import std/osproc
import std/os
import std/streams
import std/strutils
import pkg/codex/conf
import pkg/codex/logutils
import pkg/confutils
import pkg/libp2p
import pkg/questionable
import ./codexclient

export codexclient

const workingDir = currentSourcePath() / ".." / ".." / ".."
const executable = "build" / "codex"

type
  NodeProcess* = ref object
    process: Process
    arguments: seq[string]
    debug: bool
    client: ?CodexClient

proc start(node: NodeProcess) =
  if node.debug:
    node.process = osproc.startProcess(
      executable,
      workingDir,
      node.arguments,
      options={poParentStreams}
    )
  else:
    node.process = osproc.startProcess(
      executable,
      workingDir,
      node.arguments
    )

proc waitUntilOutput*(node: NodeProcess, output: string) =
  if node.debug:
    raiseAssert "cannot read node output when in debug mode"
  for line in node.process.outputStream.lines:
    if line.contains(output):
      return
  raiseAssert "node did not output '" & output & "'"

proc waitUntilStarted*(node: NodeProcess) =
  if node.debug:
    sleep(5_000)
  else:
    node.waitUntilOutput("Started codex node")

proc startNode*(args: openArray[string], debug: string | bool = false): NodeProcess =
  ## Starts a Codex Node with the specified arguments.
  ## Set debug to 'true' to see output of the node.
  let node = NodeProcess(arguments: @args, debug: ($debug != "false"))
  node.start()
  node

proc dataDir(node: NodeProcess): string =
  let config = CodexConf.load(cmdLine = node.arguments, quitOnFailure = false)
  config.dataDir.string

proc apiUrl(node: NodeProcess): string =
  let config = CodexConf.load(cmdLine = node.arguments, quitOnFailure = false)
  "http://" & config.apiBindAddress & ":" & $config.apiPort & "/api/codex/v1"

proc client*(node: NodeProcess): CodexClient =
  if client =? node.client:
    return client
  let client = CodexClient.new(node.apiUrl)
  node.client = some client
  client

proc stop*(node: NodeProcess) =
  if node.process != nil:
    node.process.terminate()
    discard node.process.waitForExit(timeout=5_000)
    node.process.close()
    node.process = nil
  if client =? node.client:
    node.client = none CodexClient
    client.close()

proc restart*(node: NodeProcess) =
  node.stop()
  node.start()
  node.waitUntilStarted()

proc removeDataDir*(node: NodeProcess) =
  removeDir(node.dataDir)