import os
import threading
import socket
import logging
import psutil
import GPUtil
import platform

from flask import Flask, jsonify, request, send_from_directory
from flask_cors import CORS
from tensorboard import program
from PytorchBoot.utils.project_util import ProjectUtil
from PytorchBoot.stereotype import get_all_component_classes, get_all_component_comments
from PytorchBoot.application import application_class
from PytorchBoot.status import status_manager
from PytorchBoot.utils.log_util import Log
from PytorchBoot.utils.timer_util import Timer

app = Flask(__name__, static_folder="../client")
app.logger.setLevel("WARNING")
logging.getLogger("werkzeug").disabled = True
CORS(app)
root_path = os.getcwd()
ProjectUtil.scan_project(root_path)
configs = ProjectUtil.scan_configs(root_path)
running_tensorboard = {}


@app.route("/")
def serve_index():
    return send_from_directory(app.static_folder, "index.html")


@app.route("/<path:path>")
def serve_file(path):
    return send_from_directory(app.static_folder, path)


@app.route("/test", methods=["POST"])
def hello_world():
    return jsonify(message="Hello, World!")


@app.route("/project/structure", methods=["POST"])
def project_structure():
    component_info = {}
    for st, cls_dict in get_all_component_classes().items():
        component_info[st] = {k: v.__name__ for k, v in cls_dict.items()}
    comment_info = get_all_component_comments()
    app_info = {}
    for app_name, app_cls in application_class.items():
        app_info[app_name] = app_cls.__name__

    return jsonify(
        components=component_info,
        comments=comment_info,
        applications=app_info,
        configs=configs,
        root_path=root_path,
    )


@app.route("/project/run_app", methods=["POST"])
def run_application():
    data = request.json
    app_name = data.get("app_name")
    app_cls = application_class.get(app_name)

    if app_cls is None:
        Log.error(
            f"No class annotated with @PytorchBootApplication found with the name '{app_name}'.",
            True,
        )
        return jsonify(
            {
                "message": f"No application found with the name '{app_name}'",
                "status": "error",
            }
        )

    if not hasattr(app_cls, "start"):
        Log.error(
            "The class annotated with @PytorchBootApplication should have a 'start' method.",
            True,
        )
        return jsonify(
            {"message": "The class should have a 'start' method", "status": "error"}
        )

    def run_in_background():
        Log.info(f"Application '{app_cls.__name__}' started.")
        timer = Timer("Application")
        timer.start()
        status_manager.run_app(app_name, app_cls)
        app_cls.start()
        status_manager.end_app(app_name)
        timer.stop()
        Log.info(timer.get_elasped_time_str(Timer.HOURS))
        Log.success("Application finished.")

    threading.Thread(target=run_in_background).start()

    return jsonify(
        {"message": f"Application '{app_name}' is running now.", "status": "success"}
    )


@app.route("/project/get_status", methods=["POST"])
def get_status():
    cpu_info = {
        "model": platform.processor(),
        "usage_percent": psutil.cpu_percent(interval=1),
    }
    virtual_memory = psutil.virtual_memory()
    memory_info = {
        "used": round(virtual_memory.used / (1024**3), 3),
        "total": round(virtual_memory.total / (1024**3), 3),
    }

    gpus = GPUtil.getGPUs()
    gpu_info = []
    for gpu in gpus:
        gpu_info.append(
            {
                "name": gpu.name,
                "memory_used": gpu.memoryUsed,
                "memory_total": gpu.memoryTotal,
            }
        )

    return jsonify(
        curr_status=status_manager.get_status(),
        last_status=status_manager.get_last_status(),
        logs=status_manager.get_log(),
        progress=status_manager.get_progress(),
        running_apps=status_manager.get_running_apps(),
        cpu=cpu_info,
        memory=memory_info,
        gpus=gpu_info,
    )


@app.route("/project/set_status", methods=["POST"])
def set_status():
    status = request.json.get("status")
    progress = request.json.get("progress")
    if status:
        status_manager.set_status(
            app_name=status["app_name"],
            runner_name=status["runner_name"],
            key=status["key"],
            value=status["value"],
        )
    if progress:
        status_manager.set_progress(
            app_name=progress["app_name"],
            runner_name=progress["runner_name"],
            key=progress["key"],
            curr_value=progress["curr_value"],
            max_value=progress["max_value"],
        )
    return jsonify({"status": "success"})

@app.route("/project/add_log", methods=["POST"])
def add_log():
    log = request.json.get("log")
    Log.log(log["message"], log["log_type"])
    return jsonify({"status": "success"})

def find_free_port(start_port):
    """Find a free port starting from start_port."""
    port = start_port
    while True:
        with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:
            result = sock.connect_ex(("localhost", port))
            if result != 0:
                return port
        port += 1


def start_tensorboard(log_dir, port):
    """Starts TensorBoard in a separate thread."""
    tb = program.TensorBoard()
    tb.configure(argv=[None, "--logdir", log_dir, "--port", str(port)])
    tb.launch()


@app.route("/tensorboard/run", methods=["POST"])
def run_tensorboard():
    data = request.json
    log_dir = data.get("log_dir")
    if log_dir in running_tensorboard:
        return jsonify(
            {
                "message": f"TensorBoard ({running_tensorboard[log_dir]}) is already running for <{log_dir}>",
                "url": running_tensorboard[log_dir],
                "status": "warning",
            }
        )

    if not os.path.isdir(log_dir):
        return jsonify({"message": "Log directory does not exist", "status": "error"})

    port = find_free_port(10000)

    try:
        tb_thread = threading.Thread(target=start_tensorboard, args=(log_dir, port))
        tb_thread.start()
    except Exception as e:
        return jsonify(
            {"message": f"Error starting TensorBoard: {str(e)}", "status": "error"}
        )

    url = f"http://localhost:{port}"
    running_tensorboard[log_dir] = url
    return jsonify(
        {"url": url, "message": f"TensorBoard is running at {url}", "status": "success"}
    )


@app.route("/tensorboard/dirs", methods=["POST"])
def get_tensorboard_dirs():
    tensorboard_dirs = []
    for root, dirs, _ in os.walk(root_path):
        for dir_name in dirs:
            if dir_name == "tensorboard":
                tensorboard_dirs.append(os.path.join(root, dir_name))
    return jsonify({"tensorboard_dirs": tensorboard_dirs})


@app.route("/tensorboard/running_tensorboards", methods=["POST"])
def get_running_tensorboards():
    return jsonify(running_tensorboards=running_tensorboard)