require('mason').setup({
  ui = {
    icons = {
      package_installed = "✓",
      package_pending = "➜",
      package_uninstalled = "✗"
    }
  }
})

require('mason-lspconfig').setup({
  -- A list of servers to automatically install if they're not already installed
  ensure_installed = {
    'pylsp',
    'lua_ls',
    'rust_analyzer',
    'yamlls',
    'ts_ls',
    'gopls',
    'pylsp',
    'clangd',
  },
})

-- Customized on_attach function
-- See `:help vim.diagnostic.*` for documentation on any of the below functions
local opts = { noremap = true, silent = true }
vim.keymap.set('n', '<space>e', vim.diagnostic.open_float, opts)
vim.keymap.set('n', '<space>q', vim.diagnostic.setloclist, opts)
vim.keymap.set('n', '[d', vim.diagnostic.goto_prev, opts)
vim.keymap.set('n', ']d', vim.diagnostic.goto_next, opts)

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

  -- 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', '<space>D', vim.lsp.buf.type_definition, bufopts)
  vim.keymap.set('n', '<space>rn', vim.lsp.buf.rename, bufopts)
  -- vim.keymap.set('n', '<space>ca', vim.lsp.buf.code_action, bufopts)
  vim.keymap.set("n", "<space>f", function()
    vim.lsp.buf.format({ async = true })
  end, bufopts)

  -- 2024-09-09 - some ccflow commands

  local fzf = require('fzf-lua')
  vim.keymap.set('n', '<space>d', fzf.diagnostics_document, { desc = "Doc diagnostics" })
  vim.keymap.set('n', '<space>D', fzf.diagnostics_workspace, { desc = "Workspace diagnostics" })
  vim.keymap.set('n', '<space>s', fzf.lsp_document_symbols, { desc = "Doc symbols" })
  vim.keymap.set('n', '<space>c', fzf.lsp_code_actions, { desc = "Code Actions" })
  -- vim.keymap.set('n', 'gr', vim.lsp.buf.references, bufopts)
  vim.keymap.set('n', '<C-[>', fzf.lsp_references, { desc = "Find References" })
  vim.keymap.set('n', '<C-]>', fzf.lsp_definitions, { desc = "Find References" })
end

-- Set different settings for different languages' LSP
-- LSP list: https://github.com/neovim/nvim-lspconfig/blob/master/doc/server_configurations.md
-- How to use setup({}): https://github.com/neovim/nvim-lspconfig/wiki/Understanding-setup-%7B%7D
--     - the settings table is sent to the LSP
--     - on_attach: a lua callback function to run after LSP attaches to a given buffer
local lspconfig = require('lspconfig')

-- from :h mason-lspconfig-automatic-server-setup
require('mason-lspconfig').setup_handlers({
  -- The first entry (without a key) will be the default handler
  -- and will be called for each installed server that doesn't have
  -- a dedicated handler.
  function(server_name) -- default handler (optional)
    if server_name == 'ts_ls' then
      -- taken from https://github.com/vuejs/language-tools
      -- If you are using mason.nvim, you can get the ts_plugin_path like this
      local mason_registry = require('mason-registry')
      local vue_language_server_path = mason_registry.get_package('vue-language-server'):get_install_path() ..
          '/node_modules/@vue/language-server'

      lspconfig[server_name].setup {
        on_attach = on_attach,
        init_options = {
          plugins = {
            {
              name = '@vue/typescript-plugin',
              location = vue_language_server_path,
              languages = { 'vue' },
            },
          },
        },
        filetypes = { 'typescript', 'javascript', 'javascriptreact', 'typescriptreact', 'vue' },
      }
    else
      lspconfig[server_name].setup {
        on_attach = on_attach
      }
    end
  end
})