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

local utils = require("telescope-orgmode.utils")

local api = require("orgmode.api")

return function(opts)
	opts = opts or {}

	local closest_headline = api.current():get_closest_headline()

	local function refile(prompt_bufnr)
		local entry = action_state.get_selected_entry()
		actions.close(prompt_bufnr)

		-- Refile to the file by default
		local destination = entry.value.file

		-- Refile to a specific heading if is set
		if entry.value.headline then
			destination = entry.value.headline
		end

		return api.refile({
			source = closest_headline,
			destination = destination,
		})
	end

	local function gen_depth_toggle(opts, prompt_bufnr)
		local status = state.get_status(prompt_bufnr)
		status._ot_current_depth = opts.max_depth
		status._ot_next_depth = nil
		if status._ot_current_depth ~= 0 then
			status._ot_next_depth = 0
		end

		return function()
			local current_picker = action_state.get_current_picker(prompt_bufnr)

			local aux = status._ot_current_depth
			status._ot_current_depth = status._ot_next_depth
			status._ot_next_depth = aux

			opts.max_depth = status._ot_current_depth
			local new_finder = finders.new_table({
				results = utils.get_entries(opts),
				entry_maker = opts.entry_maker or utils.make_entry(opts),
			})

			current_picker:refresh(new_finder, opts)
		end
	end

	pickers
		.new(opts, {
			-- TODO: alter prompt title when depth is 0: Refile under file, Refile
			-- under Headline
			prompt_title = "Refile Destination",
			finder = finders.new_table({
				results = utils.get_entries(opts),
				entry_maker = opts.entry_maker or utils.make_entry(opts),
			}),
			sorter = conf.generic_sorter(opts),
			previewer = conf.grep_previewer(opts),
			attach_mappings = function(prompt_bufnr, map)
				action_set.select:replace(refile)
				map("i", "<c-space>", gen_depth_toggle(opts, prompt_bufnr))
				return true
			end,
		})
		:find()
end