Plug 'nvim-lua/popup.nvim'
Plug 'nvim-lua/plenary.nvim'
Plug 'nvim-telescope/telescope.nvim'

call dein#add('nvim-lua/popup.nvim')
call dein#add('nvim-lua/plenary.nvim')
call dein#add('nvim-telescope/telescope.nvim')

use {
  'nvim-telescope/telescope.nvim',
  requires = {{'nvim-lua/popup.nvim'}, {'nvim-lua/plenary.nvim'}}
}

" Find files using Telescope command-line sugar.
nnoremap <leader>ff <cmd>Telescope find_files<cr>
nnoremap <leader>fg <cmd>Telescope live_grep<cr>
nnoremap <leader>fb <cmd>Telescope buffers<cr>
nnoremap <leader>fh <cmd>Telescope help_tags<cr>

" Using lua functions
nnoremap <leader>ff <cmd>lua require('telescope.builtin').find_files()<cr>
nnoremap <leader>fg <cmd>lua require('telescope.builtin').live_grep()<cr>
nnoremap <leader>fb <cmd>lua require('telescope.builtin').buffers()<cr>
nnoremap <leader>fh <cmd>lua require('telescope.builtin').help_tags()<cr>

require('telescope').setup{
  defaults = {
    vimgrep_arguments = {
      'rg',
      '--color=never',
      '--no-heading',
      '--with-filename',
      '--line-number',
      '--column',
      '--smart-case'
    },
    prompt_position = "bottom",
    prompt_prefix = "> ",
    selection_caret = "> ",
    entry_prefix = "  ",
    initial_mode = "insert",
    selection_strategy = "reset",
    sorting_strategy = "descending",
    layout_strategy = "horizontal",
    layout_defaults = {
      horizontal = {
        mirror = false,
      },
      vertical = {
        mirror = false,
      },
    },
    file_sorter =  require'telescope.sorters'.get_fuzzy_file,
    file_ignore_patterns = {},
    generic_sorter =  require'telescope.sorters'.get_generic_fuzzy_sorter,
    shorten_path = true,
    winblend = 0,
    width = 0.75,
    preview_cutoff = 120,
    results_height = 1,
    results_width = 0.8,
    border = {},
    borderchars = { '─', '│', '─', '│', '╭', '╮', '╯', '╰' },
    color_devicons = true,
    use_less = true,
    set_env = { ['COLORTERM'] = 'truecolor' }, -- default = nil,
    file_previewer = require'telescope.previewers'.vim_buffer_cat.new,
    grep_previewer = require'telescope.previewers'.vim_buffer_vimgrep.new,
    qflist_previewer = require'telescope.previewers'.vim_buffer_qflist.new,

    -- Developer configurations: Not meant for general override
    buffer_previewer_maker = require'telescope.previewers'.buffer_previewer_maker
  }
}

lua << EOF
require('telescope').setup{
  -- ...
}
EOF

-- Built-in actions
local transform_mod = require('telescope.actions.mt').transform_mod

-- or create your custom action
local my_cool_custom_action = transform_mod({
  x = function()
    print("This function ran after another action. Prompt_bufnr: " .. prompt_bufnr)
    -- Enter your function logic here. You can take inspiration from lua/telescope/actions.lua
  end,
})

local actions = require('telescope.actions')
-- Global remapping
------------------------------
require('telescope').setup{
  defaults = {
    mappings = {
      i = {
        -- To disable a keymap, put [map] = false
        -- So, to not map "<C-n>", just put
        ["<c-x>"] = false,

        -- Otherwise, just set the mapping to the function that you want it to be.
        ["<C-i>"] = actions.select_horizontal,

        -- Add up multiple actions
        ["<cr>"] = actions.select_default + actions.center,

        -- You can perform as many actions in a row as you like
        ["<cr>"] = actions.select_default + actions.center + my_cool_custom_action,
      },
      n = {
        ["<esc>"] = actions.close,
        ["<C-i>"] = my_cool_custom_action,
      },
    },
  }
}

local actions = require('telescope.actions')
local action_set = require('telescope.actions.set')
-- Picker specific remapping
------------------------------
require('telescope.builtin').fd({ -- or new custom picker's attach_mappings field:
  attach_mappings = function(prompt_bufnr)
    -- This will replace select no mather on which key it is mapped by default
    action_set.select:replace(function(prompt_bufnr, type)
      local entry = action_state.get_selected_entry()
      actions.close(prompt_bufnr)
      print(vim.inspect(entry))
      -- Code here
    end)

    -- You can also enhance an action with pre and post action which will run before of after an action
    action_set.select:enhance({
      pre = function()
          -- Will run before actions.select_default
      end,
      post = function()
          -- Will run after actions.select_default
      end,
    })

