local cmprg = vim.g.pcode_cmprg or false
local cmpcalc = vim.g.pcode_cmpcalc or false
local cmptag = vim.g.pcode_cmptag or false
local lspghost_text = vim.g.pcode_lspghost_text or false
local icons = require("user.icons").ui
local cmp_documentation = {
  border = icons.Border,
  winhighlight = "Normal:bg,FloatBorder:BorderBG,CursorLine:PmenuSel,Search:None",
  scrollbar = true,
}

return {
  { "hrsh7th/cmp-nvim-lsp", event = "InsertEnter", lazy = true },
  { "hrsh7th/cmp-buffer", event = "InsertEnter", lazy = true },
  { "hrsh7th/cmp-path", event = "InsertEnter", lazy = true },
  { "saadparwaiz1/cmp_luasnip", event = "InsertEnter", lazy = true },
  { "hrsh7th/cmp-nvim-lua", event = "InsertEnter", lazy = true },
  { "lukas-reineke/cmp-rg", lazy = true, enabled = cmprg }, -- experimental
  { "hrsh7th/cmp-calc", lazy = true, enabled = cmpcalc }, -- experimental
  { "quangnguyen30192/cmp-nvim-tags", lazy = true, enabled = cmptag }, -- experimental
  {
    "hrsh7th/nvim-cmp",
    lazy = true,
    version = false, -- last release is way too old
    event = "InsertEnter",
    opts = function()
      local cmp = require "cmp"
      local luasnip = require "luasnip"

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

      return {
        completion = {
          completeopt = "menu,menuone,noinsert",
        },
        snippet = {
          expand = function(args)
            require("luasnip").lsp_expand(args.body)
          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.
          ["<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 = cmp.config.sources {
          { name = "nvim_lsp" },
          { name = "luasnip" },
          { name = "buffer" },
          { name = "path" },
          { name = "nvim_lua" },
          { name = "rg" }, -- experimental
          { name = "calc" }, -- experimental
          { name = "tags" }, --experimental
        },
        formatting = {
          fields = { "kind", "abbr", "menu" },
          format = function(entry, vim_item)
            vim_item.kind = string.format("%s", require("user.icons")["kind"][vim_item.kind])
            vim_item.menu = ({
              nvim_lsp = "(LSP)",
              luasnip = "(Snippet)",
              buffer = "(Buffer)",
              path = "(Path)",
            })[entry.source.name]
            return vim_item
          end,
        },
        window = {
          -- completion = cmp.config.window.bordered(),
          -- documentation = cmp.config.window.bordered(),
          -- remove border window from cmp
          completion = {
            border = icons.Border,
            winhighlight = "Normal:bg,FloatBorder:BorderBG,CursorLine:PmenuSel,Search:None",
            scrollbar = true,
          },
          documentation = vim.g.pcode_disable_cmpdoc and cmp.config.disable or cmp_documentation,
        },
        experimental = {
          ghost_text = lspghost_text,
          native_menu = false,
        },
      }
    end,
  },
}