local function gh(repo) return 'https://github.com/' .. repo end
do
  ---@type (string|vim.pack.Spec)[]
  local telescope_plugins = {
    gh 'nvim-lua/plenary.nvim',
    gh 'nvim-telescope/telescope.nvim',
    gh 'nvim-telescope/telescope-ui-select.nvim',
  }
  if vim.fn.executable 'make' == 1 then table.insert(telescope_plugins, gh 'nvim-telescope/telescope-fzf-native.nvim') end

  -- NOTE: You can install multiple plugins at once
  vim.pack.add(telescope_plugins)

  local actions = require 'telescope.actions'
  -- [[ Configure Telescope ]]
  -- See `:help telescope` and `:help telescope.setup()`
  require('telescope').setup {
    -- You can put your default mappings / updates / etc. in here
    --  All the info you're looking for is in `:help telescope.setup()`
    defaults = {
      layout_strategy = 'horizontal',
      layout_config = {
        width = 0.9,
        height = 0.9,
      },
      preview_width = 0.6,

      path_display = { 'truncate' },
      mappings = {
        n = {
          ['<c-w>'] = actions.add_selected_to_qflist + actions.open_qflist,
        },
        i = {
          ['<C-enter>'] = 'to_fuzzy_refine',
          ['<C-j>'] = actions.move_selection_next,
          ['<C-k>'] = actions.move_selection_previous,
          ['<C-space>'] = actions.add_selection,
          ['<C-h>'] = actions.add_selection,
          ['<C-l>'] = actions.select_default,
          ['<C-w>'] = actions.add_selected_to_qflist + actions.open_qflist,
          ['<C-c>'] = actions.close,
        },
      },
    },
    pickers = {
      find_files = {
        find_command = { 'rg', '--files', '--hidden', '--glob', '!**/.git/*' },
      },
    },
    extensions = {
      ['ui-select'] = {
        require('telescope.themes').get_dropdown(),
      },
    },
  }

  -- Enable Telescope extensions if they are installed
  pcall(require('telescope').load_extension, 'fzf')
  pcall(require('telescope').load_extension, 'ui-select')

  -- See `:help telescope.builtin`
  local builtin = require 'telescope.builtin'
  vim.keymap.set('n', '<leader>fh', builtin.help_tags, { desc = '[F]ind [H]elp' })
  vim.keymap.set('n', '<leader>fk', builtin.keymaps, { desc = '[F]ind [K]eymaps' })
  vim.keymap.set('n', '<leader>ff', builtin.find_files, { desc = '[F]ind [F]iles' })
  vim.keymap.set('n', '<leader>fs', builtin.builtin, { desc = '[F]ind [S]elect Telescope' })
  vim.keymap.set({ 'n', 'v' }, '<leader>fw', builtin.grep_string, { desc = '[F]ind current [W]ord' })
  vim.keymap.set('n', '<leader>fg', builtin.live_grep, { desc = '[F]ind by [G]rep' })
  vim.keymap.set('n', '<leader>fd', builtin.diagnostics, { desc = '[F]ind [D]iagnostics' })
  vim.keymap.set('n', '<leader>f.', builtin.resume, { desc = '[F]ind [R]esume' })
  vim.keymap.set('n', '<leader>fr', builtin.oldfiles, { desc = '[F]ind [R]ecent Files' })
  vim.keymap.set('n', '<leader>fc', builtin.commands, { desc = '[F]ind [C]ommands' })
  vim.keymap.set('n', '<leader>f<leader>', builtin.buffers, { desc = '[F]ind existing buffers' })

  -- Add Telescope-based LSP pickers when an LSP attaches to a buffer.
  -- If you later switch picker plugins, this is where to update these mappings.
  vim.api.nvim_create_autocmd('LspAttach', {
    group = vim.api.nvim_create_augroup('telescope-lsp-attach', { clear = true }),
    callback = function(event)
      local buf = event.buf

      -- Find references for the word under your cursor.
      vim.keymap.set('n', 'grr', builtin.lsp_references, { buffer = buf, desc = '[G]oto [R]eferences' })

      -- Jump to the implementation of the word under your cursor.
      -- Useful when your language has ways of declaring types without an actual implementation.
      vim.keymap.set('n', 'gri', builtin.lsp_implementations, { buffer = buf, desc = '[G]oto [I]mplementation' })

      -- Jump to the definition of the word under your cursor.
      -- This is where a variable was first declared, or where a function is defined, etc.
      -- To jump back, press <C-t>.
      vim.keymap.set('n', 'grd', builtin.lsp_definitions, { buffer = buf, desc = '[G]oto [D]efinition' })

      -- Fuzzy find all the symbols in your current document.
      -- Symbols are things like variables, functions, types, etc.
      vim.keymap.set('n', 'gO', builtin.lsp_document_symbols, { buffer = buf, desc = 'Open Document Symbols' })

      -- Fuzzy find all the symbols in your current workspace.
      -- Similar to document symbols, except searches over your entire project.
      vim.keymap.set('n', 'gW', builtin.lsp_dynamic_workspace_symbols, { buffer = buf, desc = 'Open Workspace Symbols' })

      -- Jump to the type of the word under your cursor.
      -- Useful when you're not sure what type a variable is and you want to see
      -- the definition of its *type*, not where it was *defined*.
      vim.keymap.set('n', 'grt', builtin.lsp_type_definitions, { buffer = buf, desc = '[G]oto [T]ype Definition' })
    end,
  })

  -- Slightly advanced example of overriding default behavior and theme
  vim.keymap.set('n', '<leader>/', function()
    -- You can pass additional configuration to Telescope to change the theme, layout, etc.
    builtin.current_buffer_fuzzy_find(require('telescope.themes').get_dropdown {
      winblend = 10,
      previewer = true,
    })
  end, { desc = '[/] Fuzzily search in current buffer' })

  -- It's also possible to pass additional configuration options.
  --  See `:help telescope.builtin.live_grep()` for information about particular keys
  vim.keymap.set(
    'n',
    '<leader>f/',
    function()
      builtin.live_grep {
        grep_open_files = true,
        prompt_title = 'Live Grep in Open Files',
      }
    end,
    { desc = '[F]ind [/] in Open Files' }
  )

  -- Shortcut for searching your Neovim configuration files
  vim.keymap.set('n', '<leader>fn', function() builtin.find_files { cwd = vim.fn.stdpath 'config' } end, { desc = '[F]ind [N]eovim files' })
end