import json
import logging
from dataclasses import dataclass, field
from typing import Any
from urllib.parse import urlparse

from playwright.sync_api import Page, Request, Response

from ..core.config import Settings

logger = logging.getLogger("MOBILEDE_scraper.network")


@dataclass
class NetworkCapture:
    # Перехватчик сетевых запросов.

    settings: Settings
    requests: list[dict[str, Any]] = field(default_factory=list)
    json_responses: list[dict[str, Any]] = field(default_factory=list)
    _seen_req: set[str] = field(default_factory=set)
    _seen_resp: set[str] = field(default_factory=set)
    _origin: str | None = None
    _page: Any = field(default=None)

    def attach(self, page: Page, origin_url: str | None = None) -> None:
        # Снимаем старые подписки перед повторным attach.
        try:
            page.remove_listener("request", self._on_request)
            page.remove_listener("response", self._on_response)
        except Exception:
            pass
        # Подписка на сетевые события
        try:
            self._origin = urlparse(origin_url or page.url).netloc.lower() or None
        except Exception:
            self._origin = None
        self._page = page
        page.on("request", self._on_request)
        page.on("response", self._on_response)

    def _is_same_origin(self, url: str) -> bool:
        # Фильтр по домену
        if not self.settings.capture.capture_same_origin_only or not self._origin:
            return True
        netloc = urlparse(url).netloc.lower()
        return netloc == self._origin or netloc.endswith(".MOBILEDE.com")

    def _on_request(self, request: Request) -> None:
        # Берём только xhr/fetch
        if request.resource_type not in {"xhr", "fetch"}:
            return
        if not self._is_same_origin(request.url):
            return
        if len(self.requests) >= self.settings.capture.max_requests:
            return
        key = f"{request.method}:{request.url}:{request.post_data or ''}"
        # Убираем дубли
        if key in self._seen_req:
            return
        self._seen_req.add(key)
        self.requests.append({
            "url": request.url, "method": request.method,
            "resource_type": request.resource_type, "post_data": request.post_data,
        })

    def _on_response(self, response: Response) -> None:
        # Сохраняем JSON
        request = response.request
        if request.resource_type not in {"xhr", "fetch"}:
            return
        if not self._is_same_origin(response.url):
            return
        if len(self.json_responses) >= self.settings.capture.max_json_responses:
            return
        if not self._is_json(response):
            return
        key = f"{request.method}:{response.url}:{response.status}"
        if key in self._seen_resp:
            return
        self._seen_resp.add(key)
        try:
            payload = response.json()
        except Exception:
            try:
                payload = json.loads(response.text())
            except Exception:
                return
        self.json_responses.append({
            "url": response.url, "status": response.status,
            "request_method": request.method, "post_data": request.post_data,
            "resource_type": request.resource_type, "payload": payload,
            "category": self._categorize(response.url),
        })

    @staticmethod
    def _is_json(response: Response) -> bool:
        ct = (response.headers.get("content-type") or "").lower()
        if "application/json" in ct or "+json" in ct:
            return True
        url = response.url.lower()
        return any(m in url for m in ["/api/", "/graphql", "vehicledetail", "vehicle", "auction", "bid", "images", "media"])

    @staticmethod
    def _categorize(url: str) -> str:
        # Простая категория URL
        low = url.lower()
        mapping = {
            "images": ["image", "media", "photos", "gallery"],
            "bids": ["bid", "offer", "buy-now", "buynow"],
            "auction": ["auction", "sale", "lane", "branch"],
            "vehicle": ["vehicle", "detail", "vin", "damage", "runanddrive"],
            "documents": ["title", "document", "report"],
        }
        for cat, markers in mapping.items():
            if any(m in low for m in markers):
                return cat
        return "other"

    def export(self) -> dict[str, Any]:
        responses = sorted(self.json_responses, key=lambda i: (i["category"] == "other", i["url"]))
        return {
            "requests": self.requests,
            "json_responses": responses,
            "capture_limits": {
                "same_origin_only": self.settings.capture.capture_same_origin_only,
                "max_requests": self.settings.capture.max_requests,
                "max_json_responses": self.settings.capture.max_json_responses,
            },
        }