from __future__ import annotations

import json
import urllib.request
from typing import Any


UA = "Mozilla/5.0 (compatible; ai-daily-report/1.0)"


def fetch_text(url: str, timeout_seconds: int) -> str:
    req = urllib.request.Request(url, headers={"User-Agent": UA})
    with urllib.request.urlopen(req, timeout=timeout_seconds) as response:
        return response.read().decode("utf-8", "ignore")


class OpenAICompatibleClient:
    def __init__(self, *, api_key: str, base_url: str, model: str, timeout_seconds: int = 600):
        self.api_key = api_key
        self.base_url = base_url.rstrip("/")
        self.model = model
        self.timeout_seconds = timeout_seconds

    def chat(self, prompt: str) -> str:
        payload = json.dumps(
            {
                "model": self.model,
                "messages": [{"role": "user", "content": prompt}],
                "temperature": 0.2,
                "max_tokens": 8000,
            },
            ensure_ascii=False,
        ).encode("utf-8")
        req = urllib.request.Request(
            f"{self.base_url}/chat/completions",
            data=payload,
            headers={"Authorization": f"Bearer {self.api_key}", "Content-Type": "application/json"},
        )
        with urllib.request.urlopen(req, timeout=self.timeout_seconds) as response:
            data = json.loads(response.read().decode("utf-8"))
        return data["choices"][0]["message"]["content"].strip()


class BlogApiClient:
    def __init__(self, *, base_url: str, token: str, timeout_seconds: int = 25):
        self.base_url = base_url.rstrip("/")
        self.token = token
        self.timeout_seconds = timeout_seconds

    def _request(self, method: str, path: str, payload: dict[str, Any] | None = None) -> dict[str, Any]:
        data = None
        headers = {"Authorization": f"Bearer {self.token}", "User-Agent": UA}
        if payload is not None:
            data = json.dumps(payload, ensure_ascii=False).encode("utf-8")
            headers["Content-Type"] = "application/json"
        req = urllib.request.Request(f"{self.base_url}{path}", data=data, headers=headers, method=method)
        with urllib.request.urlopen(req, timeout=self.timeout_seconds) as response:
            return json.loads(response.read().decode("utf-8"))

    def create_post(self, payload: dict[str, Any]) -> dict[str, Any]:
        return self._request("POST", "/api/service/posts", payload)

    def publish_post(self, slug: str) -> None:
        self._request("POST", f"/api/service/posts/{slug}/publish")