local status_ok, lspconfig = pcall(require, "lspconfig")
if not status_ok then
  return
end

local signs = {
  { name = "DiagnosticSignError", text = "" },
  { name = "DiagnosticSignWarn", text = "" },
  { name = "DiagnosticSignHint", text = "" },
  { name = "DiagnosticSignInfo", text = "" },
}

for _, sign in ipairs(signs) do
  vim.fn.sign_define(sign.name, { texthl = sign.name, text = sign.text, numhl = "" })
end

local config = {
  virtual_text = false,
  signs = {
    active = signs,
  },
  update_in_insert = true,
  underline = true,
  severity_sort = true,
  float = {
    focusable = false,
    style = "minimal",
    border = "none",
    -- max_width = 80,
    source = "always",
    header = "",
    prefix = "",
  },
}

-- TODO set this up when upgrading to Neovim v0.8
local navic = require('nvim-navic')

vim.diagnostic.config(config)
vim.lsp.handlers["textDocument/hover"] = vim.lsp.with(vim.lsp.handlers.hover, {
  border = "rounded",
})
local capabilities = vim.lsp.protocol.make_client_capabilities()
local status_ok, cmp_nvim_lsp = pcall(require, "cmp_nvim_lsp")
if not status_ok then
  return
end
capabilities = cmp_nvim_lsp.default_capabilities(capabilities)

local opts = { noremap=true, silent=true }
vim.keymap.set('n', 'gl', vim.diagnostic.open_float, opts)
vim.keymap.set('n', '[d', vim.diagnostic.goto_prev, opts)
vim.keymap.set('n', ']d', vim.diagnostic.goto_next, opts)
vim.keymap.set('n', '<leader>q', vim.diagnostic.setloclist, opts)

local on_attach = function(client, bufnr)
  -- Enable completion triggered by <c-x><c-o>
  vim.api.nvim_buf_set_option(bufnr, 'omnifunc', 'v:lua.vim.lsp.omnifunc')

  -- Mappings.
  -- See `:help vim.lsp.*` for documentation on any of the below functions
  local bufopts = { noremap=true, silent=true, buffer=bufnr }
  vim.keymap.set('n', 'gD', vim.lsp.buf.declaration, bufopts)
  vim.keymap.set('n', 'gd', vim.lsp.buf.definition, bufopts)
  vim.keymap.set('n', 'K', vim.lsp.buf.hover, bufopts)
  vim.keymap.set('n', 'gi', vim.lsp.buf.implementation, bufopts)
  vim.keymap.set('n', '<C-k>', vim.lsp.buf.signature_help, bufopts)
  vim.keymap.set('n', '<space>wa', vim.lsp.buf.add_workspace_folder, bufopts)
  vim.keymap.set('n', '<space>wr', vim.lsp.buf.remove_workspace_folder, bufopts)
  vim.keymap.set('n', '<space>wl', function()
    print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
  end, bufopts)
  vim.keymap.set('n', '<leader>D', vim.lsp.buf.type_definition, bufopts)
  vim.keymap.set('n', '<leader>rn', vim.lsp.buf.rename, bufopts)
  vim.keymap.set('n', '<leader>ca', vim.lsp.buf.code_action, bufopts)
  vim.keymap.set('n', 'gr', vim.lsp.buf.references, bufopts)
  vim.keymap.set('n', '<leader>]', "<cmd>lua vim.lsp.buf.format({async = true})<cr>", bufopts)

  -- TODO set this up when upgrading to Neovim v0.8
  if client.server_capabilities.documentSymbolProvider then
      navic.attach(client, bufnr)
  end
end


lspconfig.pyright.setup{
  capabilities = capabilities,
  on_attach = on_attach,
  settings = {
    python = {
      analysis = {
        typeCheckingMode = "off"
      }
    }
  }
}

lspconfig.gopls.setup{
  capabilities = capabilities,
  on_attach = on_attach
}

lspconfig.tsserver.setup{
  capabilities = capabilities,
  on_attach = on_attach,
}

lspconfig.jsonls.setup{
  capabilities = capabilities,
  on_attach = on_attach,
}

lspconfig.ccls.setup{
  capabilities = capabilities,
  on_attach = on_attach,
}

lspconfig.lua_ls.setup {
  capabilities = capabilities,
  on_attach = on_attach,
  on_init = function(client)
    local path = client.workspace_folders[1].name
    if not vim.loop.fs_stat(path..'/.luarc.json') and not vim.loop.fs_stat(path..'/.luarc.jsonc') then
      client.config.settings = vim.tbl_deep_extend('force', client.config.settings, {
        Lua = {
          runtime = {
            -- Tell the language server which version of Lua you're using
            -- (most likely LuaJIT in the case of Neovim)
            version = 'LuaJIT'
          },
          -- Make the server aware of Neovim runtime files
          workspace = {
            checkThirdParty = false,
            library = {
              vim.env.VIMRUNTIME
              -- "${3rd}/luv/library"
              -- "${3rd}/busted/library",
            }
            -- or pull in all of 'runtimepath'. NOTE: this is a lot slower
            -- library = vim.api.nvim_get_runtime_file("", true)
          }
        }
      })

      client.notify("workspace/didChangeConfiguration", { settings = client.config.settings })
    end
    return true
  end
}

-- lspconfig.terraformls.setup{
--   capabilities = capabilities,
--   on_attach = on_attach,
-- }

--
local null_ls = require("null-ls")

null_ls.setup({
  debug = false,
  on_attach = on_attach,
  sources = {
    -- (java|type)script
    null_ls.builtins.formatting.prettierd,
    -- python
    null_ls.builtins.formatting.black.with({extra_args={"--fast"}}),
    null_ls.builtins.formatting.isort.with({extra_args={"--profile", "black"}}),
    null_ls.builtins.diagnostics.flake8.with({
      condition = function(utils)
        return utils.root_has_file({".flake8"})
      end,
    }),
    null_ls.builtins.diagnostics.mypy.with({
      condition = function(utils)
        return utils.root_has_file({"pyproject.toml"})
      end,
    }),
  },
})