import json
import time
import requests
from faker import Faker
fake = Faker('zh_CN')
import random

# Dify API 配置
DIFY_API_KEY = "app-T0kpinzer52gZDGCtipsShVm"
DIFY_API_URL = "http://net2.hxzhxy.cn:5093/v1/chat-messages"
DIFY_USER = "xtlft@qq.com"


def call_dify_format_data(data: dict) -> dict:
    """
    调用 Dify 接口，传入数据，让 AI 格式化输出
    返回包含 subject 和 available 字段的字典
    """
    payload = {
        "inputs": {},
        "query": json.dumps(data, ensure_ascii=False),
        "response_mode": "blocking",
        "conversation_id": "",
        "user": DIFY_USER,
        "files": []
    }

    headers = {
        "Authorization": f"Bearer {DIFY_API_KEY}",
        "Content-Type": "application/json"
    }

    response = requests.post(
        url=DIFY_API_URL,
        headers=headers,
        json=payload,
        timeout=300
    )
    response.raise_for_status()
    time.sleep(3)
    return response.json()


def parse_dify_response(dify_resp: dict) -> dict:
    """
    解析 Dify 返回的 JSON，提取 id, subject, available
    """
    answer_str = dify_resp.get("answer", "{}")
    # 兼容 Dify 返回的字符串里有 ```json ... ``` 包裹
    answer_str = answer_str.strip()
    if answer_str.startswith("```"):
        answer_str = answer_str.strip("`")
        if answer_str.startswith("json"):
            answer_str = answer_str[4:]
        answer_str = answer_str.strip()

    parsed = json.loads(answer_str)
    return {
        "id": parsed.get("id"),
        "subject": parsed.get("subject"),
        "available": parsed.get("available", [])
    }


def build_update_sql(subject: str, available: list, record_id) -> str:
    """
    生成 update temp_schoolwork_plan 的 SQL 语句
    """
    available_json = json.dumps(available, ensure_ascii=False)
    # 用 mysql 的引号转义
    subject_escaped = subject.replace("'", "''") if subject else ""
    available_escaped = available_json.replace("'", "''")
    sql = f"UPDATE temp_schoolwork_plan SET subject='{subject_escaped}', available='{available_escaped}' WHERE id={record_id};"
    return sql


def process_records(records: list, output_file: str = "update_statements.sql", limit: int = None):
    """
    批量处理 records，调用 Dify 格式化，输出所有 update 语句到文件
    边处理边写入，避免全部跑完才发现问题
    """
    if limit:
        records = records[:limit]

    total = len(records)
    success_count = 0

    # 先清空文件（如果存在）
    with open(output_file, "w", encoding="utf-8") as f:
        f.write("-- ===== temp_schoolwork_plan 更新语句 =====\n")

    for idx, record in enumerate(records, 1):
        record_id = record.get("id")
        batch_name = record.get("batch_name", "")
        print(f"\n[{idx}/{total}] 开始处理 ID={record_id} batch_name={batch_name}")
        try:
            # 1. 调用 Dify 格式化
            print(f"  → 调用 Dify 接口...")
            dify_resp = call_dify_format_data(record)

            parsed = parse_dify_response(dify_resp)
            print(f"  → 解析结果: id={parsed['id']}, subject={parsed['subject']}, available={parsed['available']}")

            subject = parsed["subject"]
            available = parsed["available"]
            record_id = parsed["id"] or record.get("id")

            # 有效性校验：subject 或 available 任一为空/空数组都视为无效
            if not subject or not available or len(available) == 0:
                print(f"  ✗ ID={record_id} 无效: subject={subject!r}, available={available!r}，跳过")
                continue

            # 2. 生成 update 语句并立即写入文件
            sql = build_update_sql(subject, available, record_id)
            with open(output_file, "a", encoding="utf-8") as f:
                f.write(sql + "\n")
            success_count += 1
            print(f"  ✓ 写入SQL: {sql}")
        except Exception as e:
            print(f"  ✗ ID={record_id} 处理失败: {e}")
            continue

    print(f"\n全部处理完成，共生成 {success_count} 条 update 语句")
    print(f"输出文件: {output_file}")


if __name__ == "__main__":
    # 加载本地 table.json
    with open("table.json", "r", encoding="utf-8") as f:
        records = json.load(f)

    print(f"加载到 {len(records)} 条记录")

    # 批量处理，先只跑3条测试
    process_records(records, output_file="update_statements.sql", limit=3)