"""Use DeepSeek to summarize policy news into categorized Chinese briefs."""
import json, os, requests, re
from datetime import datetime, timezone, timedelta

API_KEY = "sk-bbca4a0380d549389f0d27cdea0b5228"
API_URL = "https://api.deepseek.com/v1/chat/completions"
MODEL = "deepseek-v4-flash"

INPUT = "/var/www/nav/data/policy.json"
OUTPUT = "/var/www/nav/data/policy_summary.json"
tz = timezone(timedelta(hours=8))


def load_raw():
    if not os.path.exists(INPUT):
        return []
    with open(INPUT) as f:
        data = json.load(f)
    return data.get("items", [])


def summarize(items):
    news_text = ""
    for i, item in enumerate(items[:100], 1):
        title = item.get("title", "")
        summary = item.get("summary", "")[:200].replace("<", "").replace(">", "")
        source = item.get("source", "")
        link = item.get("link", "")
        news_text += f"{i}. [{source}] {title}\n   {summary}\n   url: {link}\n\n"

    prompt = f"""你是一个政策分析助手。请从原始政策新闻中精选出**最重要的政策动态**，按优先级排序。

## 选稿标准
- 国务院/发改委/部委最新政策文件
- 习近平总书记重要讲话/活动
- 重大经济/产业政策（数字经济、AI、能源、金融）
- 重大改革举措
- 重要人事任免

## 输出
- 分类名：**政策速递**（只有一个分类）
- 每条：**15-30字完整标题**（subtitle），**300-500字政策解读摘要**（summary）
- 总计 **10-20 条**，按重要性排序

## 输出格式
每条输出到 items 数组，包含：rank, subtitle, title, source, link, summary
summary 用自然段落，关键信息用 **加粗**。

## 原始新闻
{news_text}

JSON格式: {{"categories": [{{"name":"政策速递","items":[{{"rank":1,"subtitle":"...","title":"...","source":"...","link":"...","summary":"..."}}]}}]}}"""

    resp = requests.post(
        API_URL,
        headers={"Authorization": f"Bearer {API_KEY}", "Content-Type": "application/json"},
        json={
            "model": MODEL,
            "messages": [{"role": "user", "content": prompt}],
            "temperature": 0.3,
            "max_tokens": 16000,
        },
        timeout=180,
    )

    if resp.status_code != 200:
        print(f"API error: {resp.status_code}")
        return None

    content = resp.json()["choices"][0]["message"]["content"].strip()
    if content.startswith("```"):
        lines = content.split("\n")
        content = "\n".join(lines[1:-1]) if lines[-1].strip() == "```" else "\n".join(lines[1:])

    try:
        result = json.loads(content)
    except:
        import re as re_
        content = re_.sub(r',\s*}', '}', content)
        content = re_.sub(r',\s*]', ']', content)
        try:
            result = json.loads(content)
        except:
            print(f"JSON parse failed, len={len(content)}")
            print(f"First 500: {content[:500]}")
            return None

    return result


def run():
    now = datetime.now(tz).strftime("%Y-%m-%d %H:%M")
    items = load_raw()
    if not items:
        print("No policy data")
        exit(0)

    print(f"Loaded {len(items)} policy items. AI summarizing...")
    data = summarize(items)

    if not data:
        print("Summarization failed")
        exit(1)

    result = {
        "updated_at": now,
        "categories": data.get("categories", []),
    }

    total = sum(len(c["items"]) for c in result["categories"])
    os.makedirs(os.path.dirname(OUTPUT), exist_ok=True)
    with open(OUTPUT, "w", encoding="utf-8") as f:
        json.dump(result, f, ensure_ascii=False, indent=2)

    print(f"Written {total} policy briefs -> {OUTPUT}")
    for c in result["categories"]:
        print(f"  {c['name']}: {len(c['items'])} items")


if __name__ == "__main__":
    run()