local Plugin = { "neovim/nvim-lspconfig" }
Plugin.dependencies = {
  "hrsh7th/cmp-nvim-lsp",
  "williamboman/mason-lspconfig.nvim",
}

local user = {}

Plugin.event = { "BufReadPre", "BufNewFile" }
Plugin.cmd = { "LspInfo", "LspInstall", "LspUnInstall" }

function Plugin.init()
  -- See :help vim.diagnostic.config()
  vim.diagnostic.config({
    virtual_text = true,
    severity_sort = true,
    float = {
      border = "rounded",
      source = "always",
    },
  })

  vim.lsp.handlers["textDocument/hover"] = vim.lsp.with(vim.lsp.handlers.hover, { border = "rounded" })

  vim.lsp.handlers["textDocument/signatureHelp"] = vim.lsp.with(vim.lsp.handlers.signature_help, { border = "rounded" })
end

function Plugin.config()
  local lspconfig = require("lspconfig")
  local lsp_capabilities = require("cmp_nvim_lsp").default_capabilities()

  local group = vim.api.nvim_create_augroup("lsp_cmds", { clear = true })

  vim.api.nvim_create_autocmd("LspAttach", {
    group = group,
    desc = "LSP actions",
    callback = user.on_attach,
  })

  -- See :help mason-lspconfig-settings
  require("mason-lspconfig").setup({
    handlers = {
      -- See :help mason-lspconfig-dynamic-server-setup
      function(server)
        -- See :help lspconfig-setup
        lspconfig[server].setup({
          capabilities = lsp_capabilities,
        })
      end,
      ["lua_ls"] = function()
        -- if you install the language server for lua it will
        -- load the config from lua/plugins/lsp/lua_ls.lua
        require("plugins.lsp.lua_ls")
      end,
    },
  })
end

function user.on_attach(event)
  local bufmap = function(mode, lhs, rhs)
    local opts = { buffer = event.buf }
    vim.keymap.set(mode, lhs, rhs, opts)
  end

  -- You can search each function in the help page.
  -- For example :help vim.lsp.buf.hover()

  bufmap("n", "K", "<cmd>lua vim.lsp.buf.hover()<cr>")
  bufmap("n", "gd", "<cmd>lua vim.lsp.buf.definition()<cr>")
  bufmap("n", "gD", "<cmd>lua vim.lsp.buf.declaration()<cr>")
  bufmap("n", "gi", "<cmd>lua vim.lsp.buf.implementation()<cr>")
  bufmap("n", "go", "<cmd>lua vim.lsp.buf.type_definition()<cr>")
  bufmap("n", "gr", "<cmd>lua vim.lsp.buf.references()<cr>")
  bufmap("n", "gs", "<cmd>lua vim.lsp.buf.signature_help()<cr>")
  bufmap("n", "<F2>", "<cmd>lua vim.lsp.buf.rename()<cr>")
  bufmap({ "n", "x" }, "<F3>", "<cmd>lua vim.lsp.buf.format({async = true})<cr>")
  bufmap("n", "<F4>", "<cmd>lua vim.lsp.buf.code_action()<cr>")
  bufmap("n", "gl", "<cmd>lua vim.diagnostic.open_float()<cr>")
  bufmap("n", "[d", "<cmd>lua vim.diagnostic.goto_prev()<cr>")
  bufmap("n", "]d", "<cmd>lua vim.diagnostic.goto_next()<cr>")
end

return Plugin