local pickers = require("telescope.pickers")
local finders = require("telescope.finders")
local conf = require("telescope.config").values
local actions = require("telescope.actions")
local action_set = require("telescope.actions.set")
local action_state = require("telescope.actions.state")
local harpoon = require('harpoon')

local M = {}

function M.switcher()
  local filepaths = {}
  for _, item in ipairs(harpoon:list().items) do
    table.insert(filepaths, item.value)
  end

  pickers.new({
    prompt_title = "Harpoon",
    finder = finders.new_table { results = filepaths },
    sorter = conf.generic_sorter(),
    previewer = conf.file_previewer {},
    attach_mappings = function(prompt_bufnr, map)
      actions.move_selection_previous:replace(function()
        action_set.shift_selection(prompt_bufnr, -1)
      end)
      actions.move_selection_next:replace(function()
        action_set.shift_selection(prompt_bufnr, 1)
      end)

      -- remove harpoon item
      vim.keymap.set("i", "<C-a>", function()
        if action_state.get_selected_entry() then
          for i, v in ipairs(filepaths) do
            if v == action_state.get_selected_entry()[1] then
              harpoon:list():removeAt(i)
              actions.close(prompt_bufnr)
              M.switcher()
            end
          end
        end
      end)

      -- select items, and open buffer
      vim.keymap.set("i", "<C-s>", function()
        if action_state.get_selected_entry() then
          actions.close(prompt_bufnr)
          vim.cmd("split "..action_state.get_selected_entry()[1])
        end
      end, { buffer = true, remap = true })
      actions.select_default:replace(function()
        if action_state.get_selected_entry() then
          actions.close(prompt_bufnr)
          vim.cmd("e "..action_state.get_selected_entry()[1])
        end
      end)
      return true
    end
  }):find()
end

return M