from models import GenerationRecord, to_bj_time
from flask import request
import json
from datetime import datetime, timedelta

def get_user_history_data(user_id, page=1, per_page=10, filter_type='all'):
    """获取用户历史记录业务逻辑"""
    
    # 计算 90 天前的时间
    ninety_days_ago = datetime.now() - timedelta(days=90)
    
    query = GenerationRecord.query.filter(
        GenerationRecord.user_id == user_id,
        GenerationRecord.created_at >= ninety_days_ago,
        GenerationRecord.prompt != "解读验光单"
    )
    
    if filter_type == 'video':
        # 只看视频
        query = query.filter(GenerationRecord.image_urls.like('%"type": "video"%'))
    elif filter_type == 'image':
        # 只看图片 (排除视频)
        query = query.filter(~GenerationRecord.image_urls.like('%"type": "video"%'))
        
    pagination = query.order_by(GenerationRecord.created_at.desc())\
        .paginate(page=page, per_page=per_page, error_out=False)
    
    # 格式化 URL，兼容新旧数据格式
    def fix_minio_url(url):
        if url and ":9000/images/" in url:
            return "/files/" + url.split(":9000/images/")[-1]
        return url

    history_list = []
    for r in pagination.items:
        raw_urls = json.loads(r.image_urls)
        formatted_urls = []
        for u in raw_urls:
            if isinstance(u, str):
                # 旧数据：直接返回原图作为缩略图
                fixed_u = fix_minio_url(u)
                formatted_urls.append({"url": fixed_u, "thumb": fixed_u})
            else:
                # 修复对象格式中的 URL
                if 'url' in u:
                    u['url'] = fix_minio_url(u['url'])
                if 'thumb' in u:
                    u['thumb'] = fix_minio_url(u['thumb'])
                    
                # 如果是视频类型，提供默认预览图
                if u.get('type') == 'video' and not u.get('thumb'):
                    u['thumb'] = "https://img.icons8.com/flat-round/64/000000/play--v1.png"
                formatted_urls.append(u)
        
        history_list.append({
            "id": r.id,
            "prompt": r.prompt,
            "model": r.model,
            "urls": formatted_urls,
            "created_at": r.created_at_bj.strftime('%m-%d %H:%M')
        })
        
    return {
        "history": history_list,
        "has_next": pagination.has_next,
        "total": pagination.total
    }