local M = {}

--- Shorten Function Names
local fn = vim.fn
function M.executable(name)
  if fn.executable(name) > 0 then
    return true
  end

  return false
end

--------------------------------------------------

--- Check whether a feature exists in Nvim
--- @feat: string
---   the feature name, like `nvim-0.7` or `unix`.
--- return: bool
M.has = function(feat)
  if fn.has(feat) == 1 then
    return true
  end

  return false
end

--------------------------------------------------

-- Format on save
local augroup = vim.api.nvim_create_augroup("LspFormatting", {})
require("null-ls").setup({
  -- you can reuse a shared lspconfig on_attach callback here
  on_attach = function(client, bufnr)
    if client.supports_method("textDocument/formatting") then
      vim.api.nvim_clear_autocmds({ group = augroup, buffer = bufnr })
      vim.api.nvim_create_autocmd("BufWritePre", {
        group = augroup,
        buffer = bufnr,
        callback = function()
          -- on 0.8, you should use vim.lsp.buf.format({ bufnr = bufnr }) instead
          --vim.lsp.buf.formatting_seq_sync()
          vim.lsp.buf.format({ bufnr = bufnr })
        end,
      })
    end
  end,
})

vim.cmd([[autocmd BufWritePre <buffer> lua vim.lsp.buf.format()]])
--vim.cmd [[autocmd BufWritePre * lua vim.lsp.buf.format()]]

--------------------------------------------------

---Determine if a value of any type is empty
---@param item any
---@return boolean?
function M.empty(item)
  if not item then
    return true
  end
  local item_type = type(item)
  if item_type == "string" then
    return item == ""
  end
  if item_type == "number" then
    return item <= 0
  end
  if item_type == "table" then
    return vim.tbl_isempty(item)
  end
  return item ~= nil
end

--------------------------------------------------

--- Create a dir if it does not exist
function M.may_create_dir(dir)
  local res = fn.isdirectory(dir)

  if res == 0 then
    fn.mkdir(dir, "p")
  end
end

--------------------------------------------------

--- Toggle cmp completion
vim.g.cmp_toggle_flag = false -- initialize
local normal_buftype = function()
  return vim.api.nvim_buf_get_option(0, "buftype") ~= "prompt"
end
M.toggle_completion = function()
  local ok, cmp = pcall(require, "cmp")
  if ok then
    local next_cmp_toggle_flag = not vim.g.cmp_toggle_flag
    if next_cmp_toggle_flag then
      print("completion on")
    else
      print("completion off")
    end
    cmp.setup({
      enabled = function()
        vim.g.cmp_toggle_flag = next_cmp_toggle_flag
        if next_cmp_toggle_flag then
          return normal_buftype
        else
          return next_cmp_toggle_flag
        end
      end,
    })
  else
    print("completion not available")
  end
end

--------------------------------------------------

--- Make sure using latest neovim version
function M.get_nvim_version()
  local actual_ver = vim.version()

  local nvim_ver_str = string.format("%d.%d.%d", actual_ver.major, actual_ver.minor, actual_ver.patch)
  return nvim_ver_str
end

function M.add_pack(name)
  local status, error = pcall(vim.cmd, "packadd " .. name)

  return status
end

--------------------------------------------------

--- Toggle autopairs on/off (requires "windwp/nvim-autopairs")
function M.Toggle_autopairs()
  local ok, autopairs = pcall(require, "nvim-autopairs")
  if ok then
    if autopairs.state.disabled then
      autopairs.enable()
      print("autopairs on")
    else
      autopairs.disable()
      print("autopairs off")
    end
  else
    print("autopairs not available")
  end
end

--------------------------------------------------

--- Make vim-rooter message disappear after making it's changes
--vim.cmd([[
--let timer = timer_start(1000, 'LogTrigger', {})
--func! LogTrigger(timer)
--  silent!
--endfunc
--]])
--
--vim.cmd([[
--function! ConfigureChDir()
--  echo ('')
--endfunction
--" Call after vim-rooter changes the root dir
--autocmd User RooterChDir :sleep! | call LogTrigger(timer) | call ConfigureChDir()
--]])

function M.findFilesInCwd()
  vim.cmd("let g:rooter_manual_only = 1") -- Toggle the rooter plugin
  require("plugins.telescope").findhere()
  vim.defer_fn(function()
    vim.cmd("let g:rooter_manual_only = 0") -- Change back to automatic rooter
  end, 100)
end

