local M = {}

local config = require("runner.config")

M._buffer = nil
M._window = nil

M.create_buffer = function()
	if M._buffer then
		vim.api.nvim_buf_delete(M._buffer, {})
	end

	local buffer = vim.api.nvim_create_buf(true, true)
	vim.api.nvim_buf_set_option(buffer, "modifiable", false)

	M._buffer = buffer
	return buffer
end

M.create_window = function()
	if M._window and vim.api.nvim_win_is_valid(M._window) then
		vim.api.nvim_set_current_win(M._window)
		return M._window
	end

	if config.options.position == "right" then
		vim.cmd("botright " .. config.options.width .. " vsplit")
	elseif config.options.position == "left" then
		vim.cmd("topleft " .. config.options.width .. " vsplit")
	elseif config.options.position == "bottom" then
		vim.cmd("botright " .. config.options.height .. "split")
	elseif config.options.position == "top" then
		vim.cmd("topleft " .. config.options.height .. "split")
	end

	local window = vim.api.nvim_get_current_win()

	local window_opts = {
		number = false,
		relativenumber = false,
		wrap = true,
		spell = false,
		foldenable = false,
		signcolumn = "no",
		colorcolumn = "",
		cursorline = true,
	}

	for key, value in pairs(window_opts) do
		vim.api.nvim_win_set_option(window, key, value)
	end

	M._window = window
	return window
end

M.run_command = function(command, callback)
	local output = {}

	local add_line = function(_, data)
		output[#output + 1] = data
	end

	vim.fn.jobstart(command, {
		cwd = vim.fn.getcwd(),
		on_stdout = add_line,
		on_exit = function()
			callback(output)
		end,
	})
end

local is_win = function()
	return package.config:sub(1, 1) == "\\"
end

local get_path_separator = function()
	if package.config:sub(1, 1) == "\\" then
		return "\\"
	end
	return "/"
end

M.script_path = function()
	local str = debug.getinfo(2, "S").source:sub(2)
	if is_win() then
		str = str:gsub("/", "\\")
	end
	return str:match("(.*" .. get_path_separator() .. ")")
end

return M