import logging,os,uuid,asyncio,torch
# sanic imports
from sanic import Sanic, json, Blueprint,response
from sanic.exceptions import Unauthorized
from sanic.response import json as json_response
from sanic_cors import CORS
# ourself imports
from ai_image import process_images
from map_find import map_process_images
from yolo_train import train_main
from yolo_photo import map_process_images_with_progress 
from pydantic import BaseModel, ValidationError
from typing import List, Dict
import threading
import torch
import uuid
from queue import Queue


# set up logging
logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(name)s - %(levelname)s - %(message)s')
logger = logging.getLogger(__name__)

###################################################################################验证中间件和管理件##############################################################################################

async def token_and_resource_check(request):
    # --- Token 验证 ---
    token = request.headers.get('X-API-Token')
    expected_token = request.app.config.get("VALID_TOKEN")
    if not token or token != expected_token:
        logger.warning(f"Unauthorized request with token: {token}")
        raise Unauthorized("Invalid token")

    # --- GPU 使用率检查 ---
    try:
        if torch.cuda.is_available():
            num_gpus = torch.cuda.device_count()            
            max_usage_ratio = request.app.config.get("MAX_GPU_USAGE", 0.9)  # 默认90%

            for i in range(num_gpus):
                used = torch.cuda.memory_reserved(i)
                total = torch.cuda.max_memory_reserved(i)
                ratio = used / total if total else 0

                logger.info(f"GPU {i} Usage: {ratio:.2%}")

                if ratio > max_usage_ratio:
                    logger.warning(f"GPU {i} usage too high: {ratio:.2%}")
                    return json_response({
                        "status": "error",
                        "message": f"GPU resource busy (GPU {i} at {ratio:.2%}). Try later."
                    }, status=503)
    except Exception as e:
        logger.error(f"GPU check failed: {e}")

    return None  # 允许请求继续

################################################################# set up app and blueprints ########################################################################################################
# create app and cors
app = Sanic("ai_Service_v2")
CORS(app) # 允许跨域请求
task_progress = {}

@app.middleware("request")
async def global_middleware(request):
    result = await token_and_resource_check(request)
    if result:
        return result

# 配置Token和最大GPU使用率
app.config.update({
    "VALID_TOKEN": "Beidou_b8609e96-bfec-4485-8c64-6d4f662ee44a",
    "MAX_GPU_USAGE": 0.9
})
    
######################################################################地图切割相关的API########################################################################################################
#创建地图的蓝图
map_tile_blueprint = Blueprint('map', url_prefix='/map/')
app.blueprint(map_tile_blueprint)

#语义识别
@map_tile_blueprint.post("/uav")
async def process_handler(request):
    """
    接口：/map/uav
    输入 JSON:
    {
    "urls": [
        "http://example.com/img1.jpg",
        "http://example.com/img2.jpg"
    ],
    "yaml_name": "config",
    "bucket_name": "300bdf2b-a150-406e-be63-d28bd29b409f",
    "bucket_directory": "2025/seg"
    "model_path": "deeplabv3plus_best.pth"
    }
    输出 JSON:
        {
    "code": 200,
    "msg": "success",
    "data": [
        "http://minio.example.com/uav-results/2025/seg/result1.png",
        "http://minio.example.com/uav-results/2025/seg/result2.png"
    ]
    }
    
    """
    try:
        body = request.json
        urls = body.get("urls", [])
        yaml_name = body.get("yaml_name")
        bucket_name = body.get("bucket_name")
        bucket_directory = body.get("bucket_directory")
        model_path = os.path.join("map", "checkpoints", body.get("model_path"))

        # 校验参数
        if not urls or not isinstance(urls, list):
            return json({"code": 400, "msg": "Missing or invalid 'urls'"})
        if not all([yaml_name, bucket_name, bucket_directory]):
            return json({"code": 400, "msg": "Missing required parameters"})

        # 调用图像处理函数
        result = map_process_images(urls, yaml_name, bucket_name, bucket_directory,model_path)
        return json(result)

    except Exception as e:
        return json({"code": 500, "msg": f"Server error: {str(e)}"})
    