    -- Or replace for all commands: default, horizontal, vertical, tab
    action_set.select:replace(function(_, type)
      print(cmd) -- Will print edit, new, vnew or tab depending on your keystroke
    end)

    return true
  end,
})
------------------------------
-- More practical example of adding a new mapping
require'telescope.builtin'.git_branches({ attach_mappings = function(_, map)
  map('i', '<c-d>', actions.git_delete_branch) -- this action already exist
  map('n', '<c-d>', actions.git_delete_branch) -- this action already exist
  -- for more actions look at lua/telescope/actions/init.lua
  return true
end})

:lua require'telescope.builtin'.planets{}

:nnoremap <Leader>pp :lua require'telescope.builtin'.planets{}

autocmd User TelescopePreviewerLoaded setlocal wrap

nnoremap <Leader>f :lua require'telescope.builtin'.find_files(require('telescope.themes').get_dropdown({}))<cr>
" Change an option
nnoremap <Leader>f :lua require'telescope.builtin'.find_files(require('telescope.themes').get_dropdown({ winblend = 10 }))<cr>

Telescope find_files theme=get_dropdown

-- This will load fzy_native and have it override the default file sorter
require('telescope').load_extension('fzy_native')

" Run the `configurations` picker from nvim-dap
:Telescope dap configurations

-- Run the `configurations` picker from nvim-dap
require('telescope').extensions.dap.configurations()

-- lua/telescope/finders.lua
Finder:new{
  entry_maker     = function(line) end,
  fn_command      = function() { command = "", args  = { "ls-files" } } end,
  static          = false,
  maximum_results = false
}

-- lua/telescope/pickers.lua
Picker:new{
  prompt_title            = "", -- REQUIRED
  finder                  = FUNCTION, -- see lua/telescope/finder.lua
  sorter                  = FUNCTION, -- see lua/telescope/sorter.lua
  previewer               = FUNCTION, -- see lua/telescope/previewer.lua
  selection_strategy      = "reset", -- follow, reset, row
  border                  = {},
  borderchars             = {"─", "│", "─", "│", "┌", "┐", "┘", "└"},
  preview_cutoff          = 120,
  default_selection_index = 1, -- Change the index of the initial selection row
}

function my_custom_picker(results)
  pickers.new(opts, {
    prompt_title = 'Custom Picker',
    finder = finders.new_table(results),
    sorter = sorters.fuzzy_with_index_bias(),
    attach_mappings = function(_, map)
      -- Map "<cr>" in insert mode to the function, actions.set_command_line
      map('i', '<cr>', actions.set_command_line)

      -- If the return value of `attach_mappings` is true, then the other
      -- default mappings are still applies.
      --
      -- Return false if you don't want any other mappings applied.
      --
      -- A return value _must_ be returned. It is an error to not return anything.
      return true
    end,
  }):find()
end

layout_strategies.horizontal = function(self, max_columns, max_lines)
  local layout_config = validate_layout_config(self.layout_config or {}, {
    width_padding = "How many cells to pad the width",
    height_padding = "How many cells to pad the height",
    preview_width = "(Resolvable): Determine preview width",
  })
  ...
end

" Show all builtin pickers
:Telescope

" Tab completion
:Telescope |<tab>
:Telescope find_files

" Setting options
:Telescope find_files prompt_prefix=🔍

" If option is table type in lua code ,you can use `,` connect each command string eg:
" find_command,vimgrep_arguments they are both table type. so config it in commandline like
:Telescope find_files find_command=rg,--ignore,--hidden,--files prompt_prefix=🔍

-- Disable preview for find files
nnoremap <leader>ff :lua require('telescope.builtin').find_files({previewer = false})<cr>

-- Change change prompt prefix for find_files builtin function:
nnoremap <leader>fg :lua require('telescope.builtin').live_grep({ prompt_prefix=🔍 })<cr>
nnoremap <leader>fg :Telescope live_grep prompt_prefix=🔍<cr>

highlight TelescopeSelection      guifg=#D79921 gui=bold " selected item
highlight TelescopeSelectionCaret guifg=#CC241D " selection caret
highlight TelescopeMultiSelection guifg=#928374 " multisections
highlight TelescopeNormal         guibg=#00000  " floating windows created by telescope.

" Border highlight groups.
highlight TelescopeBorder         guifg=#ffffff
highlight TelescopePromptBorder   guifg=#ffffff
highlight TelescopeResultsBorder  guifg=#ffffff
highlight TelescopePreviewBorder  guifg=#ffffff

" Used for highlighting characters that you match.
highlight TelescopeMatching       guifg=blue

" Used for the prompt prefix
highlight TelescopePromptPrefix   guifg=red