import os
import requests
from flask import Flask, request, jsonify, send_from_directory
from flask_cors import CORS
import logging
from datetime import datetime
import threading
import queue
import uuid
import time

APP_ROOT = os.path.dirname(os.path.abspath(__file__))
STATIC_FOLDER = os.path.join(APP_ROOT, 'static')

app = Flask(__name__, static_folder=STATIC_FOLDER, static_url_path='/static')
CORS(app)

CHANGE_APP_BASE_URL = "http://127.0.0.1:28888"

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


def log_message(msg):
    print(f"[{datetime.now().strftime('%Y-%m-%d %H:%M:%S')}] {msg}")
    logger.info(msg)


class DualQueueProcessor:
    def __init__(self):
        self.normal_lock = threading.Lock()
        self.kuzi_lock = threading.Lock()
        self.normal_queue = queue.Queue()
        self.kuzi_queue = queue.Queue()
        self.normal_processing = 0
        self.kuzi_processing = 0
        self.normal_total = 0
        self.kuzi_total = 0
        self.stats_lock = threading.Lock()
        self._start_workers()

    def _start_workers(self):
        normal_worker = threading.Thread(target=self._process_normal_queue, daemon=True)
        normal_worker.start()
        
        kuzi_worker = threading.Thread(target=self._process_kuzi_queue, daemon=True)
        kuzi_worker.start()
        
        log_message("Dual queue workers started: normal_queue and kuzi_queue")

    def _process_normal_queue(self):
        while True:
            task_id, data, result_event, result_container = self.normal_queue.get()
            log_message(f"[Normal Queue] Processing task {task_id}, queue_size={self.normal_queue.qsize()}")
            
            try:
                response = requests.post(
                    f"{CHANGE_APP_BASE_URL}/change_cloth_base64",
                    json=data,
                    timeout=600
                )
                result_container['status_code'] = response.status_code
                result_container['json'] = response.json()
                result_container['success'] = True
                log_message(f"[Normal Queue] Task {task_id} completed with status {response.status_code}")
            except requests.exceptions.Timeout:
                result_container['success'] = False
                result_container['error'] = "Request timeout"
                log_message(f"[Normal Queue] Task {task_id} timeout")
            except requests.exceptions.RequestException as e:
                result_container['success'] = False
                result_container['error'] = str(e)
                log_message(f"[Normal Queue] Task {task_id} error: {str(e)}")
            finally:
                result_event.set()
                self.normal_queue.task_done()

    def _process_kuzi_queue(self):
        while True:
            task_id, data, result_event, result_container = self.kuzi_queue.get()
            log_message(f"[Kuzi Queue] Processing task {task_id}, queue_size={self.kuzi_queue.qsize()}")
            
            try:
                response = requests.post(
                    f"{CHANGE_APP_BASE_URL}/change_cloth_base64",
                    json=data,
                    timeout=600
                )
                result_container['status_code'] = response.status_code
                result_container['json'] = response.json()
                result_container['success'] = True
                log_message(f"[Kuzi Queue] Task {task_id} completed with status {response.status_code}")
            except requests.exceptions.Timeout:
                result_container['success'] = False
                result_container['error'] = "Request timeout"
                log_message(f"[Kuzi Queue] Task {task_id} timeout")
            except requests.exceptions.RequestException as e:
                result_container['success'] = False
                result_container['error'] = str(e)
                log_message(f"[Kuzi Queue] Task {task_id} error: {str(e)}")
            finally:
                result_event.set()
                self.kuzi_queue.task_done()

    def submit_request(self, data):
        has_kuzi = data.get('kuzi_img') is not None and data.get('kuzi_img') != ''
        task_id = str(uuid.uuid4())[:8]
        result_event = threading.Event()
        result_container = {'success': False}
        
        if has_kuzi:
            with self.stats_lock:
                self.kuzi_total += 1
                queue_position = self.kuzi_queue.qsize() + 1
            self.kuzi_queue.put((task_id, data, result_event, result_container))
            log_message(f"[Kuzi Queue] Task {task_id} submitted, position={queue_position}")
            queue_name = "kuzi"
        else:
            with self.stats_lock:
                self.normal_total += 1
                queue_position = self.normal_queue.qsize() + 1
            self.normal_queue.put((task_id, data, result_event, result_container))
            log_message(f"[Normal Queue] Task {task_id} submitted, position={queue_position}")
            queue_name = "normal"
        
        return task_id, result_event, result_container, queue_name, queue_position

    def get_stats(self):
        with self.stats_lock:
            return {
                "normal_queue_size": self.normal_queue.qsize(),
                "kuzi_queue_size": self.kuzi_queue.qsize(),
                "normal_total": self.normal_total,
                "kuzi_total": self.kuzi_total
            }


dual_queue = DualQueueProcessor()


