local M = {
  "hrsh7th/nvim-cmp",
  event = "InsertEnter",
  dependencies = {
    {
      "hrsh7th/cmp-nvim-lsp",
      event = "InsertEnter",
    },
    {
      "hrsh7th/cmp-emoji",
      event = "InsertEnter",
    },
    {
      "hrsh7th/cmp-buffer",
      event = "InsertEnter",
    },
    {
      "hrsh7th/cmp-path",
      event = "InsertEnter",
    },
    {
      "hrsh7th/cmp-cmdline",
      event = "InsertEnter",
    },
    {
      "saadparwaiz1/cmp_luasnip",
      event = "InsertEnter",
    },
    {
      "L3MON4D3/LuaSnip",
      event = "InsertEnter",
      dependencies = {
        "rafamadriz/friendly-snippets",
      },
    },
    {
      "hrsh7th/cmp-nvim-lua",
    },
  },
}

-- copretator that  always sprts
local function prefer_kind_a_over_b(a, b)
  return function(e1, e2)
    if e1:get_kind() == a and e2:get_kind() == b then
      return true
    end
    if e2:get_kind() == a and e1:get_kind() == b then
      return false
    end
  end
end

function M.config()
  vim.api.nvim_set_hl(0, "CmpItemKindCopilot", { fg = "#6CC644" })
  vim.api.nvim_set_hl(0, "CmpItemKindTabnine", { fg = "#CA42F0" })
  vim.api.nvim_set_hl(0, "CmpItemKindCrate", { fg = "#F64D00" })
  vim.api.nvim_set_hl(0, "CmpItemKindEmoji", { fg = "#FDE030" })

  local cmp = require "cmp"
  local luasnip = require "luasnip"
  local types = require "cmp.types"
  local CompletionItemKind = types.lsp.CompletionItemKind

  require("luasnip/loaders/from_vscode").lazy_load()
  require("luasnip").filetype_extend("typescriptreact", { "html" })

  local check_backspace = function()
    local col = vim.fn.col "." - 1
    return col == 0 or vim.fn.getline("."):sub(col, col):match "%s"
  end

  local icons = require "user.icons"

  cmp.setup {
    sorting = {
      comparators = {
        cmp.config.compare.exact,
        cmp.config.compare.kind,
        prefer_kind_a_over_b(CompletionItemKind.Field, CompletionItemKind.Method),
        cmp.config.compare.recently_used,
        cmp.config.compare.score,
      }
    },
    snippet = {
      expand = function(args)
        luasnip.lsp_expand(args.body) -- For `luasnip` users.
      end,
    },
    mapping = cmp.mapping.preset.insert {
      ["<C-k>"] = cmp.mapping(cmp.mapping.select_prev_item(), { "i", "c" }),
      ["<C-j>"] = cmp.mapping(cmp.mapping.select_next_item(), { "i", "c" }),
      ["<Down>"] = cmp.mapping(cmp.mapping.select_next_item(), { "i", "c" }),
      ["<Up>"] = cmp.mapping(cmp.mapping.select_prev_item(), { "i", "c" }),
      ["<C-b>"] = cmp.mapping(cmp.mapping.scroll_docs(-1), { "i", "c" }),
      ["<C-f>"] = cmp.mapping(cmp.mapping.scroll_docs(1), { "i", "c" }),
      ["<C-Space>"] = cmp.mapping(cmp.mapping.complete(), { "i", "c" }),
      ["<C-e>"] = cmp.mapping {
        i = cmp.mapping.abort(),
        c = cmp.mapping.close(),
      },
      -- Accept currently selected item. If none selected, `select` first item.
      -- Set `select` to `false` to only confirm explicitly selected items.
      ["<CR>"] = cmp.mapping.confirm { select = true },
      ["<Tab>"] = cmp.mapping(function(fallback)
        if cmp.visible() then
          cmp.select_next_item()
        elseif luasnip.expandable() then
          luasnip.expand()
        elseif luasnip.expand_or_jumpable() then
          luasnip.expand_or_jump()
        elseif check_backspace() then
          fallback()
        else
          fallback()
        end
      end, {
        "i",
        "s",
      }),
      ["<S-Tab>"] = cmp.mapping(function(fallback)
        if cmp.visible() then
          cmp.select_prev_item()
        elseif luasnip.jumpable(-1) then
          luasnip.jump(-1)
        else
          fallback()
        end
      end, {
        "i",
        "s",
      }),
    },
    formatting = {
      fields = { "kind", "abbr", "menu" },
      format = function(entry, vim_item)
        vim_item.kind = icons.kind[vim_item.kind]
        vim_item.menu = ({
          nvim_lsp = "",
          nvim_lua = "",
          luasnip = "",
          buffer = "",
          path = "",
          emoji = "",
        })[entry.source.name]
        return vim_item
      end,
    },
    sources = {
      {
        name = "nvim_lsp",
        entry_filter = function(entry, ctx)
          local kind = require("cmp.types.lsp").CompletionItemKind[entry:get_kind()]
          if kind == "Snippet" and ctx.prev_context.filetype == "java" then
            return false
          end

          if ctx.prev_context.filetype == "markdown" then
            return true
          end

          if kind == "Text" then
            return false
          end

          return true
        end,
      },
      { name = "luasnip" },
      { name = "nvim_lua" },
      { name = "buffer" },
      { name = "path" },
      { name = "emoji" },
      { name = "treesitter" },
    },
    confirm_opts = {
      behavior = cmp.ConfirmBehavior.Replace,
      select = false,
    },
    window = {
      completion = {
        border = "rounded",
        winhighlight = "Normal:Pmenu,CursorLine:PmenuSel,FloatBorder:FloatBorder,Search:None",
        col_offset = -3,
        side_padding = 1,
        scrollbar = false,
        scrolloff = 8,
      },
      documentation = {
        border = "rounded",
        winhighlight = "Normal:Pmenu,FloatBorder:FloatBorder,Search:None",
      },
    },
    experimental = {
      ghost_text = false,
    },
  }

  pcall(function()
    local function on_confirm_done(...)
      require("nvim-autopairs.completion.cmp").on_confirm_done()(...)
    end
    require("cmp").event:off("confirm_done", on_confirm_done)
    require("cmp").event:on("confirm_done", on_confirm_done)
  end)
end

return M
