local res, dap = pcall(require, "dap")
if not res then
  return
end

dap.adapters.go = function(callback, config)
  local stdout = vim.loop.new_pipe(false)
  local handle
  local pid_or_err
  local host = config.host or "127.0.0.1"
  local port = config.port or "38697"
  local addr = string.format("%s:%s", host, port)
  local opts = {
    stdio = { nil, stdout },
    args = { "dap", "-l", addr },
    detached = true
  }
  handle, pid_or_err = vim.loop.spawn("dlv", opts, function(code)
    stdout:close()
    handle:close()
    if code ~= 0 then
      print("dlv exited with code", code)
    end
  end)
  assert(handle, "Error running dlv: " .. tostring(pid_or_err))
  stdout:read_start(function(err, chunk)
    assert(not err, err)
    if chunk then
      vim.schedule(function()
        require("dap.repl").append(chunk)
      end)
    end
  end)
  -- Wait for delve to start
  vim.defer_fn(
    function()
      callback({ type = "server", host = "127.0.0.1", port = port })
    end,
    100)
end

dap.configurations.go = {
  {
    type = "go",
    name = "Debug",
    request = "launch",
    program = "${file}",
  },
  {
    type = "go",
    name = "Debug Package",
    request = "launch",
    program = "${fileDirname}",
  },
  {
    type = "go",
    name = "Attach",
    mode = "local",
    request = "attach",
    processId = require("dap.utils").pick_process,
  },
  {
    type = "go",
    name = "Debug test",
    request = "launch",
    mode = "test",
    program = "${file}",
  },
  {
    type = "go",
    name = "Debug test (go.mod)",
    request = "launch",
    mode = "test",
    program = "./${relativeFileDirname}",
  }
}