local cmp_status_ok, cmp = pcall(require, "cmp")
if not cmp_status_ok then
  return
end

local snip_status_ok, luasnip = pcall(require, "luasnip")
if not snip_status_ok then
  return
end

require("luasnip/loaders/from_vscode").lazy_load()

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

local dict = vim.fn.expand("$HOME/.dotfiles/nvim/10k.txt")

-- `:` cmdline setup.
cmp.setup.cmdline(":", {
  mapping = cmp.mapping.preset.cmdline(),
  sources = cmp.config.sources({
    { name = "path" },
  }, {
    {
      name = "cmdline",
      option = {
        -- ignore_cmds = { "Man", "!" },
        ignore_cmds = {},
      },
    },
  }),
})

-- `/` cmdline setup.
cmp.setup.cmdline("/", {
  mapping = cmp.mapping.preset.cmdline(),
  sources = {
    { name = "buffer" },
  },
})

cmp.setup({
  snippet = {
    expand = function(args)
      luasnip.lsp_expand(args.body) -- For `luasnip` users.
    end,
  },
  mapping = {
    -- 实际上测试，这些键位其实都没用
    -- ["<C-p>"] = cmp.mapping.select_prev_item(),
    -- ["<C-n>"] = cmp.mapping.select_next_item(),
    -- ["<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-y>"] = cmp.config.disable, -- Specify `cmp.config.disable` if you want to remove the default `<C-y>` mapping.
    -- ["<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",
    }),
  },
  sources = {
    { name = "nvim_lsp" },
    { name = "luasnip" },
    { name = "buffer" },
    { name = "path" },
    { name = "emoji" },
    { name = 'orgmode' },
    {
      name = "look",
      keyword_length = 2,
      option = {
        convert_case = true,
        loud = true,
        dict = dict,
      },
    },
  },
  confirm_opts = {
    behavior = cmp.ConfirmBehavior.Replace,
    select = false,
  },
  window = {
    documentation = {
      border = { "╭", "─", "╮", "│", "╯", "─", "╰", "│" },
    },
  },
  experimental = {
    ghost_text = false,
  },
})