--function M.findFilesInCwd()
--  vim.cmd("let g:rooter_manual_only = 1") -- Toggle the rooter plugin
--  require("plugins.telescope").findhere()
--  --vim.cmd("let g:rooter_manual_only = 0") -- Change back to automatic rooter
--end

--------------------------------------------------

-- Toggle the executable permission
function M.Toggle_executable()
  local current_file = vim.fn.expand("%:p")
  local executable = vim.fn.executable(current_file) == 1

  if executable then
    -- File is executable, unset the executable permission
    vim.fn.system("chmod -x " .. current_file)
    --print(current_file .. ' is no longer executable.')
    print("No longer executable")
  else
    -- File is not executable, set the executable permission
    vim.fn.system("chmod +x " .. current_file)
    --print(current_file .. ' is now executable.')
    print("Now executable")
  end
end

--------------------------------------------------

-- Set bare dotfiles repository git environment variables dynamically

-- Set git enviornment variables
--function M.Set_git_env_vars()
--  local git_dir_job = vim.fn.jobstart({ "git", "rev-parse", "--git-dir" })
--  local command_status = vim.fn.jobwait({ git_dir_job })[1]
--  if command_status > 0 then
--    vim.env.GIT_DIR = vim.fn.expand("$HOME/.cfg")
--    vim.env.GIT_WORK_TREE = vim.fn.expand("~")
--  else
--    vim.env.GIT_DIR = nil
--    vim.env.GIT_WORK_TREE = nil
--  end
--  -- Launch terminal emulator with Git environment variables set
--  --require("toggleterm").exec(string.format([[%s %s]], os.getenv("SHELL"), "-i"))
--end

------

local prev_cwd = ""

function M.Set_git_env_vars()
  local cwd = vim.fn.getcwd()
  if prev_cwd == "" then
    -- First buffer being opened, set prev_cwd to cwd
    prev_cwd = cwd
  elseif cwd ~= prev_cwd then
    -- Working directory has changed since last buffer was opened
    prev_cwd = cwd
    local git_dir_job = vim.fn.jobstart({ "git", "rev-parse", "--git-dir" })
    local command_status = vim.fn.jobwait({ git_dir_job })[1]
    if command_status > 0 then
      vim.env.GIT_DIR = vim.fn.expand("$HOME/.cfg")
      vim.env.GIT_WORK_TREE = vim.fn.expand("~")
    else
      vim.env.GIT_DIR = nil
      vim.env.GIT_WORK_TREE = nil
    end
  end
end

vim.cmd([[augroup my_git_env_vars]])
vim.cmd([[  autocmd!]])
vim.cmd([[  autocmd BufEnter * lua require('user.mods').Set_git_env_vars()]])
vim.cmd([[  autocmd VimEnter * lua require('user.mods').Set_git_env_vars()]])
vim.cmd([[augroup END]])

--------------------------------------------------

--- Update Tmux Status Vi-mode
function M.update_tmux_status()
  local mode = vim.api.nvim_eval("mode()")
  -- Determine the mode name based on the mode value
  local mode_name
  if mode == "n" then
    mode_name = "-- NORMAL --"
  elseif mode == "i" or mode == "ic" then
    mode_name = "-- INSERT --"
  else
    mode_name = "-- NORMAL --" --'-- COMMAND --'
  end

  -- Write the mode name to the file
  local file = io.open(os.getenv("HOME") .. "/.vi-mode", "w")
  file:write(mode_name)
  file:close()
  if nvim_running then
    -- Neovim is running, update the mode file and refresh tmux
    VI_MODE = "" -- Clear VI_MODE to show Neovim mode
    vim.cmd("silent !tmux refresh-client -S")
  end
  ---- Force tmux to update the status
  vim.cmd("silent !tmux refresh-client -S")
end

vim.cmd([[
  augroup TmuxStatus
    autocmd!
    autocmd InsertLeave,InsertEnter * lua require("user.mods").update_tmux_status()
    autocmd VimEnter * lua require("user.mods").update_tmux_status()
    autocmd BufEnter * lua require("user.mods").update_tmux_status()
    autocmd ModeChanged * lua require("user.mods").update_tmux_status()
    autocmd WinEnter,WinLeave * lua require("user.mods").update_tmux_status()
  augroup END
]])

-- Add autocmd for <esc>
-- Add autocmd to check when tmux switches panes/windows
--autocmd InsertLeave,InsertEnter * lua require("user.mods").update_tmux_status()
--autocmd BufEnter * lua require("user.mods").update_tmux_status()
--autocmd WinEnter,WinLeave * lua require("user.mods").update_tmux_status()

