-- diagnostics
vim.diagnostic.config({
  severity_sort = true,
  virtual_text = true,
})

-- cmp setup
local cmp = require('cmp')
cmp.setup({
  sources = {
    { name = 'nvim_lsp' },
  },
  mapping = cmp.mapping.preset.insert({
    ['<C-Space>'] = cmp.mapping.complete(),
    ['<CR>'] = cmp.mapping.confirm({ select = true }),
  }),
})

-- shared capabilities (cmp + snippet support)
local capabilities = require('cmp_nvim_lsp').default_capabilities()
capabilities.textDocument.completion.completionItem.snippetSupport = true

-- shared keymaps when LSP attaches
local on_attach = function(_, bufnr)
  local map = function(mode, lhs, rhs)
    vim.keymap.set(mode, lhs, rhs, { buffer = bufnr })
  end

  map("n", "gd", vim.lsp.buf.definition)
  map("n", "gD", vim.lsp.buf.declaration)
  map("n", "gr", vim.lsp.buf.references)
  map("n", "K",  vim.lsp.buf.hover)
end

-- helper to setup servers
local lspconfig = require('lspconfig')

local function setup(server, opts)
  opts = opts or {}
  opts.capabilities = capabilities
  opts.on_attach = on_attach
  lspconfig[server].setup(opts)
end

-- servers
setup("pyright")
setup("rust_analyzer")

setup("lua_ls", {
  settings = {
    Lua = {
      diagnostics = {
        globals = { "vim" }
      }
    }
  }
})

setup("html")

setup("gopls", {
  settings = {
    gopls = {
      analyses = {
        unusedparams = true,
        nilness = true,
        unusedwrite = true,
        useany = true,
      },
      staticcheck = true,
      gofumpt = true,
    },
  },
})

setup("clangd", {
  cmd = { "clangd", "--background-index", "--query-driver=/usr/bin/gcc,/usr/bin/g++",},
})