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;; Handlers for the requests and responses from and to the lsp server.
(module config.lsp.handlers {autoload {util util nvim aniseed.nvim}})

(def- signs [{:name :DiagnosticSignError :text ""}
             {:name :DiagnosticSignWarn :text ""}
             {:name :DiagnosticSignHint :text ""}
             {:name :DiagnosticSignInfo :text ""}])

(defn- apply-signs [] (each [_ sign (ipairs signs)]
                        (vim.fn.sign_define sign.name
                                            {:texthl sign.name
                                             :text sign.text
                                             :numhl ""})))

(def- config {:virtual_text false
              :signs {:active signs}
              :update_in_insert true
              :underline true
              :severity_sort true
              :float {:focusable false
                      :style :minimal
                      :border :rounded
                      :source :always
                      :header ""
                      :prefix ""}})

(defn setup [] (apply-signs) (vim.diagnostic.config config)
      (set vim.lsp.handlers.textDocument/hover
           (vim.lsp.with {:border :rounded :width 60}))
      (set vim.lsp.handlers.textDocument/signatureHelp
           (vim.lsp.with vim.lsp.handlers.signature_help
                         {:border :rounded :width 60})))

(defn- lsp-keymaps [bufnr]
       (let [opts {:noremap true :silent true}]
         (nvim.buf_set_keymap bufnr :n :gD
                              "<cmd>lua vim.lsp.buf.declaration()<CR>" opts)
         (nvim.buf_set_keymap bufnr :n :gd
                              "<cmd>lua vim.lsp.buf.definition()<CR>" opts)
         (nvim.buf_set_keymap bufnr :n :gI
                              "<cmd>lua vim.lsp.buf.implementation()<CR>" opts)
         (nvim.buf_set_keymap bufnr :n :gr
                              "<cmd>lua vim.lsp.buf.references()<CR>" opts)
         (nvim.buf_set_keymap bufnr :n :gl
                              "<cmd>lua vim.diagnostic.open_float()<CR>" opts)
         (nvim.buf_set_keymap bufnr :n :gs
                              "<cmd>lua vim.lsp.buf.signature_help()<CR>" opts)))

(defn on-attach [client bufnr] (if (= client.name :html)
                                   (set client.server_capabilities.document_formatting
                                        false))
      (lsp-keymaps bufnr))

(defn capabilities []
      (let [capabilities (vim.lsp.protocol.make_client_capabilities)]
        (set capabilities.textDocument.completion.completionItem.snippetSupport
             true)
        (let [cmp-nvim-lsp (util.load-plugin :cmp_nvim_lsp)]
          (cmp-nvim-lsp.update_capabilities capabilities))))