--autocmd WinEnter,WinLeave * lua require("user.mods").update_tmux_status()
--autocmd VimResized * lua require("user.mods").update_tmux_status()
--autocmd FocusGained * lua require("user.mods").update_tmux_status()
--autocmd FocusLost * lua require("user.mods").update_tmux_status()
--autocmd CmdwinEnter,CmdwinLeave * lua require("user.mods").update_tmux_status()

--------------------------------------------------

-- function OpenEmulatorList()
-- 	local emulatorsBuffer = vim.api.nvim_create_buf(false, true)
-- 	vim.api.nvim_buf_set_lines(emulatorsBuffer, 0, 0, true, {"Some text"})
-- 	vim.api.nvim_open_win(
-- 		emulatorsBuffer,
-- 		false,
-- 		{
-- 			relative='win', row=3, col=3, width=12, height=3
-- 		}
-- 	)
-- end
--
-- vim.api.nvim_create_user_command('OpenEmulators', OpenEmulatorList, {})

--local api = vim.api
--local fn = vim.fn
--local cmd = vim.cmd
--
--local function bufremove(opts)
--  local target_buf_id = api.nvim_get_current_buf()
--
--  -- Do nothing if buffer is in modified state.
--  if not opts.force and api.nvim_buf_get_option(target_buf_id, 'modified') then
--    return false
--  end
--
--  -- Hide target buffer from all windows.
--  vim.tbl_map(function(win_id)
--    win_id = win_id or 0
--
--    local current_buf_id = api.nvim_win_get_buf(win_id)
--
--    api.nvim_win_call(win_id, function()
--      -- Try using alternate buffer
--      local alt_buf_id = fn.bufnr('#')
--      if alt_buf_id ~= current_buf_id and fn.buflisted(alt_buf_id) == 1 then
--        api.nvim_win_set_buf(win_id, alt_buf_id)
--        return
--      end
--
--      -- Try using previous buffer
--      cmd('bprevious')
--      if current_buf_id ~= api.nvim_win_get_buf(win_id) then
--        return
--      end
--
--      -- Create new listed scratch buffer
--      local new_buf = api.nvim_create_buf(true, true)
--      api.nvim_win_set_buf(win_id, new_buf)
--    end)
--
--    return true
--  end, fn.win_findbuf(target_buf_id))
--
--  cmd(string.format('bdelete%s %d', opts.force and '!' or '', target_buf_id))
--end
--
---- Assign bufremove to a global variable
--_G.bufremove = bufremove

--vim.cmd([[
--  augroup NvimTreeDelete
--    autocmd!
--    autocmd FileType NvimTree lua require('user.mods').enew_on_delete()
--  augroup END
--]])
--
--function M.enew_on_delete()
--  if vim.bo.buftype == 'nofile' then
--    vim.cmd('enew')
--  end
--end

-- Update Neovim
--function M.Update_neovim()
--  -- Run the commands to download and extract the latest version
--  os.execute("curl -L -o nvim-linux64.tar.gz https://github.com/neovim/neovim/releases/latest/download/nvim-linux64.tar.gz")
--  os.execute("tar xzvf nvim-linux64.tar.gz")
--  -- Replace the existing Neovim installation with the new version
--  os.execute("rm -rf $HOME/.local/bin/nvim")
--  os.execute("mv nvim-linux64 $HOME/.local/bin/nvim")
--
--  -- Clean up the downloaded file
--  os.execute("rm nvim-linux64.tar.gz")
--
--  -- Print a message to indicate the update is complete
--  print("Neovim has been updated to the latest version.")
--end
--
---- Bind a keymap to the update_neovim function (optional)
--vim.api.nvim_set_keymap('n', '<leader>u', '<cmd> lua require("user.mods").Update_neovim()<CR>', { noremap = true, silent = true })

-- Define a function to create a floating window and run the update process inside it
function M.Update_neovim()
  -- Create a new floating window
  local bufnr, winid = vim.api.nvim_create_buf(false, true)
  vim.api.nvim_open_win(bufnr, true, {
    relative = "editor",
    width = 80,
    height = 20,
    row = 2,
    col = 2,
    style = "minimal",
    border = "single",
  })

  -- Function to append a line to the buffer in the floating window
  local function append_line(line)
    vim.api.nvim_buf_set_option(bufnr, "modifiable", true)
    vim.api.nvim_buf_set_lines(bufnr, -1, -1, false, { line })
    vim.api.nvim_buf_set_option(bufnr, "modifiable", false)
  end

  -- Download the latest version of Neovim
  append_line("Downloading the latest version of Neovim...")
  os.execute("curl -L -o nvim-linux64.tar.gz https://github.com/neovim/neovim/releases/latest/download/nvim-linux64.tar.gz")
  append_line("Download complete.")

