# ServerManager.gd
extends Node

var server_path: String = ""
var running := false
var server_process_id: int = -50

var server_url = "http://localhost:27531"
func _ready():
    # Get the path to the server directory relative to the project
    server_path = ProjectSettings.globalize_path("res://Assets/ChessEngines/fairy-chess-server")
    start_server()
    get_tree().set_auto_accept_quit(false)

func _exit_tree():
    stop_server()
func _notification(what):
    if what == NOTIFICATION_WM_CLOSE_REQUEST:
        stop_server()
func start_server() -> bool:
    if running:
        return true
        
    print("Starting chess server...", server_path)
    
    # Make sure we're in the correct directory
    
    
    var http_request = HTTPRequest.new()
    add_child(http_request)
    # http_request.connect("request_completed", self._on_init_request_completed)
    http_request.request_completed.connect(self._on_init_request_completed)
    http_request.request(server_url + "/health")

    # var http = HTTPClient.new()
    # var err = http.connect_to_host("localhost", 27531)
    # print("is_server_running", err, OK)
    # if err != OK: 
    #     server_process_id = OS.create_process("node", [server_path + "/index.js"])
        
    #     if server_process_id <= 0:
    #         printerr("Failed to start server")
    #         return false
    
    
    # if exit_code != 0:
    #     printerr("Failed to start server: ", output)
    #     return false
    
    return true

func _on_init_request_completed(result: int, response_code: int, headers: PackedStringArray, body: PackedByteArray):
    print("*****************_on_init_request_completed************")
    var json = JSON.new()
    json.parse(body.get_string_from_utf8())
    var response = json.get_data()
    # Will print the user agent string used by the HTTPRequest node (as recognized by httpbin.org).
    print(response)
    if response == null and result != HTTPRequest.RESULT_SUCCESS:
        print("HTTP Request failed")
        server_process_id = OS.create_process("node", [server_path + "/index.js"])
        
        if server_process_id <= 0:
            printerr("Failed to start server")
            return false
        
        running = true
        print("Chess server started")
        return
    running = true
    if response.status != "ok":
        print("Server error    : ", response_code, json.parse(body.get_string_from_utf8()),)
        return
        

func stop_server():
    if not running:
        return
        
    print("Stopping chess server...")
    # Send a stop request to the server
    var headers = ["Content-Type: application/json"]
    var http = HTTPClient.new()
    var data = JSON.stringify({"command": "shutdown"})
    http.request(HTTPClient.METHOD_POST, "/shutdown", headers, data)
    
    running = false
    print("Chess server stopped")

func is_server_running() -> bool:
    return running