extends Node

const OLLAMA_URL: String = "http://127.0.0.1:11434/api/generate"
const DEFAULT_MODEL: String = "mistral-nemo"
const REQUEST_TIMEOUT: float = 25.0

var _http: HTTPRequest
var _pending: Dictionary = {}
var _pending_target: Node = null

func _ready() -> void:
  _http = HTTPRequest.new()
  _http.timeout = REQUEST_TIMEOUT
  add_child(_http)
  _http.request_completed.connect(_on_response)

func ask(npc: Node, player: Node, question: String) -> void:
  if not (multiplayer.is_server() or multiplayer.multiplayer_peer == null):
    request_ask.rpc_id(1, npc.get_path(), player.get_path(), question)
    return
  var profile: NpcProfile = npc.profile
  var world_context: String = GameLore.build_npc_context(profile)
  var system_prompt: String = "%s\n\nDU BIST:\nName: %s\nHintergrund: %s\nPersönlichkeit: %s\n\nREGELN:\n- Antworte kurz: maximal 2 Sätze.\n- Antworte auf Deutsch.\n- Bleibe in deiner Rolle, schreibe NIE 'Als KI...' oder Ähnliches.\n- Nutze die WELT-Begriffe (Schlund, Atemzug, Reisender, Anker, Anderseite).\n- Wenn dich etwas gefragt wird, das du nicht wissen kannst, sag das ehrlich.\n- Erfinde keine Fakten, die nicht in der WELT stehen." % [world_context, profile.display_name, profile.lore, profile.personality]
  var prompt: String = "Reisender: %s\n%s:" % [question, profile.display_name]
  _send_request(npc, player, system_prompt, prompt)

@rpc("any_peer", "reliable")
func request_ask(npc_path: NodePath, player_path: NodePath, question: String) -> void:
  var npc: Node = get_node_or_null(npc_path)
  var player: Node = get_node_or_null(player_path)
  if npc and player:
    ask(npc, player, question)

func _send_request(npc: Node, player: Node, system_prompt: String, prompt: String) -> void:
  var body: Dictionary = {
    "model": DEFAULT_MODEL,
    "prompt": prompt,
    "system": system_prompt,
    "stream": false,
    "options": {"temperature": 0.7, "num_predict": 120}
  }
  var headers := PackedStringArray(["Content-Type: application/json"])
  var json := JSON.stringify(body)
  var token: int = randi()
  _pending[token] = {"npc": npc, "player": player}
  _pending_target = player
  var err := _http.request(OLLAMA_URL, headers, HTTPClient.METHOD_POST, json)
  if err != OK:
    _send_fallback(npc, player)

func _on_response(result: int, response_code: int, _headers: PackedStringArray, body: PackedByteArray) -> void:
  var entry_keys: Array = _pending.keys()
  if entry_keys.is_empty():
    return
  var token: int = entry_keys[0]
  var entry: Dictionary = _pending[token]
  _pending.erase(token)
  var npc: Node = entry.npc
  var player: Node = entry.player
  if result != HTTPRequest.RESULT_SUCCESS or response_code != 200:
    _send_fallback(npc, player)
    return
  var text: String = body.get_string_from_utf8()
  var data: Variant = JSON.parse_string(text)
  if typeof(data) != TYPE_DICTIONARY or not "response" in data:
    _send_fallback(npc, player)
    return
  var answer: String = (data.response as String).strip_edges()
  if answer == "":
    _send_fallback(npc, player)
    return
  _deliver(player, npc, answer)

func _send_fallback(npc: Node, player: Node) -> void:
  if not is_instance_valid(npc):
    return
  var profile: NpcProfile = npc.profile
  _deliver(player, npc, profile.fallback_text)

func _deliver(player: Node, npc: Node, text: String) -> void:
  if player == null or not is_instance_valid(player):
    return
  var auth: int = player.get_multiplayer_authority()
  _on_dialog_answer.rpc_id(auth, npc.get_path(), text)

@rpc("authority", "reliable", "call_local")
func _on_dialog_answer(npc_path: NodePath, text: String) -> void:
  var npc: Node = get_node_or_null(npc_path)
  if npc:
    EventBus.chat_message.emit(0, npc.profile.display_name if npc.has_method("get") else "NPC", text)
  for hud in get_tree().get_nodes_in_group("dialog_ui"):
    if hud.has_method("show_answer"):
      hud.show_answer(text)