@app.route('/')
def index():
    return send_from_directory(STATIC_FOLDER, 'index.html')


@app.route('/health', methods=['GET'])
def health():
    return jsonify({"status": "ok", "service": "change_cloth_proxy"})


@app.route('/queue_stats', methods=['GET'])
def queue_stats():
    stats = dual_queue.get_stats()
    return jsonify({
        "ret": 0,
        "msg": "success",
        "data": stats
    })


@app.route('/change_cloth', methods=['POST'])
def change_cloth():
    log_message("change_cloth called")
    data = request.get_json()
    if not data:
        return jsonify({"ret": -1, "state": -1, "msg": "No JSON data provided"}), 400

    required_fields = ["human_url", "cloth_url", "output_format"]
    for field in required_fields:
        if field not in data:
            return jsonify({"ret": -1, "state": -1, "msg": f"Missing required field: {field}"}), 400

    log_message(f"Forwarding change_cloth request: human_url={data.get('human_url')}, cloth_url={data.get('cloth_url')}")

    try:
        response = requests.post(
            f"{CHANGE_APP_BASE_URL}/change_cloth",
            json=data,
            timeout=600
        )
        log_message(f"change_cloth response status: {response.status_code}")
        return jsonify(response.json()), response.status_code
    except requests.exceptions.Timeout:
        log_message("change_cloth request timeout")
        return jsonify({"ret": -1, "state": -1, "msg": "Request timeout"}), 504
    except requests.exceptions.RequestException as e:
        log_message(f"change_cloth request error: {str(e)}")
        return jsonify({"ret": -1, "state": -1, "msg": f"Request failed: {str(e)}"}), 500


@app.route('/change_cloth_base64', methods=['POST'])
def change_cloth_base64():
    log_message("change_cloth_base64 called")
    data = request.get_json()
    if not data:
        return jsonify({"ret": -1, "state": -1, "msg": "No JSON data provided"}), 400

    required_fields = ["human_img", "cloth_img", "output_format"]
    for field in required_fields:
        if field not in data:
            return jsonify({"ret": -1, "state": -1, "msg": f"Missing required field: {field}"}), 400

    has_kuzi = data.get('kuzi_img') is not None and data.get('kuzi_img') != ''
    queue_type = "kuzi" if has_kuzi else "normal"
    
    task_id, result_event, result_container, queue_name, queue_position = dual_queue.submit_request(data)
    
    log_message(f"Task {task_id} queued in {queue_name} queue, position={queue_position}, waiting for result...")
    
    if result_event.wait(timeout=610):
        if result_container.get('success'):
            log_message(f"Task {task_id} returned successfully")
            return jsonify(result_container['json']), result_container['status_code']
        else:
            error_msg = result_container.get('error', 'Unknown error')
            log_message(f"Task {task_id} failed: {error_msg}")
            return jsonify({"ret": -1, "state": -1, "msg": error_msg}), 500
    else:
        log_message(f"Task {task_id} timed out waiting in queue")
        return jsonify({"ret": -1, "state": -1, "msg": "Queue timeout"}), 504


@app.route('/do_change_cloth', methods=['POST'])
def do_change_cloth():
    log_message("do_change_cloth called")
    data = request.get_json()
    if not data:
        return jsonify({"ret": -1, "state": -1, "msg": "No JSON data provided"}), 400

    required_fields = ["human_url", "cloth_url", "output_format"]
    for field in required_fields:
        if field not in data:
            return jsonify({"ret": -1, "state": -1, "msg": f"Missing required field: {field}"}), 400

    log_message(f"Forwarding do_change_cloth request: human_url={data.get('human_url')}, cloth_url={data.get('cloth_url')}")

    try:
        response = requests.post(
            f"{CHANGE_APP_BASE_URL}/do_change_cloth",
            json=data,
            timeout=600
        )
        log_message(f"do_change_cloth response status: {response.status_code}")
        return jsonify(response.json()), response.status_code
    except requests.exceptions.Timeout:
        log_message("do_change_cloth request timeout")
        return jsonify({"ret": -1, "state": -1, "msg": "Request timeout"}), 504
    except requests.exceptions.RequestException as e:
        log_message(f"do_change_cloth request error: {str(e)}")
        return jsonify({"ret": -1, "state": -1, "msg": f"Request failed: {str(e)}"}), 500


if __name__ == '__main__':
    log_message(f"Starting change_cloth_proxy service on port 5000, forwarding to {CHANGE_APP_BASE_URL}")
    app.run(host="0.0.0.0", port=5000, debug=True, threaded=True)