then
            return
          end
          return 'make install_jsregexp'
        end)(),
        dependencies = {
          -- `friendly-snippets` contains a variety of premade snippets.
          --    See the README about individual language/framework/plugin snippets:
          --    https://github.com/rafamadriz/friendly-snippets
          {
            'rafamadriz/friendly-snippets',
            config = function()
              require('luasnip.loaders.from_vscode').lazy_load()
            end,
          },
        },
      },
      'saadparwaiz1/cmp_luasnip',

      -- Adds other completion capabilities.
      --  nvim-cmp does not ship with all sources by default. They are split
      --  into multiple repos for maintenance purposes.
      'hrsh7th/cmp-nvim-lsp',
      'hrsh7th/cmp-path',
    },
    config = function()
      local cmp = require 'cmp'
      local luasnip = require 'luasnip'
      luasnip.config.setup {}

      local border = require('utils').nvim_open_win_border
      local highlight_opts = 'Normal:CmpPmenu,FloatBorder:CmpPmenuBorder,CursorLine:PmenuSel,Search:None'

      cmp.setup {
        snippet = {
          expand = function(args)
            luasnip.lsp_expand(args.body)
          end,
        },
        completion = { completeopt = 'menu,menuone,noinsert' },

        mapping = cmp.mapping.preset.insert {
          ['<C-n>'] = cmp.mapping.select_next_item(),
          ['<C-p>'] = cmp.mapping.select_prev_item(),
          ['<C-b>'] = cmp.mapping.scroll_docs(-4),
          ['<C-f>'] = cmp.mapping.scroll_docs(4),
          ['<C-y>'] = cmp.mapping.confirm { select = true },
          ['<C-Space>'] = cmp.mapping.complete {},

          ['<C-l>'] = cmp.mapping(function()
            if luasnip.expand_or_locally_jumpable() then
              luasnip.expand_or_jump()
            end
          end, { 'i', 's' }),
          ['<C-h>'] = cmp.mapping(function()
            if luasnip.locally_jumpable(-1) then
              luasnip.jump(-1)
            end
          end, { 'i', 's' }),
        },
        sources = {
          {
            name = 'lazydev',
            -- set group index to 0 to skip loading LuaLS completions as lazydev recommends it
            group_index = 0,
          },
          { name = 'nvim_lsp' },
          { name = 'luasnip' },
          { name = 'path' },
          -- { name = 'crates' },
        },
        window = {
          completion = {
            border = border 'CmpBorder',
            side_padding = 1,
            winhighlight = highlight_opts,
          },
          documentation = {
            border = border 'CmpDocBorder',
            winhighlight = highlight_opts,
          },
        },
      }
    end,
  },
}