--- ### AstroNvim UI Options
--
-- This module is automatically loaded by AstroNvim on during it's initialization into global variable `astronvim.ui`
--
-- This module can also be manually loaded with `local updater = require("core.utils").ui`
--
-- @module core.utils.ui
-- @see core.utils
-- @copyright 2022
-- @license GNU General Public License v3.0

astronvim.ui = {}

local function bool2str(bool) return bool and "on" or "off" end

local function ui_notify(str)
  if vim.g.ui_notifications_enabled then astronvim.notify(str) end
end

--- Toggle notifications for UI toggles
function astronvim.ui.toggle_ui_notifications()
  vim.g.ui_notifications_enabled = not vim.g.ui_notifications_enabled
  ui_notify(string.format("ui notifications %s", bool2str(vim.g.ui_notifications_enabled)))
end

--- Toggle autopairs
function astronvim.ui.toggle_autopairs()
  local ok, autopairs = pcall(require, "nvim-autopairs")
  if ok then
    if autopairs.state.disabled then
      autopairs.enable()
    else
      autopairs.disable()
    end
    vim.g.autopairs_enabled = autopairs.state.disabled
    ui_notify(string.format("autopairs %s", bool2str(not autopairs.state.disabled)))
  else
    ui_notify "autopairs not available"
  end
end

--- Toggle diagnostics
function astronvim.ui.toggle_diagnostics()
  local status = "on"
  if vim.g.status_diagnostics_enabled then
    if vim.g.diagnostics_enabled then
      vim.g.diagnostics_enabled = false
      status = "virtual text off"
    else
      vim.g.status_diagnostics_enabled = false
      status = "fully off"
    end
  else
    vim.g.diagnostics_enabled = true
    vim.g.status_diagnostics_enabled = true
  end

  vim.diagnostic.config(astronvim.lsp.diagnostics[bool2str(vim.g.diagnostics_enabled)])
  ui_notify(string.format("diagnostics %s", status))
end

--- Toggle background="dark"|"light"
function astronvim.ui.toggle_background()
  vim.go.background = vim.go.background == "light" and "dark" or "light"
  ui_notify(string.format("background=%s", vim.go.background))
end

--- Toggle cmp entrirely
function astronvim.ui.toggle_cmp()
  vim.g.cmp_enabled = not vim.g.cmp_enabled
  local ok, _ = pcall(require, "cmp")
  ui_notify(ok and string.format("completion %s", bool2str(vim.g.cmp_enabled)) or "completion not available")
end

--- Toggle auto format
function astronvim.ui.toggle_autoformat()
  vim.g.autoformat_enabled = not vim.g.autoformat_enabled
  ui_notify(string.format("Autoformatting %s", bool2str(vim.g.autoformat_enabled)))
end

--- Toggle showtabline=2|0
function astronvim.ui.toggle_tabline()
  vim.opt.showtabline = vim.opt.showtabline:get() == 0 and 2 or 0
  ui_notify(string.format("tabline %s", bool2str(vim.opt.showtabline:get() == 2)))
end

--- Toggle conceal=2|0
function astronvim.ui.toggle_conceal()
  vim.opt.conceallevel = vim.opt.conceallevel:get() == 0 and 2 or 0
  ui_notify(string.format("conceal %s", bool2str(vim.opt.conceallevel:get() == 2)))
end

--- Toggle laststatus=3|2|0
function astronvim.ui.toggle_statusline()
  local laststatus = vim.opt.laststatus:get()
  local status
  if laststatus == 0 then
    vim.opt.laststatus = 2
    status = "local"
  elseif laststatus == 2 then
    vim.opt.laststatus = 3
    status = "global"
  elseif laststatus == 3 then
    vim.opt.laststatus = 0
    status = "off"
  end
  ui_notify(string.format("statusline %s", status))
end

--- Toggle signcolumn="auto"|"no"
function astronvim.ui.toggle_signcolumn()
  if vim.wo.signcolumn == "no" then
    vim.wo.signcolumn = "yes"
  elseif vim.wo.signcolumn == "yes" then
    vim.wo.signcolumn = "auto"
  else
    vim.wo.signcolumn = "no"
  end
  ui_notify(string.format("signcolumn=%s", vim.wo.signcolumn))
end

--- Set the indent and tab related numbers
function astronvim.ui.set_indent()
  local input_avail, input = pcall(vim.fn.input, "Set indent value (>0 expandtab, <=0 noexpandtab): ")
  if input_avail then
    local indent = tonumber(input)
    if not indent or indent == 0 then return end
    vim.bo.expandtab = (indent > 0) -- local to buffer
    indent = math.abs(indent)
    vim.bo.tabstop = indent -- local to buffer
    vim.bo.softtabstop = indent -- local to buffer
    vim.bo.shiftwidth = indent -- local to buffer
    ui_notify(string.format("indent=%d %s", indent, vim.bo.expandtab and "expandtab" or "noexpandtab"))
  end
end

--- Change the number display modes
function astronvim.ui.change_number()
  local number = vim.wo.number -- local to window
  local relativenumber = vim.wo.relativenumber -- local to window
  if not number and not relativenumber then
    vim.wo.number = true
  elseif number and not relativenumber then
    vim.wo.relativenumber = true
  elseif number and relativenumber then
    vim.wo.number = false
  else -- not number and relativenumber
    vim.wo.relativenumber = false
  end
  ui_notify(string.format("number %s, relativenumber %s", bool2str(vim.wo.number), bool2str(vim.wo.relativenumber)))
end

--- Toggle spell
function astronvim.ui.toggle_spell()
  vim.wo.spell = not vim.wo.spell -- local to window
  ui_notify(string.format("spell %s", bool2str(vim.wo.spell)))
end

--- Toggle paste
function astronvim.ui.toggle_paste()
  vim.opt.paste = not vim.opt.paste:get() -- local to window
  ui_notify(string.format("paste %s", bool2str(vim.opt.paste:get())))
end

--- Toggle wrap
function astronvim.ui.toggle_wrap()
  vim.wo.wrap = not vim.wo.wrap -- local to window
  ui_notify(string.format("wrap %s", bool2str(vim.wo.wrap)))
end

--- Toggle syntax highlighting and treesitter
function astronvim.ui.toggle_syntax()
  local ts_avail, parsers = pcall(require, "nvim-treesitter.parsers")
  if vim.g.syntax_on then -- global var for on//off
    if ts_avail and parsers.has_parser() then vim.cmd.TSBufDisable "highlight" end
    vim.cmd.syntax "off" -- set vim.g.syntax_on = false
  else
    if ts_avail and parsers.has_parser() then vim.cmd.TSBufEnable "highlight" end
    vim.cmd.syntax "on" -- set vim.g.syntax_on = true
  end
  ui_notify(string.format("syntax %s", bool2str(vim.g.syntax_on)))
end

--- Toggle URL/URI syntax highlighting rules
function astronvim.ui.toggle_url_match()
  vim.g.highlighturl_enabled = not vim.g.highlighturl_enabled
  astronvim.set_url_match()
end