  -- Extract the downloaded archive
  append_line("Extracting the downloaded archive...")
  os.execute("tar xzvf nvim-linux64.tar.gz")
  append_line("Extraction complete.")

  -- Replace the existing Neovim installation with the new version
  append_line("Replacing the existing Neovim installation...")
  os.execute("rm -rf $HOME/nvim")
  os.execute("mv nvim-linux64 $HOME/nvim")
  append_line("Update complete.")

  -- Clean up the downloaded file
  append_line("Cleaning up the downloaded file...")
  os.execute("rm nvim-linux64.tar.gz")
  append_line("Cleanup complete.")

  -- Close the floating window after a delay
  vim.defer_fn(function()
    vim.api.nvim_win_close(winid, true)
  end, 5000) -- Adjust the delay as needed
end

-- Bind a keymap to the update_neovim function (optional)
vim.api.nvim_set_keymap("n", "<leader>U", '<cmd> lua require("user.mods").Update_neovim()<CR>', { noremap = true, silent = true })

--------------------------------------------------

-- Fix closing nvim error message (/src/unix/core.c:147: uv_close: Assertion `!uv__is_closing(handle)' failed.)
vim.api.nvim_create_autocmd({ "VimLeave" }, {
  callback = function()
    vim.cmd("silent! !notify-send 'hello' >/dev/null 2>&1 &")
  end,
})

--------------------------------------------------

vim.cmd([[autocmd BufEnter * lua vim.cmd('Rooter')]])

-- nvim-tree is also there in modified buffers so this function filter it out
local modifiedBufs = function(bufs)
  local t = 0
  for k, v in pairs(bufs) do
    if v.name:match("NvimTree_") == nil then
      t = t + 1
    end
  end
  return t
end

function M.DeleteCurrentBuffer()
  local cbn = vim.api.nvim_get_current_buf()
  local buffers = vim.fn.getbufinfo({ buflisted = true })
  local size = #buffers
  local idx = 0

  for n, e in ipairs(buffers) do
    if e.bufnr == cbn then
      idx = n
      break -- Exit loop as soon as we find the buffer
    end
  end

  if idx == 0 then
    return
  end

  if idx == size then
    vim.cmd("bprevious")
  else
    vim.cmd("bnext")
  end

  vim.cmd("silent! bdelete " .. cbn)

  -- Open a new blank window
  vim.cmd("silent! enew") -- Opens a new vertical split
  -- OR
  -- vim.cmd("new")  -- Opens a new horizontal split
  -- Delay before opening a new split
  --vim.defer_fn(function()
  --  vim.cmd("enew") -- Opens a new vertical split
  --end, 100)         -- Adjust the delay as needed (in milliseconds)
  -- Delay before closing the nvim-tree window
end

--
vim.cmd([[autocmd FileType NvimTree lua require("user.mods").DeleteCurrentBuffer()]])
-- On :bd nvim-tree should behave as if it wasn't opened
vim.api.nvim_create_autocmd("BufEnter", {
  nested = true,
  callback = function()
    -- Only 1 window with nvim-tree left: we probably closed a file buffer
    if #vim.api.nvim_list_wins() == 1 and require("nvim-tree.utils").is_nvim_tree_buf() then
      local api = require("nvim-tree.api")
      -- Required to let the close event complete. An error is thrown without this.
      vim.defer_fn(function()
        -- close nvim-tree: will go to the last buffer used before closing
        api.tree.toggle({ find_file = true, focus = true })
        -- re-open nivm-tree
        api.tree.toggle({ find_file = true, focus = true })
        -- nvim-tree is still the active window. Go to the previous window.
        vim.cmd("wincmd p")
      end, 0)
    end
  end,
})

-- Autocmd to dismiss notifications when opening nvim-tree window
local function isNvimTreeOpen()
  local win = vim.fn.win_findbuf(vim.fn.bufnr("NvimTree"))
  return vim.fn.empty(win) == 0
end

function M.DisableNotify()
  if isNvimTreeOpen() then
    require("notify").dismiss()
  end
end

vim.cmd([[
  autocmd! WinEnter,WinLeave * lua require('user.mods').DisableNotify()
]])

return M