######################################################################yolo相关的API########################################################################################################
#创建yolo的蓝图
yolo_tile_blueprint = Blueprint('yolo', url_prefix='/yolo/')
app.blueprint(yolo_tile_blueprint)

# YOLO URL APT
# save the task progress in memory

@yolo_tile_blueprint.post("/process_images")
async def process_images(request):
    """
    {
  "urls": [
    "http://example.com/image1.jpg",
    "http://example.com/image2.jpg",
    "http://example.com/image3.jpg"
  ],
  "yaml_name": "your_minio_config",
  "bucket_name": "my-bucket",
  "bucket_directory": "2025/uav-results",
  "model_path": "deeplabv3plus_best.pth"
}
    """
    data = request.json
    urls = data.get("urls")
    yaml_name = data.get("yaml_name")
    bucket_name = data.get("bucket_name")
    bucket_directory = data.get("bucket_directory")
    uav_model_path = data.get("uav_model_path")

    if not urls or not yaml_name or not bucket_name or not uav_model_path:
        return response.json({"code": 400, "msg": "Missing parameters"}, status=400)

    task_id = str(uuid.uuid4())
    task_progress[task_id] = {"status": "pending", "progress": 0, "result": None}

    # 启动后台任务
    asyncio.create_task(run_image_processing(task_id, urls, yaml_name, bucket_name, bucket_directory, uav_model_path))

    return response.json({"code": 200, "msg": "Task started", "task_id": task_id})

@yolo_tile_blueprint.get("/task_status/<task_id>")
async def task_status(request, task_id):
    progress = task_progress.get(task_id)
    if not progress:
        return response.json({"code": 404, "msg": "Task not found"}, status=404)
    return response.json({"code": 200, "msg": "Task status", "data": progress})

async def run_image_processing(task_id, urls, yaml_name, bucket_name, bucket_directory, uav_model_path):
   

    try:
        task_progress[task_id]["status"] = "running"
        task_progress[task_id]["progress"] = 10  # 开始进度

        # 下载、推理、上传阶段分别更新进度
        def progress_callback(stage, percent):
            task_progress[task_id]["status"] = stage
            task_progress[task_id]["progress"] = percent

        result = await asyncio.to_thread(
            map_process_images_with_progress,
            urls, yaml_name, bucket_name, bucket_directory, uav_model_path, progress_callback
        )

        task_progress[task_id]["status"] = "completed"
        task_progress[task_id]["progress"] = 100
        task_progress[task_id]["result"] = result

    except Exception as e:
        task_progress[task_id]["status"] = "failed"
        task_progress[task_id]["progress"] = 100
        task_progress[task_id]["result"] = str(e)
        
# YOLO detect API
@yolo_tile_blueprint.post("/picture")
async def yolo_detect_api(request):
    try:
        
        detect_data = request.json
        
        # 
        image_list = detect_data.get("image_list")
        yolo_model = detect_data.get("yolo_model", "best.pt")
        class_filter = detect_data.get("class", None)
        minio_info = detect_data.get("minio", None)

        if not image_list:
            return json_response({"status": "error", "message": "image_list is required"}, status=400)

        if not minio_info:
            return json_response({"status": "error", "message": "MinIO information is required"}, status=400)

        # Create a temporary directory for input and output images
        input_folder = f"./temp_input_{str(uuid.uuid4())}"
        output_folder = f"./temp_output_{str(uuid.uuid4())}"
        
        # Execute the image processing in a separate thread to avoid blocking the event loop
        result = await asyncio.to_thread(
            process_images,
            yolo_model=yolo_model,
            image_list=image_list,
            class_filter=class_filter,
            input_folder=input_folder,
            output_folder=output_folder,
            minio_info=minio_info
        )

        # return the result as JSON response
        return json_response(result)

    except Exception as e:
        logger.error(f"Error occurred while processing request: {str(e)}", exc_info=True)
        return json_response({
            "status": "error",
            "message": f"Internal server error: {str(e)}"
        }, status=500)
        
