-- mod-version:2 -- lite-xl 2.0
local core = require "core"
local config = require "core.config"
local style = require "core.style"
local StatusView = require "core.statusview"
local scan_rate = config.project_scan_rate or 5


local git = {
  branch = nil,
  inserts = 0,
  deletes = 0,
}


local function exec(cmd, wait)
  local proc = process.start(cmd)
  proc:wait(wait * 1000)
	local res = proc:read_stdout()
  return res
end


core.add_thread(function()
  while true do
    if system.get_file_info(".git") then
      -- get branch name
      git.branch = exec({"git", "rev-parse", "--abbrev-ref", "HEAD"}, 1):match("[^\n]*")

      -- get diff
      local line = exec({"git", "diff", "--stat"}, 1):match("[^\n]*%s*$")
      git.inserts = tonumber(line:match("(%d+) ins")) or 0
      git.deletes = tonumber(line:match("(%d+) del")) or 0

    else
      git.branch = nil
    end

    coroutine.yield(scan_rate)
  end
end)


local get_items = StatusView.get_items

function StatusView:get_items()
  if not git.branch then
    return get_items(self)
  end
  local left, right = get_items(self)

  local t = {
    style.dim, self.separator,
    (git.inserts ~= 0 or git.deletes ~= 0) and style.accent or style.text,
    git.branch,
    style.dim, "  ",
    git.inserts ~= 0 and style.accent or style.text, "+", git.inserts,
    style.dim, " / ",
    git.deletes ~= 0 and style.accent or style.text, "-", git.deletes,
  }
  for _, item in ipairs(t) do
    table.insert(right, item)
  end

  return left, right
end