"== highlight the occurrance of the word at cursor
hi LspReferenceText ctermbg=gray guibg=gray
hi LspReferenceRead ctermbg=lightblue guibg=lightblue
hi LspReferenceWrite ctermbg=lightgreen guibg=lightgreen
"autocmd CursorHold * lua vim.lsp.buf.document_highlight()
"autocmd CursorMoved * lua vim.lsp.buf.clear_references()

lua << EOF
local nvim_lsp = require('lspconfig')
local navic = require("nvim-navic")

navic.setup {
    icons = {
        File          = "󰈙 ",
        Module        = " ",
        Namespace     = "󰌗 ",
        Package       = " ",
        Class         = "󰌗 ",
        Method        = "󰆧 ",
        Property      = " ",
        Field         = " ",
        Constructor   = " ",
        Enum          = "󰕘",
        Interface     = "󰕘",
        Function      = "󰊕 ",
        Variable      = "󰆧 ",
        Constant      = "󰏿 ",
        String        = "󰀬 ",
        Number        = "󰎠 ",
        Boolean       = "◩ ",
        Array         = "󰅪 ",
        Object        = "󰅩 ",
        Key           = "󰌋 ",
        Null          = "󰟢 ",
        EnumMember    = " ",
        Struct        = "󰌗 ",
        Event         = " ",
        Operator      = "󰆕 ",
        TypeParameter = "󰊄 ",
    },
    lsp = {
        auto_attach = false,
        preference = nil,
    },
    highlight = false,
    separator = " > ",
    depth_limit = 0,
    depth_limit_indicator = "..",
    safe_output = true,
    lazy_update_context = false,
    click = false,
    format_text = function(text)
        return text
    end,
}

local working_dir = vim.fn.getcwd()

-- Use an on_attach function to only map the following keys
-- after the language server attaches to the current buffer
local on_attach = function(client, bufnr)
  local function buf_set_keymap(...) vim.api.nvim_buf_set_keymap(bufnr, ...) end
  local function buf_set_option(...) vim.api.nvim_buf_set_option(bufnr, ...) end

  -- Enable completion triggered by <c-x><c-o>
  buf_set_option('omnifunc', 'v:lua.vim.lsp.omnifunc')

  -- Mappings.
  local opts = { noremap=true, silent=true }

  -- See `:help vim.lsp.*` for documentation on any of the below functions
  buf_set_keymap('n', 'gD', '<cmd>lua vim.lsp.buf.declaration()<CR>', opts)
  buf_set_keymap('n', 'gd', '<cmd>lua vim.lsp.buf.definition()<CR>', opts)
  buf_set_keymap('n', 'K', '<cmd>lua vim.lsp.buf.hover()<CR>', opts)
  buf_set_keymap('n', 'gi', '<cmd>lua vim.lsp.buf.implementation()<CR>', opts)
  buf_set_keymap('n', '<C-k>', '<cmd>lua vim.lsp.buf.signature_help()<CR>', opts)
  buf_set_keymap('n', '<space>wa', '<cmd>lua vim.lsp.buf.add_workspace_folder()<CR>', opts)
  buf_set_keymap('n', '<space>wr', '<cmd>lua vim.lsp.buf.remove_workspace_folder()<CR>', opts)
  buf_set_keymap('n', '<space>wl', '<cmd>lua print(vim.inspect(vim.lsp.buf.list_workspace_folders()))<CR>', opts)
  buf_set_keymap('n', '<space>D', '<cmd>lua vim.lsp.buf.type_definition()<CR>', opts)
  buf_set_keymap('n', '<space>rn', '<cmd>lua vim.lsp.buf.rename()<CR>', opts)
  buf_set_keymap('n', '<space>ca', '<cmd>lua vim.lsp.buf.code_action()<CR>', opts)
  buf_set_keymap('n', 'gr', '<cmd>lua vim.lsp.buf.references()<CR>', opts)
  buf_set_keymap('n', '<space>e', '<cmd>lua vim.diagnostic.open_float()<CR>', opts)
  buf_set_keymap('n', '[d', '<cmd>lua vim.lsp.diagnostic.goto_prev()<CR>', opts)
  buf_set_keymap('n', ']d', '<cmd>lua vim.lsp.diagnostic.goto_next()<CR>', opts)
  buf_set_keymap('n', '<space>q', '<cmd>lua vim.lsp.diagnostic.set_loclist()<CR>', opts)
  buf_set_keymap('n', '<space>f', '<cmd>lua vim.lsp.buf.formatting()<CR>', opts)
  
  if client.server_capabilities.documentSymbolProvider then
     navic.attach(client, bufnr)
  end
end

require'lspconfig'.clangd.setup{
cmd = {"/usr/bin/clangd-17", "--background-index", "--compile-commands-dir="..working_dir, "--enable-config", "--header-insertion=never", "--offset-encoding=utf-16"},
    on_attach = on_attach,
    flags = {
      debounce_text_changes = 150,
    }
}

-- lsp for bash
-- npm i -g bash-language-server
require'lspconfig'.bashls.setup{}

-- lsp for python
-- pip install pyright
require'lspconfig'.pyright.setup{}

require'lspconfig'.rust_analyzer.setup{
    on_attach=on_attach,
    settings = {
        ["rust-analyzer"] = {
            imports = {
                granularity = {
                    group = "module",
                },
                prefix = "self",
            },
            cargo = {
                buildScripts = {
                    enable = true,
                },
            },
            procMacro = {
                enable = true
            },
        }
    }
}
EOF