local M = {}

CmdsList = nil

function M.checkCommand(cmd, desc)
  local toRun = ""

  if IS_UNIX then
    toRun = "command -v " .. cmd
  else
    toRun = "where " .. cmd
  end

  local p = io.popen(toRun)
  local output = p:read("*l")
  p:close()

  if output == nil and desc ~= nil and desc ~= "" then
    vim.api.nvim_echo({ { " ✗ " .. cmd .. " [" .. desc .. "] - not found!", "DiagnosticError" } }, true, {})
  elseif output == nil then
    vim.api.nvim_echo({ { " ✗ " .. cmd .. " not found!", "DiagnosticError" } }, true, {})
  else
    vim.api.nvim_echo({ { " ✓ " .. cmd, "DiagnosticOk" } }, true, {})
  end
end

function M.run()
  if CmdsList == nil or next(CmdsList) == nil then
    vim.api.nvim_echo({ { "Dependencies list passed is null or empty, nothing to check", "DiagnosticWarn" } }, true, {})
    return
  end

  print("Check installed system commands:")
  for _, cmd in ipairs(CmdsList) do
    M.checkCommand(cmd.cmd, cmd.desc)
  end
end

function M.setup(cmds)
  IS_UNIX = package.config:sub(1, 1) ~= "\\"
  CmdsList = cmds
end

return M