local lspconf = require("lspconfig")
local cmp = require("cmp")
local capabilities = require("cmp_nvim_lsp").default_capabilities()

vim.opt.signcolumn = "yes"

local servers = {
  ["lua_ls"] = {
    settings = {
      Lua = {
        runtime = {
          version = "LuaJIT"
        }
      }
    }
  },
  ["clangd"] = {},
}

for lsp, conf in pairs(servers) do
  conf.capabilities = capabilities
  lspconf[lsp].setup(conf)
end


cmp.setup({
  preselect = "item",
  completion = {
    completeopt = "menu,menuone,noinsert",
  },
  window = {
    completion = cmp.config.window.bordered(),
    documentation = cmp.config.window.bordered(),
  },
  formatting = {
    fields = { "menu", "abbr", "kind" },

    format = function(entry, item)
      local menu_icon = {
        nvim_lsp = "L",
        buffer = "B",
        path = "P",
        nvim_lua = "NL",
      }

      item.menu = menu_icon[entry.source.name]

      return item
    end,
  },
  mapping = {
    ["<CR>"] = cmp.mapping.confirm({ select = false }),
    ["<Tab>"] = cmp.mapping.select_next_item(),
    ["<S-Tab>"] = cmp.mapping.select_prev_item(),
  },
  sources = {
    { name = "path" },
    { name = "nvim_lsp" },
    { name = "buffer",  keyword_length = 3 },
  },
})

vim.api.nvim_create_autocmd("LspAttach", {
  group = vim.api.nvim_create_augroup("UserLspConfig", {}),
  callback = function(ev)
    vim.bo[ev.buf].omnifunc = "v:lua.vim.lsp.omnifunc"
    local opts = { buffer = ev.buf }
    vim.keymap.set("n", "gD", vim.lsp.buf.declaration, opts)
    vim.keymap.set("n", "gd", vim.lsp.buf.definition, opts)
    vim.keymap.set("n", "gi", vim.lsp.buf.implementation, opts)
    vim.keymap.set("n", "gr", vim.lsp.buf.references, opts)
    vim.keymap.set("n", "go", vim.lsp.buf.type_definition, opts)
    vim.keymap.set("n", "<leader>ls", vim.lsp.buf.signature_help, opts)
    vim.keymap.set("n", "<space>rn", vim.lsp.buf.rename, opts)
    vim.keymap.set("n", "<leader>h", vim.lsp.buf.hover, opts)
    vim.keymap.set({"n", "v"}, "<space>ca", vim.lsp.buf.code_action, opts)
    vim.keymap.set("n", "<space>f",
      function()
        vim.lsp.buf.format({async = true})
      end, opts)
  end
})