#--------------------------------------------------------------------------yolo训练相关的API----------------------------------------------------------------########################################
#创建yolo训练的蓝图

MAX_CONCURRENT_JOBS = torch.cuda.device_count() if torch.cuda.is_available() else 1
tasks: Dict[str, Dict] = {}
task_queue = Queue()
active_jobs: List[str] = []
lock = threading.Lock()


# ------------------ 参数模型 ------------------
class TrainRequest(BaseModel):
    config_name: str
    table_name: str
    column_name: str
    search_condition: str
    aim_path: str
    image_dir: str
    label_dir: str
    output_path: str
    pt_path: str
    imgsz: int
    epochs: int
    device: List[int]
    hsv_v: float
    cos_lr: bool
    batch: int
    project_dir: str
    class_names: List[str]


# ------------------ 核心执行函数 ------------------
def run_training(task_id: str, params: TrainRequest):
    try:
        with lock:
            active_jobs.append(task_id)
            tasks[task_id]["status"] = "running"

        train_main(
            config_name=params.config_name,
            table_name=params.table_name,
            column_name=params.column_name,
            search_condition=params.search_condition,
            aim_path=params.aim_path,
            image_dir=params.image_dir,
            label_dir=params.label_dir,
            output_path=params.output_path,
            pt_path=params.pt_path,
            imgsz=params.imgsz,
            epochs=params.epochs,
            device=params.device,
            hsv_v=params.hsv_v,
            cos_lr=params.cos_lr,
            batch=params.batch,
            project_dir=params.project_dir,
            class_names=params.class_names
        )

        tasks[task_id]["status"] = "finished"
    except Exception as e:
        tasks[task_id]["status"] = "failed"
        tasks[task_id]["error"] = str(e)
    finally:
        with lock:
            if task_id in active_jobs:
                active_jobs.remove(task_id)
        schedule_next_job()


# ------------------ 调度器 ------------------
def schedule_next_job():
    with lock:
        while len(active_jobs) < MAX_CONCURRENT_JOBS and not task_queue.empty():
            next_id = task_queue.get()
            params = tasks[next_id]["params"]
            t = threading.Thread(target=run_training, args=(next_id, params), daemon=True)
            t.start()
# ------------------ 接口 ------------------
@yolo_tile_blueprint.post("/train")
async def submit_train_job(request):
    try:
        data = request.json
        params = TrainRequest(**data)
    except ValidationError as e:
        return json({"success": False, "error": e.errors()})

    task_id = str(uuid.uuid4())
    tasks[task_id] = {"status": "queued", "params": params}

    with lock:
        if len(active_jobs) < MAX_CONCURRENT_JOBS:
            t = threading.Thread(target=run_training, args=(task_id, params), daemon=True)
            t.start()
        else:
            task_queue.put(task_id)
            tasks[task_id]["status"] = "waiting"

    return json({"success": True, "task_id": task_id, "message": "任务已提交"})


@yolo_tile_blueprint.get("/task_status/<task_id>")
async def task_status(request, task_id: str):
    if task_id not in tasks:
        return json({"success": False, "message": "任务ID不存在"})

    task_info = tasks[task_id]
    return json({
        "success": True, 
        "status": task_info["status"],
        "error": task_info.get("error", None)
    })


@yolo_tile_blueprint.get("/tasks")
async def all_tasks(request):
    return json({
        tid: {"status": info["status"]}
        for tid, info in tasks.items()
    })


@yolo_tile_blueprint.get("/system_status")
async def system_status(request):
    gpu_available = torch.cuda.is_available()
    return json({
        "gpu_available": gpu_available,
        "max_concurrent": MAX_CONCURRENT_JOBS,
        "running_jobs": len(active_jobs),
        "waiting_jobs": task_queue.qsize(),
        "active_task_ids": active_jobs
    })
if __name__ == '__main__':
    app.run(host="0.0.0.0", port=12366, debug=True,workers=1)